KTD2052 KINETIC | Alldatasheet
Document overview
- Manufacturer or author: Provided By alldatasheet.com(free datasheet download site)
- PDF pages: 29
Technical content
Features
- Drives up to 12 LEDs (4 RGBs)
- Multiplexed LED Current Driver Outputs Only 4 PCB Traces to the LEDs 20.8kHz MUX Frequency Prevents Audio Noise
- 14 Million Colors LED Current: 125µA to 24mA in 125µA Steps Night-Mode: 8µA to 1.5mA in 8µA Steps 5% Max. Current Accuracy & Matching
- 12 Independent Exponential Fade-Engines Ultra-Smooth 3072-Step (8µA) Fade Resolution 3-bit Programmable Fade-Rate
- Flexible Pattern Generator with Watchdog Counter
- Optional AutoBreathe™ Mode (KTD2052B/D)
- Patented1 BrightExtend™ Technology Maintains Color-Accuracy and PSRR for Battery- Powered Applications with Low Vin
- Proprietary CoolExtend™ Technology 2-bit Programmable Maximum Die-Temp
- 0.6µA Automatic Shutdown (Standby) Current
- 1MHz I2C Serial Interface
- 2.5V to 5.5V Operating Supply Voltage Range
- -40°C to +85°C Operating Temperature Range
- 8 pin UDFN 2x2mm (0.5mm pitch)
Applications
- AI Smart Speakers, Bluetooth / WiFi Loudspeakers
- Automotive Indicator and Ambiance Lighting
- IoT, Gaming, Toys, Indicator / Button Lighting Brief Description The KTD2052 is a fully programmable current regulator for up to four RGB LEDs (12 LEDs total). The device is ideally powered from a supply rail in the 3V to 5V nominal range. A 4-wire bus is multiplexed to reduce the pin-count and PCB traces to the LEDs. Each pin on the bus integrates a switch to the input voltage and a programmable low-dropout current sink regulator. There are four versions: the KTD2052A/C are defaulted disabled at initial power-up, while the KTD2052B/D execute an AutoBreathe™ pattern by default at initial power-up or when reset. The KTD2052A/B use 0x74 7-bit I2C slave address, while the KTD2052C/D use 0x75. See the Ordering Information section. The I2C control interface is used to set the on/off status and individual LED currents, as well as adjust the fade- rate. An internal flexible pattern generator with watchdog counter enables set-and-forget pattern executions, while more complex patterns may be executed from system firmware via the I2C interface. BrightExtend™ optionally reduces dropout when the input voltage is too low for the forward voltage of the LEDs. Programmable CoolExtend™ prevents excessive heat when the input voltage, current settings, and ambient temperature are high. The KTD2052 is packaged in RoHS and Green compliant 2mm x 2mm UDFN package. Typical Application 1. US Patent 8,482,216 B1 12-Channel RGB LED Drivers with I2C Control
October 2021 - Revision 04b Page 2 of 29 Kinetic Technologies Confidential Pin Description Pin # Name Function
8 VIN
Voltage Input to the LEDs and Supply Input for the IC – connect to a voltage source capable of supporting the maximum LED Vf and maximum current setting in the application. Connect a 10µF capacitor from VIN to GND. 7 GND Ground – connect to the PCB ground plane using multiple vias. Connect to the exposed paddle directly under the IC.
1 SCL I2C Serial Interface Clock
2 SDA I2C Serial Interface Data
6 LED1 LED connection bus, wire 1
5 LED2 LED connection bus, wire 2
4 LED3 LED connection bus, wire 3
3 LED4 LED connection bus, wire 4
-- EP Exposed Paddle -- connect to the GND pin directly under the IC and to the PCB ground plane using multiple vias directly under the IC. Pinout Diagram UDFN22-8 LED3 LED4 SCL SDA Exposed Paddle LED1 LED2 GND VIN WWYYZ Top View Top View 8-Pin 2mm x 2mm x 0.53mm Top Mark WW = Device ID Code, YYZ = Date Code & Assembly Code
October 2021 - Revision 04b Page 3 of 29 Kinetic Technologies Confidential Absolute Maximum Ratings2 (TA = +25C unless otherwise noted) Symbol Description Value Units VIN VIN to GND -0.3 to 6 V VIO SCL, SDA to GND -0.3 to 6 V VLED_n LED1, LED2, LED3, LED4 to GND -0.3 to (VIN+0.3) V TJ IC Junction Operating Temperature Range -40 to +150 C TS Storage Temperature Range -55 to +150 C TLEAD Maximum Soldering Temperature (at leads, 10 sec) +260 C ESD Ratings3 Symbol Description Value Units VESD_HBM JEDEC JS-001-2017 ESD Human Body Model (all pins) ±2 kV Thermal Capabilities4 Symbol Description Value Units ΘJA Thermal Resistance – Junction to Ambient 90 C/W ΘJC Thermal Resistance – Junction to Case 4.3 C/W PD Maximum Power Dissipation at TA = +25°C (TJ = +150°C) 1389 mW ΔPD/ΔT Derating Factor Above TA = +25°C -11.1 mW/°C
Ordering Information
Part Number AutoBreathe™ 7-bit I2C Slave Address Marking5 Operating Temperature Package KTD2052AEVAA-TR No 0x74 PJYYZ -40°C to +85°C UDFN22-8 KTD2052BEVAA-TR Yes 0x74 PPYYZ -40°C to +85°C UDFN22-8 KTD2052CEVAA-TR No 0x75 QIYYZ -40°C to +85°C UDFN22-8 KTD2052DEVAA-TR Yes 0x75 QJYYZ -40°C to +85°C UDFN22-8 2. Stresses above those listed in Absolute Maximum Ratings may cause permanent damage to the device. Functional operation at co nditions other than the operating conditions specified is not implied. Only one Absolute Maximum rating should be applied at any one time. 3. ESD Ratings conform to JEDEC industry standards. Some pins may actually have higher performance. Ratings apply with chip en abled, disabled, or unpowered, unless otherwise noted. 4. Junction to Ambient thermal resistance is highly dependent on PCB layout. Values are based on thermal properties of the device when soldered to an EV board. 5. “YYZ” is the date code and assembly code.
