HM5669 Overview
Description
HM5669 develops a step-up DC/DC converter that delivers an accurate constant current for driving LEDs. Operating at a fixed switching frequency of 1MHz allows the device to be used with small value external ceramic capacitors and inductor.
Key Features
- Input voltage range: 2.8 to 30V
- Switch current limit: 4A
- Drives LED strings up to 30V
- 1MHz fixed frequency minimizes the external components
- 20kHz~1MHz wide dimming frequency range for EN/PWM pin
- Internal softstart limits the inrush current
- Open LED over voltage protection
