IRS20954SPBF Datasheet IRS20954SPBF, IRS20954STRPBF | P1-P3

Not recommended for new designs. IRS20954SPBF

Please use IRS20957SPBF.

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IRS20954SPBF

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

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.

Product Summary

V

OFFSET

(max)

± 100 V

Io+ 1.0 A

Gate driver

Io - 1.2 A

Selectable Deadtime

15 ns, 25 ns,

35ns, 45 ns

Propagation delay 90 ns

OC protection delay 1 µs (max)

Package

Typical Connection

(Please refer to Lead

Assignments for correct

pin configuration. This

diagram shows

electrical connections

only)

Data Sheet No. PD60276

IRS 20954 S

12 V

VDD

IN

CSD

VSS

COM

OCSET

LO

VCC

HO

VS

DT

CSH

VB

-B

Vcc

Speaker

+B

PWM

VREF

NC

Not recommended for new designs.

Please use IRS20957SPBF.

Not recommended for new designs. IRS20954SPBF

Please use IRS20957SPBF.

www.irf.com 2

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

V

B

High-side floating supply voltage -0.3 220

V

S

High-side floating supply voltage (Note 1) V

B

-20 V

B

+0.3

V

HO

High-side floating output voltage Vs-0.3 V

B

+0.3

V

CSH

CSH pin input voltage Vs-0.3 V

B

+0.3

V

CC

Low-side fixed supply voltage (Note 1) -0.3 20

V

LO

Low-side output voltage -0.3 V

CC

+0.3

V

DD

Floating input supply voltage -0.3 210

V

SS

Floating input supply voltage (Note 1) (see I

DDZ

) V

DD

+0.3

V

IN

PWM input voltage V

SS

-0.3 V

DD

+0.3

V

CSD

CSD pin input voltage V

SS

-0.3 V

DD

+0.3

V

DT

DT pin input voltage -0.3 V

CC

+0.3

V

OCSET

pin input voltage -0.3 V

CC

+0.3

V

REF

VREF pin voltage -0.3 V

CC

+0.3

V

I

DDZ

Floating input supply zener clamp current (Note 1) - 10

I

CCZ

Low-side supply zener clamp current (Note 1) - 10

I

BSZ

Floating supply zener clamp current (Note 1) - 10

I

OREF

Reference output current - 5

mA

d V

S

/dt Allowable V

S

voltage slew rate - 50

d V

SS

/dt Allowable V

SS

voltage slew rate (Note 2) - 50

V/ns

d V

SS

/dt Allowable V

SS

voltage slew rate upon power-up (Note 3) - 50 V/ms

P

D

Maximum power dissipation - 1.0 W

R

th,JA

Thermal resistance, junction to ambient - 115

°C/W

T

J

Junction temperature - 150

T

S

Storage temperature -55 150

T

L

Lead temperature (soldering, 10 seconds) - 300

°C

Note1: V

DD

- V

SS

, V

CC

-COM and V

B

- V

S

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; V

ss

=15 V to 200 V.

Note3: V

ss

ramps up from 0 V to 200 V.

Not recommended for new designs. IRS20954SPBF

Please use IRS20957SPBF.

www.irf.com 3

Recommended Operating Conditions

For proper operation, the device should be used within the recommended conditions below. The V

s

and COM offset

ratings are tested with supplies biased at I

DD

=5 mA, V

CC

=12 V, and V

B

-V

S

=12 V.

Symbol

Definition Min. Max. Units

V

B

High-side floating supply absolute voltage V

S

+10 V

S

+18

V

S

High-side floating supply offset voltage Note 1 100

V

I

DDZ

Floating input supply Zener clamp current 1 5 mA

V

SS

Floating input supply absolute voltage 0 200

V

HO

High-side floating output voltage V

S

V

B

V

CC

Low-side fixed supply voltage 10 18

V

LO

Low-side output voltage 0 V

CC

V

IN

PWM input voltage V

SS

V

DD

V

CSD

CSD pin input voltage V

SS

V

DD

V

DT

DT pin input voltage 0 V

CC

V

I

OREF

Reference output current to COM (Note 2) 0.3 0.8 mA

V

OCSET

pin input voltage 0.5 5 V

T

A

Ambient temperature -40 125

°C

I

PW

Input pulse width 10 (note 3) - ns

Note 1: Logic operational for V

S

equal to –5 V to +200 V. Logic state held for V

S

equal to –5 V to –V

BS

.

Note 2: Nominal voltage for V

REF

is 5 V. I

OREF

of 0.3 mA to 0.8 mA dictates total external resistor value on V

REF

to be 6.3 kΩ

to 16.7 kΩ.

Note 3: Output logic status may not respond correctly if input pulse width is smaller than the minimum pulse width

Electrical Characteristics

V

CC

, V

BS

= 12 V, I

DD

=5 mA, V

SS

=20 V, V

S

=0 V, C

L

=1 nF, and T

A

=25 °C unless otherwise specified.

Symbol

Definition

Min.

Typ.

Max.

Units

Test Conditions

Low-side Supply

UV

CC+

V

CC

supply UVLO positive threshold 8.4 8.9 9.4

UV

CC-

V

CC

supply UVLO negative threshold 8.2 8.7 9.2

V

I

QCC

Low-side quiescent current - - 3 mA V

DT

= V

CC

V

CLAMPL

Low-side Zener diode clamp voltage 19.8 20.8 21.8 V I

CC

=2 mA

High-side Floating Supply

UV

BS+

High-side well UVLO positive

threshold

8.0 8.5 9.0

UV

BS-

High-side well UVLO negative

threshold

7.8 8.3 8.8

V

I

QBS

High-side quiescent current - - 1 mA

I

LKH

High- to low-side leakage current - - 50 µA V

B

=V

S

=200 V

V

CLAMPH

High-side Zener diode clamp voltage 19.8 20.8 21.8 V I

BS

=2 mA

Floating Input Supply

UV

DD+

V

DD

, V

SS

floating supply UVLO

positive threshold

8.2 8.7 9.2

UV

DD-

V

DD

, V

SS

floating supply UVLO

negative threshold

7.7 8.2 8.7

V V

SS

=0 V

I

QDD

Floating input quiescent current - - 1 mA V

DD

=9.5 V +V

SS

V

CLAMPM

Floating input Zener diode clamp

voltage

9.9 10.4 10.9 V I

DD

=2 mA

I

LKM

Floating input side to low-side leakage

current

- - 50 µA V

DD

=V

SS

=200 V

IRS20954SPBF

IRS20954SPBF

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