UNISONIC TECHNOLOGIES CO., LTD L16B45A Preliminary CMOS IC 16-BIT CONSTANT CURRENT LED SINK DRIVER DESCRIPTION The UTC L16B45A is designed for LED displays. UTC L16B45A contains a serial buffer and data latches which convert serial input data into parallel output format. At UTC L16B45A output stage, sixteen regulated current ports are designed to provide uniform and constant current sinks for driving LEDs within a large range of Vf variations. UTC L16B45A provides users with great flexibility and device performance while using UTC L16B45A in their system design for LED display applications, e.g. LED panels. Users may adjust the output current from 3mA to 45mA through an external resistor, Rext, which gives users flexibility in controlling the light intensity of LEDs. UTC L16B45A guarantees to endure maximum 17V at the output port. The high clock frequency, 25MHz, also satisfies the system requirements of high volume data transmission. FEATURES * 16 constant-current output channels * Constant output current invariant to load voltage change： Constant output current range: 3~45mA @ VDD=5V 3~30mA @ VDD=3.3V * Excellent output current accuracy: between channels: ±2.5% (max.), between ICs: ±3.0% (max.) * Output current adjusted through an external resistor * Fast response of output current, OE (min.): 70ns @ VDD=3.3V * 25MHz clock frequency * Schmitt trigger input * 3.3V/5V supply voltage * Halogen Free ORDERING INFORMATION Ordering Number L16B45AG-R24-R www.unisonic.com.tw Copyright © 2015 Unisonic Technologies Co., Ltd Package SSOP-24 Packing Tape Reel 1 of 12 QW-R102-071.a L16B45A Preliminary MARKING PIN CONFIGURATION PIN DESCRIPTION PIN NO. 1 2 3 PIN NAME GND SDI CLK 4 LE 5~20 OUT0 ~ OUT15 21 OE 22 SDO 23 R-EXT 24 VDD CMOS IC DESCRIPTION Ground terminal for control logic and current sink Serial-data input to the shift register Clock input terminal for data shift on rising edge Data strobe input terminal Serial data is transferred to the output latch when LE is high. The data is latched when LE goes low. Constant current output terminals Output enable terminal When (active) low, the output drivers are enabled; when high, all output drivers are turned OFF (blanked). Serial-data output to the following SDI of next driver IC Input terminal used to connect an external resistor for setting up output current for all output channels 3.5V/5V supply voltage terminal UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 2 of 12 QW-R102-071.a L16B45A Preliminary CMOS IC BLOCK DIAGRAM UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 3 of 12 QW-R102-071.a L16B45A Preliminary CMOS IC ABSOLUTE MAXIMUM RATING PARAMETER SYMBOL RATINGS UNIT Supply Voltage VDD 0~7.0 V Input Voltage VIN -0.4~VDD+0.4 V Output Current IOUT +45 mA Output Voltage VDS -0.5~+17.0 V GND Terminal Current IGND 720 mA Power Dissipation (On PCB, TA=25°C) PD 1.37 W Thermal Resistance (On PCB, TA=25°C) θJA 91 °C/W Junction Temperature TJ 150 °C Operating Temperature TOPR -40~+85 °C Storage Temperature TSTG -55~+150 °C Note: Absolute maximum ratings are those values beyond which the device could be permanently damaged. Absolute maximum ratings are stress ratings only and functional device operation is not implied. DC ELECTRICAL CHARACTERISTICS (VDD=5.0V) PARAMETER Supply Voltage Output Voltage SYMBOL VDD VDS Output Current “H” Level “L” Level Output Leakage Current Input Voltage Output Voltage SDO Output Current 1 Current