Infineon Technologies ICE5GR2280AG | Demoboard DEMO_5GR2280AG_22W1

Description

This document is an engineering report for a 22 W 12 V 5 V demo board designed in an FF isolated Flyback converter topology using the fifth-generation FF CoolSETTM ICE5GR2280AG. The demo board is operated in Discontinuous Conduction Mode (DCM) and is running at 125 kHz fixed switching frequency. The frequency reduction with soft gate driving and frequency jittering offers lower EMI and better efficiency between medium load and 50% load. The selectable Active Burst Mode (ABM) power enables ultra-low power consumption. In addition, numerous adjustable protection functions have been implemented in ICE5GR2280AG to protect the system and customize the IC for the chosen application. In case of failure modes, like line Over Voltage (OV), VCC OV/Under Voltage (UV), open control-loop or over-load, over-temperature, VCC short-to-GND and CS short-to- GND, the device enters protection mode. By means of the cycle-by-cycle Peak Current Limitation (PCL), the dimension of the transformer and current rating of the secondary diode can both be optimized. In this way, a cost-effective solution can easily be achieved. The target applications of ICE5GR2280AG are either auxiliary power supplies for white goods, PCs, servers and TVs, or enclosed adapters for Blu-ray players, set-top boxes, games consoles, etc.

Features

• Flyback topology with dual isolated output
• 125kHz switching frequency with discontinuous current mode design
• Wide-range input from 85~300VAC with line over-voltage protection at 320VAC
• Output #1: 12V/1.75A
• Output #2: 5V/0.2A

Typical applications

• Offline SMPS, adapter, main power for set-top-box, water/air purifier and TV/ auxiliary power for air conditioning, refrigerator, server, PC power and audio

More information

• Datasheet
• IC product information