Infineon Technologies ICE3B2565FKLA1

Overview

ICE3B2565FKLA1 from Infineon Technologies is a 650V off-line SMPS current-mode controller IC integrating a depletion-mode CoolMOS™ power transistor and 650V startup cell in a PG-DIP-8 package. It delivers 68W input power at 230VAC ±15%, operates at fixed 67kHz switching frequency, features <±5% peak current limiting tolerance, and enables <100mW standby power via Active Burst Mode - deployed in AC/DC adapters for consumer electronics.

For engineers reviewing the ICE3B2565FKLA1 datasheet, ICE3B2565FKLA1 pinout, ICE3B2565FKLA1 application, or ICE3B2565FKLA1 equivalent, key selection criteria include integrated 650V CoolMOS™ R_DS(on) = 0.65Ω (T_j = 25°C), Auto Restart protection modes (overtemperature, overvoltage, open-loop, undervoltage), adjustable blanking window, and isolated drain configuration in DIP-8.

Technical Context

The ICE3B2565FKLA1 implements a current-mode PWM control architecture with internal oscillator set to 67kHz, precise leading-edge blanking, and propagation delay compensation for stable peak-current sensing. Its integrated CoolMOS™ transistor eliminates external high-voltage MOSFET and startup resistor, reducing component count and board space.

Active Burst Mode dynamically modulates switching pulses under light load while maintaining full controller activity - enabling immediate response to load jumps and <1% output voltage ripple. Protection logic triggers Auto Restart Mode on VCC undervoltage, overtemperature, overvoltage, overload, or open-loop conditions - ensuring robust system-level fault recovery without latch-off.

Key Specifications

Pinout & Package

ICE3B2565FKLA1 uses the PG-DIP-8 package (8-pin dual in-line plastic) with internal short between pins 4 and 5 (dual drain connection), and pin 6 unconnected. The package provides reinforced creepage distance for enhanced isolation in AC/DC applications.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ICE3B2065FKLA1, this part delivers +11W input power headroom and tighter current limit tolerance; versus ICE3B3065I, it trades package thermal capability for board-level integration and creepage compliance in compact enclosures.

Availability

ICE3B2565FKLA1 is available at Aetrix Electronics and suitable for USB-C PD adapters, LED driver power supplies, smart home power supplies, and industrial control auxiliary PSUs requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.

Supply support for ICE3B2565FKLA1 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.

This device belongs to the CoolSET™-F3 family - engineered specifically for cost-sensitive, high-efficiency off-line SMPS designs targeting consumer and industrial auxiliary power applications up to 70W.

FAQ

What is the maximum continuous input power rating for ICE3B2565FKLA1?

The ICE3B2565FKLA1 supports up to 68W continuous input power at 230VAC ±15% under open-frame conditions (T_a = 75°C, T_j = 125°C, no heatsink). This rating assumes proper PCB copper area for thermal dissipation and accounts for the 0.65Ω R_DS(on) and 67kHz switching losses. Derating applies below 200VAC or above ambient temperature.

Does ICE3B2565FKLA1 require an external startup resistor?

No - ICE3B2565FKLA1 integrates a 650V startup cell that draws initial current directly from the rectified AC line, eliminating the need for an external high-voltage startup resistor and its associated power loss and reliability risk. V_CC is sustained post-startup by the auxiliary winding.

How does Active Burst Mode differ from traditional burst mode in ICE3B2565FKLA1?

Unlike conventional burst mode that disables the controller core, ICE3B2565FKLA1's Active Burst Mode keeps the oscillator and control logic fully active while gating PWM pulses - enabling immediate response to load steps without output voltage dropout. This maintains <1% output ripple and eliminates blackouts during dynamic loading.

Can pin 6 (n.c.) be grounded or left floating in the PCB layout?

Pin 6 is explicitly designated "Not Connected" in the datasheet and must remain unconnected - neither grounded nor tied to any net. Connecting it risks internal latch-up or undefined behavior due to internal routing. The DIP-8 footprint should assign this pad as a non-plated void or keepout zone.