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UNISONIC TECHNOLOGIES CO., LTD L16B06 CMOS IC www.unisonic.com.tw 1 of 13 Copyright © 2013 Unisonic Technologies Co., Ltd QW-R502-A45.a 16-BIT CONSTANT CURRENT LED DRIVER DESCRIPTION The L16B06 is a constant-current si nk driver specifically designed for LED display applicati ons. The device incorporates shift registers, data latches, and constant current circuitry on the silicon CMOS chip. The maximum output current value of all 16 channels is adjustable by a single external resistor. FEATURES *Constant-current outputs: 3mA to 60mA adjustable by one external resistor *Maximum output voltage: 17V *Maximum clock frequency: 25MHz *Power supply voltage: 3.3V to 5V *In-rush current control *Bit-to-bit skew: ±3% Chip-to-chip skew: ±6% *Package and pin assignment compatible to conventional LED drivers SSOP-24 (209mil) APPLICATIONS *Indoor/Outdoor LED Video Display *LED Variable Message Signs (VMS) System ORDERING INFORMATION Ordering Number Package Packing Lead Free Halogen Free L16B06L-R24-T L16B06G-R24-T SSOP-24 Tube L16B06L-R24-R L16B06G-R24-R SSOP-24 Tape Reel
UNISONIC TECHNOLOGIES CO., LTD 2 of 13 www.unisonic.com.tw Q W - R 5 0 2 - A 4 5 . a PIN CONNECTION PIN DESCRIPTION PIN No. PIN NAME FUNCTION 1 GND Ground terminal. 2 DAI Serial data input terminal. 3 DCK Synchronous clock input terminal for serial data transfer. Data is sampled at the rising edge of DCK. 4 LAT Input terminal of data strobe. Data on shift register goes through at the high level of LAT (level trigger). Otherwise, data is latched. 5-20 OUT0-15 Sink constant-current outputs (open-drain). 21 EN Output enable terminal: ‘H’ for all outputs are turned off, ‘L’ for all outputs are active. 22 DAO Serial data output terminal. 23 REXT External resistors connected between REXT and GND for output current value setting. 24 V DD Supply voltage terminal.
UNISONIC TECHNOLOGIES CO., LTD 3 of 13 www.unisonic.com.tw Q W - R 5 0 2 - A 4 5 . a BLOCK DIAGRAM
UNISONIC TECHNOLOGIES CO., LTD 4 of 13 www.unisonic.com.tw Q W - R 5 0 2 - A 4 5 . a EQUIVALENT CIRCUIT OF INPUTS AND OUTPUTS 1. DCK, DAI, LAT, EN TERMINALS 2. DAO TERMINALS
