AF / 12. General Description. Features. Applications. Package. Pin. Configurations AF-V1.0. Analog Future

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1 16-channel constant current LED driver chip General Description The 5024 is a constant current driver chip which is designed for LED lighting and LED screen. The size of the drive urrent can be adjusted by an external resistor. (Current Iout = 3 ~ 50 milliampcs) The chip contains 16-bit shift register, latch, the benchmark power and constant current drive circuit. The chip use a BCD process. Features Constant current output range: 3~50mA (external resistor) Fast response of output current, the min/ OE: 80 ns Open the wrong time to reduce the transient voltage fluctuations Maximum operating frequency: 30 MHz 5V /3.3 V CMOS compatible levels and Schmitt Trigger input Precision drive current match: Bit to Bit: <± 5.0% Chip to Chip : <± 6.0% Package: SSOP / SSOP /SSOP / QFN24-4*4 Applications LED lighting LED screen Package Marking and Ordering Information Device Marking Device Device Package SSOP24-1.0/SSOP /SSOP /QFN24-4*4 Pin Configurations 5024 SSOP24-1.0/0.635/0.65 QFN24-4*4 1 / 12

2 Pin Description SSOP24-1.0/0.635/0.65 PIN NUM PIN NAME 1 GND 2 SERIAL-IN 3 CLOCK 4 LATCH 5~20 OUT0~15 21 ENABLE 22 SERIAL-OUT 23 R-EXT 24 VDD PIN FUNCTION GND Serial data input Input clock Internal data latch signal Output driver Output enable signal (active low) Serial data output External resistor connection pin VDD QFN24-4*4 PIN NUM PIN NAME 1 SDO 2 R-EXT 3 VDD 4 LATCH 5 SDI 6 CLOCK 7 LE 8~23 OUT0~15 24 OE PIN FUNCTION Serial data output External resistor connection pin VDD Internal data latch signal Serial data input Input clock Internal data latch signal Output driver Output enable signal (active low) Chip functional block diagram 2 / 12

3 Timing diagram Input and output pin equivalent circuit 3 / 12

4 ABSOLUTE MAXIMUM RATINGS (TA = 25 ) Parameter Value Unit V DD Supply voltage 0~7.0 V V IN Input voltage -0.4~ V DD+0.4 V I OUT Output current 50 ma VOUT Output Voltage -0.5~+24 V fclk Clock frequency 30 MHZ IGND Ground current 1600 ma PD Power Dissipation (TC = 25 C) W Rth(j-a) Thermal resistance /W Tstg Operating and Storage Temperature Range -55 to +150 Electrical Characteristics (T C = 25 ) DC Electrical Characteristics VDD=5V Parameter Test Conditions Min. Typ. Max. Unit VIH Input High Voltage V VIL Input Low Voltage GND 1.5 V I OH Output Leakage Current V DS= 18V, µa V OH Output Voltage ( S - OUT) IOH = -1.0mA 4.6 V VOL IOL = 1.0mA 0.4 V I OL1 Output drive current(bit to bit) V DS=1.0V, REXT = 1100Ω ma di OL1 Output drive current offset V DS=1.0V,I OL=15mA REXT=1100Ω 5 % I OL2 Output drive current(chip to chip) V DS=1.0V, REXT = 400Ω ma diol2 Output drive current offset VDS=1.0V,IOL=30mA REXT=400Ω 6 % Output drive current change Vs %/VDD Supply voltage REXT=1100Ω, Tamb =-40 ~ 85 C 1 %/V RIN(up) Output Capacitance KΩ RIN(down) Reverse Transfer Capacitance KΩ IDD(off)1 Power supply current REXT=OPEN, OUT0~15 = off 3 5 ma IDD(off)2 (Output driver off) REXT=400Ω, OUT0~15 = off 6 15 ma Power supply current IDD(on) REXT=400Ω, OUT0~15 = on (Output driver on) 6 15 ma 4 / 12

