Infineon Technologies ICE5QR0680BGXUMA1

Overview

ICE5QR0680BGXUMA1 from Infineon is a quasi-resonant 800 V integrated power IC combining a digital PWM controller and avalanche-rugged CoolMOS™ in a single DSO-12 package. It delivers up to 77 W at 220 VAC ±20% and 42 W across 85–300 VAC, achieves <100 mW standby power via enhanced Active Burst Mode, and features digital frequency reduction up to 10 zero crossings for EMI suppression - deployed in auxiliary power supplies for TVs and home appliances.

For engineers reviewing the ICE5QR0680BGXUMA1 datasheet, ICE5QR0680BGXUMA1 pinout, ICE5QR0680BGXUMA1 application, or ICE5QR0680BGXUMA1 equivalent, key selection criteria include its 0.71 Ω R_DS(on), cascode-based fast startup, integrated line OVP/brownout protection, and programmable burst entry/exit thresholds for adaptive low-power operation.

Technical Context

This device implements a digitally controlled quasi-resonant flyback topology with cycle-by-cycle current limiting, built-in soft-start, and ringing suppression logic that determines switch-on timing based on zero-crossing detection and minimum ZC count setting. Its dual-chip cascode architecture separates the controller and 800 V CoolMOS™ die within one PG-DSO-12 package.

The IC supports digital frequency reduction via an up/down counter synchronized to zero crossings, enables selectable Active Burst Mode entry/exit via FB pin voltage thresholds, and provides auto-restart protection for VCC over/under-voltage, output overvoltage, overload/open-loop, and junction temperature exceeding 150°C.

Key Specifications

Pinout & Package

Package: PG-DSO-12 (12-pin exposed-pad SOIC variant with integrated heatsink pad; pin 1 marked by dot, pin 12 opposite corner).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar quasi-resonant flyback controller applications.

Compared with ICE5QR1680BG and ICE5QR2280BG, ICE5QR0680BG offers the lowest R_DS(on) (0.71 Ω) and highest output power (77 W), making it optimal for high-density auxiliary supplies requiring maximum efficiency at full load and ultra-low standby consumption.

Availability

ICE5QR0680BGXUMA1 is available at Aetrix Electronics and suitable for TV auxiliary power supplies, home appliance control boards, and PC/server standby PSUs requiring stable component supply, long-term lifecycle support, and RoHS-compliant manufacturing.

Supply support for ICE5QR0680BGXUMA1 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 AG is a German semiconductor manufacturer specializing in power management, automotive, and industrial control ICs, with global R&D and wafer fabrication infrastructure.

The ICE5QRxx80BG series belongs to Infineon's CoolSET™ family - designed specifically for high-efficiency, low-EMI quasi-resonant flyback converters in consumer and industrial auxiliary power applications.

FAQ

What is the maximum continuous output power achievable with ICE5QR0680BGXUMA1?

The ICE5QR0680BGXUMA1 delivers up to 77 W at 220 VAC ±20% and 42 W across the full 85–300 VAC universal input range, measured in an open-frame design with 2 oz copper single-sided PCB and minimum drain pin copper area. Actual output depends on transformer design, heatsinking, and ambient temperature - Infineon recommends thermal derating above 50°C ambient.

How does the Active Burst Mode achieve <100 mW standby power?

Active Burst Mode reduces switching activity during light/no-load conditions by pausing PWM pulses and entering low-power sleep cycles. Entry and exit thresholds are set via FB pin voltage, and internal digital control ensures minimal quiescent current draw - achieving <100 mW total system standby power while maintaining fast wake-up response.

Can ICE5QR0680BGXUMA1 operate without an external startup resistor?

Yes. The ZCD pin provides initial gate drive to charge the VCC capacitor during startup using transformer-induced voltage, eliminating the need for an external high-voltage startup resistor. This reduces component count, improves reliability, and accelerates turn-on time compared to traditional resistor-fed controllers.

What protections are implemented on the VIN pin?

The VIN pin integrates dual line-protection functions: input overvoltage protection triggers shutdown if rectified bus exceeds ~300 V, and brownout protection disables operation if bus drops below ~70 V. Both use the same external resistor divider, enabling single-point sensing without additional components or PCB traces.