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

Infineon Technologies ICE2QR4765ZXKLA1

Name: ICE2QR4765ZXKLA1
Brand: Infineon Technologies
SKU: ICE2QR4765ZXKLA1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: ICE2QR4765ZXKLA1

Manufacturer:: Infineon Technologies

Category:: AC DC Converters, Offline Switches

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

Datasheet:: ICE2QR4765ZXKLA1.pdf

Description:: IC OFFLINE SWITCH FLYBACK 7DIP

Quantity:: RFQ Add To RFQ list

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Product details

Overview

ICE2QR4765ZXKLA1 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 LCD monitors, DVD/Blu-ray players, and set-top boxes. It delivers 31W at 230VAC ±15%, features Active Burst Mode (<100mW no-load standby), digital frequency reduction, and built-in cycle-by-cycle current limiting.

For engineers reviewing the ICE2QR4765ZXKLA1 datasheet, ICE2QR4765ZXKLA1 pinout, ICE2QR4765ZXKLA1 application, or ICE2QR4765ZXKLA1 equivalent, key selection criteria include integrated high-voltage MOSFET rating (650V), quasi-resonant zero-voltage switching capability, VCC pre-charge startup behavior, burst-mode ripple control, and transformer short-winding protection implementation.

Technical Context

This device integrates a BiCMOS PWM controller with a 650V avalanche-rugged CoolMOS® power switch and dedicated startup cell - eliminating external high-voltage start-up resistors. Its digital zero-crossing detection enables precise quasi-resonant switching across load range, reducing EMI and secondary diode voltage stress.

The controller implements digital frequency reduction via an up/down counter synchronized to feedback voltage (VFB) thresholds (VFBZL/VFBZH/VFBR1), with ringing suppression time control to prevent false triggering during low-output or short-circuit conditions. Protection includes auto-restart for VCC over/under-voltage, overload, and overtemperature, plus latch-off for adjustable output overvoltage and transformer short-winding detection.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DS	650V - Withstands peak drain voltage in universal-input offline SMPS without external snubber stress.
R_DS(on)	4.7 Ω @ T_j = 25°C - Enables efficient primary-side conduction with minimal thermal rise at rated load.
Max Input Power	31W @ 230VAC ±15% - Defines maximum continuous output capability under nominal mains conditions.
Standby Power	<100 mW @ no load - Achieved via Active Burst Mode with controllable output ripple and low quiescent consumption.
Soft-Start Time	12 ms (4-step digital ramp) - Gradually increases CS peak voltage from 0.32V to 1.0V to limit inrush and transformer stress.
Operating V_CC	8.5–25 V - Wide supply range supports auxiliary winding design flexibility and robust brown-out immunity.
Protection Modes	Auto-restart (VCC OVP/UVP, overload, overtemperature); latch-off (output OVP, transformer short-winding) - Ensures fail-safe operation without manual reset.

Pinout & Package

Package: PG-DIP-7 (Plastic Dual-In-Line Package, 7-pin, through-hole mount, RoHS-compliant lead plating).

Pin/Terminal	Circuit Role	Design Meaning
1 ZC	Zero-Crossing Detection Input	Accepts delayed auxiliary winding signal to trigger quasi-resonant MOSFET turn-on at valley; also used for output overvoltage detection.
2 FB	Feedback Input	Carries optocoupler-derived regulation signal; controls PWM off-time, digital frequency reduction, burst ratio, and open-loop protection.
3 CS	Current Sense / Source Terminal	Connects to shunt resistor for primary current monitoring; also serves as CoolMOS® source node (650V-rated at T_j = 110°C).
4 N.C.	No Connection	Internally unconnected; must remain floating - no external tie or pull-up/down.
5 Drain	CoolMOS® Drain Terminal	Main high-voltage power switch output; connects directly to rectified bus (C_bus) - rated 650V with avalanche ruggedness.
6 VCC	Controller Supply Voltage	Power input for internal logic and gate driver; pre-charged via integrated startup cell until V_VCCon ≈ 12.5V is reached.
7 GND	Controller Ground Reference	Common return for all internal analog/digital circuits; separate from power ground path to minimize noise coupling.

