MAX13301 datasheet(11/37 Pages) MAXIM

11 / 37 page

4-Channel, Automotive Class D Audio Amplifier

Pin Description (continued)

Functional Diagram

OSC

VDD5

ANALOG

AUDIO

INTERFACE

CLASS D

OUTPUT

STAGE 0

AND DIAGS

ANALOG

MODULATOR

AND

DIAGNOSTICS

REGISTERS

AND

SYSTEM

CONTROL

IN_+

IN-

VDD

GND

REF

VDD5

PGND

I2C CONTROL

INTERFACE

GATE

DRIVER 0

SCL

SDA

FB0+

FB0-

LPF

FEEDBACK

DIFF. AMP

PVDD

OUT0+

OUT0-

PGND

SYNC

CLO

MUTE_CL1

FLT_OT

VDD5

CLASS D

OUTPUT

STAGE 3

AND DIAGS

GATE

DRIVER 3

PVDD

OUT3+

OUT3-

PGND

FB3+

FB3-

LPF

FEEDBACK

DIFF. AMP

CHARGE

PUMP

CHOLD

MAX13301

NAME

FUNCTION

FLT_OT

Active-Low Open-Drain Fault and Overtemperature Output. FLT_OT provides indication of faults,

overtemperature, and thermal shutdown status.

OUT0-

Channel 0 Power Amplifier Negative Output

OUT0+

Channel 0 Power Amplifier Positive Output

OUT1-

Channel 1 Power Amplifier Negative Output

OUT1+

Channel 1 Power Amplifier Positive Output

VDD5

5V Power-Supply Input. Bypass with a 0.1FF capacitor to PGND. VDD5 provides power to the gate

drivers and charge pump.

Charge-Pump Capacitor Negative Terminal

CHOLD

Charge-Pump Output. Connect a 1FF capacitor from CHOLD to PVDD.

Charge-Pump Capacitor Positive Terminal

—

EPR

Top Side Exposed Pad. Connect this exposed pad to an external heatsink to ensure the device is

adequately cooled. The maximum power dissipation in the device is a function of this external

heatsink and other system parameters. See the Thermal Information section for more information.

The top side exposed pad is electrically isolated from the die.

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