T E C H NI CA L INFO RMA T IO N
5
Pin Description
Pin
Function
Description
1,13
VB2,VB1
Bootstrapped voltages supply drive to gates of high-side FET’s
2
VGG
Regulated output of onboard switching regulator
3
PGND
Power ground
4,12
VP2,VP1
Positive power supply connections
5
SW12V
Switching node
6,11
VS2,VS1
Source voltage for high side FET’s
7,10
OUT2,OUT1
Power FET outputs
8,9
VN2,VN1
Negative power supply connections
14
SWFB
Feedback for onboard regulator
15
SLEEP
When set to logic high, both amplifiers are muted and in low power (idle)
mode. When low (grounded), both amplifiers are fully operational. If left
floating, the device stays in the mute mode. Ground if not used.
16
PSMUTE
A logic high output indicates the amplifiers are muted
17
OVRLD/SCL
Dual function pin:
OVRLD – A logic high output indicates that the level of the input signal has
overloaded the amplifiers, signifying increased distortion
SCL – When tied to V5 through a pull-up resistor, this pin becomes the serial
clock line of the serial control bus
18
HMUTE/SDA
Dual function pin:
HMUTE – A logic high output indicates that the output stages of both
amplifiers are shut off and muted.
SDA – When OVRLD/SCL is tied to V5 through a pull up resistor, this pin
becomes the serial data line of the serial control bus
19
MUTE
When set to logic high, both amplifiers are muted. When set to logic low or
grounded both amplifiers are fully operational. Ground if not used.
20
MIS/ADDR
Dual function pin:
MIS – When control/status of the device is via analog pins, the voltage level
ion this pint sets the Mute-in –silence threshold
ADDR – When OVRLD/SCL is tied to V5 through a pull up resistor, the voltage
on this pin selects the chip address of the device for the serial control bus
21
V5
5V power supply
22
AGND
Analog Ground
23,24
INP1,INP2
Inputs for channels 1 and 2
25,26
AUXOUT1,AUXOUT2
Auxiliary outputs that provide a low impedance, buffered audio output
where the signal level is set by the volume control
27
V2BG
Bandgap reference
28
DCVOL
When control/status of the device is via analog pins, the voltage level on this
pin sets the output signal volume
29,31
FDBKN1,FDBKN2
Feedback for channels 1 and 2
30,32
GNDKELVIN1
GNDKELVIN2
Kelvin connection to speaker ground channels 1 and 2
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