UNISONIC TECHNOLOGIES CO., LTD L16B06 CMOS IC 16-BIT CONSTANT CURRENT LED DRIVER DESCRIPTION The L16B06 is a constant-current sink driver specifically designed for LED display applications. 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. SSOP-24 (209mil) 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 APPLICATIONS *Indoor/Outdoor LED Video Display *LED Variable Message Signs (VMS) System ORDERING INFORMATION Ordering Number Lead Free Halogen Free L16B06L-R24-T L16B06G-R24-T L16B06L-R24-R L16B06G-R24-R www.unisonic.com.tw Copyright © 2013 Unisonic Technologies Co., Ltd Package Packing SSOP-24 SSOP-24 Tube Tape Reel 1 of 13 QW-R502-A45.a L16B06 CMOS IC PIN CONNECTION PIN DESCRIPTION PIN No. 1 2 PIN NAME GND DAI 3 DCK 4 LAT 5-20 OUT0-15 21 EN 22 23 24 DAO REXT VDD FUNCTION Ground terminal. Serial data input terminal. Synchronous clock input terminal for serial data transfer. Data is sampled at the rising edge of DCK. Input terminal of data strobe. Data on shift register goes through at the high level of LAT (level trigger). Otherwise, data is latched. Sink constant-current outputs (open-drain). Output enable terminal: ‘H’ for all outputs are turned off, ‘L’ for all outputs are active. Serial data output terminal. External resistors connected between REXT and GND for output current value setting. Supply voltage terminal. UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 2 of 13 QW-R502-A45.a L16B06 CMOS IC BLOCK DIAGRAM UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 3 of 13 QW-R502-A45.a L16B06 CMOS IC EQUIVALENT CIRCUIT OF INPUTS AND OUTPUTS 1. DCK, DAI, LAT, EN TERMINALS 2. DAO TERMINALS UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 4 of 13 QW-R502-A45.a L16B06 CMOS IC MAXIMUM RATINGS (TA=25C, TJ=150C) CHARACTERISTIC Supply Voltage Input Voltage Output Current Output Voltage Input Clock Frequency Operating Temperature Storage Temperature RATING -0.3 ~ 7.0 -0.3 ~ VDD+0.3 70 -0.3 ~ 17 25 -40 ~ 85 -55 ~ 150 UNIT V V mA V MHz C C RECOMMENDED OPERATING CONDITION CHARACTERISTIC Supply Voltage Output Voltage Output Voltage Output Current Input Voltage SYMBOL VDD VIN IOUT VOUT FDCK TOPR TSTG SYMBOL VDD VOUT VOUT IO VIH VIL CONDITION Driver On Driver Off OUTn VDD=3.3V ~ 5.5V MIN 3.3 1.0 TYP 5.0 MAX 5.5 0.5×VDD 17 60 VDD 0.2×VDD 5 0.8×VDD 0.0 UNIT V V V mA V ELECTRICAL CHARACTERISTICS (VDD=5.0 V, TA=25C, unless otherwise specified) CHARACTERISTIC Input Voltage “H” Level Input Voltage “L” Level Output Leakage Current Output Voltage (DAO) Output Current Skew (Channel-to-Channel) Output Current Skew (Chip-to-Chip) SYMBOL VIH VIL IOL VOL VOH IOL1 IOL2 Output Voltage Regulation % / VOUT Supply Voltage Regulation % / VDD CONDITION CMOS logic level CMOS logics2 level VOH=17V IOL=1.5mA IOH=1.4mA TYP RREXT =2.2KΩ, VOUT=1V ~ 3V RREXT =2.2KΩ MAX VDD 0.2×VDD ±1 0.2 UNIT V V µA V V ±3 % ±6 % VDD-0.2 VOUT=1.0V, RREXT=2.2KΩ UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw MIN 0.8×VDD GND ±0.1 ±0.5 ±1 ±4 %/V 5 of 13 QW-R502-A45.a L16B06 CMOS IC ELECTRICAL CHARACTERISTICS(Cont.) CHARACTERISTIC SYMBOL IDD(OFF) IDD(OFF) Supply Current IDD(ON) IDD(OFF) IDD(ON) MIN TYP MAX UNIT 3 4 mA 5 6 mA 5 6 mA 9 10 mA 9 10 mA MAX UNIT ns ns ns ns ns ns SWITCHING CHARACTERISTICS (VDD=5.0V, TA=25C, unless otherwise specified) CHARACTERISTIC EN-to-OUT0 Propagation Delay LAT-to-OUT0 (‘L’ to ‘H’) DCK-to-DAO EN-to-OUT0 Propagation Delay LAT-to-OUT0 (‘H’ to ‘L’) DCK-to-DAO SYMBOL tPHL tOR Output Current Fall Time Output Delay Time (OUT(n)-to-OUT(n+1)) CONDITION MIN tPLH Output Current Rise Time CONDITION power on all pins are open unless VDD and GND input signal is static Rrext=2.9KΩall outputs turn off input signal is static Rrext=2.9KΩall outputs turn on input signal is static Rrext=1.05KΩall outputs turn off input signal is static Rrext=1.05KΩall outputs turn on VIH=VDD, VIL=GND RREXT=2.2kΩ, VL=5.0V, CL=13pF TYP 52 49 20 22 75 19.5 33.5 ns tOF 6 ns tOD 5 ns SWITCHING CHARACTERISTICS (VDD=3.3V, TA=25C, unless otherwise specified) CHARACTERISTIC EN-to-OUT0 Propagation Delay LAT-to-OUT0 (‘L’ to ‘H’) DCK-to-DAO EN-to-OUT0 Propagation Delay LAT-to-OUT0 (‘H’ to ‘L’) DCK-to-DAO Output Current Rise Time Output Current Fall Time Output Delay Time (OUT(n)-to-OUT(n+1)) SYMBOL CONDITION tPLH tPHL tOR tOF VIH=VDD, VIL=GND RREXT =2.2KΩ VL=5.0V, CL=13pF tOD UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw MIN. TYP. 51 21.5 12 23 49 11.5 35 10 10 MAX. UNIT ns ns ns ns ns ns ns ns ns 6 of 13 QW-R502-A45.a L16B06 CMOS IC SWITCHING CHARACTERISTICS(Cont.) UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 7 of 13 QW-R502-A45.a L16B06 CMOS IC TIMING DIAGRAM 1. DCK-DAI, DAO tWDCK 50 % tWDCK 50 % 50 % 50 % DCK tSEPUP(D) tHOLD(D) 50 % 50 % DAI 50 % 50 % DAO tPLH tPHL 2. DCK-LAT 3. LAT-OUT0 UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 8 of 13 QW-R502-A45.a L16B06 CMOS IC 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: IOUT(mA) Iout(mA) M 3 55 5 54.1 10 50 VREXT(V) M RREXT(KΩ) 20 46.6 30 45 40 43.3 50 41.6s In order to obtain a good performance of constant-current output, a suitable output voltage is necessary. UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 9 of 13 QW-R502-A45.a L16B06 CMOS IC SERIAL DATA INTERFACE The serial-in data (DAI) will be clocked into 16 bit shift 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 strobe 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 www.unisonic.com.tw 10 of 13 QW-R502-A45.a L16B06 CMOS IC 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 5ns) 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 control feature. In order to obtain a lower resolution of global brightness control effect, two methods could be utilized. One is providing PWM signal synchronized on latch pulse to modulate the output enable terminal ( EN pin). The other is to adjust the RREXT value or voltage drop across the external resistor. Please see the reference circuit below: UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 11 of 13 QW-R502-A45.a L16B06 CMOS IC POWER DISSIPATION The power dissipation of a semiconductor chip is limited to its package and ambient temperature, in which the device requires the maximum output current 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 the following equation an should be less than the maximum allowable power dissipation: PD(W) = VCC(V) × IDD(A) + VOUT 0 × IOUT 0 × DUTY 0 + ….. + VOUT 15 × IOUT 15 × DUTY 15 ≤ PD (max)(W) TYPICAL APPLICATION UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 12 of 13 QW-R502-A45.a L16B06 CMOS IC 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. UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 13 of 13 QW-R502-A45.a