Figure 1. I2C Compatible Interface Timing
- Device is guaranteed to meet performance specifications over the –40°C to +85°C operating temperature range by design, characterization and
correlation with statistical process controls.
October 2021 - Revision 04b Page 5 of 29 Kinetic Technologies Confidential Electrical Characteristics (continued)7 Unless otherwise noted, the Min and Max specs are applied over the full operation temperature range of LED Driver Specifications (LED_n) Symbol Description Conditions Min Typ Max Units ILED_SET Current Setting Range 192 steps of 0.125mA/step 0 24 mA ILED_NM Night-Mode Current Setting Range 192 steps of 7.8125µA/step 0 1.5 mA ILED_ON Current Sink Range (during tSLOT) 4*ILED_SET, 192 steps of 0.5mA/step 0 96 mA ILED_ACC Current Sink Accuracy VIN=3.6V, ILED_ON = 96mA -5 ±1 +5 % ILED_MATCH Current Sink Matching VIN=3.6V, ILED_ON = 96mA, (|ILED – IAVG|)/(IAVG) -5 ±1 +5 % ILED_LIN Current Sink Linearity Offset Error ±0.1 LSB Differential Non-Linearity (DNL) ±0.4 Integral Non-Linearity (INL) ±0.7 VLED_DO Current Sink Dropout Voltage VIN=3.6V, ILED_ON = 96mA, ILED_ON reduced to 90% of what it was with 1V headroom. 210 mV ILED_LK Current Sink Leakage 0mA setting or shutdown, VLED_Nv = VIN 0.01 1 µA RON_SW LED_n Switch On-Resistance Switch on 1.3 Ω ILK_SW LED_n Switch Off Leakage Switch off, LED_n = GND 0.01 1 µA Multiplexor Timing Specifications Symbol Description Conditions Min Typ Max Units tFRAME Multiplexor Frame Time Period 43 48 53 µs Frequency 20.8 kHz tSLOT Multiplexor Slot Time ¼ of frame time 12 µs Exponential Fade Specifications Symbol Description Conditions Min Typ Max Units IFADE_STEP Fade Resolution 7.8125 µA tFADE_RATE0 Fade Time-Constant 0 Setting Range Exponential time-constant, 8 settings in octave increments 31 4000 ms Flexible Pattern Generator Symbol Description Conditions Min Typ Max Units NPG_SLOTS Number of Pattern Generator Timeslots Setting Range 3 settings, 2 timeslots per step 4 8 n/a tPG_TIME Pattern Generator Timeslot Duration Setting Range 8 settings in ½ octave increments 188 2000 ms tFADE_RATE1 Fade Time-Constant 1 Setting Range Exponential time-constant, 8 settings in octave increments 31 4000 ms (continued next page) 7. Device is guaranteed to meet performance specifications over the –40°C to +85°C operating temperature range by design, characterization and correlation with statistical process controls.
October 2021 - Revision 04b Page 6 of 29 Kinetic Technologies Confidential Electrical Characteristics (continued)8 Unless otherwise noted, the Min and Max specs are applied over the full operation temperature range of BrightExtend™ Technology Specifications Symbol Description Conditions Min Typ Max Units VDO_DETECT Current Sink Dropout Detection Voltage Threshold VLED_DO mV ILED_SCALE Global Current Scaling Range BE_EN = 1 25 100 % CoolExtend™ Technology Specifications Symbol Description Conditions Min Typ Max Units TJ_REG Die Temperature Regulation Threshold Setting Range 4 steps of 15°C/step 90 135 °C ILED_SCALE Global Current Scaling Range 25 100 % 8. Device is guaranteed to meet performance specifications over the –40°C to +85°C operating temperature range by design, characterization and correlation with statistical process controls.
October 2021 - Revision 04b Page 7 of 29 Kinetic Technologies Confidential Typical Characteristics VIN = 3.6V, TA = +25°C, unless otherwise noted. VIN Supply Current vs. Supply Voltage VIN Supply Current vs. Temperature (VIN = 3.6V) LED Current vs. Temperature (12 Channels in 24mA Setting) LED Current vs. Temperature (6 Channels in 24mA Setting) Non-Linearity vs. LED Current Setting (full-scale error corrected; offset error not corrected) Typical Breathing Pattern Waveforms 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.5 3.5 4.5 5.5 VIN Shut Down Current (µA) VIN Supply Current (mA) VIN (V) No Load Supply Current Shutdown Current 0.2 0.4 0.6 0.8 1.2 1.4 1.6 1.8 -40 -20 0 20 40 60 80 100 VIN Supply Current (mA) Ambient Temperature (°C) -40 -20 0 20 40 60 80 100 LED Current (mA) Ambient Temperature (°C) CE_TEMP = 00 CE_TEMP = 01 CE_TEMP = 10 CE_TEMP = 11 VIN = 5V -40 -20 0 20 40 60 80 100 LED Current (mA) Ambient Temperature (°C) CE_TEMP = 00 CE_TEMP = 01 CE_TEMP = 10 CE_TEMP = 11 VIN = 5V -2.0 -1.5 -1.0 -0.5 0.0 0.5 1.0 1.5 2.0 0 40 80 120 160 200 Non-Linearity (LSBs) LED Current Setting (DEC) INL DNL VIN = 5V
Figure 2. Functional Block Diagram assign colors and configure pattern timing and behavior for the four RGB modules. current settings up to 24mA. The read-only ID register contains the vendor ID for Kinetic Technologies and chip ID for the KTD2052. die temperature status, and under-voltage lockout status or over-temperature thermal shutdown status.
