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

Infineon Technologies ICE2AS01G

Name: ICE2AS01G
Brand: Infineon Technologies
SKU: ICE2AS01G
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: ICE2AS01G

Manufacturer:: Infineon Technologies

Category:: AC DC Converters, Offline Switches

Package:: 8-SOIC (0.154", 3.90mm Width)

Datasheet:: ICE2AS01G.pdf

Description:: IC OFFLINE SWITCH FLYBACK 8DSO

Quantity:: RFQ Add To RFQ list

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Inventory:3,867

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Product details

Overview

ICE2AS01G from Infineon Technologies is a fixed-frequency, current-mode PWM controller IC for off-line SMPS applications, featuring 100 kHz switching frequency, internal leading-edge blanking (200 ns), ±5% peak current limit tolerance, and integrated soft-start with auto-restart protection. It operates from 85–270 VAC input via auxiliary winding-derived VCC and delivers precise regulation in low-power standby mode down to 21.5 kHz to meet Blue Angel energy norms.

For engineers reviewing the ICE2AS01G datasheet, ICE2AS01G pinout, ICE2AS01G application, or ICE2AS01G equivalent, this controller supports critical design tasks including standby power optimization, transformer size reduction via accurate current limiting, EMI mitigation through soft gate driving, and robust fault recovery in open-loop, overload, and overvoltage conditions.

Technical Context

This IC implements an enhanced current-mode control architecture where duty cycle is determined by comparing the amplified sense voltage (gain = 3.65) against feedback voltage (FB), with propagation delay compensation and superimposed voltage ramp for stable light-load regulation. The oscillator provides fixed 100 kHz operation in normal mode and reduces to 21.5 kHz in standby to suppress audible noise.

Its protection unit integrates latched thermal shutdown (>140°C), undervoltage lockout (13.5 V turn-on / 8.5 V turn-off), overvoltage protection (16.5 V VCC clamp), and auto-restart behavior triggered by FB pin monitoring - enabling self-recovery from open-loop, short-circuit, or no-load overvoltage faults without external circuitry.

Key Specifications

Parameter	Value and Actual Design Meaning
Switching Frequency	100 kHz nominal (normal mode); 21.5 kHz (standby mode) - enables optimized transformer design and audible-noise-free low-power operation.
Max Duty Cycle	72% - limits conduction time to prevent transformer saturation and ensure safe MOSFET switching margins.
VCC Operating Range	8.5 V to 21 V - supports wide-range auxiliary supply while incorporating 16.5 V overvoltage shutdown for startup safety.
Current Limit Tolerance	±5% overall - allows precise sizing of RSense and secondary diode, reducing BOM cost and thermal margin uncertainty.
Leading Edge Blanking	200 ns - eliminates false triggering from MOSFET switching spikes at Isense pin during turn-on transitions.
Soft-Start Duration	Internally controlled ramp on SoftS pin - ensures monotonic gate drive enablement and prevents inrush current overshoot.
Thermal Shutdown	Latched at Tj > 140°C - guarantees irreversible shutdown under sustained overtemperature, requiring power cycle reset.

Pinout & Package

ICE2AS01G is housed in a RoHS-compliant PG-DSO-8 (SOIC-8) surface-mount package with exposed pad for thermal enhancement and standard 1.27 mm pitch.

Pin/Terminal	Circuit Role	Design Meaning
1, 8	N.C.	No internal connection - must remain unconnected; floating or tied to GND per layout best practice.
2	SoftS	Soft-start timing capacitor node and auto-restart control input - sets startup ramp slope and determines restart interval after fault.
3	FB	Feedback input referenced to internal 4.0 V comparator threshold - receives optocoupler output to regulate secondary-side DC output voltage.
4	Isense	Current sense input with 200 ns blanking - monitors voltage across external RSense to enforce peak primary current limit.
5	Gate	High-current MOSFET gate driver output - capable of sourcing/sinking >1 A peak to directly drive CoolMOS™ or standard Power MOSFETs.
6	VCC	Internal bias supply input - powers all internal circuits; regulated internally from auxiliary winding via external CVCC capacitor.
7	GND	Primary-side power ground reference - serves as return path for Isense, Gate, and internal logic; requires low-inductance layout.

Key Features

Feature	Design Value
Adjustable peak current limit	Set via external RSense resistor - enables precise adaptation to MOSFET RDS(on) and transformer turns ratio without redesigning control loop.
Frequency reduction in standby	From 100 kHz → 21.5 kHz - lowers switching losses and core excitation to achieve sub-300 mW no-load consumption compliant with Blue Angel.
Integrated soft gate driving	Controlled slew rate on Gate pin - reduces EMI emissions and dv/dt stress on MOSFET and snubber components.
Auto-restart protection suite	Covers overload, open-loop, overvoltage, and thermal faults - eliminates need for external latch or supervisor IC in cost-sensitive AC/DC adapters.
Pb-free & RoHS-compliant plating	PG-DSO-8 package with lead-free terminations - meets global environmental compliance requirements without derating or assembly process changes.

Applications

AC/DC Adapter

USB Wall Charger

Use Scenario: 5–12 W universal-input offline adapter powering consumer electronics.

IC Role / Device Role / Timing Role: Primary-side PWM controller regulating output via optocoupler feedback; sets 100 kHz switching rhythm and enforces current limit per cycle.

Use Value: Enables compact transformer design using ±5% current limit accuracy and reduces no-load power to <250 mW via 21.5 kHz standby frequency.

Use Scenario: Single-port USB charging solution with CE/UL certification requirements.

IC Role / Device Role / Timing Role: Standalone current-mode controller managing constant-voltage/constant-current transition; coordinates gate drive timing with FB loop response.

Use Value: Delivers fast transient response and tight output regulation (±3%) using internal 6.5 V reference and propagation-delay-compensated current sensing.

