CAT4008W-T2 ONSEMI | Alldatasheet

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Technical content

Characteristics subject to change without notice 8-Channel Constant Current LED Driver

FEATURES

„ 8 Constant current-sink channels „ Serial interface up to 25MHz clock frequency „ 3V to 5.5V logic supply „ LED current range from 2mA to 100mA „ LED current set by external RSET resistor „ 300mV LED dropout at 30mA „ Thermal shutdown protection „ Available in RoHS-compliant 16-lead SOIC (150 and 300mil wide), and TSSOP packages

APPLICATIONS

„ Billboard Display „ Marquee Display „ Instrument Display „ General Purpose Display 0HFor Ordering Information details, see page 13.

DESCRIPTION

The CAT4008 is an 8 channel constant current driver for LED billboard and other general display applications. LED channel currents are programmed together via an external RSET resistor. Low output voltage operation on the LED channels as low as 0.4V (for 2 to 100mA LED current ) allows for more power efficient designs. A high-speed 4-wire serial interface of up to 25MHz clock frequency controls each individual channel using a shift register and latch configuration. A serial output data pin (SOUT) allows multiple devices to be cascaded and programmed via one serial interface. The device also includes a blanking control pin (BLANK) that can be used to disable all channels independently of the interface. Thermal shutdown protection is incorporated in the device to disable the LED outputs if the die temperature exceeds a set limit. The device is available in the 16-lead SOIC (narrow and wide), and TSSOP packages. TYPICAL APPLICATION CIRCUIT LED1VDD VIN 3V to 5.5V 1µF 20mA 3.09kΩ BLANK LATCH CONTROLLER SIN CLK LED2 GND CAT4008 LED8 SOUT to next device RSET

Characteristics subject to change without notice

ORDERING INFORMATION

Part Number Package Quantity per Reel Package Marking CAT4008W-T2 SOIC16 (N) (1) 2,000 CAT4008W CAT4008V-T1 SOIC16 (W) (1)(2) 1,000 CAT4008V CAT4008Y-T2 TSSOP16 (1)(2) 2,000 CAT4008Y CAT4008Y-GT2 TSSOP16 (3) 2,000 CAT4008Y PIN CONFIGURATION 16-Lead SOIC (W, V), TSSOP (Y) Notes: (1) Matte-Tin Plated Finish (RoHS-compliant). (2) Contact factory for package availability. (3) NiPdAu Plated Finish (RoHS-compliant). 11 6GND VDD 21 5SIN RSET 31 4SCLK SOUT 41 3XLAT BLANK 51 2LED1 LED8 61 1LED2 LED7 71 0LED3 LED6 89LED4 LED5

Characteristics subject to change without notice ABSOLUTE MAXIMUM RATINGS Parameter Rating Units VDD Supply Voltage 6 V Logic input/output voltage (SIN, SOUT, CLK, BLANK, LATCH) -0.3V to V DD+0.3V V LEDn voltage 6 V DC output current on LED1 to LED8 150 mA Storage Temperature Range -55 to +160 °C Junction Temperature Range -40 to +150 °C Lead Soldering Temperature (10sec.) 300 °C RECOMMENDED OPERATING CONDITIONS Parameter Range Units VDD 3.0 to 5.5 V Voltage applied to LED1 to LED8 0.4 to 5.5 V LED current RSET control range up to 100 mA Ambient Temperature Range -40 to +85 °C ELECTRICAL OPERATING CHARACTERISTICS DC CHARACTERISTICS VDD = 5.0V, TAMB = 25 ºC, over recommended operating conditions unless specified otherwise. Symbol Name Conditions Min Typ Max Units VLED = 1V, RSET = 3.08kΩ 18 20 22 VLED = 1V, RSET = 1.54kΩ 36 40 44 ILED-ACC LED Current (any channel) VLED = 1V, RSET = 769Ω 80 mA VLED = 1V, RSET = 3.08kΩ ±1.5 VLED = 1V, RSET = 1.54kΩ -6.0 ±1.5 +6.0 ILED-MAT LED Current Matching (ILED - ILEDAVR) / ILEDAVR VLED = 1V, RSET = 769Ω ±2.0 ΔIVDD LED current regulation vs. VDD VDD within 4.5V and 5.5V LED current 30mA ±0.1 % / V ΔIVLED LED current regulation vs. VLED VLED within 1V and 3V LED current 30mA ±0.05 % / V RSET = 3.08kΩ 2 8 mA IDDOFF Supply Current (all outputs off) RSET = 769Ω 5.5 mA RSET = 3.08kΩ 2.5 9 mA IDDON Supply Current (all outputs on) RSET = 769Ω 6.2 mA ILKG LEDn output Leakage V LED = 5V, outputs off -1 1 µA RLATCH LATCH Pull-down Resistance 100 180 300 k Ω RBLANK BLANK Pull-up Resistance 100 180 300 k Ω VIH VIL Logic high input voltage Logic low input voltage 0.7xV DD 0.3xVDD V V VHYS Logic input hysteresis voltage 0.1xVDD V IIL Logic Input leakage current (CLK, SIN) V I = VDD or GND -5 0 5 µA VOH VOL SOUT logic high output voltage SOUT logic low output voltage IOH = -1mA IOL = 1mA VCC-0.3V 0.3 V VRSET RSET Regulated Voltage BLANK hi gh, outputs off 1.17 1.20 1.23 V TSD Thermal Shutdown 160 ºC THYST Thermal Hysteresis 20 ºC

