IRS25411SPBF
Overview
IRS25411S - LED Buck Regulator Control IC
The IRS25411S is a high voltage, high frequency buck control ic for constant LED current regulation. The IRS25411S incorporates a continuous mode time-delayed hysteretic buck regulator to directly control the average load current, using an accurate on-chip bandgap voltage reference. The application is inherently protected against short circuit conditions, with the ability to easily add open-circuit protection. An internal high-side bootstrap circuit drives the buck switching element at high frequencies. A low-side driver is also provided for sychronous rectifier designs. All functions are relaized with a simple 8-pin SOIC package.
Summary of Features
- 600V Half-Bridge Driver
- Micropower Start-Up (<500 microamperes)
- +/-2% voltage reference
- 140 ns deadtime
- 15.6 V zener clamp on Vcc
- Frequency up to 500 kHz
- Auto restart, non-latched shutdown
- PWM dimmable
- 8-pin SOIC Package
Potential Applications
- LED drivers for lamp replacement
- LED driver back end current regulator
Support
