Terminal functions – Texas Instruments TPA3003D2 User Manual
Page 4
TPA3003D2
SLOS406A − FEBRUARY 2003 − REVISED MARCH 2003
4
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Terminal Functions
TERMINAL
I/O
DESCRIPTION
NO.
NAME
I/O
DESCRIPTION
AGND
9, 10, 26
−
Analog ground for digital/analog cells in core
AVCC
33
−
High-voltage analog power supply (8.5 V to 14 V)
AVDD
29
O
5-V Regulated output
AVDDREF
7
O
5-V Reference output—provided for connection to adjacent VREF terminal.
BSLN
13
I/O
Bootstrap I/O for left channel, negative high-side FET
BSLP
24
I/O
Bootstrap I/O for left channel, positive high-side FET
BSRN
48
I/O
Bootstrap I/O for right channel, negative high-side FET
BSRP
37
I/O
Bootstrap I/O for right channel, positive high-side FET
COSC
28
I/O
I/O for charge/discharging currents onto capacitor for ramp generator triangle wave biased at V2P5
FADE
30
I
Input for controlling volume ramp rate when cycling SD or during power-up. A logic low on this pin places
the amplifier in fade mode. A logic high on this pin allows a quick transition to the desired volume setting.
LINN
6
I
Negative differential audio input for left channel
LINP
5
I
Positive differential audio input for left channel
LOUTN
16, 17
O
Class-D 1/2-H-bridge negative output for left channel
LOUTP
20, 21
O
Class-D 1/2-H-bridge positive output for left channel
MUTE
34
I
A logic high on this pin disables the outputs. A low on this pin enables the outputs.
NC
31, 32,
35
−
Not internally connected
PGNDL
18, 19
−
Power ground for left channel H-bridge
PGNDR
42, 43
−
Power ground for right channel H-bridge
PVCCL
14, 15
−
Power supply for left channel H-bridge (tied to pins 22 and 23 internally), not connected to PVCCR or
AVCC.
PVCCL
22, 23
−
Power supply for left channel H-bridge (tied to pins 14 and 15 internally), not connected to PVCCR or
AVCC.
PVCCR
38,39
−
Power supply for right channel H-bridge (tied to pins 46 and 47 internally), not connected to PVCCL or
AVCC.
PVCCR
46, 47
−
Power supply for right channel H-bridge (tied to pins 38 and 39 internally), not connected to PVCCL or
AVCC.
REFGND
12
−
Ground for gain control circuitry. Connect to AGND. If using a DAC to control the volume, connect the DAC
ground to this terminal.
RINP
3
I
Positive differential audio input for right channel
RINN
2
I
Negative differential audio input for right channel
ROSC
27
I/O
Current setting resistor for ramp generator. Nominally equal to 1/8*VCC
ROUTN
44, 45
O
Class-D 1/2-H-bridge negative output for right channel
ROUTP
40, 41
O
Class-D 1/2-H-bridge positive output for right channel
SD
1
I
Shutdown signal for IC (low = shutdown, high = operational). TTL logic levels with compliance to VCC.
VCLAMPL
25
−
Internally generated voltage supply for left channel bootstrap capacitors.
VCLAMPR
36
−
Internally generated voltage supply for right channel bootstrap capacitors.
VOLUME
11
I
DC voltage that sets the gain of the amplifier.
VREF
8
I
Analog reference for gain control section.
V2P5
4
O
2.5-V Reference for analog cells, as well as reference for unused audio input when using single-ended
inputs.