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FA5553

Fuji
Part Number FA5553
Manufacturer Fuji
Description PWM Control Power Supply IC
Published Oct 6, 2015
Detailed Description FA5553/5547 Series of PWM Control Power Supply ICs with Multi-functionality and Low Standby Power Masanari Fujii Hirosh...
Datasheet PDF File FA5553 PDF File

FA5553
FA5553

Overview
FA5553/5547 Series of PWM Control Power Supply ICs with Multi-functionality and Low Standby Power Masanari Fujii Hiroshi Maruyama Kokou Boku 1.
Introduction In recent years, global environmental warming has come to be addressed as a worldwide problem and energy savings has become critical for all electric products.
In particular, televisions, audio components, notebook computers, printers and other such peripheral devices that are often continuously plugged into an electrical outlet remain in their standby state for a longer duration of time than their actual time of usage, and therefore functions for reducing the power consumption during standby have become essential.
Requests for lower standby power consumption in power supply units have also intensified year after year.
In response to these requests, Fuji Electric has already developed a series of control ICs for use in switching mode power supply units to convert commercial AC power (100 V or 240 V) to a DC power supply.
Recently, Fuji Electric has developed the FA5553 / 5547 series of 8-pin current mode PWM (pulse width modulation) control power supply ICs which feature enhanced low standby power performance and added protection functions suitable for various products.
An overview of this new product series is presented below.
2.
Product Overview Fuji Electric has developed a series of AC-DC power supply ICs for driving externally attached power MOSFETs fabricated using a 30 V CMOS (complementary metal-oxide-semiconductor) process, and this newly developed IC series is listed in Table 1.
This IC series is used as a PWM IC on the primary side in the conceptual diagram of a switching mode power supply shown in Fig.
1.
2.
1 Characteristics As indicated in Table 1 each unit type is provided Fig.
1 Conceptual diagram of switching mode power supply AC power supply Primary side Secondary side + C1 Half-wave RVH PWM IC LAT VH FB (NC) IS VCC GND OUT + MOS C2 gate signal RS Main winding Auxiliary winding Second...


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