Infineon Technologies ICE3BR1765JZXKLA1

Overview

ICE3BR1765JZXKLA1 from Infineon Technologies is an integrated off-line SMPS current-mode controller with a 650 V avalanche-rugged CoolMOS® power transistor, fixed 65 kHz switching frequency, active burst mode for <50 mW standby power, and built-in startup cell in PG-DIP-7 package. It targets low-power AC/DC adapters for DVD players, Blu-ray drives, and set-top boxes.

For engineers reviewing the ICE3BR1765JZXKLA1 datasheet, ICE3BR1765JZXKLA1 pinout, ICE3BR1765JZXKLA1 application, or ICE3BR1765JZXKLA1 equivalent, key selection criteria include its integrated 650 V CoolMOS®, ±5% peak current limit tolerance, 20 ms extendable blanking window, soft gate driving for EMI reduction, and external auto-restart enable functionality.

Technical Context

The ICE3BR1765JZXKLA1 implements a BiCMOS-based current-mode PWM architecture with internal oscillator, propagation delay compensation, and leading-edge blanking to ensure stable peak-current control across input voltage variations. Its integrated CoolMOS® drain connects directly to the high-voltage AC line via the startup cell, eliminating the external startup resistor.

It operates in two protection modes: auto-restart with or without extended blanking time, triggered by overload, overtemperature, VCC undervoltage, or overvoltage faults. The BA pin serves dual roles - extending blanking time via external capacitor and enabling immediate gate shutdown when pulled below 0.33 V.

Key Specifications

Pinout & Package

Package: PG-DIP-7 (Plastic Dual-In-Line Package, 7-pin, through-hole mount). Pin 4 and Pin 6 are internally not connected (n.c.) and must remain unconnected on PCB.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar integrated SMPS controller applications.

Compared with ICE3BR1765JZ and ICE3BR1765J, the ICE3BR1765JZXKLA1 delivers measurable EMI reduction via jitter, enables safer high-load transient handling via extendable blanking, and provides full manufacturing traceability-making it the preferred choice for new designs targeting regulatory compliance and field reliability.

Availability

ICE3BR1765JZXKLA1 is available at Aetrix Electronics and suitable for DVD adapter design, Blu-ray player SMPS development, and set-top box standby supply projects requiring stable component supply, full Infineon traceability, and RoHS-compliant through-hole integration.

Supply support for ICE3BR1765JZXKLA1 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 leader specializing in power management, automotive ICs, and industrial control solutions, headquartered in Munich with global R&D and manufacturing infrastructure.

The CoolSET®-F3R product line was designed specifically for cost-sensitive, low-power offline SMPS applications demanding high integration, ultra-low standby consumption, and simplified EMI compliance - targeting consumer electronics power supplies under 50 W.

FAQ

What is the purpose of the BA pin on ICE3BR1765JZXKLA1?

The BA pin provides dual functionality: (1) extending the internal 20 ms blanking window by adding an external capacitor to ground, delaying overload detection during high-current transients; and (2) enabling immediate auto-restart by pulling the pin below 0.33 V, forcing gate shutdown and fault recovery sequencing. Both functions operate independently and are validated in the datasheet's Figure 1 and Section 1.2.

Does ICE3BR1765JZXKLA1 require an external startup resistor?

No. The device integrates a high-voltage startup cell connected directly to the Drain pin, allowing it to draw initial current from the rectified AC line without an external resistor. This feature reduces no-load power loss and eliminates one discrete component, as confirmed in Section 3.4 and Figure 3 of the official datasheet.

How does Active Burst Mode maintain output regulation at light load?

During Active Burst Mode, the FB pin remains the sole control input to the internal PWM comparator. The optocoupler continues delivering feedback signals, enabling full-cycle regulation even at very low duty cycles. This preserves output voltage accuracy (<±5%) while minimizing switching losses - a key differentiator from basic burst modes that disable feedback during idle periods.

Can ICE3BR1765JZXKLA1 be used in continuous conduction mode (CCM) flyback designs?

Yes. With its 75% maximum duty cycle, ±5% current limit tolerance, and propagation delay compensation, the IC supports CCM operation across universal input ranges. Designers must size the transformer and output rectifier for peak current and RMS conduction losses, but the internal current sensing and gate drive characteristics are fully compatible with CCM, as verified in Section 4.3.6 and typical application schematics.