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

Infineon Technologies ICE5QR4770AZXKLA1

Name: ICE5QR4770AZXKLA1
Brand: Infineon Technologies
SKU: ICE5QR4770AZXKLA1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: ICE5QR4770AZXKLA1

Manufacturer:: Infineon Technologies

Category:: AC DC Converters, Offline Switches

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

Datasheet:: ICE5QR4770AZXKLA1.pdf

Description:: IC OFFLINE SWITCH FLYBACK 7DIP

Quantity:: RFQ Add To RFQ list

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Product details

Overview

ICE5QR4770AZXKLA1 from Infineon is a quasi-resonant 700 V integrated power IC combining a CoolMOS™ transistor and PWM controller in a single PG-DIP-7 package, delivering 27 W at 220 VAC ±20% and 15 W across 85–300 VAC input, with <100 mW standby power via enhanced Active Burst Mode and digital frequency reduction up to 10 zero crossings for low EMI in auxiliary flyback converters for home appliances and monitors.

For engineers reviewing the ICE5QR4770AZXKLA1 datasheet, ICE5QR4770AZXKLA1 pinout, ICE5QR4770AZXKLA1 application, or ICE5QR4770AZXKLA1 equivalent, key selection criteria include its 700 V avalanche-rugged CoolMOS™, cascode-based fast startup, robust line protection (OVP/brownout), cycle-by-cycle current limiting, and 10–25.5 V VCC operating range - all critical for reliable off-line SMPS design.

Technical Context

The ICE5QR4770AZXKLA1 implements a digitally controlled quasi-resonant flyback controller with integrated 700 V CoolMOS™, using zero-crossing detection (ZCD) for valley-switching and a programmable up/down counter to enforce minimum switching frequency difference between low/high line conditions. Its cascode configuration enables rapid VCC pre-charging and eliminates external startup resistors.

It features dual-mode protection architecture: analog comparators for immediate response (e.g., CS short-to-GND, OVP, brownout) and digital autorestart latching for thermal, overload, and output overvoltage faults. The built-in soft-start and ringing suppression logic (with configurable blanking times) ensure noise-immune turn-on and audible-noise-free operation during transients.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DS	700 V - avalanche-rugged drain-source rating enabling direct connection to universal AC mains without external snubber stress.
R_DS(on)	4.73 Ω - on-resistance value defining conduction loss and thermal rise in continuous conduction mode at T_J = 25°C.
Output Power	27 W @ 220 VAC ±20%, 15 W @ 85–300 VAC - maximum rated output in open-frame design with 2 oz copper PCB, used for initial topology sizing.
Standby Power	<100 mW - achieved via selectable-entry Active Burst Mode, meeting stringent EU CoC Tier 2 and DOE Level VI requirements.
V_CC Range	10–25.5 V - wide supply voltage window supporting flexible biasing schemes and reducing need for external LDOs.
Digital ZC Reduction	Up to 10 zero crossings - dynamically lowers switching frequency under light load to improve efficiency without compromising EMI performance.
Protection Functions	VIN OVP/brownout, VCC OVP/UVP, CS short-to-GND, OTP, OLP, OVP - comprehensive fault coverage with autorestart behavior for system-level reliability.

Pinout & Package

ICE5QR4770AZXKLA1 is housed in a PG-DIP-7 (7-pin dual in-line plastic) package with creepage/clearance optimized for reinforced insulation in AC/DC auxiliary supplies.

Pin/Terminal	Circuit Role	Design Meaning
1 FB	Feedback & Burst Control	Combines optocoupler feedback signal, burst mode entry/exit threshold setting, and overload/open-loop protection trigger.
2 VIN	Line Voltage Sense	Connects to resistor divider on bulk DC bus to enable input OVP, brownout detection, and line-dependent ZC count adjustment.
3 CS	Current Sense Input	Receives primary-side shunt voltage for peak current limiting, cycle-by-cycle shutdown, and CS short-to-GND fault detection.
4 ZCD	Zero-Crossing Detection	Provides startup gate drive for CoolMOS™, detects transformer demagnetization valleys, and supports output OVP sensing.
5–7 DRAIN	High-Voltage Drain Node	Internally connected to CoolMOS™ drain; carries full high-side switching current and must be routed with adequate copper area and clearance.
8 VCC	IC Supply Input	Accepts regulated 10–25.5 V bias; includes internal UVLO (10 V) and OVP (16 V) with autorestart behavior.
9 GND	Power Ground Reference	Common return path for control logic, sense circuitry, and gate driver; requires low-inductance layout to minimize noise coupling.

