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IRS20957SPBF-IRS20957STRPBF
Protected Digital Audio Driver with Floating PWM input in a 16-Lead SOIC Narrow Package
International
ait, Rectifier
Features
Floating PWM input enables easy half bridge
implementation
Programmable bidirectional over-current protection with
self-reset function
Programmable preset dead-time for improved THD
performances
High noise immunity
i100V ratings deliver up to 500W in output power
3.3 V/ 5 V logic compatible input
Operates up to 800kHz
Typical Applications
Home theatre systems
Mini component stereo systems
Powered speaker systems
General purpose audio power amplifiers
Typical Connection Diagram
March 5, 2009
Datasheet No - PD97381
IRS20957S
Protected Digital Audio Driver
Product Summary
Topology Half-Bridge
VOFFSET (max) +/- 100 V
Io+ & Io. (typical) 1.0 A & 1.2 A
Selectable deadtime 15/25/35/80ns
Ton & toff (typical) 95ns & 80ns
oc protection delay
500ns (max)
Shutdown
propagation delay
250ns (max)
Package
16-Lead SOIC
IRS20957S
CSD VB 15 }—4
IN HO 14
-—E van cm Is-]
PWM 1&[2 VSS vs T T
[E NC NC
--NVV--15 VREF VCC ET-
-—l: OCSET LO 10
s DT COM sCal-, f
J, gl Speaker
Note: Please refer to Lead Assignments for correct pin configuration. This diagram shows
electrical connections only.
© 2008 International RectITler
International IRS20957S
TOR Rectifier
Table of Contents Page
Description 3
Qualification Information 4
Absolute Maximum Ratings 5
Recommended Operating Conditions 6
Electrical Characteristics 7
Functional Block Diagram 9
Input/Output Pin Equivalent Circuit Diagram 10
Lead Definitions 11
Lead Assignments 11
Waveform definitions 12
Application information and additional information 12
Package Details 13
Tape and Reel Details 14
Part Marking Information 15
Ordering Information 16
© 2008 International Rectifier
