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

Infineon Technologies ICE5QR4780BGXUMA1

Name: ICE5QR4780BGXUMA1
Brand: Infineon Technologies
SKU: ICE5QR4780BGXUMA1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: ICE5QR4780BGXUMA1

Manufacturer:: Infineon Technologies

Category:: AC DC Converters, Offline Switches

Package:: 16-SOIC (0.154", 3.90mm Width), 12 Leads

Datasheet:: ICE5QR4780BGXUMA1.pdf

Description:: IC OFFLINE SWITCH FLYBACK 12DSO

Quantity:: RFQ Add To RFQ list

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Product details

Overview

ICE5QR4780BGXUMA1 from Infineon is a quasi-resonant 800 V integrated power IC combining a digital PWM controller and avalanche-rugged CoolMOS™ in a single DSO-12 package, delivering 28 W at 220 VAC ±20% and 15 W across 85–300 VAC for flyback converters in auxiliary power supplies of TVs, monitors, and home appliances.

For engineers reviewing the ICE5QR4780BGXUMA1 datasheet, ICE5QR4780BGXUMA1 pinout, ICE5QR4780BGXUMA1 application, or ICE5QR4780BGXUMA1 equivalent, key selection criteria include its <100 mW standby power in Active Burst Mode, digital frequency reduction up to 10 zero crossings, cascode-based fast startup, and dual-line protection (OVP + brownout) with auto-restart behavior.

Technical Context

This device implements a digitally controlled quasi-resonant flyback topology with cycle-by-cycle current limiting, built-in soft-start, and programmable minimum zero-crossing count for adaptive switching frequency control across input line variations. Its cascode configuration enables rapid VCC pre-charging and eliminates external startup resistors.

The integrated protection suite includes line OVP/brownout detection on VIN, output OVP via ZCD, VCC over/under-voltage lockout, thermal shutdown with hysteresis, and overload/open-loop detection via FB pin voltage thresholds - all with auto-restart behavior and blanking times validated per functional block diagram.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DS	800 V - Enables direct connection to universal AC mains without external HV clamping.
R_DS(on)	4.13 Ω - Determines conduction loss and thermal rise in 28 W open-frame design at T_J = 125°C.
Standby Power	<100 mW - Achieved via Enhanced Active Burst Mode with selectable entry/exit thresholds.
VCC Range	10–25.5 V - Supports wide auxiliary supply range; UVLO at ~10 V, OVP at ~25.5 V.
Digital ZC Reduction	Up to 10 zero crossings - Dynamically lowers switching frequency under light load to boost efficiency & reduce audible noise.
Startup Method	Cascode configuration - Enables fast VCC charging without high-voltage startup resistor, reducing component count.
Protection Coverage	Line OVP, brownout, VCC OVP/UVP, overload, output OVP, overtemperature - All with auto-restart and configurable blanking.

Pinout & Package

ICE5QR4780BGXUMA1 is housed in PG-DSO-12 (12-pin exposed pad) package with four parallel DRAIN pins for low-inductance, high-current routing and thermal enhancement. The exposed pad is electrically connected to GND.

Pin/Terminal	Circuit Role	Design Meaning
1 FB	Feedback & burst control	Combines primary-side regulation, burst mode entry/exit threshold setting, and overload/open-loop fault detection.
2 VIN	Line sensing input	Senses rectified AC bus via resistor divider; sets min ZC count for line-adaptive QR operation and triggers OVP/brownout.
3 CS	Current sense input	Receives shunt voltage for peak current limiting and switch-off timing; includes leading-edge blanking.
4 ZCD	Zero crossing & OVP	Detects transformer demagnetization for QR timing; also provides output OVP detection and startup VCC charging path.
5–8 DRAIN	CoolMOS™ drain terminals	Four paralleled pins reduce R_DS(on) contribution and improve thermal dissipation from integrated 800 V MOSFET.
11 VCC	IC supply rail	Power input for controller; regulated internally; UVLO/OVP thresholds ensure safe start-up and fault shutdown.
12 GND	Signal & power ground	Common reference for all analog blocks, gate driver, and thermal sensor; tied to exposed pad.
9,10 NC	No connect	Unbonded pins - must remain unconnected per datasheet; no internal circuitry attached.

Key Features

Feature	Design Value
Integrated 800 V CoolMOS™	Eliminates external HV MOSFET and associated gate drive complexity while maintaining avalanche ruggedness.
Digital frequency reduction	Adaptively reduces switching frequency up to 10 zero crossings to minimize light-load losses and EMI.
Enhanced Active Burst Mode	Allows designer-selectable standby power threshold and hysteresis, enabling compliance with <100 mW regulations.
Built-in digital soft-start	Prevents inrush current and transformer saturation during power-up without external RC network.
Robust line protection	Dual-function VIN pin delivers both input OVP and brownout detection with independent blanking and auto-restart.

Applications

TV Auxiliary Power Supply

LCD/LED Monitor PSU

Use Scenario: Provides isolated 5 V/12 V standby and main rails for smart TV mainboards and backlight drivers.

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

Use Value: Achieves <100 mW standby consumption and meets CISPR-22 Class B EMI limits without added snubbers.

Use Scenario: Powers logic, microcontroller, and LED driver ICs in slim-panel LCD/LED monitors operating across global AC inputs.

