Infineon Technologies IR1150PBF

Overview

IR1150PBF from Infineon Technologies is a continuous conduction mode (CCM) boost-type power factor correction (PFC) control IC implementing proprietary One Cycle Control (OCC), eliminating line voltage sensing, supporting 50–200 kHz programmable switching frequency, and delivering <200 µA sleep-mode current. It targets AC-DC front-end stages in industrial SMPS and LED drivers requiring EN61000-3-2 Class D compliance.

For engineers reviewing the IR1150PBF datasheet, IR1150PBF pinout, IR1150PBF application, or IR1150PBF equivalent, key selection considerations include its OCC-based current-loop architecture, OVP/EN dual-function pin behavior, 98% max duty cycle limit, integrated 1.5 A gate driver, and VCC UVLO thresholds (12.7 V turn-on / 10.7 V turn-off).

Technical Context

The IR1150PBF implements a two-loop control architecture: a fast inner current loop that shapes average input current without line voltage sensing-leveraging pulse-width dependency on instantaneous line voltage-and an outer voltage loop that regulates DC bus via VFB feedback to the transconductance error amplifier (gm = 40 µS). The OCC technique embeds line voltage information directly into the modulator ramp.

Protection is implemented at circuit level: ISNS pin monitors inductor current with –1.04 V peak-limit threshold and 350 ns blanking time; OVP/EN pin provides 105.5% VREF overvoltage detection with 450 mV hysteresis and enables micropower sleep mode below 0.62 V; brownout and output undervoltage (51% VREF) are independently monitored.

Key Specifications

Pinout & Package

IR1150PBF is housed in an 8-lead SOIC package (body width 3.9 mm, thermal resistance R_θJA = 128 °C/W), with pins arranged as standard industry SOIC-8 layout and COM referenced to PCB ground plane.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar PFC controller applications.

Compared with UCC28070PW and FAN6300MX, the IR1150PBF uniquely combines OCC-based line-voltage-free control, programmable frequency, and micropower sleep-making it optimal for mid-power (300–600 W), space-constrained, and energy-compliant designs where simplicity and reliability are prioritized over interleaving or ultra-low THD.

Availability

IR1150PBF is available at Aetrix Electronics and suitable for industrial AC-DC power supplies, LED driver front-ends, and server PSU front-ends requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for IR1150PBF 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 9001 and IATF 16949.

The IR1150PBF belongs to Infineon's µPFC family-designed specifically for cost-effective, high-reliability CCM boost PFC in industrial and commercial power conversion where reduced design time and component count are critical.

FAQ

What is the purpose of the OVP/EN pin beyond overvoltage protection?

The OVP/EN pin serves a dual function: it triggers overvoltage shutdown at 105.5% VREF, and when pulled below 0.62 V (typ), it forces the IC into micropower sleep mode with total supply current ≤200 µA. This enables compliance with Energy Star and Blue Angel standby power standards without external logic.

How does One Cycle Control eliminate the need for line voltage sensing?

One Cycle Control embeds line voltage dependency directly into the modulator's duty cycle calculation using the relationship between instantaneous input voltage and required current reference. The inner current loop uses this intrinsic correlation-rather than a separate sensed line signal-to maintain sinusoidal input current, reducing component count and noise susceptibility.

What is the minimum off-time specification and why does it matter?

The IR1150PBF specifies a minimum off-time of 300 ns (typ) across its 50–200 kHz frequency range. This parameter ensures reliable MOSFET turn-off under high-duty-cycle conditions near peak line voltage, preventing shoot-through and maintaining stable CCM operation across universal AC inputs.

Can the IR1150PBF drive a 600 V MOSFET directly?

Yes-the IR1150PBF integrates a 13 V-clamped, ±1.5 A peak gate driver capable of directly driving standard 600 V superjunction MOSFETs (e.g., IPW60R041P7) in boost PFC topologies. For higher gate charge devices or faster switching, external buffer stages may be added, but are not required for typical 300–500 W designs.