Infineon Technologies ICE3AR4780CJZXKLA1

Overview

ICE3AR4780CJZXKLA1 from Infineon Technologies is an integrated off-line SMPS current-mode controller combining an 800V avalanche-rugged CoolMOS® power transistor, startup cell with brownout detection, and CCM/DCM operation support in a single PG-DIP-7 package. It delivers 31W max input power at 230VAC ±15%, operates at a fixed 100kHz switching frequency with jittering, and features active burst mode for <100mW standby power - targeting auxiliary supplies for PCs, servers, and Blu-ray players.

For engineers reviewing the ICE3AR4780CJZXKLA1 datasheet, ICE3AR4780CJZXKLA1 pinout, ICE3AR4780CJZXKLA1 application, or ICE3AR4780CJZXKLA1 equivalent, key selection criteria include its integrated 800V CoolMOS®, slope-compensated current-mode control for stable CCM operation, selectable burst entry/exit thresholds, 10ms soft-start, and brownout-enabled line-voltage monitoring across 85–265VAC inputs.

Technical Context

This device implements a BiCMOS-based current-mode PWM controller with internal oscillator, propagation-delay-compensated peak-current limiting, and dual-mode protection (auto-restart + latch). Its slope compensation ensures stability in continuous conduction mode across wide load and line ranges, while the integrated startup cell eliminates external high-voltage resistors.

The BRL pin unifies brownout detection (trip at <1V), fast AC reset (triggered by 0.4V→1V rise rate <1.33V/ms), and external latch enable (<0.4V), enabling robust line-fault response without auxiliary circuitry. The FBB pin simultaneously handles feedback regulation and burst-level selection via external resistor dividers.

Key Specifications

Pinout & Package

ICE3AR4780CJZXKLA1 is housed in a PG-DIP-7 (Plastic Dual In-line Package, 7-pin, staggered lead pitch) with creepage/clearance optimized for 85–265VAC isolation requirements. Pin 6 is omitted (no physical pin), and Pin 4 is internally not connected.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ICE3AR4780JZXKLA1 and ICE5QSBG, ICE3AR4780CJZXKLA1 uniquely combines 800V ruggedness, slope-compensated CCM, and unified BRL functionality - making it the only option for globally rated, low-noise, high-reliability auxiliary supplies needing single-chip simplicity and brownout resilience.

Availability

ICE3AR4780CJZXKLA1 is available at Aetrix Electronics and suitable for PC auxiliary power supplies, server standby PSUs, and Blu-ray player main power stages requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for ICE3AR4780CJZXKLA1 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 part belongs to the CoolSET®-F3R80 product line - engineered specifically for compact, high-voltage-margin offline SMPS designs requiring integrated power switches, low standby power, and robust protection in consumer and computing auxiliary supplies.

FAQ

What is the purpose of the BRL pin's triple function?

The BRL pin integrates brownout detection (shuts down below 1V), fast AC reset (recovers from latch mode upon AC line restoration), and external latch enable (forces shutdown when pulled below 0.4V). This consolidation eliminates discrete components for line-monitoring and fault recovery, reducing BOM count and improving system-level reliability in universal-input SMPS designs.

How does slope compensation improve CCM operation?

Slope compensation adds a controlled ramp to the current-sense signal, preventing subharmonic oscillation when duty cycle exceeds 50% in continuous conduction mode. For ICE3AR4780CJZXKLA1, this enables stable regulation across full load range without external compensation networks - critical for low-noise audio/video power supplies.

Why is the 800V CoolMOS® significant for 230VAC applications?

An 800V drain-source rating provides 2.5× margin above the 325V peak of 230VAC mains, accommodating surge transients (e.g., IEC 61000-4-5 Level 3: 2kV ring wave) without derating. This eliminates need for external snubbers or higher-cost 1000V+ MOSFETs while maintaining thermal headroom for 31W input power.

Can ICE3AR4780CJZXKLA1 operate without an external startup resistor?

Yes - the integrated startup cell draws initial current directly from the bulk capacitor via the Drain pin, eliminating the high-voltage startup resistor required by conventional controllers. This reduces component count, improves efficiency at light loads, and enhances reliability by removing a common failure point in auxiliary supplies.