IRS20954S Datasheet, PDF (1/25 Pages) International Rectifier – Protected Digital Audio Driver

Data Sheet No. PD60276
IRS20954S
Protected Digital Audio Driver
Features
• Floating PWM input enables easy half bridge
implementation
• Integrated programmable bi-directional over-current
protection with self-reset function
• Programmable compensated preset deadtime for
improved THD performances
• High noise immunity
• ±100 V high voltage ratings deliver up to 500 W output
power
• 3.3 V / 5 V logic compatible input
• Operates up to 800 kHz
• RoHS compliant
Product Summary
VOFFSET (max)
Io+
Gate driver
Io -
Selectable Deadtime
Propagation delay
OC protection delay
± 100 V
1.0 A
1.2 A
15 ns, 25 ns,
35 ns, 45 ns
90 ns
1 µs (max)
Description
The IRS20954 is a high voltage, high speed MOSFET driver
with floating PWM input, specially designed for Class D audio
amplifier applications. The bi-directional current sensing
requires no external shunt resistors. It can capture over-current
conditions at either positive or negative load current direction. A
built-in control block provides secure protection sequence
against over-current conditions, including a programmable reset
timer. The internal deadtime generation block provides
accurate gate switch timing and enables optimum deadtime
settings for better audio performances, such as THD and audio
noise floor.
Package
16-Lead SOIC (narrow body)
Typical Connection
PWM
(Please refer to Lead
Assignments for correct
pin configuration. This
diagram shows
electrical connections
only)
IRS 20954 S
VDD
CSH
CSD
VB
IN
HO
VSS
VS
NC
VREF
NC
VCC
OCSET
LO
DT
COM
+B
Speaker
Vcc
12 V
-B
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