Infineon Technologies ICE3B2065JFKLA1

Overview

ICE3B2065JFKLA1 from Infineon Technologies is an integrated off-line SMPS current-mode controller with built-in 650V CoolMOS® power transistor and startup cell in PG-DIP-8 package, operating at fixed 67 kHz switching frequency with ±5% peak current limit tolerance, 0.92 W typical standby power at 230 VAC, and active burst mode enabling <100 mW no-load consumption - used in low-cost AC/DC adapters and auxiliary power supplies for consumer electronics.

For engineers reviewing the ICE3B2065JFKLA1 datasheet, ICE3B2065JFKLA1 pinout, ICE3B2065JFKLA1 application, or ICE3B2065JFKLA1 equivalent, key selection considerations include its integrated high-voltage switch, jitter-enabled EMI reduction, soft-start/blanking/frequency-jitter control via SoftS pin, and auto-restart protection modes for overload, overvoltage, overtemperature, and VCC undervoltage conditions.

Technical Context

The ICE3B2065JFKLA1 implements a BiCMOS-based current-mode PWM architecture with internal oscillator, precise peak-current sensing (CS input), and feedback-controlled duty cycle modulation via FB pin. Its integrated 650 V CoolMOS® drain connects directly to the AC rectified input, eliminating external HV startup resistors.

It features a unified SoftS pin that simultaneously controls soft-start timing, adjustable blanking window for load-jump immunity, and frequency jitter period - all set by a single external capacitor. The controller enters Active Burst Mode below light-load thresholds, maintaining regulation via optocoupler feedback while reducing average switching activity and output ripple to <1%.

Key Specifications

Pinout & Package

Package: PG-DIP-8 (Plastic Dual In-line Package, 8-pin, through-hole mount). Pins 4 and 5 are internally shorted as common Drain connection; Pin 6 is NC (Not Connected).

Key Features

Applications

Equivalent & Alternatives

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

Compared with ICE3B1565J and ICE3B0565J, the ICE3B2065JFKLA1 delivers highest power capability (57 W), lowest R_DS(on), and lowest standby loss - making it optimal for universal-input adapters targeting 36–57 W output with stringent no-load and thermal requirements.

Availability

ICE3B2065JFKLA1 is available at Aetrix Electronics and suitable for USB wall adapters, smartphone charging supplies, and set-top box auxiliary supplies requiring stable component supply, long-term lifecycle support, and RoHS-compliant manufacturing.

Supply support for ICE3B2065JFKLA1 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®-F3 product line integrates HV power switches and controllers for cost-sensitive offline SMPS applications - designed specifically to reduce external component count and simplify compliance with global energy-efficiency standards.

FAQ

What is the purpose of the SoftS pin in ICE3B2065JFKLA1?

The SoftS pin serves three integrated functions: soft-start timing (via external capacitor), adjustable blanking window for high-load-jump immunity, and frequency jitter period control. It also acts as the error-sensing node for auto-restart mode - detecting overtemperature, overvoltage, and open-loop faults. All functions share the same capacitor-to-ground connection, minimizing external parts.

How does the integrated startup cell eliminate the need for an external HV resistor?

The internal startup cell draws 1.05 mA from the Drain pin to charge the VCC capacitor during initial power-up. Once VCC reaches 18 V, the UVLO circuit disables the startup cell, removing its conduction path. This eliminates continuous power loss and thermal stress associated with traditional external HV resistors - improving light-load efficiency and reliability.

Can ICE3B2065JFKLA1 operate in discontinuous conduction mode (DCM)?

Yes - the ICE3B2065JFKLA1 supports DCM operation via its current-mode control architecture and fixed 67 kHz frequency. Its precise ±5% peak current limit and leading-edge blanking ensure stable DCM behavior across line and load variations, especially in flyback converters with low leakage inductance and tight regulation requirements.

What protection features are implemented, and how do they recover?

The IC implements auto-restart protection for overtemperature, VCC overvoltage, output open-loop, overload, and VCC undervoltage. Upon fault detection, it halts switching and discharges the SoftS capacitor. Recovery occurs automatically once the fault condition clears - no manual reset or AC disconnect is required, ensuring robust field operation in consumer power supplies.