- Output Short-Circuit to GND
- Output Short-Circuit to VIN
- LED Failure as a Short-Circuit
- LED Failure as an Open-Circuit
- BrightExtend™ to reduce LED Dropout due to VIN too low to support LED Vf
October 2021 - Revision 04b Page 9 of 29 Kinetic Technologies Confidential 6. CoolExtend™ to prevent warm or hot die temperature due to power dissipa tion 7. Under-Voltage Lockout due to VIN too low to support IC functionality 8. Thermal Shutdown due to excessive ambient or die temperature The CONTROL Register The CONTROL register contains bits that select Normal Mode, Night Mode, Global Off Request and Shutdown Mode, Register Reset, BrightExtend™, CoolExtend™, and the Exponential Fade-Rate. Normal Mode By default, the KTD2052A/C power up in Shutdown Mode when power is first applied at VIN. (By default, the KTD2052B/D power up in Normal Mode to execute AutoBreathe™ when power is first applied at VIN.) Enable Normal Mode operation by writing 10xxxxxx into the EN_MODE [1:0] bits in the CONTROL register (0x02). Normal Mode enables a 0 to 24mA current setting range with 125µA steps. Optionally, first program color settings and flexible pattern configuration while in Shutdown Mode, so that the RGB modules ramp immediately to the desired colors and lighting pattern upon enabling Normal Mode or Night Mode. Night Mode Enable Night Mode by writing 01xxxxxx into the EN_MODE [1:0] bits in the CONTROL register (0x02). In Night Mode, all Normal Mode LED current settings are divided by 16 for a 0 to 1.5mA current setting range with 7.8125µA steps. Note that fade ramps within Night Mode operate as normal but are still at the 7.8125µA resolution (same as normal mode). Also, note that the exponential fade engines allow fading between Normal and Night Modes. Global Off Request and Shutdown (Standby) Mode By default, the KTD2052A/C power up in Shutdown Mode when power is first applied to VIN. (By default, the KTD2052B/D power up in Normal Mode to execute AutoBreathe™ when power is first applied at VIN.) After enabling Normal Mode or Night Mode, request a return to Shutdown Mode by writing 00xxxxxx into the EN_MODE [1:0] bits in the CONTROL register (0x02). Once requested, all LEDs first fade down to zero current (off) at the programmed fade-rate time-constant. Once all LEDs reach zero current, the KTD2052 automatically enters Shutdown (Standby) Mode to reduce quiescent current. In Shutdown Mode, the I2C interface and register contents are kept alive, so long as VIN remains above the power-on reset threshold of 1.8V. Because a request for Shutdown first invokes a global fade ramp -down, certain lighting patterns, such as breathing patterns, are easily implemented by toggling between Normal Mode (or Night Mode) and Global Off Request. Register Reset Reset the registers to their default settings by writing 11xxxxxx into the EN_MODE [1:0] bits in the CONTROL register (0x02). After resetting, the CONTROL register reads back its default setting of 00000000 for KTD2052A/C and 10111100 for KTD2052B/D. BrightExtend™ Technology Patented BrightExtend™ enhances low-Vin performance for applications using a 1s Li Ion battery, 3s alkaline/NiMH batteries, or 3.3V to 4V supply rail. The BE_EN bit in the CONTROL register (0x02) enables BrightExtend™. Once enabled, if dropout is detected for any current sink, the global scal ing of all current sinks is reduced until dropout is removed. This makes use of the LED’s Vf curve, where lower LED current results in lower Vf. During BrightExtend™, all the LEDs become slightly dimmer in order to preserve the RGB color balance and maintain power supply ripple rejection (PSRR). The effect of scaling the global LED current is almost imperceptible to the human eye. When or if dropout is reduced, the global scaling gradually recovers. Global scaling is also reset in Shutdown (Standby) Mode. CoolExtend™ Technology Proprietary CoolExtend™ simplifies thermal management. The CE_TEMP [1:0] bits in the CONTROL register (0x02) select from four maximum die temperature regulation settings. If the die temperature exceeds the CoolExtend™ setting, the global scaling of all current sinks is reduced until the excessive die temperature is removed. During CoolExtend™, all the LEDs become slightly dimmer in order to reduce power dissipation in the current sinks. The effect of scaling the global LED cu rrent is almost imperceptible to the human eye. When or if die temperature is reduced, the global scaling gradually recovers. Global scaling is also reset in Shutdown (Standby) Mode.
of a fade ramp. The fade engines simply act as continuous-time smoothing filters. Figure 3. LED Brightness (current on log-scale) vs. Time vs. Fade Engine Time-Constant pattern, whenever needed for the desired effect.
- Use the Current Setting registers (0x03 to 0x0E) to set zero current for all R, G, and B LEDs. This requi res
writing to all 12 of the Current Setting registers.
- Use the Global Off Request and Shutdown from the CONTROL register (0x02). See the Global Off
Request and Shutdown Mode section of this datasheet. This requires writing to only 1 register.