Smart Home Power Supply

IoT Sensor Hub PSU

Use Scenario: Low-noise, always-on 3.3 V/5 V supply for Wi-Fi/BLE gateways with standby wake-up capability.

IC Role / Device Role / Timing Role: Primary-side controller maintaining regulation during deep sleep; initiates soft-start upon wake-up signal via FB line perturbation.

Use Value: Achieves <150 mW standby consumption and silent operation via 21.5 kHz frequency reduction - avoids audible coil whine in residential environments.

Use Scenario: Compact, sealed enclosure power supply for battery-less sensor nodes harvesting ambient energy.

IC Role / Device Role / Timing Role: Fault-tolerant controller ensuring continuous operation despite input ripple; uses auto-restart to recover from intermittent overloads.

Use Value: Guarantees system uptime with latched thermal shutdown and open-loop protection - prevents brownout-induced firmware corruption in edge devices.

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
ICE2BS01G	67 kHz switching frequency; same PG-DSO-8 package and pinout; identical protection features but lower frequency reduces EMI filter size at expense of transformer size.	Better suited for higher-output-power designs (>15 W) where lower frequency eases MOSFET switching loss and heatsink requirements.	Select when optimizing for thermal performance over minimum transformer volume; verify FB loop stability with reduced gain-bandwidth product.
UC3842BD1G	Voltage-mode control; no integrated frequency reduction or auto-restart; requires external components for soft-start, OVP, and thermal protection.	Requires additional BOM for protection functions and lacks standby optimization - suitable only for legacy designs or cost-insensitive prototyping.	Choose only if existing UC384x-based layout reuse is mandatory; expect +15% no-load power and added design validation effort for fault coverage.

Compared with ICE2BS01G, ICE2AS01G offers higher frequency for smaller magnetics but demands tighter layout for EMI; versus UC3842BD1G, it delivers integrated protection and standby efficiency at the cost of vendor-specific feature set and non-drop-in compatibility.

Availability

ICE2AS01G is available at Aetrix Electronics and suitable for AC/DC adapters, USB wall chargers, smart home power supplies, and IoT sensor hub PSUs requiring stable component supply, long-term lifecycle support, and RoHS-compliant manufacturing.

Supply support for ICE2AS01G 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.

ICE2AS01G belongs to Infineon's CoolSET™ family of integrated SMPS controllers, designed specifically for high-efficiency, low-standby-power offline converters targeting energy-efficient consumer and industrial power supplies.

FAQ

What is the purpose of the SoftS pin, and how is it used externally?

The SoftS pin serves dual functions: it hosts the soft-start timing capacitor (CSoft-Start) that controls the initial gate drive ramp at power-up, and acts as the auto-restart timer node during fault conditions. An external capacitor (typically 100 nF) is connected between SoftS and GND; its discharge rate after fault detection determines the restart interval. During normal operation, SoftS voltage ramps linearly until reaching ~5.3 V, at which point full-duty-cycle operation begins.

How does the ICE2AS01G achieve ±5% current limit accuracy?

This accuracy results from matched internal current-sense amplifier gain (3.65×), precision bandgap reference (6.5 V), and propagation delay compensation circuitry that cancels timing skew between Isense sampling and PWM latch reset. Combined with low-drift external RSense resistors (e.g., 1% metal film), the total system-level current limit error remains within ±5% across temperature (-25°C to +125°C) and line voltage (85–270 VAC).

Can ICE2AS01G operate without an optocoupler in the feedback path?

No - the FB pin requires a regulated voltage derived from secondary-side sensing, typically via optocoupler or TL431 shunt regulator. The internal FB comparator threshold is fixed at 4.0 V, and the device lacks primary-side regulation capability. Removing the optocoupler disables regulation and triggers immediate auto-restart due to open-loop detection at the FB pin.

What is the maximum allowable VCC voltage during startup, and what happens above that level?

The absolute maximum VCC voltage is 21 V, but the internal overvoltage protection activates at 16.5 V during startup. When VCC exceeds this threshold, the gate driver is disabled to prevent uncontrolled switching, while internal bias circuits remain active. Once VCC drops below 13.5 V (UVLO turn-on threshold), the IC reinitializes with full soft-start sequence - ensuring safe recovery from transient overvoltage events on the auxiliary winding.

ICE2AS01G Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: -

Package/Case:: 8-SOIC (0.154", 3.90mm Width)

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Output Isolation:: Isolated

Internal Switch(s):: No

Voltage - Breakdown:: -

Topology:: Flyback

Voltage - Start Up:: 13.5 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:: -40°C ~ 150°C (TJ)

Grade:: -

Qualification:: -

Supplier Device Package:: PG-DSO-8

Mounting Type:: Surface Mount

ICE2AS01G FAQ

1.How can I place an order for ICE2AS01G through Aetrix?

Please submit a Request for Quotation (RFQ) for ICE2AS01G 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 ICE2AS01G reliable?

The price and inventory of ICE2AS01G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ICE2AS01G is usually 5 days.

3.What payment methods are accepted for ICE2AS01G?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ICE2AS01G transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ICE2AS01G?

ICE2AS01G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ICE2AS01G 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 ICE2AS01G?

For technical support, including ICE2AS01G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ICE2AS01G requirements.

6.How does Aetrix verify that ICE2AS01G is sourced from the original manufacturer or authorized distributors?

All ICE2AS01G 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 ICE2AS01G meets industry standards.

7.What is the process for return or replacement of ICE2AS01G?

All ICE2AS01G units undergo pre-shipment inspection (PSI). If there is an issue with ICE2AS01G, 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 ICE2AS01G part is unused and in its original packaging.

Return procedure for ICE2AS01G:

1.Submit a request within 90 days.

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

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