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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > PFC (Power Factor Correction)

Infineon Technologies ICE2QS01FKLA1

Name: ICE2QS01FKLA1
Brand: Infineon Technologies
SKU: ICE2QS01FKLA1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: ICE2QS01FKLA1

Manufacturer:: Infineon Technologies

Category:: PFC (Power Factor Correction)

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

Datasheet:: ICE2QS01FKLA1.pdf

Description:: IC PFC CTRLR 80KHZ 8DIP

Quantity:: RFQ Add To RFQ list

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Inventory:3,115

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Product details

Overview

ICE2QS01FKLA1 from Infineon Technologies is a quasi-resonant PWM controller IC for off-line flyback switch-mode power supplies, featuring integrated power cell, digital frequency reduction, active burst mode, and comprehensive protection. It delivers <1 W standby input power, supports 85–265 VAC input, operates in quasiresonant mode down to very light load, and targets LCD/CRT TV and notebook adapter applications.

For engineers reviewing the ICE2QS01FKLA1 datasheet, ICE2QS01FKLA1 pinout, ICE2QS01FKLA1 application, or ICE2QS01FKLA1 equivalent, key selection criteria include its HV-start capability, zero-crossing–based switching timing, digital soft-start (24 ms), cycle-by-cycle current limiting, and latch-off vs. auto-restart protection modes.

Technical Context

The ICE2QS01FKLA1 implements a digitally controlled quasi-resonant flyback topology with zero-crossing detection (ZC pin) to enable valley-switching, reducing switching losses. Its up/down counter dynamically adjusts switching frequency based on regulation voltage (REG pin), enabling digital frequency reduction as load decreases.

It integrates a high-voltage power cell (HV pin) that pre-charges VCC at startup and sustains IC operation during latch-off or low-output-voltage standby. Protection logic includes auto-restart for VCC over/under-voltage and open-loop conditions, plus latch-off for output overvoltage and short-winding faults.

Key Specifications

Parameter	Value and Actual Design Meaning
Topology	Quasi-resonant flyback PWM controller with valley-switching capability
Input Voltage Range	85–265 VAC rectified bus compatible via HV pin (700 V abs max)
Standby Power	<1 W input power enabled by active burst mode and power cell support
Soft-Start Time	24 ms digital time-based soft-start with 8-step reference ramp (1.35 V → 4.15 V)
VCC Operating Range	9.5–25 V with auto-restart UVLO (V_VCCUVP = 8.5 V) and OVP (V_VCCOVP = 30 V)
Protection Modes	Latch-off for output OVP & short-winding; auto-restart for VCC OVP/UVP & open-loop overload
Gate Drive Output	OUT pin drives external MOSFET with typical 1 A sink/source capability

Pinout & Package

ICE2QS01FKLA1 is housed in an 8-pin PG-DIP-8 (plastic dual-in-line package) with 0.3 inch body width and standard through-hole mounting footprint.

Pin/Terminal	Circuit Role	Design Meaning
1 ZC	Zero-Crossing Input	Connects to auxiliary winding via RC network; triggers valley-switching and enables output OVP detection
2 REG	Regulation Feedback	Carries optocoupler-derived feedback signal; controls frequency reduction, burst entry, and open-loop protection
3 CS	Current Sense Input	Monitors primary-side shunt voltage; enables cycle-by-cycle peak current limit and short-winding protection
4,5 HV	High-Voltage Supply Input	Accepts rectified bus voltage; powers internal power cell for VCC pre-charge and standby supply
6 OUT	Gate Driver Output	PWM output driving external MOSFET gate; designed for fast turn-on/turn-off with 1 A drive strength
7 VCC	IC Supply Voltage	Power rail for internal circuitry; sourced from power cell (startup/burst) or auxiliary winding (normal operation)
8 GND	Signal Ground Reference	Common return path for all analog and digital blocks; must be low-impedance connection to power ground

Key Features

Feature	Design Value
Integrated Power Cell	Enables reliable VCC pre-charge at startup and continuous IC operation during latch-off or low-output-voltage standby
Digital Frequency Reduction	Reduces switching frequency progressively with decreasing load while maintaining quasi-resonant operation
Active Burst Mode	Delivers ultra-low standby power (<1 W) with controllable output ripple via regulated burst ratio
Built-in Digital Soft-Start	24 ms programmable soft-start prevents transformer saturation and reduces stress on MOSFET/diode
Foldback Correction	Adjusts current limit threshold dynamically to maintain stable regulation under varying line/load conditions

Applications

LCD TV Power Supply

Notebook Adapter

Use Scenario: Off-line AC-DC converter delivering 12–24 V at 3–5 A for main logic board and backlight inverter.

IC Role / Device Role / Timing Role: Quasi-resonant PWM controller synchronizing MOSFET switching to transformer demagnetization valleys via ZC pin.

Use Value: Achieves >85% full-load efficiency and <0.5 W no-load consumption using active burst mode and digital frequency scaling.

Use Scenario: Compact 19 V/3.42 A adapter powering ultraportable notebooks with strict CoC Tier 2 and Energy Star 6.0 compliance.

IC Role / Device Role / Timing Role: Primary-side controller implementing HV-start, valley switching, and precise regulation without secondary-side sensing.

Use Value: Eliminates need for auxiliary bias winding during standby, reducing BOM count and improving reliability under brownout conditions.