Key Features

Feature	Design Value
Integrated 650V CoolMOS® + Startup Cell	Eliminates external HV start-up resistor and discrete MOSFET, reducing BOM count and PCB footprint in compact SMPS designs.
Quasi-Resonant Operation to Very Low Load	Maintains valley-switching down to light loads, minimizing switching loss and EMI without requiring external resonant components.
Digital Frequency Reduction	Adjusts switching frequency downward as load decreases - preserving efficiency while avoiding audible noise in audio-sensitive applications.
Built-in Digital Soft-Start (12ms, 4-step)	Prevents transformer saturation and inrush current by linearly ramping peak current sense threshold during power-up.
Foldback Point Correction	Automatically adjusts current limit threshold based on VCC level to maintain stable regulation during line transients and brown-outs.

Applications

LCD Monitor Power Supply

DVD/Blu-ray Player SMPS

Use Scenario: Standalone 24V/3A auxiliary rail generation in slim-profile LCD monitor with universal AC input (85–265VAC).

IC Role / Device Role / Timing Role: Primary-side quasi-resonant PWM controller with integrated 650V switch and self-biasing startup cell.

Use Value: Enables compact, low-EMI design meeting ENERGY STAR® Tier 2 standby requirements (<100mW) without auxiliary bias winding.

Use Scenario: Main 12V/2A SMPS in consumer Blu-ray disc player with fast transient response and low acoustic noise.

IC Role / Device Role / Timing Role: Quasi-resonant controller implementing digital frequency reduction and active burst mode for dynamic load handling.

Use Value: Reduces audible coil whine during video playback pauses and maintains <0.5% output ripple in burst mode via controlled on/off timing.

Set-Top Box AC-DC Adapter

Compact Wall-Wart Charger

Use Scenario: 5V/2.5A isolated flyback supply in cable/satellite STB with tight thermal constraints and CE/EN55022 Class B compliance.

IC Role / Device Role / Timing Role: Integrated controller providing valley detection, cycle-by-cycle current limiting, and transformer short-winding protection.

Use Value: Eliminates need for external OVP circuitry and reduces component count by 30% vs. discrete controller + MOSFET solutions.

Use Scenario: 5V/1A universal-input wall adapter for IoT sensors, requiring ultra-low standby power and high reliability.

IC Role / Device Role / Timing Role: Self-starting quasi-resonant IC with latch-off OVP and auto-restart overtemperature protection.

Use Value: Meets IEC 62368-1 safety requirements with single-chip isolation barrier support and no external HV start-up components.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
ICE2QR4765Z	Same die, identical electrical specs; differs only in marking format (no "XKLA1" suffix) and minor packaging variant (PG-DIP-7 vs. PG-DIP-7-1).	Identical functional use in same target applications; validated for same reference designs (e.g., Infineon DER-229).	Select when full Infineon traceability and latest production lot alignment are required; XKLA1 denotes specific wafer fab and test flow.
ICE3B0565J	Fixed-frequency PWM controller (not QR), 650V CoolMOS®, no integrated startup cell - requires external HV resistor and lacks burst mode.	Suitable for cost-sensitive, non-standby-critical applications where EMI filtering budget allows higher fundamental frequency.	Choose only if quasi-resonant operation and sub-100mW standby are not mandatory; expect ~2–3% lower full-load efficiency and higher EMI filter cost.

Compared with ICE2QR4765Z and ICE3B0565J, ICE2QR4765ZXKLA1 provides superior light-load efficiency and EMI performance via valley-switching, eliminates start-up resistor losses, and delivers tighter output regulation under line and load transients due to digital frequency adaptation.

Availability

ICE2QR4765ZXKLA1 is available at Aetrix Electronics and suitable for LCD monitor power supplies, Blu-ray player SMPS, and set-top box adapters requiring stable component supply, long-term lifecycle support, and RoHS-compliant through-hole assembly.

