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

Infineon Technologies ICE3AS02

Name: ICE3AS02
Brand: Infineon Technologies
SKU: ICE3AS02
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: ICE3AS02

Manufacturer:: Infineon Technologies

Category:: AC DC Converters, Offline Switches

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

Datasheet:: ICE3AS02.pdf

Description:: IC OFFLINE SWITCH FLYBACK 8DIP

Quantity:: RFQ Add To RFQ list

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Inventory:1,560

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Product details

Overview

ICE3AS02 from Infineon Technologies is a fixed-frequency (100 kHz) off-line SMPS current-mode PWM controller with integrated 500 V high-voltage startup cell, active burst mode for <100 mW standby power, ±5% peak current limiting tolerance, and auto-restart protection for overtemperature, VCC over/undervoltage, and open-loop conditions - used in universal-input AC/DC adapters and auxiliary power supplies.

For engineers reviewing the ICE3AS02 datasheet, ICE3AS02 pinout, ICE3AS02 application, or ICE3AS02 equivalent, key selection criteria include its integrated HV startup eliminating external resistors, adjustable blanking window via SoftS capacitor, precise current sensing with leading-edge blanking, and dual-package availability (PG-DIP-8 and PG-DSO-8) for layout flexibility in cost-sensitive consumer and industrial SMPS designs.

Technical Context

The ICE3AS02 implements current-mode control with internal oscillator fixed at 100 kHz, max 72% duty cycle, and propagation-delay-compensated peak current sensing to maintain stable power limit across 85–270 VAC input range. Its control unit integrates active burst mode triggered by FB voltage, enabling immediate load-jump response without output blackout.

Startup relies on an internal 500 V HV cell delivering 1.05 mA charge current to VCC until UVLO threshold (15 V) is reached, after which the cell disables - reducing no-load losses. Protection logic uses SoftS pin for both soft-start timing and auto-restart error detection, with blanking window configurable via external capacitor.

Key Specifications

Parameter	Value and Actual Design Meaning
Switching Frequency	100 kHz fixed - enables compact magnetics and predictable EMI profile in universal-input SMPS.
Startup Voltage Range	500 V HV input - eliminates external high-voltage startup resistor and associated power loss.
Current Limit Tolerance	±5% overall - allows accurate transformer and MOSFET sizing without overdesign for wide-input applications.
Standby Power	<100 mW at no load - achieved via active burst mode with continuous regulation and optocoupler feedback retention.
VCC Operating Range	8.5 V to 21 V - supports robust operation across brownout and surge conditions with 6.5 V hysteresis.
Max Duty Cycle	72% - balances efficiency and transformer reset margin in discontinuous conduction mode flyback designs.
Leading Edge Blanking	220 ns - suppresses switching noise-induced false current-limit triggering during MOSFET turn-on.

Pinout & Package

ICE3AS02 is available in two industry-standard packages: PG-DIP-8 (through-hole) and PG-DSO-8 (surface-mount). Pin 4 and 5 are internally shorted in PG-DIP-8; PG-DSO-8 includes a dedicated N.C. pin (Pin 6) and separates HV and Gate functions across distinct pins.

Pin/Terminal	Circuit Role	Design Meaning
SoftS	Soft-start timing & auto-restart trigger	External capacitor sets soft-start duration and blanking window for high-load transients - no additional components needed.
FB	Feedback input	Directly controls duty cycle and activates active burst mode below ~4.0 V - retains optocoupler-based regulation in standby.
CS	Current sense input	Monitors source resistor voltage; triggers shutdown at 0.85 V threshold with 220 ns leading-edge blanking.
HV	High-voltage startup input	Accepts rectified AC line up to 500 V; powers internal startup cell until VCC reaches 15 V.
Gate	MOSFET gate driver output	Drives external PowerMOS with typical 0.72 duty cycle limit - optimized for flyback primary-side switching.
VCC	Controller supply	Powered by auxiliary winding; regulated between 8.5 V and 21 V - enables self-sustaining operation post-startup.
GND	Signal ground reference	Common return for CS, FB, SoftS, and internal bias - requires low-impedance PCB connection to minimize noise coupling.

Key Features

Feature	Design Value
Integrated 500 V startup cell	Eliminates external HV resistor, reducing BOM count and no-load power loss by removing ~1 mA standby current path.
Active Burst Mode	Maintains closed-loop regulation at light load using same optocoupler - achieves <1% output ripple and zero black-out during load jumps.
Adjustable blanking window	Configured via single SoftS capacitor - disables overload detection during transient load steps, preventing false auto-restart.
Precision peak current limiting	±5% tolerance with propagation delay compensation - ensures consistent power limit across input voltage range, avoiding transformer overdesign.
Auto Restart Protection	Single-pin (SoftS) fault detection for VCC OV/UV, overtemperature, open-loop, and overload - resets automatically when fault clears.

Applications

USB-C Wall Adapter

Smart TV Auxiliary Supply

Use Scenario: 5 V/3 A USB-C charging adapter accepting 85–270 VAC input with Energy Star Tier 2 compliance.

IC Role / Device Role / Timing Role: Primary-side PWM controller implementing current-mode flyback with active burst mode for sub-100 mW no-load consumption.

Use Value: Integrated HV startup and precise current limit reduce component count and improve efficiency at light loads - meeting strict EU CoC v5 requirements.

Use Scenario: 12 V/1 A standby rail powering microcontroller, IR receiver, and memory in smart television mainboard.

IC Role / Device Role / Timing Role: Off-line SMPS controller managing auxiliary power with fast wake-up response and thermal foldback protection.