Key Features

Feature	Design Value
Integrated 700 V CoolMOS™ + Controller	Eliminates discrete HV MOSFET and gate driver, reducing BOM count and layout complexity in flyback designs.
Digital Frequency Reduction	Adaptively scales switching frequency down to ~20 kHz at light loads while maintaining valley switching, improving efficiency without EMI penalty.
Enhanced Active Burst Mode	Allows user-selectable standby power thresholds (via FB pin resistor network), enabling precise compliance with regional energy regulations.
Cascode Startup Configuration	Enables direct charging of VCC capacitor from DRAIN during startup, removing need for high-voltage startup resistor and associated power loss.
Robust Line Protection	Dual-function VIN pin provides both overvoltage lockout (>350 V typical) and brownout recovery (~70 V typical), preventing erratic operation during grid fluctuations.

Applications

Home Appliance Auxiliary Supply

LED Monitor Standby Converter

Use Scenario: Provides isolated 5 V/12 V bias rails for microcontrollers, displays, and communication interfaces in washing machines and refrigerators during standby and active modes.

IC Role / Device Role / Timing Role: Quasi-resonant flyback controller with integrated 700 V switch, managing primary-side regulation and burst-mode transitions based on load demand.

Use Value: Achieves <100 mW no-load consumption and withstands 350 V line surges, ensuring long-term reliability in unregulated utility environments.

Use Scenario: Powers HDMI hot-plug detection, MCU sleep logic, and remote-control receivers in LCD/LED monitors with instant wake-up capability.

IC Role / Device Role / Timing Role: Primary-side regulated flyback controller executing valley-switching and digital frequency scaling to maintain tight output regulation across 85–300 VAC input range.

Use Value: Delivers 15 W output with <100 mW standby and built-in brownout recovery, eliminating external supervisor ICs and reducing bill-of-materials cost.

Set-Top Box Power Management

PC Motherboard Auxiliary Rail

Use Scenario: Supplies 3.3 V/5 V auxiliary power to SoC standby domains, Ethernet PHYs, and USB ports in cable/satellite receivers requiring always-on connectivity.

IC Role / Device Role / Timing Role: Integrated QR controller with programmable burst entry point, enabling dynamic adjustment of standby power based on network activity status.

Use Value: Supports selectable standby thresholds and auto-restart after overtemperature events, meeting FCC Part 15 Class B conducted emissions limits without added filtering.

Use Scenario: Generates +5 VSB rail for ATX-compliant motherboards, powering USB wake signals, BIOS firmware, and PCIe slot presence detection during S5 state.

IC Role / Device Role / Timing Role: High-voltage integrated flyback controller with cascode startup and digital soft-start, ensuring clean VSB ramp-up without inrush current spikes.

Use Value: Integrates 700 V CoolMOS™ and protection logic into one DIP-7 package, simplifying safety-critical isolation barrier layout and reducing creepage distance requirements.

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
ICE5QR4770AG	Same silicon die but in PG-DSO-12 package; higher thermal dissipation capability due to exposed pad and larger copper area.	Suitable for higher ambient temperature or higher-power designs where DIP-7 thermal limits are exceeded.	Select ICE5QR4770AG when board space allows SMT placement and thermal management requires >27 W sustained output.
ICE5QR2270AZ	700 V variant with lower R_DS(on) (2.13 Ω); delivers 41 W @ 220 VAC vs. 27 W for ICE5QR4770AZXKLA1.	Targets mid-power applications like gaming adapters or multi-output auxiliary supplies needing higher output capability.	Choose ICE5QR2270AZ when system requires >30 W output and can accommodate higher conduction losses at light load.

