Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > AC DC Converters, Offline Switches

Infineon Technologies ICE5QR0680AZXKLA1

Name: ICE5QR0680AZXKLA1
Brand: Infineon Technologies
SKU: ICE5QR0680AZXKLA1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: ICE5QR0680AZXKLA1

Manufacturer:: Infineon Technologies

Category:: AC DC Converters, Offline Switches

Package:: 8-DIP (0.300", 7.62mm), 7 Leads

Datasheet:: ICE5QR0680AZXKLA1.pdf

Description:: IC OFFLINE SWITCH FLYBACK 7DIP

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:4,477

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

ICE5QR0680AZXKLA1 from Infineon is a quasi-resonant AC-DC controller IC with integrated 800 V avalanche-rugged CoolMOS™, designed for flyback converters in auxiliary power supplies. It delivers up to 74 W at 220 VAC ±20%, features digital frequency reduction (up to 10 zero crossings), <100 mW standby power in Active Burst Mode, and operates with VCC supply range of 10–25.5 V.

For engineers reviewing the ICE5QR0680AZXKLA1 datasheet, ICE5QR0680AZXKLA1 pinout, ICE5QR0680AZXKLA1 application, or ICE5QR0680AZXKLA1 equivalent, key selection criteria include its DIP-7 package, 0.71 Ω R_DS(on), input line OVP/brownout protection, cascode fast-start architecture, and programmable burst entry/exit thresholds for low-power operation.

Technical Context

This IC implements a digitally controlled quasi-resonant flyback controller with integrated high-voltage power switch, using zero-crossing detection (ZCD) to enable valley-switching for reduced EMI and conduction losses. Its proprietary digital frequency reduction dynamically adjusts switching frequency based on load and input voltage, maintaining optimal efficiency across wide operating ranges.

The device employs a dual-chip cascode configuration: one die handles control logic (PWM, soft-start, protection), while the second integrates the 800 V CoolMOS™ power transistor. Protection includes cycle-by-cycle current limiting, VCC over/under-voltage lockout, output overvoltage, thermal shutdown, and CS short-to-GND detection - all with auto-restart behavior.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DS	800 V - Enables direct connection to universal AC mains (85–300 VAC) without external HV MOSFET.
R_DS(on)	0.71 Ω - Supports up to 74 W output at 220 VAC with minimal conduction loss in primary-side switching.
Standby Power	<100 mW - Achieved via Enhanced Active Burst Mode with selectable entry/exit thresholds for energy-efficient no-load operation.
VCC Operating Range	10–25.5 V - Wide supply window accommodates varied auxiliary winding designs and ensures stable startup/operation.
Digital ZC Count	Up to 10 zero crossings - Enables precise valley-switching timing adaptation to reduce EMI and improve light-load efficiency.
Protection Functions	Input OVP, brownout, VCC OVP/UVP, overtemperature, output OVP, overload/open-loop, CS short-to-GND - All trigger auto-restart for robust field reliability.

Pinout & Package

ICE5QR0680AZXKLA1 is housed in PG-DIP-7 (7-pin dual in-line plastic) package with creepage/clearance optimized for reinforced insulation in AC-DC applications.

Pin/Terminal	Circuit Role	Design Meaning
1 FB	Feedback & Burst Control	Combines optocoupler feedback signal input, burst mode entry/exit threshold setting, and overload/open-loop protection sensing.
2 VIN	Line Voltage Sense	Connects to resistor divider from rectified AC bus; enables input overvoltage protection, brownout detection, and line-dependent ZC count selection.
3 CS	Current Sense Input	Receives primary-side current sense voltage; triggers cycle-by-cycle peak current limit and detects CS short-to-GND fault.
4 ZCD	Zero-Crossing Detection	Provides startup gate drive for CoolMOS™, detects transformer demagnetization for valley switching, and supports output overvoltage protection.
5–7 DRAIN	Power Switch Drain	Internally connects to drain of integrated 800 V CoolMOS™; externally tied to primary winding drain node in flyback topology.
8 VCC	IC Supply Input	Accepts 10–25.5 V bias supply; includes overvoltage (16 V) and undervoltage (10 V) lockout with auto-restart.
9 GND	Signal Ground	Common reference for internal analog/digital blocks and external current sense, feedback, and protection circuits.

Key Features

Feature	Design Value
Integrated 800 V CoolMOS™	Eliminates need for external HV MOSFET and driver, reducing BOM count and layout complexity in compact flyback designs.
Digital Frequency Reduction	Adapts switching frequency up to 10 zero crossings per half-cycle to maintain valley switching under varying load and line conditions.
Built-in Digital Soft Start	Prevents inrush current and transformer saturation during power-up by gradually increasing PWM duty cycle over defined time.
Enhanced Active Burst Mode	Allows designer-selectable standby power threshold and hysteresis to meet stringent energy standards (e.g., EU CoC Tier 2, DOE Level VI).
Robust Line Protection	Simultaneous input OVP and brownout detection on single VIN pin reduces external component count and improves system-level safety compliance.

