LP3936 is a complete lighting management system designed for portable wireless applications. It contains a boost DC/DC converter, 4 white LED drivers to drive the main LCD panel backlight, 2 white LED drivers for sub-LCD panel and 1 set of RGB LED drivers. Both WLED groups have 8-bit programmable constant current drivers that are separately adjustable and matched to 1% (typ.). For efficient backlighting the backlight intensity can be adjusted using the 8-bit ADC with ambient light detection circuit. The RGB LED drivers are PWM-driven with programmable color, intensity and blinking patterns. In addition, they feature a FLASH function to support picture taking with camera- enabled cellular phones. An efficient magnetic boost converter provides the required bias operating from a single Li-Ion battery. The DC/DC con- verter output voltage is user programmable for adapting to different LED types and for efficiency optimization. All func- tions are software controllable through an I2C and MicroWire/SPI compatible interface and 16 internal regis- ters.
The LP3936 is a complete lighting management system designed for portable wireless applications. It integrates a magnetic boost DC‑DC converter, multiple white LED drivers, and PWM‑controlled RGB LED drivers with programmable color, intensity, and flash functions. All functions are software‑controllable via I²C or MicroWire/SPI interfaces.
The document provides detailed pin descriptions, absolute maximum ratings, electrical characteristics, operation modes, recommended external components, and package dimensions, along with compliance and support information.
| Boost converter output current | 250 mA |
|---|---|
| White LED driver current per LED | 0 … 25 mA |
| Ambient light sensor ADC resolution | 8‑bit |
| Package type | 32‑Lead Thin CSP, 4.5 × 5.5 × 0.8 mm, 0.5 mm pitch |
| Supply voltage range (Vppi2) | 3.0 V – 6.0 V |
| Boost output default voltage | 4.55 V |
| Digital interface low voltage | 1.8 V |
It uses a 32‑lead thin CSP package measuring 4.5 × 5.5 × 0.8 mm with a 0.5 mm pitch.
Each white LED driver can be programmed up to 25 mA per LED, with a total of 250 mA for the group.