Datasheet
SPOM
Class-D
Speaker
Amplifier
26
Class-DGain(R73-D7-D6)
Class-DEnable
(R73-D3)
Gain:
0to+18dB
6dBsteps
LEFT_LOP
SPVDDL
SPVSSL
25 24
SWOUTP
SWOUTM
29
28
SWINP
SWINM
2730
PowerSupplies
BypassSwitch
(R73-D1)
BypassSwitch
Bootstrap
ClockEnable
(R73-D0)
SPOP
23
+6db
LEFT_LOM
+
-
TLV320AIC3107
www.ti.com
SLOS545D –NOVEMBER 2008–REVISED DECEMBER 2014
2. 0x0D 0x0D
3. 0x08 0x5C
4. 0x08 0x5D
5. 0x08 0x5C
6. 0x00 0x00
Also available is an analog bypass switch to allow a signal (0.35V to 2.8V) to be input at SWINP and SWINM
and output at SWOUTP and SWOUTM. In a typical application, SWOUTP and SWOUTM are connected to
SPOP and SPOM respectively so as to provide an alternate method of driving the 8-Ω speaker. These bypass
switches have low on-resistance, so an external power amplifier can be used to drive a speaker directly through
these switches. When the Bypass Switch is enabled (Register 76, D1=1), enabling the Bypass Switch Bootstrap
Clock (Register 76, D0=1) is recommended.
Figure 28. Differential Class-D Speaker Circuit
10.3.11 Short Circuit Output Protection
The TLV320AIC3107 includes programmable short-circuit protection for the high power output drivers, for
maximum flexibility in a given application. By default, if these output drivers are shorted, they will automatically
limit the maximum amount of current that can be sourced to or sunk from a load, thereby protecting the device
from an overcurrent condition. In this mode, the user can read Page-0/Reg-95 to determine whether the part is in
short-circuit protection or not, and then decide whether to program the device to power down the output drivers.
However, the device includes further capability to automatically power down an output driver whenever it does
into short-circuit protection, without requiring intervention from the user. In this case, the output driver will stay in
a power down condition until the user specifically programs it to power down and then power back up again, to
clear the short-circuit flag.
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