October 2021 - Revision 04b Page 11 of 29 Kinetic Technologies Confidential 3. Use the Pattern Watchdog register (0x15). When a pattern is executing pattern cycles and the watchdog counts down to zero, the flexible pattern generator then automatically issues a Global Off Request. When this happens, the CONTROL register (0x02) is updated to reflect the internally generated Global Off Request. Regardless which technique is used, the LEDs fade to zero current at the programmed fade -rate setting. Flexible Pattern Generator The KTD2052 contains seven registers (0x0F to 0x15) for the internal Flexible Pattern Generator. The Flexible Pattern Generator includes a watchdog counter for the number of pattern cycles. For each pattern cycle, the number and duration of pattern timeslots is programmable. Additionally, there are two programmable fade-rates that may be applied during each of the pattern timeslots. And finally, the on/off target status of each of the four RGBs during each pattern timeslot is programmed. 1. PG_CNTL register (0x0F) – a. The PG_MODE [1:0] bits control the Flexible Pattern Generator as disabled or enabled with 4, 6, or 8 pattern timeslots. b. The PG_TIME [2:0] bits set the pattern timeslot duration in 8 steps from 188ms to 2s in ½ octave increments. c. The FADE_RATE1 [2:0] bits program a second fade-rate setting such that there are two fade-rates available for use with the Flexible Pattern Generator. 2. PG_FADE register (0x10) – Each bit in this register selects if FADE_RATE0 [2:0] or FADE_RATE1 [2:0] is used in each of the 4, 6, or 8 pattern timeslots. The selected fade-rate in each pattern timeslot applies universally to all RGBs (all LEDs). 3. PG_RGBn registers (0x11 to 0x14) – Each bit in these registers selects the on/off target status of the RGB1, RGB2, RGB3, and RGB4 modules during each of the 4, 6, or 8 pattern timeslots. Due to the nature of the exponential fade-engines, the LED currents ramp up or down within the timeslot per the selected fade-rate. Longer fade-rates may exceed the duration of the timeslot; therefore, the RGBs may or may not reach their target on/off status within the given timeslot. This allows more complex patterns within the Flexible Pattern Generator, such as a back-and-forth scanning pattern with a comet-tail effect (as popularized by the 1982 television show Knight Rider). 4. PG_WD register (0x15) – The watchdog counter sets the number of pattern cycles from 1 to 254 cycles. As the pattern cycles execute, the PG_WD register counts down and may be read to check how many cycles remain. Once the count reaches zero, the Flexible Pattern Generator stops and the KTD2052 automatically enters Shutdown (Standby) Mode. Before reaching zero, simply overwrite the count to continue executing the pattern for more cycles. To execute the pattern indefinitely (forever), simply write 0xFF; in this case, the counter remains at 255 and does not count down. At any time before the count reaches zero, the Flexible Pattern Generator may be interrupted by overwriting the watchdog count to 0 or setting the PG_MODE to off. The RGB colors (LED currents) are not part of the Flexible Pattern Generator and should be pre -programmed in the Color Setting Registers before executing the pattern. However, the RGB colors can be changed dynamically during the execution of a pattern via normal I2C commands as the pattern continues to execute automatically. Additionally, patterns that are too complicated for the Flexible Pattern Generator may be executed from software by writing to the CONTROL and Current Setting registers directly. AutoBreathe™ The KTD2052B/D product variants execute an AutoBreathe™ pattern by default at initial power-up or when reset. The AutoBreathe™ feature may be useful for a variety of reasons. For example, systems with long boot-up times benefit by providing an immediate indication to the end customer that they have power and are starting up. The AutoBreathe™ function automatically executes a mid-brightness breathing pattern in blue for all four RGBs. See the I2C Register Map and register descriptions for the specific default settings. As factory programmed, the AutoBreathe™ pattern executes for 64 watchdog cycles × 8 pattern timeslots per cycle × 500ms per timeslot = 256 seconds total. At any time during AutoBreathe™, the host system may interrupt and program a different lighting status or pattern. If not interrupted, the KTD2052B/D automatically enter Shutdown (Standby) Mode after 256 seconds. For other customized default patterns, contact an authorized Kinetic Technologies representative.
the open-drain I/O lines SDA and SCL.
- Data transfer may be initiated only when the bus is not busy.
- During data transfer, the data line must remain stable whenever the clock line is HIGH. Changes in the data line while the clock line is high are interpreted as control signals.
Figure 4. Data Transfer on I2C Serial Bus Both data and clock lines remain HIGH. A change in the state of the data line, from HIGH to LOW, while the clock is HIGH, defines a START condition. A change in the state of the data line, from LOW to HIGH, while the clock line is HIGH, defines the STOP condition. clock signal. There is one clock pulse per bit of data. bytes transferred between START and STOP conditions are not limited and are determined by the master device. The information is transferred byte-wise and each receiver acknowledges with a ninth bit.
October 2021 - Revision 04b Page 14 of 29 Kinetic Technologies Confidential I2C Read Cycle Steps:
- Master generates start condition.
- Master sends 7-bit slave address (1110100 for KTD2052) and 1-bit data direction ‘0’ for write.
- Slave sends acknowledge if the slave address is matched.
- Master sends 8-bit register address.
- Slave sends acknowledge.
- Master generates repeated start condition.
- Master sends 7-bit slave address (1110100 for KTD2052) and 1-bit data direction ‘1’ for read.
- Slave sends acknowledge if the slave address is matched.
- Slave sends the data byte of that addressed register.
- If master sends acknowledge, the register address will be incremented by one after each acknowledge and the slave will continue to send the data for the updated addressed register.
- If master sends no acknowledge, the slave will stop sending the data.
- Master generates stop condition to finish the read cycle.