IC Role / Device Role / Timing Role: Primary-side regulated QR flyback IC handling 85–300 VAC input with adaptive frequency scaling.

Use Value: Delivers 15 W continuous output with digital soft-start and line-protection robustness for unattended operation.

Home Appliance Control PSU

Set-Top Box Power Module

Use Scenario: Supplies 3.3 V/5 V control logic and communication interfaces in washing machines, refrigerators, and ovens.

IC Role / Device Role / Timing Role: Integrated controller-MOSFET solution implementing QR flyback with brownout recovery and thermal foldback.

Use Value: Sustains reliable startup and regulation during brownout events common in residential grids.

Use Scenario: Powers SoC, memory, and HDMI interface in cable/satellite set-top boxes requiring low-noise, compact PSU.

IC Role / Device Role / Timing Role: Digital QR controller with cascode startup and ringing suppression for low-audible-noise operation.

Use Value: Reduces acoustic noise during power-down by limiting max on/off time and applying digital ZC control.

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
ICE5QR2280BGXUMA1	Lower R_DS(on) (2.13 Ω), higher output power (42 W @ 220 VAC)	Targeted for 20–40 W designs requiring higher efficiency at medium loads	Select when >28 W output or lower conduction loss is required; same pinout and feature set.
ICE5QR1680BGXUMA1	Lower R_DS(on) (1.53 Ω), highest output power (50 W @ 220 VAC)	Suitable for larger auxiliary PSUs in commercial displays or multi-rail systems	Choose for >40 W applications where thermal margin and full-load efficiency are critical.

Compared with ICE5QR2280BGXUMA1 and ICE5QR1680BGXUMA1, ICE5QR4780BGXUMA1 offers optimal balance of cost, size, and thermal performance for 15–28 W auxiliary supplies - making it ideal where board space and standby power are constrained but full-load demand remains moderate.

Availability

ICE5QR4780BGXUMA1 is available at Aetrix Electronics and suitable for TV auxiliary power supplies, LCD/LED monitor PSUs, and home appliance control power supplies requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.

Supply support for ICE5QR4780BGXUMA1 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 leadership in silicon carbide and CoolMOS™ technologies.

The ICE5QRxx80BG series belongs to Infineon's CoolSET™ family - designed specifically for highly integrated, low-EMI, quasi-resonant flyback converters targeting auxiliary and main power supplies in consumer electronics.

FAQ

What is the maximum continuous output power rating for ICE5QR4780BGXUMA1?

The datasheet specifies 28 W at 220 VAC ±20% and 15 W across 85–300 VAC under defined test conditions: open-frame design, T_a = 50°C, T_J = 125°C, and minimum drain copper area on a 2 oz single-sided PCB. Actual output depends on layout, heatsinking, and transformer design.

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

VIN senses the rectified AC bus through an external resistor divider. Internal comparators monitor this voltage against two thresholds: one for overvoltage (line OVP) and another for undervoltage (brownout). Each triggers independent auto-restart protection with 250 µs blanking to prevent false trips during transients.

Can ICE5QR4780BGXUMA1 operate without an external startup resistor?

Yes - its cascode configuration allows direct charging of the VCC capacitor from the DRAIN node during startup, eliminating the need for a high-voltage startup resistor. This reduces component count, improves startup speed, and avoids resistor power loss and reliability concerns.

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

ZCD serves three functions: (1) detects transformer demagnetization for QR timing, (2) provides output overvoltage protection by monitoring reflected secondary voltage, and (3) supplies initial gate drive during startup to charge VCC. It integrates all three into a single pin with internal signal conditioning and blanking.

ICE5QR4780BGXUMA1 Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: CoolMOS™, CoolSET™

Package/Case:: 16-SOIC (0.154", 3.90mm Width), 12 Leads

Packaging:: Tape & Reel (TR)

Product Status:: Active

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):: 28 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-DSO-12-21

Mounting Type:: Surface Mount

ICE5QR4780BGXUMA1 FAQ

1.How can I place an order for ICE5QR4780BGXUMA1 through Aetrix?

Please submit a Request for Quotation (RFQ) for ICE5QR4780BGXUMA1 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 ICE5QR4780BGXUMA1 reliable?

The price and inventory of ICE5QR4780BGXUMA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ICE5QR4780BGXUMA1 is usually 5 days.

3.What payment methods are accepted for ICE5QR4780BGXUMA1?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ICE5QR4780BGXUMA1 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ICE5QR4780BGXUMA1?

ICE5QR4780BGXUMA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ICE5QR4780BGXUMA1 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 ICE5QR4780BGXUMA1?

For technical support, including ICE5QR4780BGXUMA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ICE5QR4780BGXUMA1 requirements.

6.How does Aetrix verify that ICE5QR4780BGXUMA1 is sourced from the original manufacturer or authorized distributors?

All ICE5QR4780BGXUMA1 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 ICE5QR4780BGXUMA1 meets industry standards.

7.What is the process for return or replacement of ICE5QR4780BGXUMA1?

All ICE5QR4780BGXUMA1 units undergo pre-shipment inspection (PSI). If there is an issue with ICE5QR4780BGXUMA1, 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 ICE5QR4780BGXUMA1 part is unused and in its original packaging.

Return procedure for ICE5QR4780BGXUMA1:

1.Submit a request within 90 days.

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

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