IRS20955PBF Datasheet, PDF (1/21 Pages) International Rectifier – PROTECTED DIGITAL AUDIO DRIVER

PRELIMINARY
Data Sheet No. PD60303
IRS20955(S)PbF
PROTECTED DIGITAL AUDIO DRIVER
Features
· Floating PWM input enables easy half-bridge
implementation
· Programmable bidirectional over-current protection
with self-reset function
· Programmable preset deadtime for improved THD
performances
· High noise immunity
· ±100 V ratings deliver up to 500 W in output power
· 3.3 V/5 V logic compatible input
· Operates up to 800 kHz
· RoHS compliant
Product Summary
V_OFFSET (max)
Gate driver
I_o+
I_o-
Selectable deadtime
Propagation delay
OC protection delay
Shutdown propagation
delay
± 100 V
1.0 A
1.2 A
15 ns, 25 ns,
35 ns, 45ns
90 ns
500 ns (max)
250 ns (max)
Description
The IRS20955 is a high voltage, high speed MOSFET driver
with a floating PWM input designed for Class D audio
amplifier applications.
Bi-directional current sensing detects over-current
conditions during positive and negative load currents without
any external shunt resistors. A built-in protection control
block provides a secure protection sequence against over-
current conditions and a programmable reset timer.
Package
The internal deadtime generation block enables accurate
gate switching and optimum deadtime setting for better
audio performance, such as lower THD and lower audio
noise floor.
16-Lead PDIP
16-Lead SOIC
Typical Connection
PWM
(Please refer to Lead
Assignments for correct
pin configuration. This
diagram shows
electrical connections
only)
www.irf.com
IRS20955 (S)
VDD
CSD
IN
VSS
NC
VREF
OCSET
DT
CSH
VB
HO
VS
NC
VCC
LO
COM
+B
Speaker
Vcc
12V
-B
1