UNISONIC TECHNOLOGIES CO., LTD 5 of 13 www.unisonic.com.tw Q W - R 5 0 2 - A 4 5 . a MAXIMUM RATINGS (TA=25C, TJ=150C) CHARACTERISTIC SYMBOL RATING UNIT Supply Voltage V DD -0.3 ~ 7.0 V Input Voltage V IN -0.3 ~ VDD+0.3 V Output Current I OUT 70 mA Output Voltage V OUT -0.3 ~ 17 V Input Clock Frequency F DCK 25 MHz Operating Temperature T OPR -40 ~ 85 C Storage Temperature T STG -55 ~ 150 C RECOMMENDED OPERATING CONDITION CHARACTERISTIC SYMBOL CONDI TION MIN TYP MAX UNIT Supply Voltage V DD 3.3 5.0 5.5 V Output Voltage V OUT Driver On 1.0 0.5×VDD V Output Voltage V OUT Driver Off 17 V Output Current I O OUTn 5 60 mA Input Voltage VIH VDD=3.3V ~ 5.5V 0.8×VDD V DD V VIL 0.0 0.2×VDD ELECTRICAL CHARACTERISTICS (VDD=5.0 V, TA=25C, unless otherwise specified) CHARACTERISTIC SYMBOL CONDI TION MIN TYP MAX UNIT Input Voltage “H” Level V IH CMOS logic level 0.8×V DD V DD V Input Voltage “L” Level V IL CMOS logics2 level GND 0.2×V DD V Output Leakage Current I OL V OH=17V ±1 µA Output Voltage (DAO) VOL I OL=1.5mA 0.2 V VOH I OH=1.4mA V DD-0.2 V Output Current Skew (Channel-to-Channel) IOL1 VOUT=1.0V, RREXT=2.2KΩ ±3 % Output Current Skew (Chip-to-Chip) IOL2 ±6 % Output Voltage Regulation % / V OUT RREXT =2.2KΩ, VOUT=1V ~ 3V ±0.1 ±0.5 %/V Supply Voltage Regulation % / V DD R REXT =2.2KΩ ±1 ±4
UNISONIC TECHNOLOGIES CO., LTD 6 of 13 www.unisonic.com.tw Q W - R 5 0 2 - A 4 5 . a ELECTRICAL CHARACTERISTICS(Cont.) CHARACTERISTIC SYMBOL CONDI TION MIN TYP MAX UNIT Supply Current IDD(OFF) power on all pins are open unless VDD and GND 3 4 mA IDD(OFF) input signal is static Rrext=2.9KΩall outputs turn off 5 6 mA IDD(ON) input signal is static Rrext=2.9KΩall outputs turn on 5 6 mA IDD(OFF) input signal is static Rrext=1.05KΩall outputs turn off 9 10 mA IDD(ON) input signal is static Rrext=1.05KΩall outputs turn on 9 10 mA SWITCHING CHARACTERISTICS (VDD=5.0V, TA=25C, unless otherwise specified) CHARACTERISTIC SYMBOL CONDITION MIN TYP MAX UNIT Propagation Delay (‘L’ to ‘H’) EN-to-OUT0 tPLH VIH=VDD, VIL=GND RREXT=2.2kΩ, VL=5.0V, CL=13pF 52 ns LAT-to-OUT0 49 ns DCK-to-DAO 20 ns Propagation Delay (‘H’ to ‘L’) EN-to-OUT0 tPHL 22 ns LAT-to-OUT0 75 ns DCK-to-DAO 19.5 ns Output Current Rise Time tOR 33.5 ns Output Current Fall Time tOF 6 ns Output Delay Time (OUT(n)-to-OUT(n+1)) tOD 5 ns SWITCHING CHARACTERISTICS (VDD=3.3V, TA=25C, unless otherwise specified) CHARACTERISTIC SYMBOL CONDITI ON MIN. TYP. MAX. UNIT Propagation Delay (‘L’ to ‘H’) EN-to-OUT0 tPLH VIH=VDD, VIL=GND RREXT =2.2KΩ VL=5.0V, CL=13pF 51 ns LAT-to-OUT0 21.5 ns DCK-to-DAO 12 ns Propagation Delay (‘H’ to ‘L’) EN-to-OUT0 tPHL 23 ns LAT-to-OUT0 49 ns DCK-to-DAO 11.5 ns Output Current Rise Time t OR 35 ns Output Current Fall Time t OF 10 ns Output Delay Time (OUT(n)-to-OUT(n+1)) tOD 10 ns
UNISONIC TECHNOLOGIES CO., LTD 7 of 13 www.unisonic.com.tw Q W - R 5 0 2 - A 4 5 . a SWITCHING CHARACTERISTICS(Cont.)