5 Dynamic characteristic VDD=3.3V Parameter Test Conditions Min. Typ. Max. Unit. tplh Delay time(low To CLOCK-OUT ns high electricity Level) LATCH-OUT ns ENABLE-OUT ns CLOCK-SERIAL_OUT ns tphl Delay time(high To CLOCK-OUT ns Low electricity Level) LATCH-OUT ns ENABLE-OUT0 VDD=3.3V ns CLOCK-SERIAL_OUT VIH=VDD ns tsteup SERIAL_IN the set-up time VIL=GND 5 ns thold SERIAL_IN the hold time REXT=1kΩ 5 ns tsteup(l) LATCH the set-up time VL=3V 10 ns thold(l) LATCH the hold time RL=100Ω 10 ns tgd1 Group1-Group2 CL=10pF 20 ns tgd2 Channel to Group1-Group3 40 ns tgd3 open the wrong time Group1-Group4 60 ns twclk CLOCK 25 ns twlatch Pulse width LATCH 25 ns twen ENABLE 120 ns tor Drive the output voltage rise time 30 ns tof Drive the output voltage fall time 75 ns Test Circuit DC characteristics 5 / 12

6 AC Characteristics AC timing diagram 6 / 12

7 System application examples Output drive current (IOUT) Resistor to set the current value, specifically the following formula Iout=1.22/Rext*15.5 LED drive voltage setting (VLED) VLED = VCE ( Tr Vsat ) + Vf ( LED forward voltage ) + VO ( IC supply voltage) In the relatively high VLED-voltage conditions, in order to reduce the power consumption of the chip, a resistor R in series so that the VOUT value lower 7 / 12

8 Package Drawing SSOP Dimensions(unit unit:mm mm) Min Max Min Max A C A C4 0.8TYP A2 1.00TYP D 0.95TYP A3 0.8TYP D B R1 0.2TYP B R2 0.2TYP B2 7.62TYP Ø 1 8 TYP C 2.20 Ø 2 10 TYP C Ø 3 4 TYP C Ø 4 5 TYP 8 / 12

9 SSOP Dimensions(unit unit:mm mm) Min TYP Max Min TYP Max A 1.77 E A E A e TYP A L b L1 1.05TYP b Ø 0 8 c c D / 12

10 SSOP Dimensions(unit unit:mm mm) Min TYP Max Min TYP Max A 1.90 E A E A e 0.65TYP A L b L1 1.30TYP b Ø 0 8 c c D / 12

11 QFN *4 4*4 11 / 12

12 RESTRICTIONS ON PRODUCT USE The information contained herein is subject to change without notice. AF Microelectronics Co., Ltd. exerts the greatest possible effort to ensure high quality and reliability. Nevertheless, semiconductor devices in general can malfunction or fail due to their inherent electrical sensitivity and vulnerability to physical stress. It is the responsibility of the buyer, when utilizing AF products, to comply with the standards of safety in making a safe design for the entire system, including redundancy, fire-prevention measures, and malfunction prevention, to prevent any accidents, fires, or community damage that may ensue. In developing your designs, please ensure that AF products are used within specified operating ranges as set forth in the most recent AF products specifications. The AF products listed in this document are intended for usage in general electronics applications (personal equipment, office equipment, domestic appliances, etc.). These AF products are neither intended nor warranted for usage in equipment that requires extraordinarily high quality and/or reliability or a malfunction or failure of which may cause loss of human life or bodily injury ( Unintended Usage ). Unintended Usage include atomic energy control instruments, airplane or spaceship instruments, transportation instruments, traffic signal instruments, combustion control instruments, medical instruments, all types of safety devices, etc.. Unintended Usage of AF products listed in this document shall be made at the customer s own risk. AF is not responsible for any problems caused by circuits or diagrams described herein whose related industrial properties, patents, or other rights belong to third parties. The application circuit examples explain typical applications of the products, and do not guarantee the success of any specific mass-production design. 12 / 12