MP7770 –2 X 45W STEREO SE OR 90W MONO BTL CLASS D AUDIO AMPLIFIER

MP7770 Rev.1.0

www.MonolithicPower.com

6

12/4/2012

MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.

© 2012 MPS. All Rights Reserved.

PIN FUNCTIONS

EP on Bottom

Pin #

EP on Top

Pin #

Name

Description

1

14

OTW

Over Temperature Warning. A low output at OTWB indicates that the

die temperature rises above 125°C. This output is open drain.

2

13

FAULT

Fault Output. A low output at FAULT indicates that the IC has detected

an over-temperature or over-current condition. This output is open

drain.

3, 12

3, 12

N/C

Not Connected.

4

4

TIMER1

Internal Timer Input for Amplifier 1. A capacitor from TIMER1 to AGND

sets the internal timer which is used for start-up pop elimination.

5

5

IN1

Inverting Input for Amplifier 1 .

6

6

REF1

7

7

AGND1

Analog Ground for Amplifier 1. Connect AGND1 to AGND2. Connect

PGND to AGND at a single point.

8

8

AGND2 Analog Ground for Amplifier 2. Connect AGND2 to AGND1.

9

9

REF2

10

10

IN2

Inverting Input for Amplifier 2.

11

11

TIMER2

Internal Timer Input for Amplifier 2. Use a capacitor from TIMER2 to

AGND to set the internal timer for start-up pop elimination.

13

2

UVP

Under-Voltage Protection Reference Input.

14

1

EN

Enable Input for Amplifier 1. Drive EN1 high to turn on the Amplifier 1,

low to turn it off.

15

15

BST2

High-Side MOSFET Bootstrap Input for Amplifier 2. Connect a

capacitor from BST2 to SW2 to supplies the gate drive to the internal

High-Side MOSFET.

16, 17

16, 17

PGND2 Power Ground for Amplifier 2. Connect PGND2 to PGND1.

18, 19

18, 19

SW2

Switched Power Output for Amplifier 2.

20, 21

20, 21

VDD2

Power Supply Input for Amplifier 2. Bypass VDD2 to PGND2 with a

1μF X7R capacitor (in addition to the main bulk capacitor), placed

close to the VDD2 and PGND2 pins.

22, 23

22, 23

VDD1

Power Supply Input for Amplifier 1. Bypass VDD1 to PGND1 with a

1μF X7R capacitor (in addition to the main bulk capacitor), placed

close to the VDD1 and PGND1 pins.

24, 25

24, 25

SW1

Switched Power Output for Amplifier 1.

26,27

26,27

PGND1

Power Ground for Amplifier 1. Connect PGND1 to PGND2. Connect

PGND to AGND at a single point.

28

28

BST1

High-Side MOSFET Bootstrap Input for Amplifier 1. A capacitor from

BST1 to SW1 supplies the gate drive current to the internal High-Side

MOSFET.