IS32BL3554 Description
The IS32BL3554 is a white LED driver for backlight applications based on a highly efficient boost controller operating over a wide input voltage range of 4.5V to 33V. The IS32BL3554 contains four regulated current sources with 1.5% (Typ.) current matching between strings for a uniform LED brightness. Each current source can be programmed via an external resistor to drive from 20mA to 180mA.
IS32BL3554 Key Features
- Input voltage range: 4.5V to 33V
- 4-Channel LED current sinks, 180mA per string
- LED current adjustable from 20mA to 180mA
- String-to-string current matching accuracy: 1.5%
- Adjustable operating frequency: 100kHz to 1MHz
- External PWM dimming
- High contrast ratio
- Less than 3µA shutdown current
- Programmable soft-start
- Built-in protection features