Infineon Technologies ICE5AR4780BZS | Demoboard DEMO_5AR4780BZS_14W1

Description

This document is an engineering report for a 14 W 15 V and 5 V demo board designed in a fixed-frequency non-isolated flyback converter topology with primary-side feedback (FB) using the fifth-generation fixed-frequency CoolSET™ ICE5AR4780BZS. The demo board is operated in Discontinuous Conduction Mode (DCM) and is running at 100 kHz fixed switching frequency. The frequency reduction with soft gate driving and frequency jittering offers lower EMI and better efficiency between light load and 50 percent load. The selectable Active Burst Mode (ABM) power enables ultra-low power consumption. In addition, numerous adjustable protection functions have been implemented in ICE5AR4780BZS to protect the system and customize the IC for the chosen application. In case of failure modes, like VCC Over Voltage (OV)/Under Voltage (UV), open control-loop or over load, over-temperature, VCC short-to-GND and Current Sense (CS) short-to-GND, the device enters protection mode. By means of the cycle-by-cycle Peak Current Limitation (PCL), the dimensions of the transformer and the 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 ICE5AR4780BZS 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 non-isolated output
• 100kHz switching frequency with discontinuous current mode design
• Wide-range input from 85~300VAC
• Output #1: 15V/0.83A
• Output #2: 5V/0.4A

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