Applications

Home Appliance Auxiliary PSU

LED TV Backlight Power

Use Scenario: Provides isolated 12 V/5 V standby and main rail for microcontroller, display logic, and IR receiver in washing machines and refrigerators.

IC Role / Device Role / Timing Role: Quasi-resonant flyback controller with integrated 800 V switch, managing primary-side regulation and burst-mode transitions.

Use Value: Enables <100 mW standby consumption and meets IEC 62368-1 reinforced insulation requirements without external HV components.

Use Scenario: Powers LED backlight drivers and panel logic in 32–65 inch LCD/LED TVs with universal AC input.

IC Role / Device Role / Timing Role: Primary-side regulated QR flyback controller delivering stable 24 V output with adaptive frequency control.

Use Value: Reduces audible noise via maximum on/off time limitation and achieves >85% full-load efficiency with digital ZC optimization.

PC/Server Standby Supply

Set-Top Box Power

Use Scenario: Generates +5 VSB and +3.3 V rails for motherboard wake-on-LAN, USB charging, and firmware execution in ATX-compliant systems.

IC Role / Device Role / Timing Role: Integrated QR controller with cascode fast-start architecture enabling sub-100 ms startup time from cold input.

Use Value: Meets ENERGY STAR® 8.0 standby power limits (<0.5 W) using selectable Active Burst Mode and low-R_DS(on) 0.71 Ω switch.

Use Scenario: Supplies 12 V and 5 V to SoC, memory, and HDMI interface in cable/satellite set-top boxes with fanless enclosure.

IC Role / Device Role / Timing Role: Primary-side regulated flyback controller with built-in brownout protection for unstable grid conditions.

Use Value: Ensures uninterrupted operation during brownouts (down to 85 VAC) and prevents false triggering via 250 µs blanking time on VIN pin.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
ICE5QR0680AG	Same silicon, but in PG-DSO-12 package with NC pins; higher max output power (77 W @220 VAC) due to improved thermal dissipation.	Suitable for higher-power or thermally constrained designs requiring surface-mount assembly and enhanced heatsinking.	Select when board space allows SMT placement and thermal performance exceeds DIP-7 limits.
ICE5QR1070AZ	700 V CoolMOS™, 1.15 Ω R_DS(on), lower max power (58 W @220 VAC); same DIP-7 package and pinout.	Preferred where lower cost or reduced stress on HV components is prioritized over peak power capability.	Choose for 50–60 W applications with tighter BOM cost targets and less demanding efficiency requirements.

Compared with ICE5QR0680AG, ICE5QR0680AZXKLA1 offers identical electrical specs but in through-hole DIP-7 for manual assembly and legacy compatibility; versus ICE5QR1070AZ, it provides 28% higher output power and 38% lower R_DS(on) at the expense of slightly higher cost and thermal sensitivity.

Availability

ICE5QR0680AZXKLA1 is available at Aetrix Electronics and suitable for home appliance auxiliary PSUs, LED TV backlight power, and PC/server standby supplies requiring stable component supply, long-term lifecycle support, and RoHS-compliant manufacturing.

Supply support for ICE5QR0680AZXKLA1 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 manufacturing and quality certification to ISO 9001 and IATF 16949.

The ICE5QRxxxxAx series belongs to Infineon's CoolSET™ family, engineered specifically for high-efficiency, low-EMI quasi-resonant flyback converters in consumer and industrial auxiliary power supplies.

FAQ

What is the maximum continuous output power achievable with ICE5QR0680AZXKLA1?

The datasheet specifies 74 W at 220 VAC ±20% in an open-frame design with Ta = 50°C and TJ = 125°C. Actual output depends on PCB copper area, heatsinking, transformer design, and ambient conditions. For sustained 70+ W operation, use minimum 2 oz copper on drain pins and ensure adequate airflow or heatsink mounting.

How does the VIN pin implement both line OVP and brownout protection?

VIN senses rectified AC bus via resistor divider. Internal comparators monitor this voltage against two thresholds: ~400 V for OVP (triggering shutdown if exceeded) and ~85 V for brownout (disabling switching until voltage recovers). Both functions share the same pin and blanking time (250 µs) to reject transients.

Can ICE5QR0680AZXKLA1 be used without an optocoupler for regulation?

No - the FB pin requires feedback from a secondary-side optocoupler to regulate output voltage. The IC does not support primary-side sensing or auxiliary winding regulation. Open-loop operation triggers immediate auto-restart protection via FB pin monitoring.

