Infineon Technologies ICE5QR4770AGXUMA1

Overview

ICE5QR4770AGXUMA1 from Infineon is a quasi-resonant 700 V CoolSET™ integrated power IC combining a controller and avalanche-rugged CoolMOS™ in a single PG-DSO-12 package. It delivers up to 27 W at 220 VAC ±20% and 15 W across 85–300 VAC, supports digital frequency reduction up to 10 zero crossings, achieves <100 mW standby power via enhanced Active Burst Mode, and integrates robust line protection including input OVP and brownout - deployed in auxiliary power supplies for LCD/LED monitors and set-top boxes.

For engineers reviewing the ICE5QR4770AGXUMA1 datasheet, ICE5QR4770AGXUMA1 pinout, ICE5QR4770AGXUMA1 application, or ICE5QR4770AGXUMA1 equivalent, key selection criteria include its 700 V drain-source rating, 4.73 Ω R_DS(on), 10–25.5 V V_CC operating range, cascode-based fast startup, and digital zero-crossing detection with ringing suppression timing control.

Technical Context

This IC implements a current-mode PWM controller with integrated 700 V CoolMOS™ in cascode configuration, enabling quasi-resonant flyback operation with valley-switching detection via ZCD pin. Its digital frequency reduction logic uses an up/down counter synchronized to zero crossings, dynamically adjusting switching frequency based on input voltage (VIN pin) to minimize EMI and improve efficiency across line variations.

The controller embeds comprehensive protection: cycle-by-cycle current limiting (CS pin), auto-restart for VCC OVP/UVP, output overvoltage (ZCD pin), overtemperature (OTP), brownout (VIN), and CS short-to-GND. Soft-start is implemented digitally with built-in timing, and maximum on/off time limits suppress audible noise during transients.

Key Specifications

Pinout & Package

ICE5QR4770AGXUMA1 is housed in a PG-DSO-12 (12-pin exposed-pad SOIC) package with creepage-optimized layout for reinforced insulation in AC/DC auxiliary supplies.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ICE5QR4770AZXUMA1, the DSO-12 variant offers superior thermal performance and surface-mount reliability; versus ICE5QR2270AGXUMA1, it trades 14 W output headroom for lower conduction loss sensitivity and reduced cost in mid-power applications.

Availability

ICE5QR4770AGXUMA1 is available at Aetrix Electronics and suitable for home appliance auxiliary supplies, set-top box power systems, and LCD/LED monitor standby rails requiring stable component supply and long-term industrial lifecycle support.

Supply support for ICE5QR4770AGXUMA1 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 MCUs, and industrial control ICs, with global manufacturing and quality certification to ISO 9001 and IATF 16949.

The CoolSET™ product line targets high-efficiency, low-standby-power AC/DC flyback converters for consumer and industrial auxiliary power, integrating HV switches and digital controllers to reduce system complexity and improve reliability.

FAQ

What is the maximum continuous output power achievable with ICE5QR4770AGXUMA1 in a typical open-frame design?

The datasheet specifies 27 W at 220 VAC ±20% and 15 W across 85–300 VAC under defined test conditions: Ta = 50 °C, TJ = 125 °C, 2 oz copper single-sided PCB, minimum drain pin copper area. Actual output depends on transformer design, heatsinking, and ambient airflow - real-world designs typically achieve 22–25 W continuously with proper layout and thermal management.

How does the ZCD pin function during startup and normal operation?

During startup, the ZCD pin provides initial gate drive to the integrated CoolMOS™ to charge the VCC capacitor from the auxiliary winding. In normal operation, it detects transformer demagnetization zero crossings to enable valley switching, and also serves as the input for output overvoltage protection by monitoring reflected secondary voltage via an external resistor divider.

Can the Active Burst Mode entry threshold be adjusted externally?

Yes - the FB pin controls both regulation and Active Burst Mode behavior. By adjusting the optocoupler feedback network (e.g., adding a parallel resistor from FB to GND), designers can shift the burst entry voltage threshold. The datasheet defines V_{FB_BOn} = 1.25 V and V_{FB_BOff} = 1.15 V as nominal thresholds, with hysteresis set by internal circuitry and modifiable via external biasing.

Is the PG-DSO-12 package RoHS-compliant and halogen-free?

Yes - the ICE5QR4770AGXUMA1 uses Pb-free lead plating and a halogen-free mold compound, meeting RoHS Directive 2011/65/EU and JEDEC JS709B requirements. The package marking "G" in the order code (e.g., ICE5QR4770AG) explicitly denotes the halogen-free, RoHS-compliant DSO-12 variant.