Infineon Technologies ICE2QR1080GXUMA1

Overview

ICE2QR1080GXUMA1 from Infineon is a quasi-resonant AC-DC controller IC integrating an 800 V avalanche-rugged CoolMOS™ transistor in a PG-DSO-12 package, delivering 45 W at universal input (85–265 VAC), featuring active burst mode (<100 mW no-load standby), digital frequency reduction, and built-in soft-start - deployed in Blu-ray players, set-top boxes, and auxiliary power supplies for TVs and white goods.

For engineers reviewing the ICE2QR1080GXUMA1 datasheet, ICE2QR1080GXUMA1 pinout, ICE2QR1080GXUMA1 application, or ICE2QR1080GXUMA1 equivalent, key selection criteria include its 800 V drain rating, 1.0 Ω R_DS(on), quasiresonant zero-crossing control, active burst mode timing behavior, and integrated startup cell enabling self-biased operation without external high-voltage resistors.

Technical Context

The ICE2QR1080GXUMA1 implements current-mode PWM control with digital zero-crossing detection and an up/down counter to dynamically adjust switching frequency based on load and demagnetization timing - enabling quasi-resonant turn-on across wide load ranges down to light-load conditions. Its internal ZC comparator monitors auxiliary winding voltage with ringing suppression to avoid false triggering during transformer recovery.

It integrates a dedicated startup cell that delivers ~1.05 mA constant-current precharge to VCC until V_VCCON (≈14.5 V) is reached, then disables automatically; combined with cycle-by-cycle current limiting, foldback correction, and auto-restart protections for overvoltage, overload, and overtemperature, it supports robust single-stage flyback designs without auxiliary bias windings.

Key Specifications

Pinout & Package

Package: PG-DSO-12 (12-pin, exposed drain pads, RoHS-compliant, halogen-free mold compound).

Key Features

Applications

Equivalent & Alternatives

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

Compared with ICE2QR4765G and ICE3BR0665J, ICE2QR1080GXUMA1 uniquely combines 800 V ruggedness, digital QR timing, and sub-100 mW standby - making it the only option qualified for high-reliability, universal-input, energy-efficient auxiliary supplies in consumer electronics.

Availability

ICE2QR1080GXUMA1 is available at Aetrix Electronics and suitable for Blu-ray player power supplies, set-top box auxiliary SMPS, and TV backlight auxiliary supplies requiring stable component supply, long-term lifecycle support, and RoHS-compliant manufacturing.

Supply support for ICE2QR1080GXUMA1 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 leadership in high-voltage silicon and GaN solutions.

The CoolSET™-Q1 product line delivers integrated quasi-resonant controllers targeting energy-efficient, compact off-line SMPS for consumer electronics - emphasizing low standby power, surge robustness, and simplified board-level design.

FAQ

What is the purpose of the startup cell in ICE2QR1080GXUMA1?

The startup cell is an integrated high-voltage current source that precharges the VCC capacitor from rectified mains until V_VCCON ≈ 14.5 V is reached. It delivers ~1.05 mA constant current after initial turn-on, eliminating external high-voltage resistors and reducing no-load losses. Once VCC reaches operating range, the cell disables automatically and the IC transitions to normal operation with soft-start.

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

Active Burst Mode dynamically controls burst frequency and on-time duration based on feedback voltage (FB pin). During no-load, the controller enters extended off-periods while maintaining precise output voltage regulation via periodic short bursts - minimizing switching and conduction losses without introducing audible noise or excessive output ripple, verified at <100 mW across 85–265 VAC input.

Can ICE2QR1080GXUMA1 operate without an auxiliary winding?

No - the auxiliary winding is essential for both ZC detection (pin 1) and VCC sustainment (after startup). The ZC signal enables valley-switching; the auxiliary winding powers VCC once output voltage builds up. Without it, the IC will exhaust VCC charge after soft-start and latch into undervoltage protection - no sustained operation is possible.

What is the function of pins 3, 9, and 10 labeled "N.C."?

Pins 3, 9, and 10 are internally unconnected and must remain floating - no external connection or PCB trace should be made to them. These pins exist for mechanical stability and package symmetry in the PG-DSO-12 footprint but carry no electrical function. Connecting them risks unintended coupling or thermal path disruption.