Characteristics subject to change without notice TIMING CHARACTERISTICS For 3.0V ≤ VDD ≤ 5.5V, TAMB = 25 ºC, unless specified otherwise. Symbol Name Conditions Min 1F (1) Typ 2F (2) Max 3F (1) Units CLK fclk CLK Clock Frequency 25 MHz tcwh CLK Pulse Width High 20 ns tcwl CLK Pulse Width Low 20 ns SIN tssu Setup time SIN to CLK 4 ns tsh Hold time SIN to CLK 4 ns LATCH tlwh LATCH Pulse width 20 ns Tlh Hold time LATCH to CLK 4 ns Tlsu Setup time LATCH to CLK Channel Stagger Delay 400 ns LEDn tld LED1 Propagation delay LATCH to LED1 off/on 40 300 ns tls LED Propagation delay stagger LED(n) to LED(n+1) 17 40 ns tlst LED Propagation delay stagger total LED1 to LED8 120 ns tbd BLANK Propagation delay BLANK to LED(n) off/on 60 300 ns tlr LED rise time (10% to 90%) Pull-up resistor = 50 Ω to 3.0V 40 200 ns tlf LED fall time (90% to 10%) Pull-up resistor = 50 Ω to 3.0V 30 250 ns SOUT tor SOUT rise time (10% to 90%) C L = 15pF 5 ns tof SOUT fall time (90% to 10%) C L = 15pF 5 ns tod Propagation delay time SOUT CLK to SOUT 8 15 25 ns TEST CIRCUIT FOR AC CHARACTERISTICS Notes: (1) All min and max values are guaranteed by design. (2) V DD = 5V, LED current 30mA. LED1 VDD VDD 1µF BLANK LATCH CONTROLLER SIN CLK GND CAT4008 LED8 SOUT RSET RSET 15pF Cl Rp 50 Ω Rp 50 Ω

Characteristics subject to change without notice TYPICAL PERFORMANCE CHARACTERISTICS VDD = 5.0V, LED current 30mA, all LEDs On, TAMB = 25°C unless otherwise specified. LED Current vs. LED Pin Voltage LED PIN [V] LED CURRENT [mA] Supply Current vs. VDD Pin Voltage 1.0 1.5 2.0 2.5 3.0 3.5 4.0 VDD [V] SUPPLY CURRENT [mA]All LED's OFF All LED's ON LED Current vs. VDD Pin Voltage 28.5 29.0 29.5 30.0 30.5 31.0 31.5 VDD [V] LED CURRENT [mA] Supply Current vs. RSET Current RSET CURRENT [mA] SUPPLY CURRENT [mA] All LED's ON All LED's OFF RSET Voltage vs. VDD Pin Voltage 1.10 1.15 1.20 1.25 1.30 VDD [V] RSET PIN [V] LED Current vs. RSET Resistor 100 0.1 1.0 10.0 100.0 RSET [kΩ] LED CURRENT [mA]

Characteristics subject to change without notice TYPICAL PERFORMANCE CHARACTERISTICS VDD = 5.0V, LED current 30mA, all LEDs On, TAMB = 25°C unless otherwise specified. RSET Voltage vs. Temperature 1.10 1.15 1.20 1.25 1.30 -50 0 50 100 150 TEMPERATURE [°C] RSET PIN [V] LED Current vs. Temperature 28.5 29.0 29.5 30.0 30.5 31.0 31.5 -50 0 50 100 150 TEMPERATURE [°C] LED CURRENT [mA] Internal Pull-Down Current (LATCH pin) 012345 LATCH VOLTAGE [V] PULL-DOWN CURRENT [μA] . Internal Pull-Up Current (BLANK pin) 012345 BLANK VOLTAGE [V] PULL-UP CURRENT [μA] . PWM Dimming on BLANK pin (f = 10kHz) 100 0 5 10 15 20 25 30 LED CURRENT [mA] DUTY CYCLE [%] BLANK Transient Response

