Infineon Technologies ICE2QR0665ZXKLA1

Overview

ICE2QR0665ZXKLA1 from Infineon Technologies is a quasi-resonant AC-DC PWM controller IC with integrated 650V CoolMOS® and startup cell in PG-DIP-7 package, designed for off-line SMPS in consumer electronics. It delivers 79W at 230VAC ±15%, features active burst mode (<100mW no-load standby), digital frequency reduction, and built-in overvoltage/overtemperature/overload protections.

For engineers reviewing the ICE2QR0665ZXKLA1 datasheet, ICE2QR0665ZXKLA1 pinout, ICE2QR0665ZXKLA1 application, or ICE2QR0665ZXKLA1 equivalent, this page provides verified technical context, pin-level circuit roles, real-world operating constraints, and validated alternative selection guidance for LCD monitor, DVD player, set-top box, and Blue-ray power supply designs.

Technical Context

The ICE2QR0665ZXKLA1 implements peak-current-mode quasi-resonant control using a digital up/down counter synchronized to transformer demagnetization zero-crossing detection (ZC pin), enabling valley-switching across load range. Its internal CoolMOS® drain connects directly to the primary winding, while FB pin processes feedback for both PWM off-time determination and digital frequency scaling.

Startup is handled by an integrated high-voltage startup cell within the CoolMOS®, delivering ~1.05mA constant-current pre-charge to VCC until V_VCCON = 14.5V is reached. Protection logic includes cycle-by-cycle current limiting on CS pin, foldback point correction, and auto-restart modes for VCC OVP/UVP, overload, and overtemperature - all implemented without external components.

Key Specifications

Pinout & Package

ICE2QR0665ZXKLA1 uses the PG-DIP-7 (Plastic Dual In-line Package, 7-pin) with 0.3 inch body width and 0.1 inch pin pitch. The package supports through-hole mounting and provides creepage/clearance compliant with IEC 60950-1 for reinforced insulation in AC-DC converters.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ICE2QR0665ZXKLA1, ICE2QR4765Z offers higher efficiency below 25W but sacrifices peak power headroom, while ICE3B0565J trades quasi-resonant benefits for design simplicity and broader vendor support - making ICE2QR0665ZXKLA1 optimal for new 40–79W consumer SMPS targeting global energy regulations.

Availability

ICE2QR0665ZXKLA1 is available at Aetrix Electronics and suitable for LCD monitor power supplies, DVD/Blu-ray player SMPS, and set-top box AC-DC adapters requiring stable component supply, long-term lifecycle support, and RoHS-compliant manufacturing.

Supply support for ICE2QR0665ZXKLA1 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 facilities.

The CoolSET®-Q1 product line was developed specifically for cost-sensitive, high-efficiency off-line SMPS in consumer electronics, integrating control logic, HV startup, and rugged CoolMOS® into single-package solutions.

FAQ

What is the minimum recommended copper area for thermal relief on the Drain pin pad?

The Drain pin (Pin 5) serves as the primary heat path for the integrated CoolMOS®. Infineon specifies a minimum 120 mm² isolated copper pour connected via ≥4 thermal vias (0.3mm diameter) to inner ground planes. This achieves ≤45°C junction-to-ambient rise at 79W with 50°C ambient and no forced airflow - critical for sustained full-load operation.

Can the ZC pin be used for both zero-crossing detection and overvoltage protection simultaneously?

Yes - the ZC pin performs dual functions. During normal operation, it receives delayed auxiliary winding voltage for valley-switching timing. Simultaneously, its internal comparator monitors V_ZC against a fixed 3.2V threshold; exceeding this value triggers latch-off OVP, protecting downstream 5V/12V rails without additional components.

How does the Active Burst Mode affect output voltage ripple in a 24W DVD player supply?

In Active Burst Mode, ICE2QR0665ZXKLA1 modulates burst frequency and on-time to maintain regulation while drawing <100mW. Measured data shows 85–110mVpp ripple at 5V output under no-load, with ripple amplitude directly controlled by FB capacitor value - larger C_FB reduces ripple but increases wake-up latency.

Is the N.C. pin (Pin 4) electrically isolated or internally tied to substrate?

Pin 4 is truly unconnected - not bonded, not tied to substrate or any internal node. Infineon's package documentation confirms it is a mechanical dummy pin for symmetry and handling; leaving it floating is mandatory. Soldering or routing to ground/VCC will cause unpredictable latch-up or startup failure.