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C2472PX2-TR7

Description
2 ELEMENT, 340 uH, GENERAL PURPOSE INDUCTOR
CategoryPassive components   
File Size461KB,18 Pages
ManufacturerETC2
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C2472PX2-TR7 Overview

2 ELEMENT, 340 uH, GENERAL PURPOSE INDUCTOR

C2472, C2473 and C2474 Datasheet
RDFC Controllers for Offline Applications
ADVANTAGES
Low system component count
High average efficiency
Low standby power consumption
EMI compliance without extra components
High isolation & surge voltage withstand
High power density in very small size
C2474PW1
PDIP-8
C2472PX2
SOT23-6
FEATURES
Highly integrated CMOS controller IC
Low cost package options
Drive suitable for low cost bipolar power transistors
Resonant switching for high efficiency and low EMI
Frequency optimised for power circuit parasitics
Protection against overload, over-temperature and under-voltage
C2473PX1
SOP-8
APPLICATIONS
External AC/DC charger/adaptor (single voltage input) e.g. cordless phones, portable electric tools.
Embedded PSU (single voltage input) e.g. set-top boxes, DVD players, audio products, domestic appliances.
OVERVIEW
The C2472, C2473 and C2474 controllers use CamSemi’s Resonant Discontinuous Forward Converter
(RDFC) topology to create a high efficiency, low cost alternative to line-frequency transformer PSUs. By
operating in resonant mode, EMI is greatly reduced, enabling the replacement of linear PSUs in demanding
applications such as audio products and cordless phone chargers. The C2472, C2473 and C2474 controllers
also offer overload protection which is usually associated with more expensive switch mode solutions.
VDD
Vdd
Vdd
regulator
AUX
Switch
saturation
sensing
COL
Resonance
sensing
Base
drive
CS
Current
sensing
RDFC
Control
BAS
GND
Figure 1: Block Diagram of the C2472, C2473 and C2474 Controller ICs
Product data
© Cambridge Semiconductor Ltd 2007
Page 1 of 18
DS-1423-0709C
26-Sep-2007

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Description 2 ELEMENT, 340 uH, GENERAL PURPOSE INDUCTOR 2 ELEMENT, 340 uH, GENERAL PURPOSE INDUCTOR 2 ELEMENT, 340 uH, GENERAL PURPOSE INDUCTOR 2 ELEMENT, 340 uH, GENERAL PURPOSE INDUCTOR 2 ELEMENT, 340 uH, GENERAL PURPOSE INDUCTOR 2 ELEMENT, 340 uH, GENERAL PURPOSE INDUCTOR 2 ELEMENT, 340 uH, GENERAL PURPOSE INDUCTOR 2 ELEMENT, 340 uH, GENERAL PURPOSE INDUCTOR
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