Infineon Technologies ICE5QR1680BGXUMA1

Overview

ICE5QR1680BGXUMA1 from Infineon is a quasi-resonant 800 V CoolSET™ integrated power IC combining a digital PWM controller and avalanche-rugged CoolMOS™ in a single DSO-12 package. It delivers 50 W at 220 VAC ±20% and 27 W across 85–300 VAC, features <100 mW standby power via selectable Active Burst Mode, and integrates digital frequency reduction up to 10 zero crossings for EMI suppression in offline flyback converters used in TV and white goods auxiliary supplies.

For engineers reviewing the ICE5QR1680BGXUMA1 datasheet, ICE5QR1680BGXUMA1 pinout, ICE5QR1680BGXUMA1 application, or ICE5QR1680BGXUMA1 equivalent, key selection criteria include its 1.53 Ω R_DS(on), 800 V drain-source rating, cascode-based fast startup, robust line OVP/brownout protection, and digital soft-start implementation - all validated for high-efficiency, low-noise AC/DC auxiliary power designs.

Technical Context

The device implements a current-mode quasi-resonant flyback controller with integrated 800 V CoolMOS™, using digital zero-crossing detection with up/down counter logic to dynamically adjust switching frequency based on input voltage (low/high line) and load conditions. Its proprietary ringing suppression time control determines switch-on timing to minimize switching losses and audible noise.

Protection architecture includes cycle-by-cycle current limiting, auto-restart for VCC over/under-voltage, output overvoltage, overload/open-loop, and junction temperature monitoring with hysteresis. The VCC supply operates from 10–25.5 V, enabling stable biasing across wide input ranges without external LDO.

Key Specifications

Pinout & Package

ICE5QR1680BGXUMA1 is housed in PG-DSO-12 (12-pin exposed pad) package with four parallel DRAIN pins for thermal and current handling, two NC pins, and dedicated analog sensing/control pins optimized for quasi-resonant flyback layout.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ICE5QR2280BGXUMA1 and ICE5QR0680BGXUMA1, ICE5QR1680BGXUMA1 provides optimal balance of output power (50 W), thermal performance, and board space for mid-range TV and white goods auxiliary supplies - avoiding overdesign while ensuring margin for 85–300 VAC operation.

Availability

ICE5QR1680BGXUMA1 is available at Aetrix Electronics and suitable for TV auxiliary power supply, white goods control board, and set-top box power module applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant manufacturing.

Supply support for ICE5QR1680BGXUMA1 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 leadership in silicon carbide and CoolMOS™ technologies.

The CoolSET™ product line targets highly integrated, high-voltage AC/DC controllers for offline flyback converters - designed to reduce bill-of-materials, improve reliability, and accelerate time-to-market for auxiliary power systems.

FAQ

What is the maximum continuous output power supported by ICE5QR1680BGXUMA1?

ICE5QR1680BGXUMA1 supports up to 50 W at 220 VAC ±20% and 27 W across 85–300 VAC in an open-frame design with 2 oz copper PCB and Ta = 50°C. Actual output depends on transformer design, heatsinking, and ambient conditions - Infineon recommends thermal simulation and prototype validation for target applications.

Does ICE5QR1680BGXUMA1 require an external startup resistor?

No. ICE5QR1680BGXUMA1 uses ZCD pin-based cascode startup to charge the VCC capacitor directly from the DRAIN node during initial power-up, eliminating the need for an external high-voltage startup resistor and associated power loss.

How does the digital frequency reduction feature improve system performance?

Digital frequency reduction adjusts switching frequency across up to 10 zero crossings to maintain quasi-resonant operation at light loads, reducing switching losses and electromagnetic interference while preventing audible noise from variable-frequency operation - verified in Infineon's reference designs for TV auxiliary supplies.

Can ICE5QR1680BGXUMA1 be used in non-isolated buck-derived topologies?

No. ICE5QR1680BGXUMA1 is specifically designed for isolated quasi-resonant flyback converters with transformer-coupled feedback. Its protection functions, ZCD sensing, and gate drive architecture assume transformer isolation and cannot be safely applied to non-isolated buck, buck-boost, or forward topologies.