October 2021 - Revision 04b Page 15 of 29 Kinetic Technologies Confidential I2C Registers I2C Slave Address Options9 7-Bit Address Write Address Read Address Bits 7 6 5 4 3 2 1 0 KTD2052A/B 0x74 0xE8 0xE9 1 1 1 0 1 0 0 R/𝑊̅ KTD2052C/D 0x75 0xEA 0xEB 1 1 1 0 1 0 1 R/𝑊̅ I2C Register Map Hex Address Name Type Access Default Reset B7 B6 B5 B4 B3 B2 B1 B0 0x00 ID Data R 1010 011n VENDOR[2:0] DIE_ID[4:0] 0x01 MONITOR Status R xxxx 0000 RSVD[3:0] SC _STAT DO _STAT COOL _STAT UV/OT _STAT 0x02 CONTROL Config R/W n0nn nn00 EN_MODE[1:0] BE_EN CE_TEMP[1:0] FADE_RATE0[2:0] 0x03 IRED1 Config R/W 0000 0000 IRED_SET1[7:0] 0x04 IGRN1 Config R/W 0000 0000 IGRN_SET1[7:0] 0x05 IBLU1 Config R/W 0n00 0000 IBLU_SET1[7:0] 0x06 IRED2 Config R/W 0000 0000 IRED_SET2[7:0] 0x07 IGRN2 Config R/W 0000 0000 IGRN_SET2[7:0] 0x08 IBLU2 Config R/W 0n00 0000 IBLU_SET2[7:0] 0x09 IRED3 Config R/W 0000 0000 IRED_SET3[7:0] 0x0A IGRN3 Config R/W 0000 0000 IGRN_SET3[7:0] 0x0B IBLU3 Config R/W 0n00 0000 IBLU_SET3[7:0] 0x0C IRED4 Config R/W 0000 0000 IRED_SET4[7:0] 0x0D IGRN4 Config R/W 0000 0000 IGRN_SET4[7:0] 0x0E IBLU4 Config R/W 0n00 0000 IBLU_SET4[7:0] 0x0F PG_CNTL Config R/W nn0n nnnn PG_MODE[1:0] PG_TIME[2:0] FADE_RATE1[2:0] 0x10 PG_FADE Config R/W 0000 0nnn PS7_F PS6_F PS5_F PS4_F PS3_F PS2_F PS1_F PS0_F 0x11 PG_RGB1 Config R/W 0000 0nnn PS7_1 PS6_1 PS5_1 PS4_1 PS3_1 PS2_1 PS1_1 PS0_1 0x12 PG_RGB2 Config R/W 0000 0nnn PS7_2 PS6_2 PS5_2 PS4_2 PS3_2 PS2_2 PS1_2 PS0_2 0x13 PG_RGB3 Config R/W 0000 0nnn PS7_3 PS6_3 PS5_3 PS4_3 PS3_3 PS2_3 PS1_3 PS0_3 0x14 PG_RGB4 Config R/W 0000 0nnn PS7_4 PS6_4 PS5_4 PS4_4 PS3_4 PS2_4 PS1_4 PS0_4 0x15 PG_WD Config R/W 0n00 0000 PG_WATCHDOG[7:0] (Note: requires two writes) x= don’t care n=0 for KTD2052A/C with default reset to off n=1 for KTD2052B/D with default reset to AutoBreathe™ ID Data Register Register Address 0x00 Bit Name Access Default Reset Description 7:5 VENDOR[2:0] R 101 Vendor Identification 101 = Kinetic Technologies 4:0 DIE_ID[4:0] R 0 011n Die Type Identification 0 0110 = KTD2052A 0 0111 = KTD2052B 9. For Alternate Slave Addresses, please contact a Kinetic Technologies representative.
October 2021 - Revision 04b Page 16 of 29 Kinetic Technologies Confidential MONITOR Status Register Register Address 0x01 Bit Name Access Default Reset Description 7:4 RSVD[3:0] R xxxx Reserved
3 SC_STAT R 0
Short-Circuit Protection Status 0 = no LED_n output is shorted to ground 1 = at least one LED_n output is shorted to ground
2 BE_STAT R 0
BrightExtend™ Dropout Status 0 = there is no dropout, or BrightExtend™ is not enabled 1 = there is dropout, and BrightExtend™ is enabled and active
1 COOL_STAT R 0
CoolExtend™ Die Temperature Status 0 = the die is not hot, and CoolExtend™ is not active 1 = the die is hot, and CoolExtend™ is active
0 UV/OT_STAT R 0
VIN Under-Voltage Lockout or Over Temperature Shutdown Status 0 = VIN is above VUVLO, and the die is not in thermal shutdown 1 = VIN is between VPOR and VUVLO, or the die is in thermal shutdown CONTROL Configuration Register Register Address 0x02 Bit Name Access Default Reset Description 7:6 EN_MODE[1:0] R/W n0 Enable Mode and Reset 00 = off (fade all to zero and then shutdown) (KTD2052A/C default) 01 = enable Night Mode (0 to 1.5mA range) 10 = enable Normal Mode (0 to 24mA range) (KTD2052B/D default) 11 = reset all registers to default settings
5 BE_EN R/W n
BrightExtend™ Enable 0 = disabled (KTD2052A/C default) 1 = enabled (KTD2052B/D default) 4:3 CE_TEMP[1:0] R/W nn CoolExtend™ Temperature Setting 00 = 135°C (KTD2052A/C default) 01 = 120°C 10 = 105°C 11 = 90°C (KTD2052B/D default) 2:0 FADE_RATE0[2:0] R/W n00 Fade-Rate 0 Exponential Time-Constant Setting 000 = 32ms (KTD2052A/C default) 001 = 63ms 010 = 125ms 011 = 250ms 100 = 500ms (KTD2052B/D default) 101 = 1s 110 = 2s 111 = 4s
October 2021 - Revision 04b Page 17 of 29 Kinetic Technologies Confidential IRED1 Configuration Register Register Address 0x03 Bit Name Access Default Reset Description 7:0 IRED_SET1[7:0] R/W 0000 0000 Red Current Setting for RGB1 0000 0000 = 0µA 0000 0001 = 125µA 1100 0000 = 24mA 1100 0001 = 24mA 1111 1111 = 24mA IGRN1 Configuration Register Register Address 0x04 Bit Name Access Default Reset Description 7:0 IGRN_SET1[7:0] R/W 0000 0000 Green Current Setting for RGB1 0000 0000 = 0µA 0000 0001 = 125µA 1100 0000 = 24mA 1100 0001 = 24mA 1111 1111 = 24mA IBLU1 Configuration Register Register Address 0x05 Bit Name Access Default Reset Description 7:0 IBLU_SET1[7:0] R/W 0n00 0000 Blue Current Setting for RGB1 0000 0000 = 0µA (KTD2052A/C default) 0000 0001 = 125µA 0100 0000 = 8mA (KTD2052B/D default) 1100 0000 = 24mA 1100 0001 = 24mA 1111 1111 = 24mA
