IRS25401SPBF

The IRS25401SPBF is a high voltage high frequency buck control IC for constant LED current regulation. It incorporates a continuous mode time-delayed hysteretic buck regulator to directly control the average load current, using an accurate on-chip band-gap voltage reference. This part directly replaces the IRS2540 and IRS2541 with improved latch-up immunity. The application is inherently protected against short circuit conditions, with the ability to easily add open-circuit protection. An external high-side bootstrap circuit drives the buck switching element at high frequencies. A low-side driver is also provided for synchronous rectifier designs.

• Auto restart, non-latched shutdown
• PWM dimming
• ±2% Voltage reference
• 140ns Dead-time
• 15.6V Zener clamp on VCC
• Up to 500kHz frequency
• <lt/>500μA Micropower start-up

Pritaikymas

LED Lighting