MP8048

22V, 4A Quad Channel Power Half-Bridge

M8048 Rev. 1.1

www.MonolithicPower.com

1

9/10/2009

MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.

© 2009 MPS. All Rights Reserved.

The Future of Analog IC Technology

DESCRIPTION

The MP8048 is a configurable dual channel full-

bridge or quad channel half-bridge that can be

configured as the output stage of a Class-D

audio amplifier. Each full-bridge can be driven

independently as stereo single ended audio

amplifiers or driven complementary in a bridge

tied load (BTL) audio amplifier configuration.

The MP8048 features a low current shutdown

mode, standby mode, input under voltage

protection, current limit, thermal shutdown and

fault flag signal output. All channels of drivers

interface with standard logic signals.

The MP8048 is available in a 40 lead QFN 6X6

package.

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

• 3.4mA Operating Current

• Fault Output Flag

• Single Ended Output Power: 8W/Channel at 22V,

8Ω

• Bridge Tied Load Output Power: 30W/Channel

at 22V, 8Ω

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

BST1A

BST2B

BST2A

BST1B

VDR1B

VDR2B

VDR1A

VDR2A

PWM2A

STBYB

MP8048

PWM2B

PWM1A

PGND1B

PGND1B

PGND2A

PWM1B

FAULTB

SHDNB

AGND

AGND

OUT1A

OUT1B

OUT2A

OUT2B

PWM1A

VDD

VDD

C1

1000uF

35V

C15

1000uF

35V

C2

1uF

C5

0.1uF

C6

0.1uF

C13

0.1uF

C9

0.1uF

C3

0.22uF

C7

0.22uF

C10

0.22uF

C14

0.22uF

C8

0.1uF

C4

0.47uF

C12

0.47uF

22uH

22uH

22uH

22uH

C16

1uF

C11

0.1uF

D1

L1

CN1

CN2

L2

L3

L4

D6

U1

D4

D8

PWM2A

STBY

PWM2B

PWM1B

FAULT

SHDN