95180 PA5026 16-Bit Constant Current LED Sink Driver ANALOG PRODUCTS DIVISION DESCRIPTION FEATURES PA5026 contains a serial buffer and data latches which convert serial input data into parallel output format. At PA5026 output stage, sixteen regulated current ports are designed to provide uniform and constant current sinks for driving LED’s within a large range of Vf variations. 16-channel constant–current output. Output constant current: 2 - 80mA Current accuracy (All output ON) Between BITS ±1% Between IC’s ±1% Output Current 2~80mA adjustable Output current adjustable through an external PA5026 provides users with great flexibility and device performance in their system design for LED display applications, e.g. LED panels. resistor. Users may adjust the output current from 2 mA to 80 mA through an external resistor, Rext, which gives them the flexibility in controlling the light intensity of LED’s. Interleave time delay of output channel PA5026 guarantees a maximum of 17V at the output port. Fast response for output port (tr/td=50ns) The high clock frequency, 25 MHz, satisfies the system requirements of high volume data transmission. 25MHz clock frequency ORDERING INFORMATION Device No. Package PA5026P SSOP-24-300-1.0 PA5026S PA5026R SSOP-24-150-0.635 PA5026QN QFN-24 BLOCK DIAGRAM REXT 23 OE 21 OUT 0 OUT 1 5 6 ST 4 SDI 2 D CK CLOCK 20 1- Reg Q Q Q Q LE OUT 15 ST D D CK Q ST D D Q D 22 SERIAL -OUT CK 3 561 E Elliot Road.#175 Chandler, AZ 85225 Tel: (480)539-2900. Fax: (480)632-1715. www.protekanalog.com 95180. Rev.2. 09/09 Not for use in any life support systems. 1 PA5026 16-Bit Constant Current LED Sink Driver ANALOG PRODUCTS DIVISION 22 OUT 11 LE 4 21 OE SDO 4 21 OUT 10 OUT 0 5 20 OUT 15 R-EXT 5 20 OUT 9 OUT 1 6 19 OUT 14 VDD 6 19 OUT 8 OUT 2 7 18 OUT 13 7 18 OUT 7 OUT 3 8 17 GND SDI OUT 12 8 17 OUT 6 OUT 4 9 16 OUT 11 CLK 9 16 OUT 5 OUT 5 10 15 OUT 10 LATCH 10 15 OUT 4 OUT 6 11 14 OUT 9 OUT 0 11 14 OUT 3 OUT 7 12 13 OUT 8 OUT 1 12 13 OUT 2 PA5026P (SSOP-24-300-1.0) AND PA5026R (SSOP-24-150-0.635) SDO 3 19 OE LE 1 18 OE OUT0 2 17 OUT15 OUT1 3 16 OUT14 OUT2 4 15 OUT13 OUT3 5 14 OUT12 OUT4 6 13 OUT11 PA5026S (SSOP-24-150-0.635) PAD 12 SDO OUT10 22 VDD 3 21 CLK 20 REXT OUT 12 11 23 10 2 OUT9 OUT 15 OUT8 R-EXT OUT7 23 SDI 2 GND SDI 23 OUT 13 22 24 8 1 9 OUT 14 OUT6 VDD CLK 24 7 1 OUT5 GND 24 PIN CONFIGURATIONS PA5026QN (QFN-24) PIN DESCRIPTIONS PA5026QN 22 Pin Number PA5026P PA5026R 1 Pin Name Description PA5026S 7 GND Ground 23 2 8 SDI Shift register Data Input Pin 24 3 9 CLK Shift Register Clock Input Pin, 1 4 10 LATCH ENABLE 2~9 5~12 11~18 10~15 13~18 19~24 16~17 19~20 1~2 18 21 3 Data Strobe Input Pin, OUT0~OUT7 OUT8~OUT13 Output Port OUT14~OUT15 19 22 4 OE SDO 20 23 5 R-EXT 21 24 6 VDD Output Enable Shift Register Data Output Pin External Resistor Input Port Power Supply 561 E Elliot Road.#175 Chandler, AZ 85225 Tel: (480)539-2900. Fax: (480)632-1715. www.protekanalog.com 95180. Rev.2. 09/09 Not for use in any life support systems. 2 PA5026 16-Bit Constant Current LED Sink Driver ANALOG PRODUCTS DIVISION TIMING DIAGRAM N= 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 CLK SDI LE OE OFF ON OFF ON OUT0 OFF ON OUT1 OUT2 OFF ON OUT3 OFF ON OUT15 OFF ON SDO Don’t Care TRUTH TABLE CLK LE OE SDI H L DN DN…… DN-7…… DN-15 DN-15 L L DN+1 No Change DN-14 H L DN+2 DN…… DN-5…… DN-13 DN-13 X L DN+3 DN…… DN-5…… DN-13 DN-13 X H DN+3 Off DN-13 OUT0…OUT7…OUT15 561 E Elliot Road.