October 2021 - Revision 04b Page 18 of 29 Kinetic Technologies Confidential IRED2 Configuration Register Register Address 0x06 Bit Name Access Default Reset Description 7:0 IRED_SET2[7:0] R/W 0000 0000 Red Current Setting for RGB2 0000 0000 = 0µA 0000 0001 = 125µA 1100 0000 = 24mA 1100 0001 = 24mA 1111 1111 = 24mA IGRN2 Configuration Register Register Address 0x07 Bit Name Access Default Reset Description 7:0 IGRN_SET2[7:0] R/W 0000 0000 Green Current Setting for RGB2 0000 0000 = 0µA 0000 0001 = 125µA 1100 0000 = 24mA 1100 0001 = 24mA 1111 1111 = 24mA IBLU2 Configuration Register Register Address 0x08 Bit Name Access Default Reset Description 7:0 IBLU_SET2[7:0] R/W 0n00 0000 Blue Current Setting for RGB2 0000 0000 = 0µA (KTD2052A/C default) 0000 0001 = 125µA 0100 0000 = 8mA (KTD2052B/D default) 1100 0000 = 24mA 1100 0001 = 24mA 1111 1111 = 24mA
October 2021 - Revision 04b Page 19 of 29 Kinetic Technologies Confidential IRED3 Configuration Register Register Address 0x09 Bit Name Access Default Reset Description 7:0 IRED_SET3[7:0] R/W 0000 0000 Red Current Setting for RGB3 0000 0000 = 0µA 0000 0001 = 125µA 1100 0000 = 24mA 1100 0001 = 24mA 1111 1111 = 24mA IGRN3 Configuration Register Register Address 0x0A Bit Name Access Default Reset Description 7:0 IGRN_SET3[7:0] R/W 0000 0000 Green Current Setting for RGB3 0000 0000 = 0µA 0000 0001 = 125µA 1100 0000 = 24mA 1100 0001 = 24mA 1111 1111 = 24mA IBLU3 Configuration Register Register Address 0x0B Bit Name Access Default Reset Description 7:0 IBLU_SET3[7:0] R/W 0n00 0000 Blue Current Setting for RGB3 0000 0000 = 0µA (KTD2052A/C default) 0000 0001 = 125µA 0100 0000 = 8mA (KTD2052B/D default) 1100 0000 = 24mA 1100 0001 = 24mA 1111 1111 = 24mA
October 2021 - Revision 04b Page 20 of 29 Kinetic Technologies Confidential IRED4 Configuration Register Register Address 0x0C Bit Name Access Default Reset Description 7:0 IRED_SET4[7:0] R/W 0000 0000 Red Current Setting for RGB4 0000 0000 = 0µA 0000 0001 = 125µA 1100 0000 = 24mA 1100 0001 = 24mA 1111 1111 = 24mA IGRN4 Configuration Register Register Address 0x0D Bit Name Access Default Reset Description 7:0 IGRN_SET4[7:0] R/W 0000 0000 Green Current Setting for RGB4 0000 0000 = 0µA 0000 0001 = 125µA 1100 0000 = 24mA 1100 0001 = 24mA 1111 1111 = 24mA IBLU4 Configuration Register Register Address 0x0E Bit Name Access Default Reset Description 7:0 IBLU_SET4[7:0] R/W 0n00 0000 Blue Current Setting for RGB4 0000 0000 = 0µA (KTD2052A/C default) 0000 0001 = 125µA 0100 0000 = 8mA (KTD2052B/D default) 1100 0000 = 24mA 1100 0001 = 24mA 1111 1111 = 24mA
October 2021 - Revision 04b Page 21 of 29 Kinetic Technologies Confidential PG_CNTL Configuration Register Register Address 0x0F Bit Name Access Default Reset Description 7:6 PG_MODE[1:0] R/W nn Pattern Generator Enable and Mode 00 = PG off (software control mode) (KTD2052A/C default) 01 = PG enabled with 4 pattern-slots 10 = PG enabled with 6 pattern-slots 11 = PG enabled with 8 pattern-slots (KTD2052B/D default) 5:3 PG_TIME[2:0] R/W 0nn Pattern-Slot Duration 000 = 188ms (KTD2052A/C default) 001 = 250ms 010 = 375ms 011 = 500ms (KTD2052B/D default) 100 = 750ms 101 = 1.0s 110 = 1.5s 111 = 2.0s 2:0 FADE_RATE1[2:0] R/W nnn Fade-Rate 1 Exponential Time-Constant Setting 000 = 32ms (KTD2052A/C default) 001 = 63ms 010 = 125ms 011 = 250ms 100 = 500ms 101 = 1s 110 = 2s 111 = 4s (KTD2052B/D default) PG_FADE Configuration Register Register Address 0x10 Bit Name Access Default Reset Description
7 PS7_F R/W 0
Pattern-Slot 7 Fade-Rate Selection 0 = use FADE_RATE0 1 = use FADE_RATE1
6 PS6_F R/W 0
Pattern-Slot 6 Fade-Rate Selection 0 = use FADE_RATE0 1 = use FADE_RATE1
5 PS5_F R/W 0
Pattern-Slot 5 Fade-Rate Selection 0 = use FADE_RATE0 1 = use FADE_RATE1
4 PS4_F R/W 0
Pattern-Slot 4 Fade-Rate Selection 0 = use FADE_RATE0 1 = use FADE_RATE1
3 PS3_F R/W 0
Pattern-Slot 3 Fade-Rate Selection 0 = use FADE_RATE0 1 = use FADE_RATE1
2 PS2_F R/W n
Pattern-Slot 2 Fade-Rate Selection 0 = use FADE_RATE0 (KTD2052A/C default) 1 = use FADE_RATE1 (KTD2052B/D default)
1 PS1_F R/W n
Pattern-Slot 1 Fade-Rate Selection 0 = use FADE_RATE0 (KTD2052A/C default) 1 = use FADE_RATE1 (KTD2052B/D default)
0 PS0_F R/W n
Pattern-Slot 0 Fade-Rate Selection 0 = use FADE_RATE0 (KTD2052A/C default) 1 = use FADE_RATE1 (KTD2052B/D default)
October 2021 - Revision 04b Page 22 of 29 Kinetic Technologies Confidential PG_RGB1 Configuration Register Register Address 0x11 Bit Name Access Default Reset Description
7 PS7_1 R/W 0
Pattern-Slot 7 RGB1 On/Off Selection 0 = fade down and turn off 1 = turn on and fade up
6 PS6_1 R/W 0
Pattern-Slot 6 RGB1 On/Off Selection 0 = fade down and turn off 1 = turn on and fade up
