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18,19,42,4
PGNDR,PGNDL
3
14,15,22,2
PVCCL
3
38,39,46,4
PVCCR
7
12
REFGND
32
RINP
2
RINN
27
ROSC
44,45,
ROUTN, ROUTP
40,41
1
SD
9
VARDIFF
10
VARMAX
31
VAROUTL
32
VAROUTR
25
VCLAMPL
36
VCLAMPR
11
VOLUME
8
VREF
4
V2P5
TPA3002D2 Internal Diagram：
All manuals and user guides at all-guides.com
(34) is a logic high, the MODE_OUT
pin is driven low. When the MODE pin (34) is a logic low, the
MODE_OUT pin is driven high. This pin is
intended for MUTE control of an external headphone amplifier. Leave
unconnected when not used for
headphone amplifier control.
Power ground for left channel H-bridge
channel H-bridge
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.
Ground for gain control circuitry. Connect to AGND. If using a DAC to
control the volume, connect the DAC ground to this terminal.
Positive differential audio input for right channel
Negative differential audio input for right channel
Current setting resistor for ramp generator. Nominally equal to 1/8*
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
Shutdown signal for IC (low = shutdown, high = operational). TTL logic
levels with compliance to VCC.
DC voltage to set the difference in gain between the Class-D and
VAROUT outputs. Connect to GND or AVDDREF if VAROUT outputs
are unconnected.
DC voltage that sets the maximum gain for the VAROUT outputs.
Connect to GND or AVDDREF if VAROUT outputs are unconnected.
Variable output for left channel audio. Line level output for driving
external HP amplifier.
VAROUTR 32 O Variable output for right channel audio. Line level
output for driving external HP amplifier.
VCLAMPL 25 – Internally generated voltage supply for left channel
bootstrap capacitors.
Internally generated voltage supply for right channel bootstrap
capacitors.
DC voltage that sets the gain of the Class-D and VAROUT outputs.
Analog reference for gain control section.
2.5-V Reference for analog cells, as well as reference for unused audio
input when using single-ended inputs.
Power ground for right
16
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