MAX13301 Datasheet, PDF (11/37 Pages) Maxim Integrated Products – 4-Channel, Automotive Class D Audio Amplifier Feedback After the Filter

4-Channel, Automotive Class D Audio Amplifier
Pin Description (continued)
PIN
NAME
FUNCTION
34
FLT_OT ^{Active-Low Open-Drain Fault and Overtemperature Output. FLT_OT provides indication of faults,}
overtemperature, and thermal shutdown status.
35
OUT0- Channel 0 Power Amplifier Negative Output
36
OUT0+ Channel 0 Power Amplifier Positive Output
41
OUT1- Channel 1 Power Amplifier Negative Output
42
OUT1+ Channel 1 Power Amplifier Positive Output
44
VDD5
5V Power-Supply Input. Bypass with a 0.1FF capacitor to PGND. VDD5 provides power to the gate
drivers and charge pump.
45
CM
Charge-Pump Capacitor Negative Terminal
46
CHOLD Charge-Pump Output. Connect a 1FF capacitor from CHOLD to PVDD.
47
CP
Charge-Pump Capacitor Positive Terminal
Top Side Exposed Pad. Connect this exposed pad to an external heatsink to ensure the device is
—
EPR
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.
Functional Diagram
VDD5
PGND
IN_+
IN-
V_DD
GND
REF
SCL
SDA
OSC
ANALOG
AUDIO
INTERFACE
I2C CONTROL
INTERFACE
CLO
MUTE_CL1
EN
FLT_OT
SYNC
REGISTERS
AND
SYSTEM
CONTROL
ANALOG
MODULATOR
AND
DIAGNOSTICS
VDD5
GATE
DRIVER 0
LPF
LPF
VDD5
GATE
DRIVER 3
MAX13301
CLASS D
OUTPUT
STAGE 0
AND DIAGS
FEEDBACK
DIFF. AMP
FEEDBACK
DIFF. AMP
CLASS D
OUTPUT
STAGE 3
AND DIAGS
CHARGE
PUMP
PVDD
OUT0+
OUT0-
PGND
FB0+
FB0-
FB3+
FB3-
PVDD
OUT3+
OUT3-
PGND
CP
CM
CHOLD
11