5 PS5_1 R/W 0
Pattern-Slot 5 RGB1 On/Off Selection 0 = fade down and turn off 1 = turn on and fade up
4 PS4_1 R/W 0
Pattern-Slot 4 RGB1 On/Off Selection 0 = fade down and turn off 1 = turn on and fade up
3 PS3_1 R/W 0
Pattern-Slot 3 RGB1 On/Off Selection 0 = fade down and turn off 1 = turn on and fade up
2 PS2_1 R/W n
Pattern-Slot 3 RGB1 On/Off Selection 0 = fade down and turn off (KTD2052A/C default) 1 = turn on and fade up (KTD2052B/D default)
1 PS1_1 R/W n
Pattern-Slot 1 RGB1 On/Off Selection 0 = fade down and turn off (KTD2052A/C default) 1 = turn on and fade up (KTD2052B/D default)
0 PS0_1 R/W n
Pattern-Slot 0 RGB1 On/Off Selection 0 = fade down and turn off (KTD2052A/C default) 1 = turn on and fade up (KTD2052B/D default) PG_RGB2 Configuration Register Register Address 0x12 Bit Name Access Default Reset Description
7 PS7_2 R/W 0
Pattern-Slot 7 RGB2 On/Off Selection 0 = fade down and turn off 1 = turn on and fade up
6 PS6_2 R/W 0
Pattern-Slot 6 RGB2 On/Off Selection 0 = fade down and turn off 1 = turn on and fade up
5 PS5_2 R/W 0
Pattern-Slot 5 RGB2 On/Off Selection 0 = fade down and turn off 1 = turn on and fade up
4 PS4_2 R/W 0
Pattern-Slot 4 RGB2 On/Off Selection 0 = fade down and turn off 1 = turn on and fade up
3 PS3_2 R/W 0
Pattern-Slot 3 RGB2 On/Off Selection 0 = fade down and turn off 1 = turn on and fade up
2 PS2_2 R/W n
Pattern-Slot 3 RGB2 On/Off Selection 0 = fade down and turn off (KTD2052A/C default) 1 = turn on and fade up (KTD2052B/D default)
1 PS1_2 R/W n
Pattern-Slot 1 RGB2 On/Off Selection 0 = fade down and turn off (KTD2052A/C default) 1 = turn on and fade up (KTD2052B/D default)
0 PS0_2 R/W n
Pattern-Slot 0 RGB2 On/Off Selection 0 = fade down and turn off (KTD2052A/C default) 1 = turn on and fade up (KTD2052B/D default)
October 2021 - Revision 04b Page 23 of 29 Kinetic Technologies Confidential PG_RGB3 Configuration Register Register Address 0x13 Bit Name Access Default Reset Description
7 PS7_3 R/W 0
Pattern-Slot 7 RGB3 On/Off Selection 0 = fade down and turn off 1 = turn on and fade up
6 PS6_3 R/W 0
Pattern-Slot 6 RGB3 On/Off Selection 0 = fade down and turn off 1 = turn on and fade up
5 PS5_3 R/W 0
Pattern-Slot 5 RGB3 On/Off Selection 0 = fade down and turn off 1 = turn on and fade up
4 PS4_3 R/W 0
Pattern-Slot 4 RGB3 On/Off Selection 0 = fade down and turn off 1 = turn on and fade up
3 PS3_3 R/W 0
Pattern-Slot 3 RGB3 On/Off Selection 0 = fade down and turn off 1 = turn on and fade up
2 PS2_3 R/W n
Pattern-Slot 3 RGB3 On/Off Selection 0 = fade down and turn off (KTD2052A/C default) 1 = turn on and fade up (KTD2052B/D default)
1 PS1_3 R/W n
Pattern-Slot 1 RGB3 On/Off Selection 0 = fade down and turn off (KTD2052A/C default) 1 = turn on and fade up (KTD2052B/D default)
0 PS0_3 R/W n
Pattern-Slot 0 RGB3 On/Off Selection 0 = fade down and turn off (KTD2052A/C default) 1 = turn on and fade up (KTD2052B/D default) PG_RGB4 Configuration Register Register Address 0x14 Bit Name Access Default Reset Description
7 PS7_4 R/W 0
Pattern-Slot 7 RGB4 On/Off Selection 0 = fade down and turn off 1 = turn on and fade up
6 PS6_4 R/W 0
Pattern-Slot 6 RGB4 On/Off Selection 0 = fade down and turn off 1 = turn on and fade up
5 PS5_4 R/W 0
Pattern-Slot 5 RGB4 On/Off Selection 0 = fade down and turn off 1 = turn on and fade up
4 PS4_4 R/W 0
Pattern-Slot 4 RGB4 On/Off Selection 0 = fade down and turn off 1 = turn on and fade up
3 PS3_4 R/W 0
Pattern-Slot 3 RGB4 On/Off Selection 0 = fade down and turn off 1 = turn on and fade up
2 PS2_4 R/W n
Pattern-Slot 3 RGB4 On/Off Selection 0 = fade down and turn off (KTD2052A/C default) 1 = turn on and fade up (KTD2052B/D default)
1 PS1_4 R/W n
Pattern-Slot 1 RGB4 On/Off Selection 0 = fade down and turn off (KTD2052A/C default) 1 = turn on and fade up (KTD2052B/D default)
0 PS0_4 R/W n
Pattern-Slot 0 RGB4 On/Off Selection 0 = fade down and turn off (KTD2052A/C default) 1 = turn on and fade up (KTD2052B/D default)
October 2021 - Revision 04b Page 24 of 29 Kinetic Technologies Confidential PG_WD Configuration Register Register Address 0x15 Bit Name Access Default Reset Description 7:0 PG_WATCHDOG [7:0] R/W 0n00 0000 Pattern Watchdog Counter 0000 0000 = watchdog timed out (KTD2052A/C default) 0000 0001 = 1 pattern cycle remaining 0000 0010 = 2 pattern cycles remaining 0100 0000 = 64 pattern cycles remaining (KTD2052B/D default) 1111 1110 = 254 pattern cycles remaining 1111 1111 = infinity pattern cycles remaining (do not count down) NOTE: Write all commands to this register twice. This allows the watchdog count to be internally transferred and an I2C acknowledge issued.
