MP8044

22V, 4A Dual Channel Power Half-Bridge

M8044 Rev. 1.0

www.MonolithicPower.com

1

5/5/2010

MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.

© 2010 MPS. All Rights Reserved.

The Future of Analog IC Technology

DESCRIPTION

The MP8044 is a dual channel power half

bridge that can be configured as the output

stage of a Class-D audio amplifier. Each

channel can be driven independently as stereo

single ended audio amplifiers or driven

complementary in a bridge tied load (BTL)

audio amplifier configuration.

The MP8044 features a low current shutdown

mode, standby mode, input under voltage

protection, current limit, thermal shutdown and

fault flag signal output. Both channels of drivers

interface with standard logic signals.

The MP8044 is available in a 20-pin TSSOP

package with exposed pad.

FEATURES

• 4A Peak Current Output

• Up to 600kHz Switching Frequency

• Protected Integrated Power 0.2Ω Switches

• 30ns Switch Dead Time

• All Switches Current Limited

• Internal Under Voltage Protection

• Internal Thermal Protection

• 2.1mA Operating Current

• Fault Output Flag

• Stereo

Single

Ended

Output

Power:

8W/Channel at 22V, 8Ω Load

• Bridge Tied Load Output Power: 30W at 22V,

8Ω Load

APPLICATIONS

• Class D Audio Drivers

• Motor Drivers

“MPS” and “The Future of Analog IC Technology” are Registered Trademarks of

Monolithic Power Systems, Inc.

TYPICAL APPLICATION

MP8044

U1

POR-VFB

AGND1

PWM1

STBYB

PWM2

FAULTB

SHDNB

AGND2

POR-OUT

VDR2

VDR1

BST1

PGND1

SW1

VSP

VSP

VSP

SW2

PGND2

BST2

1

2

3

4

5

6

7

8

9

10

20

19

18

17

16

15

14

13

12

11

VCC

VCC

VDD

CN1

CN2

OUT1

OUT2

GND

PWM1

+

VCC

D4

D5

D7

D6

22

22

8

D2

1N4148

D3

1N4148

STBYB

PWM2

FAULTB

SHDNB

POR-OUT

VCC