IS32FL3726A 16-CHANNEL LED DRIVER June 2021 GENERAL DESCRIPTION FEATURES The IS32FL3726A is a serial shift-register-plus latch-type Output current capability and number of LED driver operating from a 3V to 5V supply. It is comprised outputs: 60mA 16 outputs of 16 constant-current open drain sinks designed for Current set with external resistor driving common anode LEDs. The output current value Constant current range: 5mA to 60mA can be set from 5mA to 60mA by using an external I = 45mA V = 3.3V OUT MAX CC resistor. As a result, all outputs will have virtually the IOUT MAX= 60mA VCC= 5V same current levels. This driver uses a high-speed 4-wire Current accuracy (All output on, I = 25.2mA) OUT serial interface of up to 30MHz to drive 16 constant - Bit to bit: < 5%. current outputs, a 16-bit shift register, a 16-bit latch and a 16-bit AND-gate circuit. Serial input data appears at the - Device to device: < 5%. --------------- 200mV LED Dropout at 25mA output OUTn channels after 16 clock cycles. Driving the Latch pin will load the 16-bit of shift-register data into the For common-anode LEDs 16-bit output latch to drive the LEDs ON or OFF. The Power supply voltage range, VCC= 3.0V to 5.5V Enable pin can be used as a PWM input to adjust the LED Serial and parallel data transfer rate: 30MHz brightness. The IS32FL3726A operates from a 3V to 5.5V (Max. cascade connection) supply, and is specified over the -40C to +125C Operating temperature range, -40C ~ +125C temperature range. Package: eTSSOP-24 AEC-Q100 Qualified APPLICATIONS Car display panel Ambient lighting Roof lighting Functional lighting TYPICAL APPLICATION CIRCUIT VBattery LDO VCC 3.3V OUT0 1 F 0.1 F OUT1 SERIAL-IN OUT2 ENABLE Micro Controller LATCH IS32FL3726A CLOCK SERIAL-OUT OUT13 R-EXT OUT14 RE XT 2k GND OUT15 Figure 1 Typical Application Circuit Lumissil Microsystems www.lumissil.com 1 Rev. B, 06/18/2021 IS32FL3726A TYPICAL APPLICATION CIRCUIT (CONTINUE) VBattery VBattery LDO LDO VCC VCC 3.3V 3.3V OUT0 OUT0 1 F 0.1 F 1 F 0.1 F OUT1 OUT1 SERIAL-IN SIN SERIAL-IN OUT2 OUT2 ENB ENB ENABLE ENABLE Micro IS32FL3726A IS32FL3726A LAT LAT Controller LATCH LATCH CLK 1 CLK 2 CLOCK CLOCK R-EXT OUT13 SERIAL-OUT OUT13 RE XT 2k R-EXT GND OUT14 OUT14 RE XT 2k SERIAL-OUT OUT15 GND OUT15 Figure 2 Typical Application Circuit (Serial Synchronization) Lumissil Microsystems www.lumissil.com 2 Rev. B, 06/18/2021