VAS1261A——60V/1.2A LED Driver with Precise PWM dimming
General Description The VAS1261A is a continuous mode inductive step-down converter, designed for driving single or multiple series connected LEDs efficiently from a voltage source higher LED Prolight, MR16, AR111, Smart Light
than the LED voltage. The device operates from an input supply between 5V and 60V, and provides an externally adjustable output current of up to 1.2A. The VAS1261A is capable with PWM dimming and drivers the output switch to achieve high precise PWM dimming especially when the light is low. It uses an external resistor to set the nominal average output current. The device operates over the -40°C to +85°C temperature range and is available in SOP8-e package.Application
Features
- Simple low parts count
- Internal 60V NMOS switch
- 1.2A output current
- PWM dimming
- High efficiency (up to 97%)
- Wide input voltage range: 5V to 60V
- Over Temperature protection
- Up to 1MHz switching frequency
- Inherent open-circuit LED protection
- Typical 5% output current accurac