CRT TV SMPS

Industrial Monitor PSU

Use Scenario: 115 VAC/230 VAC universal input supply delivering 130 V for horizontal deflection and 12 V for logic in CRT displays.

IC Role / Device Role / Timing Role: Core timing and protection controller managing high-voltage flyback operation with robust overvoltage and short-circuit response.

Use Value: Latch-off OVP ensures immediate shutdown on CRT anode overvoltage, preventing X-ray hazard and component damage.

Use Scenario: Ruggedized 24 V/5 A power supply for industrial HMI panels operating continuously in 0–60 °C ambient with EMI-sensitive sensors.

IC Role / Device Role / Timing Role: Primary-side regulated controller providing stable output despite wide input fluctuations and load transients.

Use Value: Auto-restart protection allows safe recovery from temporary overloads without manual reset, minimizing system downtime.

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
ICE2QS02G	Higher VCC OVP threshold (32 V vs. 30 V); identical pinout and feature set	Preferred where auxiliary winding voltage exceeds 28 V under worst-case load	Select when higher VCC OVP margin is required without changing layout or compensation
ICE3B0565J	Fixed-frequency (65 kHz) operation; no ZC pin or quasi-resonant control; integrated 650 V MOSFET	Suitable for cost-sensitive, lower-efficiency designs where valley switching is not mandatory	Choose for simplified design with integrated switch, accepting ~3–5% lower light-load efficiency

Compared with ICE2QS01FKLA1, ICE2QS02G offers extended VCC OVP headroom while maintaining full functional and pin compatibility, whereas ICE3B0565J trades quasi-resonant efficiency for integration and design simplicity-making it appropriate only where valley switching is non-critical.

Availability

ICE2QS01FKLA1 is available at Aetrix Electronics and suitable for LCD TV power supplies, notebook adapters, CRT TV SMPS, and industrial monitor PSUs requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.

Supply support for ICE2QS01FKLA1 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 ICE2QS series belongs to Infineon's CoolSET™ family of integrated quasi-resonant controllers, engineered specifically for high-efficiency, low-standby-power offline flyback converters in consumer and industrial power supplies.

FAQ

What is the function of the HV pin on ICE2QS01FKLA1?

The HV pin connects directly to the rectified mains bus and powers the internal high-voltage power cell. This cell pre-charges the VCC capacitor at startup and sustains IC operation during active burst mode or latch-off conditions when auxiliary winding voltage is insufficient. It eliminates the need for an external high-voltage start-up resistor, reducing component count and improving reliability.

How does active burst mode reduce standby power below 1 W?

Active burst mode dynamically regulates the number and duration of switching bursts based on output load and regulation voltage (REG pin). During light load, the controller enters extended idle periods between short bursts of quasi-resonant switching, minimizing switching and conduction losses. Combined with the power cell's ability to sustain VCC without auxiliary winding energy, this achieves sub-1-W input power while maintaining tight output voltage ripple control.

Can ICE2QS01FKLA1 operate without an auxiliary winding?

No-ICE2QS01FKLA1 requires an auxiliary winding for normal operation to supply VCC after startup. The HV pin's power cell only provides temporary VCC support during startup, burst mode, or fault conditions. Once the output reaches regulation, the auxiliary winding must deliver sufficient voltage to maintain VCC above 9.5 V; otherwise, VCC undervoltage protection triggers auto-restart.

What protection features are implemented with latch-off versus auto-restart behavior?

Latch-off protection (output overvoltage, short-winding) disables the OUT pin permanently until power cycle reset, ensuring safety-critical faults remain isolated. Auto-restart protection (VCC over/under-voltage, open-loop overload) disables switching temporarily, then attempts recovery every ~1 s-allowing transient faults like momentary overloads to clear without manual intervention while maintaining system uptime.

ICE2QS01FKLA1 Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: -

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

Packaging:: Tube

Product Status:: Obsolete

Mode:: -

Frequency - Switching:: 80kHz

Current - Startup:: 300 µA

Voltage - Supply:: 11V ~ 25V

Operating Temperature:: -25°C ~ 125°C

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: PG-DIP-8

ICE2QS01FKLA1 FAQ

1.How can I place an order for ICE2QS01FKLA1 through Aetrix?

Please submit a Request for Quotation (RFQ) for ICE2QS01FKLA1 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 ICE2QS01FKLA1 reliable?

The price and inventory of ICE2QS01FKLA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ICE2QS01FKLA1 is usually 5 days.

3.What payment methods are accepted for ICE2QS01FKLA1?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ICE2QS01FKLA1 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ICE2QS01FKLA1?

ICE2QS01FKLA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ICE2QS01FKLA1 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 ICE2QS01FKLA1?

For technical support, including ICE2QS01FKLA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ICE2QS01FKLA1 requirements.

6.How does Aetrix verify that ICE2QS01FKLA1 is sourced from the original manufacturer or authorized distributors?

All ICE2QS01FKLA1 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 ICE2QS01FKLA1 meets industry standards.

7.What is the process for return or replacement of ICE2QS01FKLA1?

All ICE2QS01FKLA1 units undergo pre-shipment inspection (PSI). If there is an issue with ICE2QS01FKLA1, 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 ICE2QS01FKLA1 part is unused and in its original packaging.

Return procedure for ICE2QS01FKLA1:

1.Submit a request within 90 days.

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

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