October 2021 - Revision 04b Page 25 of 29 Kinetic Technologies Confidential Applications Information Input Bypass Capacitor Choose an input capacitor with voltage rating of 6.3V or more, 10µF total nominal capacitance or more, and 1608M (0603) case-size or larger. Larger values and larger case-size provide more effective capacitance when considering the DC bias derating characteristic of the capacitor. Additional Input Bulk Capacitance Note that if the PCB’s input voltage is supplied through a connector or a cable, add additional bypass capacitance where VIN first arrives to the PCB to control input ripple and ringing. Typically, use one or two 22µF ceramic capacitors in parallel. RGB LED Selection Choose RGB modules with suitable color, brightness, and power dissipation to handle the requirements of the application. The LEDs must have reverse voltage rating of VR = 5V or more. Do not use RGB modules with integrated Zener diode protection clamps that do not allow reverse voltage, as these are incompatible with the multiplexing in the KTD2052. Additionally, the LEDs should have a guaranteed minimum operating current of 2mA or less. Recommended RGB LEDs Manufacturer Model # Luminous Intensity (typ) Size Cree CLV1L-FKB Series Red = 673mcd Green = 1260mcd Blue = 266mcd PLCC-4 3.2 x 2.8 x 1.9mm Everlight 19-337C/RSBHGHC-A88/4T(KNT) 19-337C/RSBHGHC-A88/4T Red = 565mcd Green = 1270mcd Blue = 255mcd SMD-6 1.6 x 1.6 x 0.5mm Kingbright10 APTF1616SEEZ Series Red = 110mcd Green = 280mcd Blue = 70mcd SMD-4 1.6 x 1.6 x 0.7mm Lite-On LTST-C19HE1WT Red = 92mcd Green = 230mcd Blue = 71mcd SMD-4 1.6 x 1.6 x 0.35mm SunLED10 XZMDKDGCBD110W Red = 79mcd Green = 278mcd Blue = 69mcd SMD-4 1.6 x 1.6 x 0.7mm Würth Elektronik WL-SFCW SMD 150066M173000 Red = 70mcd Green = 360mcd Blue = 80mcd SMD-4 1.6 x 1.6 x 0.4mm Please tell the LED manufacturer that you are using the KTD2052 RGB LED driver IC. Note that the Everlight RGB has high-intensity in small package size at good value and is therefore chosen for the KTD20 52 Evaluation Board. 10. These RGB LEDs are pin-to-pin.
October 2021 - Revision 04b Page 27 of 29 Kinetic Technologies Confidential De-Ghosting Ghosting is defined as unintended light glow emitting from LEDs that are supposed to be off. It is an inherent artifact when multiplexing LEDs, especially when using LEDs that have very different Vf. In the case of RGB LEDs, the red LED Vf is much lower than the green and blue Vf. However, with simple techniques, all ghosting can be controlled and eliminated when using the KTD2052. Many lighting patterns do not manifest any ghosting at all – for example, breathing patterns. But for patterns with ghosting, the KTD2052 includes proprietary circuitry to reduce the ghosting artifacts. Even so, some patterns are still susceptible to ghosting. If the diffuser is not sufficiently hiding all ghosting, there are two simple solutions: 1. Software Solution – Slightly modify only the software patterns that show visible ghosting. In general, if one RGB on a bus is enabled as blue only (or green only) at a bright current setting, other RGBs on the same bus that are supposed to be off may exhibit ghosting. As an example, if intending bright blue in one RGB, there may be red and/or green glow in other nearby RGBs. One improvement is to lower the current setting of the bright blue RGB, which also lowers its Vf. Another improvement is to use slightly pastel blue instead of pure blue by turning on just a small amount of red and green in the bright blue RGB. Generally, you can eliminate all ghosting by combining both of these software improvements. By example, instead of setting the blue RGB with current settings of red = 0mA, green = 0mA, and blue = 24mA, try current settings of red = 1mA, green = 1mA, and blue = 16mA. 2. Hardware Solution – Insert a small signal diode, such as 1N4148, in series with each red LED to effectively increase its Vf. Pattern Generation using System Software or the Flexible Pattern Generator An Evaluation System is available for the KTD2052 that demonstrates how to program multiple example patterns. The examples are written as parameterized, reusable functions in Python script. These functions are easy to translate into other software languages.
- A 2-layer or higher PCB is recommended for robust ground connections and for thermal power dissipation
with the exposed paddle package.
- Place multiple vias directly under the IC from the exposed paddle landing pattern to the ground plane.
- Connect the GND pin to the exposed paddle directly under the IC on the top layer.
- Place the input bypass capacitor as close to the VIN and GND pins as possible. Connect the ground
to the power plane or trace, using multiple vias if applicable.
- If power is supplied through a cable/connector, add additional bulk bypass capacitance near the connector
where the power first arrives to the PCB in order to control input ripple and ringing.
- Route the output traces and vias with suitable thickness, as necessary for the peak currents. Up to 288mA
temperature derating and LED pulse current ratings. Figure 9. Recommended PCB Layout
October 2021 - Revision 04b Page 29 of 29 Kinetic Technologies Confidential Packaging Information UDFN22-8 (2.0mm x 2.0mm x 0.53mm) 0.50mm typ. 0.22mm 2.00mm ±0.05mm 2.00mm ±0.05mm 0.127mm 0.53mm ±0.05mm Bottom ViewSide ViewTop View Top Side Die Coating A1 Corner -0.04mm +0.08mm 1.50mm ±0.05mm 1.00mm ±0.05mm 0.28mm ±0.05mm Recommended Footprint 0.50mm 0.26mm 1.00mm 1.50mm 1.40mm 0.65mm Kinetic Technologies cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Kinetic Technologies product. No intellectual property or circuit patent licenses are implied. Kinetic Technologies reserves the right to change the circuitry and specifications without notice at any time.