IRS25411STRPBF, LED Lighting Drivers Hysteretic Buck LED Drvr

The IRS25411STRPBF from Infineon is a LED buck regulator control in 8 pin SOIC package. It 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 bandgap voltage reference. 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. Typical application includes LED drivers for lamp replacement and LED driver back end current regulator.

• 600V half bridge driver
• Micropower start-up (<500µA)
• 9V/7.5V VCC supply undervoltage positive/negative going threshold
• ±2% voltage reference
• 15.6V zener clamp on VCC
• Frequency up to 500KHz
• Auto restart, non-latched shutdown, PWM dimmable
• 0.5A/0.7A output source/sink short circuit pulsed current
• 50/30ns ton rise and toff fall time (typical)
• 140ns typical deadtime