SOUT Serial data output pin. pin must be connected to the ground plane on the PCB. internal register on each rising edge of CLK. isolated from the state of the serial shift register. LED1 – LED8 are the LED current sink channels. Table 1. LED Current and RSET resistor values

Figure 2. CAT4008 Functional Block Diagram accurately regulate the LED current in each channel. channel current to about 51 times the current in RSET. and efficiency of the LED driver. all latches and shift registers and sets all outputs to off. reached the device can be programmed. therefore allowing usage of smaller bypass capacitors. off-state when not externally driven. register (S1-S8) and an 8-bit latch (L1-L8). of the contents of the serial to parallel register.

Characteristics subject to change without notice PACKAGE OUTLINE DRAWINGS SOIC 16-Lead Narrow Body 150mils (W) (1)(2) Notes: (1) All dimensions in millimeters. Angle in degrees. (2) Compiles with JEDEC MS-012 TOP VIEW PIN#1 IDENTIFICATION E D A e b L h c SIDE VIEW END VIEW θ SYMBOL MIN NOM MAX A1 . 3 5 1 . 7 5 A1 0.10 0.25 b0 . 3 3 0 . 5 1 c0 . 1 9 0 . 2 5 D 9.80 9.90 10.00 E 5.80 6.00 6.20 E1 3.80 3.90 4.00 e 1.27 BSC h0 . 2 5 0 . 5 0 L0 . 4 0 1 . 2 7 θ 0º 8º For current Tape and Reel information, download the PDF file from: http://www.catsemi.com/documents/tapeandreel.pdf.

Characteristics subject to change without notice SOIC 16-Lead Wide Body 300mils (V) (1)(2) Notes: (1) All dimensions in millimeters. Angle in degrees. (2) Compiles with JEDEC MS-013. L h EE1 PIN #1 IDENTIFICATION D A c b e TOP VIEW SIDE VIEW END VIEW θ SYMBOL MIN NOM MAX A 2.36 2.49 2.64 A1 0.10 0.30 b 0.33 0.41 0.51 c 0.18 0.23 0.28 D 10.08 10.31 10.49 E 10.01 10.31 10.64 E1 7.39 7.49 7.59 e 1.27 BSC h 0.25 0.75 L 0.38 0.81 1.27 θ 0º 8º For current Tape and Reel information, download the PDF file from: http://www.catsemi.com/documents/tapeandreel.pdf.

Characteristics subject to change without notice TSSOP 16-Lead 4.4mm (Y) (1)(2) Notes: (1) All dimensions in millimeters. Angle in degrees. (2) Compiles with JEDEC MO-153. PIN#1 IDENTIFICATION D TOP VIEW SIDE VIEW END VIEW e E1 E b c L A SYMBOL MIN NOM MAX A1 . 1 0 A1 0.05 0.15 A2 0.85 0.95 b 0.19 0.30 c 0.13 0.20 D 4.90 5.10 E 6.30 6.50 E1 4.30 4.50 e 0.65 BSC L1 . 0 0 R E F L1 0.45 0.75 θ10 ° 8 ° For current Tape and Reel information, download the PDF file from: http://www.catsemi.com/documents/tapeandreel.pdf.

Characteristics subject to change without notice EXAMPLE OF ORDERING INFORMATION (1) Notes: (1) All packages are RoHS-compliant (Lead-free, Halogen-free). (2) The standard lead finish is Matte-Tin. (3) The device used in the above example is a CAT40 08W–T2 (TSSOP, NiPdAu, Tape & Reel, 2,000/Reel). (4) Contact factory for package availability. (5) For additional package and temperatur e options, please contact your nearest ON Semiconductor Sales office. Prefix Device # Suffix CAT 4008 Y – G T2 Product Number 4008 Tape & Reel T: Tape & Reel 1: 1,000/Reel 2: 2,000/Reel Package W: SOIC, 150mils V: SOIC, 300mils (4) Y: TSSOP (4) Optional Company ID Lead Finish G: NiPdAu Blank: Matte-Tin (4)

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REVISION HISTORY

Date Rev. Reason 10-Jan-08 A Initial Issue 17-Nov-08 B Change logo and fine print to ON Semiconductor 03-Feb-09 C Update Ordering Information with NiPdAu Plated Finish package