LP3944 RGB/White/Blue 8-LED Fun Light Driver is an LED driver chip launched by Infineon. It integrates 8-channel LED driver circuits and an internal precision oscillator, which can independently drive 8 LEDs and support PWM dimming.
The LP3944 integrates an 8‑channel LED driver with an internal precision oscillator and I²C/SMBus interface. Two prescaler and two PWM registers allow independent control of duty cycle and frequency for each LED, enabling dimming and flashing patterns while minimizing bus traffic.
Typical applications include indicator lamps, general‑purpose I/O expansion, and decorative lighting for cellular phones, toys, and digital cameras. The device operates from a 2.3 V–5.5 V supply and provides up to 25 mA per LED pin (200 mA total).
| LED channels | 8 open‑drain outputs |
|---|---|
| Maximum LED current per pin | 25 mA |
| Total package current | 200 mA |
| Power dissipation | 1.76 W |
| Package | SQA24C (SQAZ24C) |
Each LED pin can source up to 25 mA, with a total package limit of 200 mA.
Hold the RST pin low for the required reset pulse width (TW) to put the device into reset; release it high to resume normal operation.
The device uses an I²C/SMBus interface with SCL and SDA pins for register access.