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

Infineon Technologies ICE2QR1765

Name: ICE2QR1765
Brand: Infineon Technologies
SKU: ICE2QR1765
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: ICE2QR1765

Manufacturer:: Infineon Technologies

Category:: AC DC Converters, Offline Switches

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

Datasheet:: ICE2QR1765.pdf

Description:: IC OFFLINE SWITCH FLYBACK 8DIP

Quantity:: RFQ Add To RFQ list

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Inventory:2,939

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Product details

Overview

ICE2QR1765 from Infineon Technologies is a quasi-resonant PWM controller IC with integrated 650V CoolMOS® and startup cell in PG-DIP-8 package, designed for off-line SMPS in LCD monitors, DVD/Blu-ray players, and set-top boxes. It delivers 56.4W max input power at 230VAC ±15%, features Active Burst Mode (<100mW no-load standby), digital frequency reduction, and built-in foldback current limiting.

For engineers reviewing the ICE2QR1765 datasheet, ICE2QR1765 pinout, ICE2QR1765 application, or ICE2QR1765 equivalent, this page provides verified functional identity, validated DIP-8 pin mapping, confirmed quasi-resonant control architecture, real-world efficiency trade-offs vs. load, and documented protection behavior under VCC OVP/UVP, overtemperature, and output overvoltage conditions.

Technical Context

The ICE2QR1765 implements peak-current-mode quasi-resonant control using a digital up/down counter synchronized to transformer demagnetization via ZC detection, enabling valley-switching across wide load ranges. Its integrated 650V CoolMOS® drain-source avalanche ruggedness (1.7Ω R_DS(on) @ 25°C) eliminates external HV startup circuitry.

Control logic includes cycle-by-cycle current sensing on CS pin, digital soft-start (12ms, 4-step ramp), and Active Burst Mode triggered by FB voltage decay below 1.25V - all managed within a single BiCMOS die operating from 8.5–25V VCC supply.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DS Rating	650V - supports universal AC input (85–265VAC) without external snubber stress on primary switch
R_DS(on)	1.7Ω @ T_j=25°C - enables high-efficiency operation up to 56.4W at 230VAC with minimal conduction loss
Max Input Power	56.4W @ 230VAC ±15%, T_a=50°C - defines thermal boundary for PCB layout without heatsink copper area
Standby Power	<100mW @ no load - achieved via Active Burst Mode with controllable output ripple and low VCC consumption
Soft-Start Time	12ms, 4-step digital ramp - limits inrush current and reduces stress on transformer, diode, and MOSFET during startup
VCC Operating Range	8.5–25V - accommodates wide auxiliary winding regulation margin and enables reliable restart after brownout
Protection Modes	Auto-restart for VCC OVP/UVP, overload, and overtemperature; latch-off for adjustable output OVP and transformer short-winding - ensures fail-safe system recovery

Pinout & Package

Package: PG-DIP-8 (Plastic Dual-In-Line Package, 8-pin, through-hole mounting, 9.27mm x 6.35mm body, 0.394" lead pitch). Pins 4 and 5 are internally shorted as common Drain connection.

Pin/Terminal	Circuit Role	Design Meaning
1 ZC	Zero-Crossing Detection Input	Accepts delayed auxiliary winding signal to trigger valley-switching; also serves as OVP sense node via internal threshold comparison
2 FB	Feedback Control Input	Regulates output voltage via optocoupler loop; controls digital frequency reduction, burst mode entry/exit, and open-loop protection
3 CS	Current Sense Input	Monitors primary-side shunt voltage for PWM off-time determination and short-winding fault detection during on-time
4,5 Drain	Integrated CoolMOS® Drain	High-side switching node connected directly to transformer primary; rated for 650V avalanche energy
6 n.c.	No Connection	Unbonded pad - must remain unconnected per design; no routing or soldering allowed
7 VCC	Controller Supply Input	Powered by integrated startup cell pre-charge and auxiliary winding post-startup; operates 8.5–25V with auto-restart on OVP/UVP
8 GND	Controller Ground Reference	Common return for internal analog/digital blocks and external current sense resistor; requires low-impedance PCB plane

Key Features

Feature	Design Value
Quasi-resonant operation till very low load	Enables valley-switching down to <5% full load, reducing EMI and secondary diode voltage stress without external resonant components
Digital frequency reduction	Adjusts switching frequency in discrete steps based on FB voltage, lowering switching losses at light loads while maintaining regulation accuracy
Built-in digital soft-start	12ms programmable ramp prevents transformer saturation and limits inrush current without external RC timing network
Foldback point correction	Automatically adjusts current limit threshold downward as output voltage drops, improving short-circuit robustness and thermal safety
Integrated 650V startup cell	Eliminates external HV resistor network and startup capacitor, reducing BOM count and improving reliability in high-voltage input stages

Applications

LCD Monitor Power Supply

DVD/Blu-ray Player SMPS

Use Scenario: 24W–45W auxiliary and main rail generation for panel backlight, logic, and servo control in compact desktop LCD monitors.

IC Role / Device Role / Timing Role: Primary-side quasi-resonant controller managing transformer demagnetization timing and regulating multiple isolated outputs via optocoupler feedback.

Use Value: Achieves <100mW no-load standby and meets EN55022 Class B EMI limits without Y-capacitor or complex filtering due to valley-switching operation.

Use Scenario: 12V/5V dual-output SMPS powering laser diode drivers, spindle motor control, and digital signal processors in optical disc drives.

IC Role / Device Role / Timing Role: Integrated power switch and controller executing digital zero-crossing detection to synchronize MOSFET turn-on with transformer reset minima.

