Infineon Technologies ICE3RBR1765JGXUMA1

Overview

ICE3RBR1765JGXUMA1 from Infineon is a fixed-frequency, 650 V integrated CoolSET™ PWM controller with built-in 650 V CoolMOS™ transistor in PG-DSO-12 package. It delivers active burst mode (standby power <50 mW), 65 kHz switching frequency, ±5% peak current limit tolerance, and external auto-restart enable via BA pin - designed for universal-input AC/DC flyback converters in consumer auxiliary power supplies.

For engineers reviewing the ICE3RBR1765JGXUMA1 datasheet, ICE3RBR1765JGXUMA1 pinout, ICE3RBR1765JGXUMA1 application, or ICE3RBR1765JGXUMA1 equivalent, key selection criteria include its integrated high-voltage startup cell eliminating external startup resistors, extendable blanking window for load-jump robustness, BiCMOS-based wide VCC range (up to 25 V), and propagation delay compensation for input-voltage-independent power limiting.

Technical Context

This IC implements current-mode PWM control with patented Active Burst Mode that maintains full optocoupler feedback regulation even at no-load, enabling sub-50 mW standby while preserving output voltage stability during fast load transients. Its internal architecture integrates a 650 V avalanche-rugged CoolMOS™ with dedicated drain pins (pins 5–8), a precision current-sense comparator with leading-edge blanking and propagation delay compensation, and a bi-directional BA pin supporting both extended blanking time (via external capacitor) and hardware-triggered auto-restart entry.

The control unit combines fixed 65 kHz oscillator jittering, soft gate driving, and a 20 ms built-in soft-start with programmable blanking extension - all implemented in BiCMOS process to achieve low quiescent current and stable operation across 18–25 V VCC range. Protection logic includes auto-restart on overtemperature, VCC over/under-voltage, open-loop, and overload conditions, with fault recovery fully automatic upon condition clearance.

Key Specifications

Pinout & Package

Package: PG-DSO-12 (12-pin exposed-pad SOIC variant with thermal pad; RoHS-compliant, green mold compound).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar AC/DC flyback controller applications.

Compared with ICE3RBR1765JG and ICE3RBR1765J, the XUMA1 offers identical performance with optimized packaging for high-volume manufacturing - retaining full BA functionality and thermal performance of the DSO-12 footprint, unlike the DSO-8 variant which sacrifices critical protection flexibility.

Availability

ICE3RBR1765JGXUMA1 is available at Aetrix Electronics and suitable for adapter/charger, set-top box, and white goods auxiliary power supply designs requiring stable component supply, long-term lifecycle support, and RoHS-compliant green packaging.

Supply support for ICE3RBR1765JGXUMA1 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 is a German semiconductor leader specializing in power management, automotive, and industrial control ICs, with core expertise in silicon and SiC power devices.

This part belongs to the CoolSET™ F3R family - engineered specifically for high-efficiency, low-standby AC/DC flyback converters targeting consumer electronics and home appliance auxiliary supplies.

FAQ

What is the purpose of the BA pin, and how is it configured for extended blanking?

The BA pin provides dual functionality: extending the internal 20 ms blanking window and enabling external auto-restart. For extended blanking, connect a capacitor from BA to GND - capacitance value directly scales blanking duration. For auto-restart, pull BA below 0.33 V with an open-drain signal; the IC stops switching and enters auto-restart after the current blanking period completes.

Does ICE3RBR1765JGXUMA1 require an external startup resistor?

No. It integrates a high-voltage startup cell connected directly to the Drain pins, eliminating the need for an external high-voltage startup resistor. The cell draws 0.9 mA to charge the VCC capacitor until VCC reaches 18 V, then disables automatically - reducing no-load losses and improving light-load efficiency.

How does propagation delay compensation improve power supply reliability?

Propagation delay compensation dynamically adjusts the current-sense comparator timing to offset MOSFET gate-drive propagation delays, which vary with input voltage and temperature. This ensures the peak current limit remains accurate and consistent across 85–270 VAC input range - preventing transformer oversizing and maintaining safe power delivery under all line conditions.

Can ICE3RBR1765JGXUMA1 operate without an optocoupler in the feedback path?

No. The FB pin is the sole input for closed-loop regulation, including in Active Burst Mode. An optocoupler is mandatory to provide isolated feedback from the secondary side. The IC integrates the RC filter normally placed after the optocoupler, but the isolation barrier itself must be maintained externally for safety and regulation integrity.