Use Value: Adjustable blanking window prevents nuisance tripping during HDMI hot-plug transients; auto-restart ensures safe recovery from brownout events.

LED Driver Power Supply

Industrial IoT Gateway PSU

Use Scenario: Constant-voltage LED driver for commercial lighting operating across universal AC input with low THD.

IC Role / Device Role / Timing Role: Current-mode controller regulating flyback output with tight current limit tolerance to stabilize LED string current.

Use Value: ±5% current limit accuracy enables consistent LED brightness without secondary-side current sensing - lowering system cost.

Use Scenario: 5 V/2 A isolated power supply for edge gateway supporting Zigbee, BLE, and Ethernet interfaces.

IC Role / Device Role / Timing Role: Primary-side SMPS controller with robust protection for unattended remote deployment in variable ambient temperatures.

Use Value: Thermal shutdown and auto-restart prevent permanent failure during enclosure overheating; RoHS-compliant plating meets industrial environmental standards.

Equivalent & Alternatives

The following parts are listed as comparable options for similar off-line SMPS current-mode controller applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
ICE3BS02	67 kHz fixed frequency, identical pinout and protection features - lower switching loss but larger magnetics required.	Better suited for higher-power (>15 W) flyback designs where EMI filtering is prioritized over size.	Select ICE3BS02 when transformer size is less critical than conducted EMI performance at full load.
ICE3AS02G	Same 100 kHz frequency and functionality, but in PG-DSO-8 package with N.C. pin instead of dual HV pins.	Enables surface-mount assembly and improved thermal dissipation in space-constrained layouts.	Choose ICE3AS02G for automated SMT production and enhanced board-level reliability in consumer-grade products.

Compared with ICE3BS02 and ICE3AS02G, the ICE3AS02 offers through-hole compatibility and dual HV pins for simplified DIP-8 layout, making it optimal for prototyping, low-volume industrial supplies, and legacy board upgrades requiring mechanical drop-in replacement.

Availability

ICE3AS02 is available at Aetrix Electronics and suitable for USB-C wall adapters, smart TV auxiliary supplies, LED driver power supplies, and industrial IoT gateway PSUs requiring stable component supply across extended product lifecycles.

Supply support for ICE3AS02 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 ICE3 F3 series was designed specifically for cost-optimized, high-efficiency off-line SMPS in consumer and industrial applications - emphasizing integrated startup, ultra-low standby power, and robust protection without external components.

FAQ

What is the purpose of the SoftS pin on ICE3AS02?

The SoftS pin serves dual functions: it sets soft-start duration via an external capacitor during power-up, and acts as the fault detection node for auto-restart mode. During operation, the same capacitor defines the adjustable blanking window that temporarily disables overload protection during high-current transients - preventing false triggering while maintaining safety.

How does the integrated 500 V startup cell improve efficiency?

The integrated 500 V startup cell draws 1.05 mA from the HV pin only until VCC reaches 15 V, then switches off completely. This eliminates the constant power loss of an external high-voltage resistor, directly reducing no-load consumption and enabling sub-100 mW standby power - critical for meeting international energy regulations like EU CoC and DOE Level VI.

Can ICE3AS02 operate without an optocoupler in the feedback loop?

No - ICE3AS02 requires an optocoupler-connected FB pin for primary-side regulation and active burst mode control. The FB signal directly modulates PWM duty cycle and determines burst activation threshold (~4.0 V), so isolated feedback is mandatory for stable output voltage regulation and light-load efficiency optimization.

What is the maximum allowable VCC voltage for continuous operation?

The absolute maximum VCC voltage is 21 V, and continuous operation is guaranteed within 8.5 V to 21 V. Exceeding 21 V risks permanent damage; the device enters auto-restart mode if VCC rises above 15 V during fault conditions, but normal regulation requires staying within the specified operating range to avoid undervoltage lockout or overvoltage shutdown.

ICE3AS02 Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: CoolSET®F3

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

Packaging:: Tube

Product Status:: Obsolete

Output Isolation:: Isolated

Internal Switch(s):: No

Voltage - Breakdown:: -

Topology:: Flyback

Voltage - Start Up:: 15 V

Voltage - Supply (Vcc/Vdd):: 8.5V ~ 21V

Duty Cycle:: 72%

Frequency - Switching:: 100kHz

Power (Watts):: -

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

Control Features:: Soft Start

Operating Temperature:: -25°C ~ 130°C (TJ)

Grade:: -

Qualification:: -

Supplier Device Package:: PG-DIP-8

Mounting Type:: Through Hole

ICE3AS02 FAQ

1.How can I place an order for ICE3AS02 through Aetrix?

Please submit a Request for Quotation (RFQ) for ICE3AS02 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 ICE3AS02 reliable?

The price and inventory of ICE3AS02 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ICE3AS02 is usually 5 days.

3.What payment methods are accepted for ICE3AS02?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ICE3AS02 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ICE3AS02?

ICE3AS02 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ICE3AS02 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 ICE3AS02?

For technical support, including ICE3AS02 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ICE3AS02 requirements.

6.How does Aetrix verify that ICE3AS02 is sourced from the original manufacturer or authorized distributors?

All ICE3AS02 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 ICE3AS02 meets industry standards.

7.What is the process for return or replacement of ICE3AS02?

All ICE3AS02 units undergo pre-shipment inspection (PSI). If there is an issue with ICE3AS02, 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 ICE3AS02 part is unused and in its original packaging.

Return procedure for ICE3AS02:

1.Submit a request within 90 days.

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

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