Infineon Technologies IR1167ASTRPBF

Overview

IR1167ASTRPBF from Infineon Technologies (formerly International Rectifier) is a secondary-side synchronous rectifier controller IC for flyback converters, supporting DCM/CrCM/CCM topologies with 200 V drain-sense capability, 500 kHz max switching frequency, 10.7 V gate drive clamp, and 40 ns turn-off propagation delay. It drives N-channel MOSFETs to replace Schottky diodes in high-efficiency AC-DC adapters.

For engineers reviewing the IR1167ASTRPBF datasheet, IR1167ASTRPBF pinout, IR1167ASTRPBF application, or IR1167ASTRPBF equivalent, key selection factors include differential drain-voltage sensing, anti-bounce logic, UVLO protection, 7 A sink current, and compatibility with Energy Star and CECP standby requirements.

Technical Context

The IR1167ASTRPBF implements zero-current-transition detection via differential V_DS sensing across the SR MOSFET, using dual comparators with programmable thresholds (V_TH1 = –7 mV to –23 mV, V_TH2 = –150 mV) and adaptive blanking (9–25 µs) to suppress noise-induced false triggering in noisy flyback environments.

Its gate driver delivers 2 A source / 7 A sink peak current with 10.7 V clamped high-side output, 40 ns turn-off delay, and 60 ns turn-on delay, enabling fast, robust switching of paralleled N-MOSFETs while maintaining <2.2 mA quiescent current and micropower start-up at 100–200 µA.

Key Specifications

Pinout & Package

IR1167ASTRPBF is housed in an 8-lead SOIC package (SOIC-8N), surface-mount compatible with standard reflow profiles and IPC-7351B land patterns.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar secondary-side synchronous rectifier controller applications.

Compared with UCC24612DR and SRK1001TR, IR1167ASTRPBF offers unique configurability via OVT and RMOT pins for noise-prone industrial flybacks, while maintaining best-in-class 40 ns turn-off delay and 10.7 V gate clamp for legacy MOSFET compatibility.

Availability

IR1167ASTRPBF is available at Aetrix Electronics and suitable for LCD TV power supplies, energy-efficient AC-DC adapters, and telecom SMPS requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for IR1167ASTRPBF 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 global semiconductor leader specializing in power management, automotive, and industrial control solutions, with core expertise in high-voltage analog and mixed-signal ICs.

The IR1167(A,B)S product line was developed specifically for high-efficiency secondary-side synchronous rectification in isolated flyback converters targeting Energy Star, CECP, and DoE Level VI compliance.

FAQ

What is the function of the OVT pin on IR1167ASTRPBF?

The OVT (Overvoltage Threshold) pin adjusts the hysteresis of the V_DS comparator: when left floating, it sets V_TH1 to –10.5 mV; when tied to V_CC, it shifts to –15 mV. This allows designers to tune noise immunity in high-dV/dt environments like telecom SMPS without changing external components.

Can IR1167ASTRPBF drive multiple paralleled MOSFETs?

Yes - its 7 A peak sink and 2 A source gate drive current, combined with low 0.7 Ω pull-down resistance, supports driving multiple N-channel MOSFETs in parallel. Layout must minimize shared source inductance to preserve ZCS timing accuracy across devices.

How does IR1167ASTRPBF achieve sub-1 W standby power?

It achieves sub-1 W standby via 2.2 mA quiescent current, micropower start-up (100–200 µA), and sleep mode (150–200 µA with EN=0V). No auxiliary bias winding is required, as V_CC is self-generated from the output winding during regulation.

Is IR1167ASTRPBF pin-compatible with IR1167BSTRPBF?

Yes - both share identical SOIC-8 pinout and functional block diagram. The only difference is gate drive clamp voltage: IR1167ASTRPBF uses 10.7 V, while IR1167BSTRPBF uses 14.5 V. Select based on MOSFET V_GS(th) and desired margin against gate overvoltage.