Infineon Technologies ICE2B165FKLA1

Overview

ICE2B165FKLA1 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 31W output power at 230VAC ±15%, operates at 67kHz switching frequency, features 3.0Ω R_DS(on), and supports low-power standby mode compliant with European Commission requirements.

For engineers reviewing the ICE2B165FKLA1 datasheet, ICE2B165FKLA1 pinout, ICE2B165FKLA1 application, or ICE2B165FKLA1 equivalent, key selection criteria include its integrated high-voltage switch, precise ±5% peak current limiting, auto-restart protection architecture, and DIP-8 package suitability for cost-sensitive, open-frame power supplies up to 18W continuous rating.

Technical Context

The ICE2B165FKLA1 implements a current-mode PWM control architecture with internal leading-edge blanking and propagation delay compensation to ensure accurate current sensing across line and load variations. Its oscillator supports fixed 67kHz operation with frequency reduction to ≥20kHz in standby to suppress audible noise while maintaining output regulation.

Protection is managed by a dedicated unit enabling auto-restart on overload, open-loop, overvoltage, or thermal shutdown events. The integrated CoolMOS™ drain-source path (650V, 3.0Ω typ) eliminates external HV MOSFET layout complexity and reduces component count in universal-input (85–265VAC) offline SMPS designs.

Key Specifications

Pinout & Package

ICE2B165FKLA1 uses the PG-DIP-8 package (8-pin dual in-line plastic), with creepage-enhanced spacing suitable for reinforced insulation in Class II applications. Pin 6 is NC; pins 4 and 5 are paralleled drain terminals for reduced thermal resistance and improved current handling.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ICE2B165Z and ICE2A165, the ICE2B165FKLA1 offers optimal balance of audible-noise suppression (67kHz + frequency reduction), creepage compliance (DIP-8), and thermal performance-making it preferred for cost-sensitive, open-frame consumer adapters requiring ERP Tier 2 compliance.

Availability

ICE2B165FKLA1 is available at Aetrix Electronics and suitable for USB wall adapters, smart home power supplies, and industrial control modules requiring stable component supply, long-term lifecycle support, and RoHS-compliant manufacturing.

Supply support for ICE2B165FKLA1 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 wafer fabrication facilities.

The CoolSET™-F2 product line targets cost-optimized, high-efficiency offline SMPS designs-specifically engineered to integrate HV power switches and controllers for universal-input flyback converters meeting global energy regulations.

FAQ

What is the maximum continuous output power achievable with ICE2B165FKLA1 in an open-frame design?

The ICE2B165FKLA1 delivers 18W continuous output power at T_a = 75°C, T_j = 125°C, and with 6 cm² copper area on the PCB. This rating assumes proper thermal layout, adequate ventilation, and adherence to Infineon's recommended snubber and layout guidelines for DIP-8 packages. Derating is required above 75°C ambient.

Does ICE2B165FKLA1 require an external startup resistor?

No-ICE2B165FKLA1 integrates a high-voltage startup current source that draws initial power directly from the rectified AC line via the Drain pin. Once V_CC reaches 12.5V, the internal controller enables normal operation and disables the startup current source, eliminating the need for an external high-voltage resistor.

How does the auto-restart mode respond to an output short-circuit condition?

Upon detecting overcurrent (via Isense) or overvoltage (via FB), the device enters auto-restart mode: the PWM driver is disabled, the internal oscillator pauses for a fixed timeout (~1 second), then attempts soft-started reactivation. This cycle repeats until fault clearance, preventing thermal runaway and enabling safe, hands-off recovery without secondary-side latch-off circuitry.

Can ICE2B165FKLA1 be used in quasi-resonant (QR) flyback topologies?

No-ICE2B165FKLA1 is a fixed-frequency current-mode controller with no valley-switching detection or variable-frequency QR control logic. It operates strictly at 67kHz with frequency reduction only in standby. For QR operation, Infineon's ICE5QSBGx or BD7682F series are purpose-built alternatives.