Infineon Technologies ICE3A5565I

Overview

ICE3A5565I from Infineon Technologies is a high-power off-line SMPS current-mode controller integrating a 650V depletion CoolMOS™ transistor and active burst-mode control, delivering 240W input power at 230VAC ±15% with 100kHz fixed switching frequency and 0.79Ω R_DS(on) at 25°C. It targets primary-side regulation in open-frame AC/DC adapters and industrial power supplies requiring <100mW standby power and robust auto-restart protection.

For engineers reviewing the ICE3A5565I datasheet, ICE3A5565I pinout, ICE3A5565I application, or ICE3A5565I equivalent, this device supports rapid load-jump response in Active Burst Mode, precise ±5% peak current limiting, isolated drain packaging for enhanced creepage, and user-defined soft-start-critical for high-reliability 100–240W SMPS designs.

Technical Context

The ICE3A5565I implements a fixed-frequency (100kHz) current-mode PWM architecture with internal oscillator, leading-edge blanking, and propagation delay compensation to ensure accurate peak-current sensing under fast transient conditions. Its integrated 650V CoolMOS™ enables direct high-voltage startup via an internal depletion-mode cell, eliminating external start-up resistors.

Control logic includes adjustable blanking window timing to suppress false overcurrent triggers during high-load transients, and five independent auto-restart protection modes-overtemperature, VCC overvoltage, output open-loop, overload, and VCC undervoltage-each with dedicated fault latching and recovery behavior.

Key Specifications

Pinout & Package

ICE3A5565I uses PG-TO220-6-46 (I2Pak) package with isolated drain terminal and wide creepage distance for reinforced insulation. The drain pin (Pin 1) is electrically isolated from the package tab, enabling direct mounting to heatsink without insulating pad.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ICE3A5565P, the ICE3A5565I offers superior isolation and thermal performance due to its isolated drain and wider creepage; versus ICE3B5565I, it delivers higher power density and faster transient response at the cost of marginally higher conducted EMI.

Availability

ICE3A5565I is available at Aetrix Electronics and suitable for LCD TV power supplies, industrial AC/DC adapters, and LED streetlight drivers requiring stable component supply, long-term lifecycle support, and RoHS-compliant manufacturing.

Supply support for ICE3A5565I 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 leader specializing in power management, automotive, and industrial control ICs, with global manufacturing and quality certifications including ISO 9001 and IATF 16949.

The CoolSET™-F3 product line was designed for high-efficiency, low-standby-power off-line SMPS in consumer, industrial, and lighting applications-integrating controller and high-voltage switch to reduce system complexity and bill-of-materials cost.

FAQ

What is the maximum continuous output power achievable with ICE3A5565I in an open-frame design?

The ICE3A5565I supports up to 240W continuous input power at 230VAC ±15% under defined thermal conditions: ambient temperature 50°C, junction temperature 125°C, and external heatsink thermal resistance of 2.7K/W. This corresponds to approximately 200–220W DC output depending on topology efficiency and transformer design.

Does ICE3A5565I require an external startup resistor?

No. ICE3A5565I integrates a depletion-mode CoolMOS™ startup cell that draws initial current directly from the rectified AC line, eliminating the need for external high-voltage startup resistors and associated power loss and board space.

How does the adjustable blanking window improve system reliability?

The blanking window-set by an external RC network on the SoftS pin-delays current-sense comparator activation after each switching edge, preventing false overcurrent trips caused by transformer leakage inductance spikes during high dv/dt load steps, thereby avoiding unnecessary auto-restart cycles.

Can ICE3A5565I operate with standard optocoupler-based feedback without additional circuitry?

Yes. The FB pin accepts standard optocoupler emitter current (0–1mA) and features an internal error amplifier with 2.5V reference. No external biasing or level-shifting components are needed-direct connection to TL431-based feedback networks is fully supported per datasheet Figure 12.