Infineon Technologies ICE2B265FKLA1

Overview

ICE2B265FKLA1 from Infineon Technologies is an off-line SMPS current mode controller with integrated 650V CoolMOS™, designed for primary-side regulation in AC/DC flyback converters. It delivers 52W output power at 230VAC ±15%, operates at 67kHz switching frequency, features 0.9Ω R_DS(on), and supports low-power standby mode compliant with European Commission requirements.

For engineers reviewing the ICE2B265FKLA1 datasheet, ICE2B265FKLA1 pinout, ICE2B265FKLA1 application, or ICE2B265FKLA1 equivalent, key selection criteria include integrated high-voltage MOSFET capability, precise ±5% peak current limiting, auto-restart protection architecture, and DIP-8 package compatibility with creepage-enhanced layout.

Technical Context

The ICE2B265FKLA1 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 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 via FB pin monitoring-and includes thermal shutdown with hysteresis. The Isense pin directly interfaces with the source of the internal CoolMOS™, enabling accurate current limiting without external amplification.

Key Specifications

Pinout & Package

ICE2B265FKLA1 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 under typical 52W operation and supports through-hole mounting for industrial reliability.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ICE2B265 and ICE2A265, the ICE2B265FKLA1 provides factory-traceable packaging, tighter process control for long-term reliability, and optimized 67kHz operation that balances efficiency, EMI, and audible noise-making it preferred for certified consumer and industrial power supplies.

Availability

ICE2B265FKLA1 is available at Aetrix Electronics and suitable for USB-C wall adapters, smart home power supplies, LED driver modules, and industrial control power requiring stable component supply, long-lifecycle support, and full Infineon factory traceability.

Supply support for ICE2B265FKLA1 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 electronics, 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 applications-emphasizing integration, protection robustness, and regulatory compliance in consumer and industrial power supplies.

FAQ

What is the maximum continuous output power achievable with ICE2B265FKLA1 in an open-frame design?

The ICE2B265FKLA1 delivers up to 52W continuous output power at 230VAC ±15% under specified thermal conditions: T_a = 75°C, T_j = 125°C, and 6 cm² copper area on the PCB. This rating assumes proper layout per Infineon's recommended footprint and thermal vias beneath the drain pins.

How does the SoftS pin function during fault recovery?

The SoftS pin serves dual roles: during startup, an external capacitor sets soft-start ramp time; during fault detection (e.g., open-loop), it controls auto-restart interval by discharging through an internal current source. Recovery occurs only after SoftS voltage falls below 1.2V, preventing rapid cycling.

Can ICE2B265FKLA1 operate without an optocoupler in primary-side regulation?

No-ICE2B265FKLA1 requires optocoupler feedback connected to the FB pin for closed-loop voltage regulation and overvoltage protection. The FB pin directly feeds both the PWM comparator and protection unit; removal disables regulation and triggers immediate auto-restart.

What is the purpose of the dual Drain pins (4 and 5) in the PG-DIP-8 package?

Pins 4 and 5 are electrically parallel drain connections to the internal CoolMOS™. They reduce effective package inductance and improve thermal spreading across the DIP-8 body, enabling higher power density without heatsink-critical for achieving 52W in compact adapters.