APW7228B Description
4 Channels 5.5V to 30V Input Voltage Supply Drive up to 68 (17x4) White LEDs The APW7228B is a high efficiency driver for 4 channels of LEDs. It contains an adjustable-frequency currentmode PWM step-up controller, a 5V linear regulator, dim- (3.5V/160mA Each) ming control circuit and eight regulated current source Current Match (Balance) ±1% (Typ.) circuit. Current Accuracy ±1% (Typ.) The APW7228B is capable of...
APW7228B Key Features
- 4 Channels
- 5.5V to 30V Input Voltage Supply
- Drive up to 68 (17x4) White LEDs
- Current Match (Balance) ±1% (Typ.)
- Current Accuracy ±1% (Typ.)
- Time Shift PWM Dimming Control
- Random Channel Selection for Dynamic Opera- mity effect of forward voltages variance in the LED stacks
- Adjustable Switching Frequency
- Protections
- String Open Circuit Detection