What is the purpose of the ZCD pin beyond zero-crossing detection?

ZCD serves three critical roles: (1) provides initial gate drive during startup to charge VCC capacitor, (2) detects transformer demagnetization for valley-switching timing, and (3) monitors reflected output voltage for overvoltage protection - all using a single pin with internal comparator and blanking circuitry.

ICE5QR0680AZXKLA1 Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: CoolMOS™

Package/Case:: 8-DIP (0.300", 7.62mm), 7 Leads

Packaging:: Bulk

Product Status:: Obsolete

Output Isolation:: Isolated

Internal Switch(s):: Yes

Voltage - Breakdown:: 800V

Topology:: Flyback

Voltage - Start Up:: 16 V

Voltage - Supply (Vcc/Vdd):: 10V ~ 27V

Duty Cycle:: -

Frequency - Switching:: -

Power (Watts):: 74 W

Fault Protection:: Current Limiting, Open Loop, Over Load, Over Temperature, Over Voltage

Control Features:: -

Operating Temperature:: -40°C ~ 125°C (TJ)

Grade:: -

Qualification:: -

Supplier Device Package:: PG-DIP-7

Mounting Type:: Through Hole

ICE5QR0680AZXKLA1 FAQ

1.How can I place an order for ICE5QR0680AZXKLA1 through Aetrix?

Please submit a Request for Quotation (RFQ) for ICE5QR0680AZXKLA1 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for ICE5QR0680AZXKLA1 reliable?

The price and inventory of ICE5QR0680AZXKLA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ICE5QR0680AZXKLA1 is usually 5 days.

3.What payment methods are accepted for ICE5QR0680AZXKLA1?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ICE5QR0680AZXKLA1 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ICE5QR0680AZXKLA1?

ICE5QR0680AZXKLA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ICE5QR0680AZXKLA1 order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for ICE5QR0680AZXKLA1?

For technical support, including ICE5QR0680AZXKLA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ICE5QR0680AZXKLA1 requirements.

6.How does Aetrix verify that ICE5QR0680AZXKLA1 is sourced from the original manufacturer or authorized distributors?

All ICE5QR0680AZXKLA1 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that ICE5QR0680AZXKLA1 meets industry standards.

7.What is the process for return or replacement of ICE5QR0680AZXKLA1?

All ICE5QR0680AZXKLA1 units undergo pre-shipment inspection (PSI). If there is an issue with ICE5QR0680AZXKLA1, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The ICE5QR0680AZXKLA1 part is unused and in its original packaging.

Return procedure for ICE5QR0680AZXKLA1:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

Tech Hub

2026-07-29 18650 Battery: Voltage, Capacity, Charging and Pack Design

18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…

2026-07-27 Hall Effect Sensor: Working Principle, Types, Circuits and Applications

Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…

2026-07-20 Product Change Notification (PCN) in Electronic Components: Meaning and Supply Chain Response

Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…

2026-07-19 Blend Door Actuator: Symptoms, Location, Reset and Replacement Guide

A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…

2026-07-17 Raspberry Pi Alternatives: Chip-Level Comparison, Compatibility and Replacement Guide

Engineering guide to Raspberry Pi alternatives, covering chip-level differences, Orange Pi, ROCK, Jetson, Banana Pi, NanoPi, Compute Module, Pico, GPIO, camera, HAT compatibility, and replacement risks…

2026-07-13 How to Test Dynamic Load Response in Low-Voltage High-Current Buck Converters

Engineering guide to dynamic load response testing for high-current buck converters, covering load step setup, slew rate, Vcore undershoot, overshoot, recovery time, probe location, output capacitors a…

2026-07-08 Output Capacitor Selection for High-Current ASIC Vcore Rails

Engineering guide to output capacitor selection for ASIC Vcore rails, covering bulk capacitors, polymer capacitors, MLCC decoupling, DC bias, ESR, ESL, placement, transient response and substitution ri…

2026-07-07 High-Current ASIC Core Power Supply Design: 12-Phase Buck, PMBus and Dynamic Load Response

Engineering guide to high-current ASIC Vcore rails, covering 12-phase buck architecture, PMBus control, dynamic load testing, output capacitor networks, smart power stage selection, thermal design and …

2026-07-06 Voltage Regulator: Types, Circuits, Testing and Selection Guide

Voltage regulator guide covering linear, LDO, 7805, Zener, adjustable, buck, VRM and alternator regulators, with design checks, testing methods, troubleshooting and datasheet-based selection.

2026-06-30 Amplifiers Explained: Types, Circuits, Gain, Classes and Applications

Amplifier guide covering voltage, current and power amplification, gain, feedback, amplifier classes, audio and RF applications, op-amp circuits, transimpedance amplifiers, datasheet selection and trou…