MP8046

28V, 5A Dual Channel Power Half-Bridge

MP8046 Rev. 0.92

www.MonolithicPower.com

1

4/29/2010

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© 2010 MPS. All Rights Reserved.

The Future of Analog IC Technology

DESCRIPTION

The MP8046 is a configurable full-bridge or

dual channel 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 MP8046 features a low current shutdown

mode, standby mode, input under voltage

protection, current limit, thermal shutdown and

fault flag signal output. Both channels of the

driver interface with standard logic signals. The

MP8046 is available in a 20-pin TSSOP (with

Exposed Pad) package.

FEATURES

• ±5A Peak Current Output

• Up to 600kHz Switching Frequency

• Protected Integrated 165mΩ Power Switches

• 30ns Switch Dead Time

• All Switches Current Limited

• Internal Under Voltage Protection

• Internal Thermal Protection

• 2.4mA Operating Current

• Fault Output Flag

• Stereo

Single

Ended

Output

Power:

20W/Channel at 24V, 4Ω Load

• Bridge Tied Load Output Power: 40W at 24V,

8Ω Load

APPLICATIONS

• Class D Audio Drivers

• Full or Half-Bridge DC-DC Switching

Regulators

• Motor Drivers

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

Monolithic Power Systems, Inc.

TYPICAL APPLICATION

MP8046

U1

NC

AGND1

PWM1

STBY

PWM2

FAULT

SHDN

AGND2

NC

VDR2

VDR1

BST1

PGND1

OUT1

VDD1

NC

VDD2

OUT2

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

D5

D2

1N4148

STBY

PWM2

FAULT

SHDN