Infineon Technologies ICE2B0565FKLA1

Overview

ICE2B0565FKLA1 from Infineon Technologies is an off-line SMPS current mode controller with integrated 650V CoolMOS™, designed for primary-side regulation in low-power AC/DC adapters and auxiliary power supplies. It delivers 23W at 230VAC ±15%, operates at 67kHz switching frequency, features adjustable peak current limiting (±5% tolerance), and supports low-power standby mode compliant with European Commission requirements.

For engineers reviewing the ICE2B0565FKLA1 datasheet, ICE2B0565FKLA1 pinout, ICE2B0565FKLA1 application, or ICE2B0565FKLA1 equivalent, key selection criteria include its integrated high-voltage switch, auto-restart protection architecture, soft-start programmability, and DIP-8 package suitability for cost-sensitive, creepage-compliant offline flyback designs.

Technical Context

The ICE2B0565FKLA1 implements a current-mode PWM control architecture with internal leading-edge blanking and propagation delay compensation to ensure stable cycle-by-cycle current sensing. Its oscillator supports fixed 67kHz operation with frequency reduction down to 20kHz/21.5kHz in standby to suppress audible noise while maintaining output regulation.

The integrated protection unit enables auto-restart behavior during open-loop, overload, or overvoltage faults-triggered by feedback loss, secondary short, or VCC overvoltage-and includes thermal shutdown with hysteresis and precise peak current limiting via external sense resistor.

Key Specifications

Pinout & Package

ICE2B0565FKLA1 is housed in a PG-DIP-8 package (8-pin dual in-line plastic) with creepage-enhanced spacing and isolated drain terminals. The package requires no heatsink for ≤23W operation and supports through-hole mounting with standard wave soldering.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ICE2B0565Z and ICE2A0565, the ICE2B0565FKLA1 offers optimal balance of creepage safety, thermal robustness via dual Drain pins, and low-noise 67kHz operation-making it preferred for certified consumer and industrial adapters where reliability and regulatory compliance are prioritized over minimal footprint or peak efficiency.

Availability

ICE2B0565FKLA1 is available at Aetrix Electronics and suitable for USB wall adapters, smart home sensor power supplies, and industrial PLC auxiliary rails requiring stable component supply, long-term lifecycle support, and full compliance with EU ErP and CoC standards.

Supply support for ICE2B0565FKLA1 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™-F2 product line was engineered specifically for cost-sensitive, high-reliability offline SMPS applications-emphasizing integrated HV switches, ultra-low standby power, and comprehensive fault recovery without external supervision.

FAQ

What is the maximum continuous output power achievable with ICE2B0565FKLA1 in a DIP-8 design?

The ICE2B0565FKLA1 delivers up to 23W at 230VAC ±15% under defined thermal conditions: ambient temperature of 75°C, junction temperature ≤125°C, and 6 cm² copper area on the PCB. This rating assumes proper layout, adequate ventilation, and use of recommended snubber and feedback networks per the datasheet's application notes.

Does ICE2B0565FKLA1 require an external startup resistor?

Yes-ICE2B0565FKLA1 uses an external high-voltage startup resistor connected between the AC rectified input and the VCC pin to charge the VCC capacitor until the auxiliary winding takes over. The resistor value must be selected to ensure sufficient initial current for startup while limiting power dissipation during normal operation, typically in the 470 kΩ–1 MΩ range depending on input voltage.

How does the auto-restart protection behave during an output short-circuit condition?

During sustained output short-circuit, the ICE2B0565FKLA1 enters auto-restart mode: it disables switching, waits a fixed interval (~1 s), then attempts restart. If the fault persists, it repeats this cycle indefinitely. This prevents thermal runaway while allowing automatic recovery if the short is removed-eliminating need for manual reset or external latch circuits.

Can the switching frequency be adjusted externally?

No-the ICE2B0565FKLA1 operates at a fixed 67kHz internal oscillator frequency; it does not support external frequency programming or synchronization. Frequency reduction occurs automatically only in standby mode (to ~20–21.5kHz) to minimize audible noise and no-load losses, and cannot be disabled or modified via external components.