International Test Instruments Corporation IRS25401STRPBF

Overview

IRS25401STRPBF from Infineon is a 600 V half-bridge gate driver IC for current-regulated synchronous buck LED drivers, featuring 500 mA source / 700 mA sink drive strength, hysteretic current control via IFB pin (500 mV threshold), and SO8 package. It enables high-efficiency, non-isolated LED lighting systems operating up to 500 kHz with ZVS capability.

For engineers reviewing the IRS25401STRPBF datasheet, IRS25401STRPBF pinout, IRS25401STRPBF application, or IRS25401STRPBF equivalent, key selection criteria include bootstrap-recharge timing (tWD = 20 μs), dead time (140 ns), VCC UVLO thresholds (9.0 V turn-on, 7.5 V turn-off), and high-side floating bias compliance up to 600 V.

Technical Context

The IRS25401STRPBF implements a time-delayed hysteretic current regulation architecture, where output current is controlled by comparing sensed shunt voltage (VIFB) against an internal 500 mV bandgap reference. Switching transitions are governed by propagation delays (tHO-OFF/tLO-ON = 180–320 ns) and fixed 140 ns dead time to prevent shoot-through.

It integrates a bootstrap capacitor re-charge timer (tWD = 20 μs, tWDCH = 1.0 μs) that forces low-side conduction to replenish VB–VS charge, enabling reliable high-side gate drive without external timing circuitry. The IC operates only in continuous conduction mode (CCM) and requires no external oscillator.

Key Specifications

Pinout & Package

IRS25401STRPBF is housed in an SO8 (Small Outline, 8-pin) surface-mount package with standard 1.27 mm pitch and exposed thermal pad (RoHS-compliant, halogen-free).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar synchronous buck LED driver applications.

Compared with IRS25401STRPBF, IRS25411STRPBF adds slave-mode functionality for synchronized multi-phase operation, while MP6908GJ-Z offers higher design flexibility at the cost of increased component count and loss of integrated current regulation.

Availability

IRS25401STRPBF is available at Aetrix Electronics and suitable for street lighting drivers, industrial high-bay LED fixtures, UV-C disinfection modules, and architectural tunable-white systems requiring stable component supply and long-term production continuity.

Supply support for IRS25401STRPBF includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Infineon Technologies is a German semiconductor manufacturer specializing in power management, automotive, and industrial control ICs, with global manufacturing and quality certification to ISO/TS 16949 and IECQ QC 080000.

The IRS254xx family is designed specifically for high-voltage, current-regulated LED drivers in non-isolated buck topologies, emphasizing reliability, thermal robustness, and integration of bootstrap management and ZVS-enabling timing.

FAQ

What is the minimum recommended bootstrap capacitor value for IRS25401STRPBF?

The datasheet specifies a 0.1 µF ceramic capacitor rated for 25 V as the minimum recommended value for C_BOOT. This value ensures sufficient charge storage to sustain V_BS during worst-case duty cycles while maintaining low ESR and ESL for fast recharge. Larger values (e.g., 0.22 µF) improve margin under high-frequency or high-duty-cycle operation but require careful PCB layout to avoid resonance.

Can IRS25401STRPBF drive enhancement-mode GaN HEMTs?

Yes - IRS25401STRPBF's 500 mA source / 700 mA sink gate drive strength, 30 ns rise time, and 140 ns dead time meet typical requirements for 600 V-class GaN HEMTs. However, gate resistor selection must be optimized to limit dV/dt-induced ringing, and the bootstrap diode D_BOOT must have trr < 50 ns to prevent V_BS collapse during fast transitions.

How does the IFB pin RC filter affect performance?

The external RF and CF network at the IFB pin filters noise but introduces signal delay (t_RC), which directly impacts maximum achievable switching frequency and current ripple. Larger RC values increase filtering effectiveness but reduce bandwidth, leading to slower response and higher peak-to-peak current ripple - especially critical in high-dI/dt LED applications where tight regulation is required.

Is there a difference between IRS25401STRPBF and IRS25411STRPBF beyond part number?

Yes - IRS25411STRPBF adds slave-mode operation capability, allowing synchronization with a master controller for interleaved multi-phase designs. It also includes refined ZVS timing logic for improved light-load efficiency. All other electrical parameters, pinout, and package are identical, making IRS25411STRPBF a drop-in upgrade when advanced timing coordination is needed.