IS31FL3235A
DESCRIPTION
IS31FL3235A is prised of 28 constant current channels each with independent PWM control, designed for driving LEDs, PWM frequency can be 3k Hz or 22k Hz. The output current of each channel can be set at up to 38m A (Max.) by an external resistor and independently scaled by a factor of 1, 1/2, 1/3 and 1/4. The average LED current of each channel can be changed in 256 steps by changing the PWM duty cycle through an I2C interface. The chip can be turned off by pulling the SDB pin low or by using the software shutdown feature to reduce power consumption. IS31FL3235A is available in QFN-36 (4mm × 4mm) package. It operates from 2.7V to 5.5V over the temperature range of -40°C to +85°C.
TYPICAL APPLICATION CIRCUIT
April 2024
FEATURES
- 2.7V to 5.5V supply
- I2C interface, automatic address increment function
- Internal reset register
- Modulate LED brightness with 256 steps PWM
- Each channel can be controlled independently
- Each channel can be scaled independently by 1,
1/2, 1/3...
