16
(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.
18,19,42,4
3
PGNDR,PGNDL
Power ground for left channel H-bridge Power ground for right
channel H-bridge
14,15,22,2
3
PVCCL
38,39,46,4
7
PVCCR
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.
12
REFGND
Ground for gain control circuitry. Connect to AGND. If using a DAC to
control the volume, connect the DAC ground to this terminal.
32 RINP
2 RINN
Positive differential audio input for right channel
Negative differential audio input for right channel
27
ROSC
Current setting resistor for ramp generator. Nominally equal to 1/8*
44,45,
40,41
ROUTN, ROUTP
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
1
SD
Shutdown signal for IC (low = shutdown, high = operational). TTL logic
levels with compliance to VCC.
9
VARDIFF
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.
10
VARMAX
DC voltage that sets the maximum gain for the VAROUT outputs.
Connect to GND or AVDDREF if VAROUT outputs are unconnected.
31
VAROUTL
Variable output for left channel audio. Line level output for driving
external HP amplifier.
32
VAROUTR
VAROUTR 32 O Variable output for right channel audio. Line level
output for driving external HP amplifier.
25
VCLAMPL
VCLAMPL 25 – Internally generated voltage supply for left channel
bootstrap capacitors.
36
VCLAMPR
Internally generated voltage supply for right channel bootstrap
capacitors.
11
VOLUME
DC voltage that sets the gain of the Class-D and VAROUT outputs.
8
VREF
Analog reference for gain control section.
4
V2P5
2.5-V Reference for analog cells, as well as reference for unused audio
input when using single-ended inputs.
TPA3002D2 Internal Diagram
：
