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IRS20954SPBF-IRS20954STRPBF
Protected Digital Audio Driver with Floating PWM input
Not recommended for new designs.
Please use IRS20957SPBF.
International
TOR, Rectifier
Data Sheet No. P060276
IRS20954SPBF
Protected Digital Audio Driver
Features
q Floating PWM input enables easy half bridge
Product Summary
implementation
. Integrated programmable bi-directional over-current VOFFSET (max) i 100 V
protection with self-reset function Gate driver ' 1.0 A
. Programmable compensated preset deadtime for Io - 1.2 A
improved THD performances . 15 ns, 25 ns,
q High noise immunity Selectable Deadtime 35ns, 45 ns
q i100 V high voltage ratings deliver up to 500 W output Propagation delay 90 ns
power oc protection delay 1 us (max)
3.3 V / 5 V logic compatible input
Operates up to 800 kHz
q RoHS compliant
Description Package
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 V ,9
requires no external shunt resistors. It can capture over-current 'rt r.. _
conditions at either positive or negative load current direction. A '
built-in control block provides secure protection sequence =93}:
against over-current conditions, including a programmable reset 4
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
’16-Lead SOIC
noise floor.
Typical Connection
IRS 20954 S
VDD CSH
CSD VB
PWM n VSS VS
OCSET LO
(Please refer to Lead
Assignments for correct
pin configuration. This
diagram shows
electrical connections
Speaker
ml _ry
International
TOR Ilecther Not recommended for new designs. IRS20954SPBF
Please use IRS20957SPBF.
Absolute Maximum Ratings
Absolute maximum ratings indicate sustained limits beyond which damage to the device may occur. All voltage
parameters are absolute voltages referenced to COM; all currents are defined positive into any lead. The thermal
resistance and power dissipation ratings are measured under board mounted and still air conditions.
Symbol Definition Min. Max. Units
VB High-side floating supply voltage -0.3 220
Vs High-side floating supply voltage (Note 1) VB-20 VB+0.3
VH0 High-side floating output voltage Vs-0.3 VB+O.3
VCSH CSH pin input voltage Vs-O.3 VB+O.3
Vcc Low-side fixed supply voltage (Note 1) -0.3 20
VLo Low-side output voltage -0.3 Vcc +0.3
VDD Floating input supply voltage -O.3 210 V
Vss Floating input supply voltage (Note 1) (see '002) VDD+O.3
VIN PWM input voltage l/ss -0.3 VDD+O.3
Vcso CSD pin input voltage Vss -0.3 VDD+0.3
VDT DT pin input voltage -0.3 Vcc +0.3
VOCSET OCSET pin input voltage -0.3 Vcc +0.3
VREF VREF pin voltage -O.3 Vcc +0.3
IDDz Floating input supply zener clamp current (Note 1) - 10
lccz Low-side supply zener clamp current (Note 1) - 10 mA
Igsz Floating supply zener clamp current (Note 1) - 10
IOREF Reference output current - 5
d Vs /dt Allowable Vs voltage slew rate - 50 V/ns
d Vss /dt Allowable Vss voltage slew rate (Note 2) - 50
d Vss /dt Allowable Vss voltage slew rate upon power-up (Note 3) - 50 V/ms
Po Maximum power dissipation - 1.0 W
RNA Thermal resistance, junction to ambient - 115 °CNV
Tu Junction temperature - 150
Ts Storage temperature -55 150 °C
Tr, Lead temperature (soldering, 10 seconds) - 300
Note1: VDD - I/ss, Vcc -COM and VB - Vs contain internal shunt zener diodes. Please note that the voltage
ratings of these can be limited by the clamping current.
Note2: For the rising and falling edges of step signal of 10 V; Vss=15 V to 200 V.
Note3: I/ss ramps up from 0 V to 200 V.
2
