Infineon Technologies ICE1CS02FKLA1

Overview

ICE1CS02FKLA1 from Infineon Technologies is a dual-stage off-line SMPS controller integrating average-current-mode PFC and current-mode PWM in a single IC. It delivers 65 kHz fixed-frequency PFC control with 95% max duty cycle and 130 kHz synchronizable PWM output with selectable 47%/60% max duty cycle, supporting Class D IEC 1000-3-2 compliance in AC-DC power supplies up to 300 W.

For engineers reviewing the ICE1CS02FKLA1 datasheet, ICE1CS02FKLA1 pinout, ICE1CS02FKLA1 application, or ICE1CS02FKLA1 equivalent, key selection criteria include its dual-loop compensation capability (PFC VCOMP/ICOMP and PWM FB/CS), integrated 5 V/12 mA VREF buffer, 1.5 A source / 2.0 A sink gate drivers, and brown-out protection with hysteresis via VINS/VINS_HYS.

Technical Context

The ICE1CS02FKLA1 implements a tightly coupled PFC+PWM architecture where the PFC section operates at half the PWM frequency (fpfc:fpwm = 1:2) via internal synchronization. Its average-current-mode PFC uses external voltage/current loop compensation networks on PFC VCOMP and PFC ICOMP pins, while the PWM section employs leading-edge blanking (220 ns), slope compensation (activated when VSYNC < 3.0 V), and pre-short protection timed by a capacitor on PWM Pre-Short.

Both sections share a common BiCMOS process enabling wide VCC operation (11–26 V), UVLO thresholds (12 V turn-on, 11 V shutdown), and integrated protection including OVP (3 V threshold on PFC OVP), open-loop detection, and over-current limiting with < ±5% tolerance. The 5 V VREF pin serves as both reference and PWM enable/disable control.

Key Specifications

Pinout & Package

ICE1CS02FKLA1 is housed in a PG-DIP-16-4 through-hole package (16-pin dual in-line, 0.6 inch width, 0.1 inch pin pitch), RoHS-compliant with Pb-free lead plating.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar PFC+PWM controller applications.

Compared with ICE2PCS01G, ICE1CS02FKLA1 lacks integrated HV startup but offers greater design flexibility with fully externalized compensation; versus UCC28070, it provides tighter system-level coordination between PFC and PWM stages at lower total BOM cost for sub-300 W applications.

Availability

ICE1CS02FKLA1 is available at Aetrix Electronics and suitable for LED street lighting power supplies, industrial AC-DC adapters, and office equipment SMPS requiring stable component supply, long-term lifecycle support, and RoHS-compliant manufacturing.

Supply support for ICE1CS02FKLA1 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 ICE1CS02 product line targets cost-effective, high-reliability two-stage AC-DC conversion for industrial and commercial power supplies up to 300 W, emphasizing ease of design, Class D compliance, and robust protection features.

FAQ

What is the function of the VINS and VINS_HYS pins?

VINS senses the rectified AC line voltage to trigger brown-out shutdown when input drops below a user-set threshold. VINS_HYS is an open-collector comparator output; connecting a resistor between VINS and VINS_HYS sets hysteresis-ensuring clean, bounce-free restart after grid recovery without oscillatory cycling.

How does the PWM SYNC/Duty pin support both synchronization and duty cycle selection?

This dual-function pin accepts either an external clock signal (70–150 kHz) for synchronization or a resistor to ground to select max duty cycle (47% or 60%). When VSENSE > 2.6 V (indicating VOUT > 330 V), the IC overrides the resistor setting and enforces 47% max duty for safety-preventing overvoltage stress on the main switch.

Can ICE1CS02FKLA1 operate without an auxiliary winding on the transformer?

No-it requires an external 11–26 V auxiliary supply connected to VCC. Unlike later Infineon controllers (e.g., ICE2PCS01G), ICE1CS02FKLA1 lacks an integrated high-voltage startup circuit and cannot derive VCC directly from the rectified mains.

What protection features are implemented in hardware versus those requiring external components?

Hardware-implemented protections include UVLO (11 V/12 V), OVP (3 V on PFC OVP), over-current limiting (< ±5% tolerance), leading-edge blanking (220 ns), and pre-short blanking (capacitor-programmable). External components are required for brown-out hysteresis (R between VINS/VINS_HYS), soft-start timing (C on PFC VCOMP), and compensation networks (RC on PFC VCOMP/ICOMP and PWM FB).