IRS25401SPBF

Overview

The IRS25401SPBF is a high-voltage, high-frequency buck control IC designed for constant LED current regulation. It incorporates a continuous mode time-delayed hysteretic buck regulator to directly control average load current using an accurate on-chip bandgap voltage reference. This component features a 200 V half bridge driver and supports PWM dimming capabilities. It operates with a free-running frequency up to 500 kHz and includes a micropower startup circuit consuming less than 500 μA. The device offers ±2% voltage reference accuracy and a 140 ns deadtime.

Feature Summary

• Integrates a continuous mode time-delayed hysteretic buck regulator for direct average load current control
• Features a 200 V half bridge driver suitable for high-voltage applications
• Supports PWM dimmable operation for precise light output adjustment
• Includes auto restart and non-latched shutdown protection mechanisms

Applications

• LED drivers for lamp replacement
• LED driver back end current regulator

Procurement Notes

Verify the package type matches the required PCB footprint, as this part is available in 8-Lead SOIC configurations. Confirm that the 200 V rating aligns with the specific circuit design requirements. Ensure compatibility with the intended switching frequency range up to 500 kHz. Check for RoHS compliance status if environmental regulations apply to the final assembly process.

Selection Notes

Select this component for non-isolated LED driver applications requiring constant current regulation. It serves as a direct replacement for the IRS2540 and IRS2541 models with improved latch-up immunity. Consider its micropower startup feature for systems where standby power consumption is critical. Evaluate the 140 ns deadtime against the switching speed requirements of the external MOSFETs used in the design.

Part Context

This IC belongs to the IRS254 series from International Rectifier, now part of Infineon Technologies. The series comprises high-voltage buck control ICs tailored for solid-state lighting sectors. These components address the need for low-cost driver electronics for high-brightness LEDs. The IRS25401 specifically targets applications needing a 200 V rating, distinguishing it from the 600 V variant within the same family.

Replacement Considerations

The datasheet indicates that the IRS25401 directly replaces the IRS2540 and IRS2541 parts while offering improved latch-up immunity.