Compared with ICE5QR4770AG, ICE5QR4770AZXKLA1 offers identical electrical performance in a through-hole package ideal for manual assembly and high-voltage creepage compliance, while ICE5QR2270AZ trades higher standby loss for greater power density - making each optimal for distinct thermal, layout, and output-power constraints.

Availability

ICE5QR4770AZXKLA1 is available at Aetrix Electronics and suitable for home appliance auxiliary supplies, LED monitor standby converters, and set-top box power management requiring stable component supply and long-lifecycle support.

Supply support for ICE5QR4770AZXKLA1 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 silicon carbide and CoolMOS™ technologies.

The ICE5QRxxxxAx series belongs to Infineon's CoolSET™ family of integrated quasi-resonant controllers, designed specifically for high-efficiency, low-EMI auxiliary power supplies in consumer and industrial off-line applications.

FAQ

What is the maximum continuous output power achievable with ICE5QR4770AZXKLA1?

The ICE5QR4770AZXKLA1 is rated for 27 W at 220 VAC ±20% and 15 W across 85–300 VAC in an open-frame reference design with 2 oz copper PCB and T_J = 125°C. Actual output depends on transformer design, heatsinking, and ambient temperature - real-world implementations typically achieve 22–25 W continuously with proper layout and thermal management.

Does ICE5QR4770AZXKLA1 require an external startup resistor?

No. ICE5QR4770AZXKLA1 uses a cascode configuration where the integrated CoolMOS™ drain directly charges the VCC capacitor during startup via the ZCD pin, eliminating the need for a high-voltage startup resistor and associated power loss - a key differentiator from conventional flyback controllers.

How does the Active Burst Mode reduce standby power below 100 mW?

Active Burst Mode dynamically disables switching cycles based on feedback voltage level, with selectable entry/exit thresholds set via external resistors on the FB pin. During standby, the controller enters deep-sleep intervals between short bursts of switching, minimizing switching and conduction losses while maintaining output regulation - verified to deliver <100 mW at 230 VAC input.

Can ICE5QR4770AZXKLA1 operate with universal AC input (85–300 VAC)?

Yes. The device supports 85–300 VAC input via its VIN pin, which senses rectified line voltage through a resistor divider to enable brownout detection (~70 V) and overvoltage protection (~350 V). Its 700 V CoolMOS™ and 10–25.5 V VCC operating range ensure robust operation across the full universal input range without derating.

ICE5QR4770AZXKLA1 Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: CoolMOS™, CoolSET™

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

Packaging:: Bulk

Product Status:: Not For New Designs

Output Isolation:: Isolated

Internal Switch(s):: Yes

Voltage - Breakdown:: 700V

Topology:: Flyback

Voltage - Start Up:: 16 V

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

Duty Cycle:: -

Frequency - Switching:: -

Power (Watts):: 27 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

ICE5QR4770AZXKLA1 FAQ

1.How can I place an order for ICE5QR4770AZXKLA1 through Aetrix?

Please submit a Request for Quotation (RFQ) for ICE5QR4770AZXKLA1 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 ICE5QR4770AZXKLA1 reliable?

The price and inventory of ICE5QR4770AZXKLA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ICE5QR4770AZXKLA1 is usually 5 days.

3.What payment methods are accepted for ICE5QR4770AZXKLA1?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ICE5QR4770AZXKLA1 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ICE5QR4770AZXKLA1?

ICE5QR4770AZXKLA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ICE5QR4770AZXKLA1 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 ICE5QR4770AZXKLA1?

For technical support, including ICE5QR4770AZXKLA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ICE5QR4770AZXKLA1 requirements.

6.How does Aetrix verify that ICE5QR4770AZXKLA1 is sourced from the original manufacturer or authorized distributors?

All ICE5QR4770AZXKLA1 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 ICE5QR4770AZXKLA1 meets industry standards.

7.What is the process for return or replacement of ICE5QR4770AZXKLA1?

All ICE5QR4770AZXKLA1 units undergo pre-shipment inspection (PSI). If there is an issue with ICE5QR4770AZXKLA1, 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 ICE5QR4770AZXKLA1 part is unused and in its original packaging.

Return procedure for ICE5QR4770AZXKLA1:

1.Submit a request within 90 days.

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

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