Infineon Technologies ICE2A165FKLA1

Overview

ICE2A165FKLA1 from Infineon Technologies is an off-line AC/DC current-mode PWM controller with integrated 650V CoolMOS™ power transistor, designed for low-power flyback SMPS in DIP-8 package. It delivers 31W at 230VAC ±15%, operates at 100kHz switching frequency, features <±5% peak current limiting tolerance, and supports low-standby-power operation compliant with European Commission requirements for energy efficiency.

For engineers reviewing the ICE2A165FKLA1 datasheet, ICE2A165FKLA1 pinout, ICE2A165FKLA1 application, or ICE2A165FKLA1 equivalent, key selection criteria include integrated high-voltage MOSFET capability, precise current sensing for transformer sizing, auto-restart protection under overload/open-loop conditions, and thermal shutdown with recovery behavior - all critical for cost-sensitive, isolated AC/DC adapter and auxiliary supply designs.

Technical Context

The ICE2A165FKLA1 implements a fixed-frequency (100kHz) current-mode control architecture with internal leading-edge blanking and propagation delay compensation to ensure stable cycle-by-cycle current sensing. Its integrated 650V CoolMOS™ enables direct connection to universal AC input (85–265VAC) without external HV starter circuitry.

Standby operation uses frequency reduction down to 20kHz/21.5kHz to minimize losses while maintaining output regulation; the protection unit triggers auto-restart mode on overvoltage, overload, or open-loop faults, with dedicated FB and Isense inputs enabling secondary-side regulation and primary-side current limiting respectively.

Key Specifications

Pinout & Package

ICE2A165FKLA1 is housed in PG-DIP-8 package with creepage-enhanced layout and isolated drain pins. The package requires no heatsink for typical low-power adapter applications 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 ICE2A165Z and ICE2B165, the ICE2A165FKLA1 offers optimal balance of power density (18W in DIP-8), EMI profile (100kHz), and thermal robustness - making it ideal for space-constrained, cost-driven adapters requiring full 230VAC capability without derating.

Availability

ICE2A165FKLA1 is available at Aetrix Electronics and suitable for USB wall adapters, smart home sensor power supplies, and industrial control auxiliary rails requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.

Supply support for ICE2A165FKLA1 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 developed specifically for highly integrated, low-standby-power AC/DC converters targeting consumer, industrial, and IoT auxiliary power applications - emphasizing integration, protection reliability, and regulatory compliance.

FAQ

What is the maximum continuous output power of ICE2A165FKLA1 at 230VAC?

The ICE2A165FKLA1 delivers 31W maximum power at 230VAC ±15% under ideal thermal conditions (T_j = 125°C, T_a = 75°C, 6 cm² copper area). In practical open-frame designs, continuous output is rated at 18W to maintain safe junction temperature and long-term reliability without forced airflow or heatsinking.

How does the auto-restart protection function during an overload condition?

When overload, open-loop, or overvoltage is detected, the ICE2A165FKLA1 enters auto-restart mode: it disables switching, discharges the SoftS capacitor, then attempts restart after a fixed delay (~1 second). This cycle repeats until fault clearance, preventing thermal damage while maintaining system awareness without external supervision.

Can ICE2A165FKLA1 operate with primary-side regulation only (no optocoupler)?

No - the ICE2A165FKLA1 requires feedback via the FB pin for closed-loop voltage regulation. While it supports primary-side sensing schemes using auxiliary winding feedback, the FB pin must receive a valid error signal; operation without any feedback path results in unregulated output and activation of overvoltage protection.

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

Pins 4 and 5 are internally connected to the same CoolMOS™ drain node and serve to reduce current density and improve thermal conduction from the die to the PCB. Both pins must be routed to the same high-voltage net and share thermal copper pour; splitting them degrades SOA performance and may cause localized overheating.