#175 Chandler, AZ 85225 Tel: (480)539-2900. Fax: (480)632-1715. www.protekanalog.com 95180. Rev.2. 09/09 Not for use in any life support systems. SDO 3 PA5026 16-Bit Constant Current LED Sink Driver ANALOG PRODUCTS DIVISION MAXIMUM RATINGS Characteristic Symbol Rating Unit Supply Voltage VDD 0~7.0 V Input Voltage VIN -0.4~VDD + 0.4 V Output Current IOUT +90 Output Voltage VDS Clock Frequency FCLK 25 MHz GND Terminal Current IGND 1440 mA Power Dissipation (On PCB, Ta=25°C) Thermal Resistance (On PCB, Ta=25°C) -0.5~+17.0 CN – type 2.32 CNS – type 1.87 CD – type CF – type PD 2.51 2.12 CP – type 1.73 CPA – type 1.73 CN – type 53.82 CNS – type 66.74 CD– type CF – type Rth(j-a) 49.81 59.01 CP – type 72.43 CPA – type 72.43 mA V W °C/W Operating Temperature Topr -40~+85 °C Storage Temperature Tstg -55~+150 °C 561 E Elliot Road.#175 Chandler, AZ 85225 Tel: (480)539-2900. Fax: (480)632-1715. www.protekanalog.com 95180. Rev.2. 09/09 Not for use in any life support systems. 4 PA5026 16-Bit Constant Current LED Sink Driver ANALOG PRODUCTS DIVISION ELECTRICAL CHARACTERISTICS Characteristic Symbol Condition Min. Typ. Max. Unit Supply Voltage VDD - 2.5* 5.0 5.5 V Output Voltage VDS OUT0 ~ OUT15 - - 17.0 V IOUT DC Test Circuit 2 - 80 mA IOH SDO - - -1.0 mA IOL SDO - - 1.0 mA “H” level VIH Ta = -40~85ºC 0.8VDD - VDD V “L” level VIL Ta = -40~85ºC GND - 0.3VDD V IOH VOH=17.0V - - 0.5 μA VOL IOL=+1.0mA - - 0.4 V VOH IOH=-1.0mA 4.6 - - V Output Current Input Voltage Output Leakage Current Output Voltage SDO Output Current 1 IOUT1 VDS=0.6V Rext=720 Ω - 26.25 - mA Current Skew dIOUT1 IOL=26.25mA VDS=0.6V Rext=720 Ω - ±1 ±3 % Output Current 2 IOUT2 VDS=0.8V Rext=360 Ω - 52.5 - mA Current Skew dIOUT2 IOL=52.5mA VDS=0.8V Rext=360 Ω - ±1 ±3 % %/dVDS VDS within 1.0V and 3.0V - ±0.1 - %/V %/dVDD VDD within 4.5V and 5.5V - ±1 - %/V Output Current vs. Output Voltage Regulation Output Current vs. Supply Voltage Regulation Pull-up Resistor RIN(up) OE 250 500 800 KΩ Pull-down Resistor RIN(down) LE 250 500 800 KΩ “OFF” Supply Current “ON” IDD(off) 1 Rext=Open, OUT0 ~ OUT15 =Off - 7 12 IDD(off) 2 Rext=720 Ω, OUT0 ~ OUT15 =Off - 10 12 IDD(off) 3 Rext=360 Ω, OUT0 ~ OUT15 =Off - 12 15 IDD(on) 1 Rext=720 Ω, OUT0 ~ OUT15 =On - 10 18 IDD(on) 2 Rext=360 Ω, OUT0 ~ OUT15 =On - 12 20 mA * 2.5V min for RED LED only Green and Blue LED require up to 4.0V 561 E Elliot Road.#175 Chandler, AZ 85225 Tel: (480)539-2900. Fax: (480)632-1715. www.protekanalog.com 95180. Rev.2. 09/09 Not for use in any life support systems. 5 PA5026 16-Bit Constant Current LED Sink Driver ANALOG PRODUCTS DIVISION TEST CIRCUIT 24 VDD VIL+VIH 21 OE 3 CLK 4 LE RL OUT0 5 PA5026 SWMATRIX CL RL 2 20 OUT15 SDI 22 SDO R-EXT GND 23 1 CL VL CL Test conditions: for above figure Tamb=25C,VDD=VIH=3.3V and 5V,VOUT=O.7V,VIL=OV,REXT=49OΩ,VL=3.OV,RL=6OΩ,CL=IO.5pF SWITCHING CHARACTERISTICS Characteristic Propagation Delay Time (“L” to “H”) Propagation Delay Time (“H” to “L”) Symbol Condition Min. Typ. Max. Unit CLK - OUTn tpLH1 - 100 150 ns LE - OUTn tpLH2 - 100 150 ns OE - OUTn tpLH3 - 50 150 ns CLK - SDO 15 20 - ns CLK - OUTn tpL H tpHL1 - 50 100 ns LE - OUTn tpHL2 - 50 100 ns OE - OUTn tpHL3 - 20 100 ns CLK - SDO tpHL 15 20 - ns 20 - - ns 20 - - ns 200 - - ns CLK Pulse Width tw(CLK) LE tw(L) OE tw(OE) VDD=5.0 V VDS=0.8 V VIH=VDD VIL=GND Rext=300 Ω VL=4.0 V RL=52 Ω CL=10 pF Hold Time for LE th(L) 5 - - ns Setup Time for LE tsu(L) 5 - - ns Hold Time for SDI th(D) 10 - - ns Setup Time for SDI 5 - - ns Clock Frequency tsu( D) FCLK - - 25.0 MHz Maximum CLK Rise Time tr** - - 500 ns Maximum CLK Fall Time tf** - - 500 ns Output Rise Time of Vout (turn off) tor - 70 200 ns Cascade Operation 561 E Elliot Road.