Supply support for ICE2QR4765ZXKLA1 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 manufacturing infrastructure.

This part belongs to the CoolSET®-Q1 product line - engineered specifically for high-efficiency, low-standby-power quasi-resonant offline SMPS in consumer electronics, emphasizing integration, thermal robustness, and regulatory compliance.

FAQ

What is the purpose of the ZC pin in ICE2QR4765ZXKLA1?

The ZC (Zero Crossing) pin receives a delayed signal from the transformer auxiliary winding to detect demagnetization valleys for quasi-resonant turn-on. It also serves dual function: internal comparison against a preset threshold enables output overvoltage protection without external circuitry. The pin's internal hysteresis prevents false triggering during ringing.

How does the integrated startup cell eliminate the need for an external HV resistor?

The startup cell embeds a high-voltage device and control logic inside the CoolMOS® die. At power-on, it delivers ~1.05mA constant current to charge the VCC capacitor until V_VCCON ≈ 12.5V is reached, then shuts off automatically. This replaces traditional 1–2 MΩ HV resistors that dissipate >100mW continuously and degrade over time.

Can ICE2QR4765ZXKLA1 operate in discontinuous conduction mode (DCM) only?

Yes - the device is designed exclusively for DCM quasi-resonant operation. Its zero-crossing detector and digital frequency reduction logic assume complete transformer demagnetization before each switch-on event. It does not support continuous conduction mode (CCM) or forced CCM operation, and lacks slope compensation circuitry required for CCM stability.

What is the maximum allowable VCC voltage before auto-restart protection triggers?

VCC overvoltage protection activates at V_VCCOVP = 27.5V (typical), initiating auto-restart after a 100ms delay. During normal operation, VCC must be maintained between V_VCCOFF = 8.5V (turn-off threshold) and V_VCCOVP. Sustained VCC above 27.5V indicates auxiliary winding regulation failure or feedback loop break.

ICE2QR4765ZXKLA1 Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: CoolMOS™, CoolSET™-Q1

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

Packaging:: Tube

Product Status:: Last Time Buy

Output Isolation:: Isolated

Internal Switch(s):: Yes

Voltage - Breakdown:: 650V

Topology:: Flyback

Voltage - Start Up:: 18 V

Voltage - Supply (Vcc/Vdd):: 10.5V ~ 27V

Duty Cycle:: 50%

Frequency - Switching:: 52kHz

Power (Watts):: 31 W

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

Control Features:: -

Operating Temperature:: -40°C ~ 150°C (TJ)

Grade:: -

Qualification:: -

Supplier Device Package:: PG-DIP-7-1

Mounting Type:: Through Hole

ICE2QR4765ZXKLA1 FAQ

1.How can I place an order for ICE2QR4765ZXKLA1 through Aetrix?

Please submit a Request for Quotation (RFQ) for ICE2QR4765ZXKLA1 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 ICE2QR4765ZXKLA1 reliable?

The price and inventory of ICE2QR4765ZXKLA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ICE2QR4765ZXKLA1 is usually 5 days.

3.What payment methods are accepted for ICE2QR4765ZXKLA1?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ICE2QR4765ZXKLA1 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ICE2QR4765ZXKLA1?

ICE2QR4765ZXKLA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ICE2QR4765ZXKLA1 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 ICE2QR4765ZXKLA1?

For technical support, including ICE2QR4765ZXKLA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ICE2QR4765ZXKLA1 requirements.

6.How does Aetrix verify that ICE2QR4765ZXKLA1 is sourced from the original manufacturer or authorized distributors?

All ICE2QR4765ZXKLA1 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 ICE2QR4765ZXKLA1 meets industry standards.

7.What is the process for return or replacement of ICE2QR4765ZXKLA1?

All ICE2QR4765ZXKLA1 units undergo pre-shipment inspection (PSI). If there is an issue with ICE2QR4765ZXKLA1, 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 ICE2QR4765ZXKLA1 part is unused and in its original packaging.

Return procedure for ICE2QR4765ZXKLA1:

1.Submit a request within 90 days.

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

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