Infineon Technologies ICE5AR4780BZSXKLA1

Overview

ICE5AR4780BZSXKLA1 from Infineon is a fixed-frequency 800 V integrated power IC (CoolSET™) combining a PWM controller and avalanche-rugged CoolMOS™ in a single DIP-7 package. It delivers 15 W output at 85–300 VAC in DCM, features 100 kHz switching, 4.13 Ω R_DS(on), digital frequency reduction, and selectable Active Burst Mode for <100 mW standby power - deployed in auxiliary supplies for TVs, monitors, and white goods.

For engineers reviewing the ICE5AR4780BZSXKLA1 datasheet, ICE5AR4780BZSXKLA1 pinout, ICE5AR4780BZSXKLA1 application, or ICE5AR4780BZSXKLA1 equivalent, this product enables non-isolated/isolated flyback designs with integrated error amplifier, cycle-by-cycle current limiting, soft gate drive, and comprehensive auto-restart protections including VCC OVP/UVP, CS short-to-GND, and thermal shutdown.

Technical Context

This CoolSET™ integrates a current-mode PWM controller with an 800 V CoolMOS™ in cascode configuration, enabling fast startup via internal VCC pre-charging through the DRAIN pin. Its digital control unit implements slope compensation for stable DCM/CCM operation and modulated gate drive to reduce EMI.

The Active Burst Mode uses FB pin voltage thresholds to select entry/exit standby power levels, while the built-in transconductance error amplifier supports direct feedback in non-isolated flyback without optocoupler. All protections - including overload, open-loop, overtemperature, and CS short-to-GND - operate in auto-restart mode.

Key Specifications

Pinout & Package

ICE5AR4780BZSXKLA1 is housed in PG-DIP-7 (7-pin dual in-line plastic) package with creepage/clearance compliant for reinforced insulation in AC/DC power supplies.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar fixed-frequency flyback controller with integrated HV MOSFET applications.

Compared with ICE5AR4770BZS and ICE5AR0680BZS, ICE5AR4780BZSXKLA1 offers optimal balance of 800 V ruggedness, 15 W output capability, and ultra-low standby power - making it ideal for mid-power consumer electronics where cost, size, and efficiency are jointly constrained.

Availability

ICE5AR4780BZSXKLA1 is available at Aetrix Electronics and suitable for TV auxiliary supplies, LCD/LED monitor PSUs, and home appliance control power systems requiring stable component supply, long-lifecycle support, and RoHS-compliant manufacturing.

Supply support for ICE5AR4780BZSXKLA1 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 manufacturer specializing in power management, automotive, and industrial control ICs, with leadership in silicon and wide-bandgap power devices.

This part belongs to the CoolSET™ 5th-generation fixed-frequency flyback controller family, designed specifically for compact, low-standby-power AC/DC auxiliary supplies in consumer and industrial equipment.

FAQ

What is the maximum continuous output power supported by ICE5AR4780BZSXKLA1?

At 85–300 VAC input and DCM operation, ICE5AR4780BZSXKLA1 supports up to 15 W continuous output power in open-frame designs at T_a = 50 °C and T_J = 125 °C. This rating assumes minimum drain pin copper area on a 2 oz single-sided PCB. Actual power depends on heatsinking, transformer design, and layout - validated test data shows consistent 15 W delivery with <100 mW standby in typical TV auxiliary implementations.

Can ICE5AR4780BZSXKLA1 operate in both isolated and non-isolated flyback topologies?

Yes. In non-isolated flyback, connect VERR to feedback network and leave FB unconnected or grounded; in isolated flyback, tie VERR to GND and use FB for optocoupler feedback. The IC's dual-mode architecture supports both configurations without external component changes - confirmed in Figures 1 and 2 of the official Infineon datasheet (V2.1, p.2–3).

How does the Active Burst Mode achieve <100 mW standby power?

Active Burst Mode uses FB pin voltage thresholds to detect light-load conditions and enter low-frequency burst cycles. During bursts, the controller disables switching for extended periods while maintaining regulation via stored energy, reducing average switching and gate drive losses. Selectable entry/exit thresholds allow designers to tune standby ripple and response time - measured data shows 78 mW typical at 230 VAC no-load with proper transformer selection.

Which protection functions are implemented in auto-restart mode?

VCC overvoltage (16.0 V trip), VCC undervoltage (10.0 V release), overload/open-loop, overtemperature, CS short-to-GND, and VCC short-to-GND protections all trigger auto-restart behavior. After fault detection, the IC halts switching, discharges internal timers, and attempts restart after a fixed delay - verified in Section 3.7.6 and Table 4 of the datasheet, with thermal protection activating at T_J ≥ 150 °C.