#175 Chandler, AZ 85225 Tel: (480)539-2900. Fax: (480)632-1715. www.protekanalog.com 95180. Rev.2. 09/09 Not for use in any life support systems. 6 PA5026 16-Bit Constant Current LED Sink Driver ANALOG PRODUCTS DIVISION Output Fall Time of Vout (turn on) - tof 40 120 ns TIMING WAVEFORM tW(CLK) CLK 50% tSU(D) SDI 50% 50% 50% th(D) 50% SDO 50% tpLH tpHL LE tW(L) 50% 50% th(L) tSU(L) LOW = OUTPUTS ENABLED OE HIGH = OUTPUTS OFF 50% OUTn LOW = OUTPUTS ON tpLH1, tpHL1 tpLH2, tpHL2 tW(OE) OE 50% 50% 90% 50% 10% OUTn 90% 50% 10% 561 E Elliot Road.#175 Chandler, AZ 85225 Tel: (480)539-2900. Fax: (480)632-1715. www.protekanalog.com 95180. Rev.2. 09/09 Not for use in any life support systems. 7 PA5026 16-Bit Constant Current LED Sink Driver ANALOG PRODUCTS DIVISION APPLICATION NOTE In LED applications, the PA5026 can maintain the current w i t h almost no variation, across different channels and chips. The maximum current accuracy between bits is ±3%, and between chips is ±6%. There is only one ground pin for signal ground, constant current source ground and power ground. We recommend adopting minimum inductance in layout to reduce the switch noise and chip faults. In order to prevent driver damage by over current, do not turn off the driver and scan the triode at the same time. The resistor should be placed near the R-EXT pin. The output current of each channel (IOUT) is set by an external resistor, Rext. The output current can be calculated from the equation: VR-EXT = 1.26V；IOUT = (VR-EXT / Rext ) x 15 where Rext is the resistance of the external resistor connected to REXT terminal and VR-EXT is the voltage of R-EXT terminal. The magnitude of current (as a function of Rext) is around 52.5mA at 360Ω and 26.25mA at 720Ω. ELECTRICAL CHARACTERISTIC CURVE Output Current – REXT Resistance IOUT- R-EXT 100 90 80 70 IOUT (mA) 60 50 40 30 20 10 0 0.1K 1K 10K REXT (Ω) 561 E Elliot Road.#175 Chandler, AZ 85225 Tel: (480)539-2900. Fax: (480)632-1715. www.protekanalog.com 95180. Rev.2. 09/09 Not for use in any life support systems. 8 PA5026 16-Bit Constant Current LED Sink Driver ANALOG PRODUCTS DIVISION PACKAGE OUTLINE AND DIMENSIONS (Measurements shown in mm) SSOP-24-150-0.635 FOR PA5026S AND THE PA5026R 3.9O± O.2O 6.OO±O.2O O.65 ± O.15 0.25 Pin 24 Pin 1 0.635 1.45± O.2O 0.30 0.18± O.1O 1.57± O.2O 8.65±0.20 PACKAGE OUTLINE AND DIMENSIONS SSOP-24-300- 1.00 FOR PA5026P 0.25 6.O ± O.2O 8.OO±O.2O O.65 ± O.15 Pin 24 Pin 1 1.0 1.45± O.2O 0.40 0.18± O.1O 1.87± O.2O 13.0 ±0.20 561 E Elliot Road.#175 Chandler, AZ 85225 Tel: (480)539-2900. Fax: (480)632-1715. www.protekanalog.com 95180. Rev.2. 09/09 Not for use in any life support systems. 9 PA5026 16-Bit Constant Current LED Sink Driver ANALOG PRODUCTS DIVISION PACKAGE OUTLINE AND DIMENSIONS QFN-24 FOR PA5026QN Recommended Pad Layout Tape and Reel Specifications Reel Dia 178 (7”) A0 B0 K0 D E F W P0 P2 P tmax 4.10±0.10 4.10±0.10 0.85±0.10 1.50±0.10 1.75±0.10 3.50±0.05 12.00±0.30 4.00±0.10 2.00±0.05 4.00±0.10 0.25 P0 D t P2 10 Pitches Cumulative Tolerance on Tape± 0.2 E Pin 1 indicated by Dot Top cover tape A0 F W K0 B0 P 561 E Elliot Road.#175 Chandler, AZ 85225 Tel: (480)539-2900. Fax: (480)632-1715. www.protekanalog.com 95180. Rev.2. 09/09 Not for use in any life support systems. 10