UNISONIC TECHNOLOGIES CO., LTD 8 of 13 www.unisonic.com.tw Q W - R 5 0 2 - A 4 5 . a TIMING DIAGRAM 1. DCK-DAI, DAO DCK DAI DAO tWDCK tSEPUP(D) t HOLD(D) tPLH tPHL tWDCK 2. DCK-LAT 3. LAT-OUT0
UNISONIC TECHNOLOGIES CO., LTD 9 of 13 www.unisonic.com.tw Q W - R 5 0 2 - A 4 5 . a TIMING DIAGRAM(Cont.) 4. EN -OUT0 5. OUTn+1-OUTn CONSTANT-CURRENT OUTPUT Constant-current value of each output channel is set by an external resistor connected between the REXT pin an GND. Varying the resistor value can adjust the current scale ranging from 3mA to 60mA. The reference voltage of REXT terminal (Vrext) is approximately 1.2V. The output current value is calculated roughly by the following equation: REXT OUT REXT V( V )I( m A ) M R( K Ω) Iout(mA) 3 5 10 20 30 40 50 M 55 54.1 50 46.6 45 43.3 41.6s In order to obtain a good performance of constant-current output, a suitable output voltage is necessary.
UNISONIC TECHNOLOGIES CO., LTD 10 of 13 www.unisonic.com.tw Q W - R 5 0 2 - A 4 5 . a SERIAL DATA INTERFACE The serial-in data (DAI) will be clocked into 16 bit shi ft register synchronized on the rising edge of the clock (DCK). The data ‘1’ represents the corresponding current output ‘ON’, while the data ‘0’ stands for ‘OFF’. The data will be transferred into the 16 bit latch register when the st robe signal (LAT) is ‘H’ (level trigger); otherwise, the data will be held. The trigger timing of the serial-out data (DAO) will be shifted out on synchronization to the rising edge of the clock. All outputs are turned off while enable terminal (EN) is kept at high level. And they are active when EN shifts to low.
UNISONIC TECHNOLOGIES CO., LTD 11 of 13 www.unisonic.com.tw Q W - R 5 0 2 - A 4 5 . a OUTPUTS DELAY Large in-rush currents will occur when the system activates all the outputs at once. To reduce this effect, L16B06 is designed to have a constant unit of delay (around 5n s) between outputs. The delay sequence for every output goes like this: OUT0 (no delay) → OUT15 → OUT1 → OUT14 → OUT2 → OUT13 → OUT3 → OUT12 → OUT4 → OUT11 → OUT5 → OUT10 → OUT6 → OUT9 → OUT7 → OUT8 (the largest delay). GLOBAL BRIGHTNESS CONTROL L16B06 has no built-in global brightness cont rol feature. In order to obtain a lo wer resolution of global brightness control effect, two methods could be ut ilized. One is providing PWM signal sy nchronized on latch pulse to modulate the output enable terminal ( EN pin). The other is to adjust the R REXT value or voltage drop across the external resistor. Please see the reference circuit below:
UNISONIC TECHNOLOGIES CO., LTD 12 of 13 www.unisonic.com.tw Q W - R 5 0 2 - A 4 5 . a POWER DISSIPATION The power dissipation of a semiconductor chip is limit ed to its package and ambient temperature, in which the device requires the maximum output cu rrent calculated for given operating conditions. The maximum allowable power consumption can be calculated by the following equation: TJ (Junction temperature)(max)(°C) – TA(Ambient Temperature) PD(max)(watt)= RTH (Junction - to – air thermal resistance)(°C/watt) The power consumption of IC can be determined by t he following equation an should be less than the maximum allowable power dissipation: PD(W) = VCC(V) × I DD(A) + VOUT 0 × I OUT 0 × D UTY 0 + ….. + V OUT 15 × I OUT 15 × D UTY 15 ≤ PD (max)(W) TYPICAL APPLICATION
UNISONIC TECHNOLOGIES CO., LTD 13 of 13 www.unisonic.com.tw Q W - R 5 0 2 - A 4 5 . a TYPICAL APPLICATION(Cont.) UTC assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other parameters) listed in products specifications of any and all UTC products described or contained herein. UTC products are not designed for use in life support appliances, devices or systems where malfunction of these products can be reasonably expected to result in personal injury. Reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. The information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed without notice.