Infineon Technologies ICE2A265FKLA1

Overview

ICE2A265FKLA1 from Infineon Technologies is an off-line AC/DC current-mode PWM controller with integrated 650V CoolMOS™ power transistor, designed for flyback SMPS in low-power standby applications. It delivers 52W at 230VAC ±15%, features 100kHz switching frequency, 0.9Ω R_DS(on), and auto-restart protection against overload, open-loop, and overvoltage faults.

For engineers reviewing the ICE2A265FKLA1 datasheet, ICE2A265FKLA1 pinout, ICE2A265FKLA1 application, or ICE2A265FKLA1 equivalent, key selection criteria include its integrated high-voltage switch, precise ±5% peak current limiting, frequency reduction in standby mode (to 20–21.5kHz), thermal shutdown with auto-restart, and DIP-8 package compatibility with minimal external components.

Technical Context

The ICE2A265FKLA1 implements a current-mode control architecture with internal leading-edge blanking and propagation delay compensation to ensure accurate peak current sensing across line and load variations. Its oscillator supports fixed 100kHz operation with frequency reduction during standby to suppress audible noise while maintaining output regulation.

The integrated protection unit independently monitors FB, Isense, and VCC to trigger auto-restart on overvoltage (no-load open-loop), overload (short-circuit), or thermal fault conditions. The SoftS pin serves dual function-initiating soft-start at power-up and controlling restart timing after fault detection-without requiring external timing capacitors.

Key Specifications

Pinout & Package

ICE2A265FKLA1 is supplied in PG-DIP-8 package (8-pin dual in-line plastic) with creepage-enhanced layout and isolated drain pins. Pin 4 and Pin 5 are both connected to the CoolMOS™ drain terminal; Pin 6 is not connected.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ICE2A265Z and ICE2B265, ICE2A265FKLA1 offers optimal balance of power density (52W in DIP-8), EMI control (100kHz with soft driving), and thermal robustness (dual Drain pins, 72% duty cycle), making it preferred for universal-input adapters targeting ERP Tier 2 and IEC 61000-3-2 Class D compliance.

Availability

ICE2A265FKLA1 is available at Aetrix Electronics and suitable for USB wall adapters, smart home power supplies, LED driver modules, and industrial sensor power requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.

Supply support for ICE2A265FKLA1 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-efficiency offline SMPS in consumer and industrial power supplies, integrating HV power switches with advanced protection and low-standby control logic.

FAQ

What is the maximum continuous output power achievable with ICE2A265FKLA1 in a standard DIP-8 open-frame design?

At 230VAC ±15% input and T_a = 75°C with 6cm² PCB copper area, ICE2A265FKLA1 delivers 32W continuous output power. This rating accounts for thermal limits (T_j ≤ 125°C), conduction and switching losses in the integrated 0.9Ω CoolMOS™, and derating for safety margins in non-heat-sinked configurations.

Does ICE2A265FKLA1 require an external startup resistor, and what is the VCC startup threshold?

Yes - an external high-voltage startup resistor is required to charge the VCC capacitor from the rectified mains until the auxiliary winding takes over. The IC starts switching when VCC reaches 8.5V (typical), and remains active down to 7.8V (min), with hysteresis preventing oscillation near the UVLO threshold.

How does the auto-restart mode behave after an overvoltage fault is detected?

Upon overvoltage detection (e.g., optocoupler failure causing no feedback), the protection unit disables the driver and initiates auto-restart after a delay set by the SoftS capacitor. Restart attempts occur at ~1Hz intervals until regulation is restored; each attempt includes full soft-start to prevent inrush stress on the transformer and output capacitor.

Can ICE2A265FKLA1 be used in quasi-resonant (QR) flyback topologies?

No - ICE2A265FKLA1 operates exclusively in fixed-frequency current-mode PWM mode. It lacks valley-switching detection, variable frequency control, or demagnetization sensing circuitry required for QR operation. For QR designs, Infineon's ICE5QSBGx series is recommended instead.