Skew Output Current 2 Current Skew Output Current vs. Output Voltage Regulation Output Current vs. Supply Voltage Regulation Pull-Up Resistor IOUT IOH IOL VIH VIL IOH VOL VOH IOUT1 dIOUT1 IOUT2 dIOUT2 “OFF” Supply Current “ON” MIN 4.5 TYP 5.0 MAX 5.5 UNIT V 17.0 V 45 -1.0 1.0 VDD 0.3×VDD 0.5 0.4 4.6 3.1 ±2.5 25.8 ±2 mA mA mA V V μA V V mA % mA % ±0.1 %/V OUT0 ~ OUT15 DC Test Circuit SDO SDO TA=-40~85°C TA=-40~85°C VDS=17.0V IOL=+1.0mA IOH=-1.0mA VDS=1.0V, REXT=6000Ω IOL=3.1mA, VDS=1.0V, REXT=6000Ω VDS=1.0V, REXT=720Ω IOL=25.8mA, VDS=1.0V, REXT=720Ω 3 0.7×VDD GND %/dVDS VDS=1.0~3.0V %/dVDD VDD=4.5~5.5V RIN(up) Pull-Down Resistor TEST CONDITIONS ±1.0 %/V 250 500 800 KΩ 250 500 800 KΩ IDD(off) 1 REXT=Open, OUT0 ~ OUT15 =Off 2 2.8 mA IDD(off) 2 REXT=1240Ω, OUT0 ~ OUT15 =Off 4 4.8 mA IDD(off) 3 REXT=620Ω, OUT0 ~ OUT15 =Off 6 6.8 mA IDD(on) 1 REXT=1240Ω, OUT0 ~ OUT15 =On 5.2 8.2 mA IDD(on) 2 REXT=620Ω, OUT0 ~ OUT15 =On 6.5 9.5 mA OE RIN(down) LE UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 4 of 12 QW-R102-071.a L16B45A Preliminary CMOS IC DC ELECTRICAL CHARACTERISTICS (VDD=3.3V) PARAMETER Supply Voltage Output Voltage VDS Output Current “H” Level “L” Level Output Leakage Current Input Voltage Output Voltage SYMBOL VDD SDO Output Current 1 Current Skew Output Current 2 Current Skew Output Current vs. Output Voltage Regulation Output Current vs. Supply Voltage Regulation Pull-Up Resistor IOUT IOH IOL VIH VIL IOH VOL VOH IOUT1 dIOUT1 IOUT2 dIOUT2 “OFF” Supply Current “ON” MIN 3.0 TYP 3.3 MAX 4.5 UNIT V 17.0 V 30 -1.0 1.0 VDD 0.3×VDD 0.5 0.4 2.9 3.1 ±2.5 25.8 ±2 mA mA mA V V μA V V mA % mA % ±0.1 %/V OUT0 ~ OUT15 DC Test Circuit SDO SDO TA=-40~85°C TA=-40~85°C VDS=17.0V IOL=+1.0mA IOH=-1.0mA VDS=1.0V, REXT=6000Ω IOL=3.1mA, VDS=1.0V, REXT=6000Ω VDS=1.0V, REXT=720Ω IOL=25.8mA, VDS=1.0V, REXT=720Ω 3 0.7×VDD GND %/dVDS VDS=1.0~3.0V %/dVDD VDD=3.0~3.6V RIN(up) Pull-Down Resistor TEST CONDITIONS ±1.0 %/V 250 500 800 KΩ 250 500 800 KΩ IDD(off) 1 REXT=Open, OUT0 ~ OUT15 =Off 1.7 2.3 mA IDD(off) 2 REXT=1851Ω, OUT0 ~ OUT15 =Off 3.9 4.5 mA OE RIN(down) LE IDD(off) 3 REXT=748Ω, OUT0 ~ OUT15 =Off 5.2 5.8 mA IDD(on) 1 REXT=1851Ω, OUT0 ~ OUT15 =On 3.9 5.0 mA IDD(on) 2 REXT=748Ω, OUT0 ~ OUT15 =On 5.2 5.8 mA UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 5 of 12 QW-R102-071.a L16B45A Preliminary CMOS IC SWITCHING ELECTRICAL CHARACTERISTICS (VDD=5.0V) PARAMETER CLK- OUT2n CLK- OUT2n + 1 Propagation Delay Time (“L” to “H”) LE- OUT2n LE- OUT2n + 1 OE - OUT2n OE - OUT2n + 1 CLK-SDO CLK- OUT2n CLK- OUT2n + 1 Propagation Delay Time (“H” to “L”) LE- OUT2n LE- OUT2n + 1 OE - OUT2n OE - OUT2n + 1 Pulse Width SYMBOL TEST CONDITIONS MIN tpLH1 tpLH2 tPLH3 tPLH tpHL1 tpHL2 tpHL3 VDD=5.0V, VDS=1.0V, VIH=VDD, VIL=GND Rext=930Ω, VL=4.5V, RL=162Ω, CL=10pF CLK-SDO CLK LE tpHL tw(CLK) tw(L) OE tw(OE) 70 th(L) tsu(L) th(D) tsu(D) tr tf tr, SDO tf, SDO tor tof 30 5 5 3 Hold Time for LE Setup Time for LE Hold Time for SDI Setup Time for SDI Maximum CLK Rise Time Maximum CLK Fall Time SDO Rise Time SDI Fall Time Output Rise Time of IOUT Output Fall Time of IOUT UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw TYP MAX UNIT 50 70 ns 35 55 ns 50 70 ns 35 55 ns 50 70 ns 35 55 ns 20 40 ns 90 110 ns 75 95 ns 90 110 ns 75 95 ns 90 110 ns 75 95 ns 20 40 ns ns ns 20 20 100 ns 10 10 40 55 ns ns ns ns ns ns ns ns ns ns 500 500 6 of 12 QW-R102-071.a L16B45A Preliminary CMOS IC SWITCHING ELECTRICAL CHARACTERISTICS (VDD=3.3V) PARAMETER CLK- OUT2n CLK- OUT2n + 1 Propagation Delay Time (“L” to “H”) LE- OUT2n LE- OUT2n + 1 OE - OUT2n OE - OUT2n + 1 CLK-SDO CLK- OUT2n CLK- OUT2n + 1 Propagation Delay Time (“H” to “L”) LE- OUT2n LE- OUT2n + 1 OE - OUT2n OE - OUT2n + 1 Pulse Width SYMBOL TEST CONDITIONS MIN tpLH1 tpLH2 tPLH3 tPLH tpHL1 tpHL2 tpHL3 VDD=3.3V, VDS=1.0V, VIH=VDD, VIL=GND Rext=930Ω, VL=3.0V, RL=100Ω, CL=10pF CLK-SDO CLK LE tpHL tw(CLK) tw(L) 20 20 OE tw(OE) 100 th(L) tsu(L) th(D) tsu(D) tr tf tr, SDO tf, SDO tor tof 30 5 5 3 Hold Time for LE Setup Time for LE Hold Time for SDI Setup Time for SDI Maximum CLK Rise Time Maximum CLK Fall Time SDO Rise Time SDI Fall Time Output Rise Time of IOUT Output Fall Time of IOUT UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw TYP MAX UNIT 50 70 ns 35 55 ns 50 70 ns 35 55 ns 50 70 ns 35 55 ns 20 40 ns 115 135 ns 100 120 ns 115 135 ns 100 120 ns 105 125 ns 90 110 ns 20 40 ns ns ns 130 ns 10 10 40 65 ns ns ns ns ns ns ns ns ns ns 500 500 7 of 12 QW-R102-071.a L16B45A Preliminary CMOS IC APPLICATION INFORMATION Constant Current To design LED displays, UTC L16B45A provides nearly no variations in current from channel to channel and from IC to IC. This can be achieved by: 1) The maximum current variation between channels is less than ±2.5%, and that between ICs is less than ±3%. 2) In addition, the current characteristic of output stage is flat and users can refer to the figure as shown below. The output current can be kept constant regardless of the variations of LED forward voltages (VF). This performs as a perfection of load regulation. Adjusting Output Current The output current of each channel (IOUT) is set by an external resistor, Rext. The relationship between IOUT and Rext is shown in the following figure. Also, the output current can be calculated from the equation: VR-EXT=1.24V; IOUT=VR-EXT*( 1/Rext )x15; Rext=(VR-EXT/IOUT)x15 where Rext is the resistance of the external resistor connected to R-EXT terminal and VR-EXT is the voltage of R-EXT terminal. The magnitude of current (as a function of Rext) is around 25mA at 744Ω and 10mA at 1860Ω. UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 8 of 12 QW-R102-071.a L16B45A Preliminary CMOS IC TEST CIRCUIT FOR DC ELECTRICAL CHARACTERISTICS IDD VDD VDD IIH, IIL IOUT OE CLK OUT0 LE OUT15 SDI R-EXT GND VDS SDO VIH, VIL Iref TEST CIRCUIT FOR SWITCHING ELECTRICAL CHARACTERISTICS UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 9 of 12 QW-R102-071.a L16B45A Preliminary CMOS IC TIMING DIAGRAM N=0 1 2 3 4 5 6 7 8 9 10 D8 D7 D6 D5 11 12 13 14 15 D2 D1 CLK D15 D14 D13 D12 D11 D10 D9 D4 D3 D0 SDI LE OE D0 OUT0 OFF ON OUT1 D1 OFF ON OUT2 D2 OFF ON OFF OUT3 ON D15 OUT15 OFF ON D15 SDO don’t care TRUTH TABLE CLK LE OE SDI OUT0 … OUT7 … OUT15 SDO H L Dn Dn …… Dn - 7 …. Dn - 15 Dn-15 L L Dn+1 No Change Dn-14 H L Dn+2 X L Dn+3 X H Dn+3 UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw Dn + 2 …… Dn - 5 …. Dn - 13 Dn + 2 …… Dn - 5 …. Dn - 13 Off Dn-13 Dn-13 Dn-13 10 of 12 QW-R102-071.a L16B45A Preliminary CMOS IC TIMING WAVEFORM tW(OE OE 50% 50% tPLH3 tPHL3 90% 50% 10% OUTn tof UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 90% 50% 10% tor 11 of 12 QW-R102-071.a L16B45A Preliminary CMOS IC EQUIVALENT CIRCUITS OF INPUTS AND OUTPUTS OE LE terminal terminal VDD IN VDD IN CLK, SDI terminal VDD IN SDO terminal VDD OUT 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 12 of 12 QW-R102-071.a