Use Value: Reduces secondary rectifier reverse recovery losses by >30% versus fixed-frequency flyback, extending diode lifetime and improving efficiency at 230VAC input.

Set-Top Box AC/DC Adapter

Compact Wall Adapter (USB-C PD ancillary)

Use Scenario: 15W–30W universal-input adapter supplying 12V/3.3V rails for video decoding, HDMI interface, and memory subsystems.

IC Role / Device Role / Timing Role: Quasi-resonant PWM controller with Active Burst Mode enabling compliance with DOE Level VI and EU CoC Tier 2 standby requirements.

Use Value: Delivers <75mW no-load power consumption while maintaining ±5% output regulation across line/load transients without auxiliary bias winding redesign.

Use Scenario: Low-cost 10W wall adapter supporting USB-A charging and auxiliary functions in multi-port chargers.

IC Role / Device Role / Timing Role: Integrated HV CoolMOS® and controller reduce component count to <25 parts, enabling sub-20mm height designs with DIP-8 footprint.

Use Value: Enables full production qualification with only one critical active component - simplifies supply chain and eliminates gate driver matching concerns.

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
ICE2QS03G	Same CoolSET®-Q1 family but with 3A integrated CoolMOS® (R_DS(on) = 2.8Ω); lower max power rating (32.6W @ 230VAC)	Targeted at sub-20W applications like streaming sticks and low-power IPTV boxes where thermal headroom is constrained	Select when board space is limited and full 56.4W capability is unnecessary - reduces cost and improves light-load efficiency
ICE3B0565J	Fixed-frequency PWM controller with external MOSFET drive; no integrated HV switch; requires separate 650V MOSFET and startup circuit	Suitable for designs requiring higher peak current (>5A) or custom gate drive optimization not possible with monolithic integration	Choose when flexibility in MOSFET selection, thermal partitioning, or failure mode isolation outweighs BOM reduction benefits

Compared with ICE2QR1765, ICE2QS03G offers lower no-load power but reduced output capability, while ICE3B0565J trades integration for design flexibility and higher current scalability - making ICE2QR1765 optimal for cost-sensitive, mid-power quasi-resonant SMPS where reliability and EMI performance are prioritized.

Availability

ICE2QR1765 is available at Aetrix Electronics and suitable for LCD monitor power supplies, Blu-ray player SMPS, and set-top box AC/DC adapters requiring stable component supply, long-term lifecycle support, and qualified industrial-grade packaging.

Supply support for ICE2QR1765 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.

The CoolSET®-Q1 product line was engineered specifically for high-efficiency, low-standby-power off-line SMPS in consumer electronics, integrating HV power switches and digital control logic to eliminate discrete startup and gate-drive components.

FAQ

What is the maximum continuous output power achievable with ICE2QR1765 in a standard DIP-8 layout?

The ICE2QR1765 supports up to 56.4W maximum input power at 230VAC ±15% with T_a=50°C and no added copper heatsink area. Real-world continuous output power depends on transformer design, cooling, and efficiency - typical designs deliver 45–48W sustained output with <50°C case temperature rise on 2-layer 1oz FR4.

How does the Active Burst Mode reduce standby power, and what is its impact on output voltage ripple?

Active Burst Mode disables switching cycles when FB voltage falls below 1.25V, reducing average VCC consumption to <1mA. Output voltage ripple remains tightly controlled (±15mV typical) because burst ratio and pulse width are digitally adjusted based on load - unlike analog burst modes, it avoids audible noise and maintains regulation stability.

Can Pin 6 (n.c.) be used as a ground or left floating in PCB layout?

Pin 6 is explicitly designated "not connected" in the datasheet and contains no internal bond wire or circuit connection. It must remain unconnected - neither grounded nor routed - to avoid parasitic coupling or mechanical stress on the package. PCB land pattern should omit solder mask opening and avoid copper pour underneath.

What protection mechanisms activate during transformer short-winding, and how is recovery handled?

Transformer short-winding triggers immediate latch-off protection via CS pin voltage monitoring during MOSFET on-time - if V_CS exceeds 1.2V before demagnetization completes, the IC shuts down permanently until power cycle. Recovery requires full VCC discharge and re-application of input voltage; no auto-restart occurs to prevent repeated fault stress on primary components.

ICE2QR1765 Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: CoolMOS™, CoolSET™-Q1

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

Packaging:: Tube

Product Status:: Obsolete

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):: 56.4 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-8

Mounting Type:: Through Hole

ICE2QR1765 FAQ

1.How can I place an order for ICE2QR1765 through Aetrix?

Please submit a Request for Quotation (RFQ) for ICE2QR1765 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 ICE2QR1765 reliable?

The price and inventory of ICE2QR1765 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ICE2QR1765 is usually 5 days.

3.What payment methods are accepted for ICE2QR1765?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ICE2QR1765 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ICE2QR1765?

ICE2QR1765 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ICE2QR1765 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 ICE2QR1765?

For technical support, including ICE2QR1765 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ICE2QR1765 requirements.

6.How does Aetrix verify that ICE2QR1765 is sourced from the original manufacturer or authorized distributors?

All ICE2QR1765 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 ICE2QR1765 meets industry standards.

7.What is the process for return or replacement of ICE2QR1765?

All ICE2QR1765 units undergo pre-shipment inspection (PSI). If there is an issue with ICE2QR1765, 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 ICE2QR1765 part is unused and in its original packaging.

Return procedure for ICE2QR1765:

1.Submit a request within 90 days.

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

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