Texas Instruments TPA0202 - Manual (Page 26)

Using The TPA0202 EVM With the Plug-N-Play Evaluation Platform
3-10 Details
3.3.2.5 S5 — VDD Bridge Jumper
Jumper S5 connects the module LV
DD
power supply line to the RV
DD
power
supply line. When the TPA0202 EVM is plugged into the platform, both VDD
supplies are sourced from the same platform power bus, so the state of jumper
S5 is irrelevant.
If the EVM is used stand-alone, jumper S5 can be set to ON to simplify
connection of the module to external power, or set to OFF to allow each
amplifier channel to be powered from a separate supply.
3.3.2.6 S6 — Autosense Jumper
To automatically select the headphone inputs when the single-ended output
mode is selected by the module SE/BTL* control input, set autosense control
jumper
S6 to ON.
Jumper S6 connects the SE/BTL output mode select pin of the amplifier IC to
the HP/LINE input select pin of the amplifier IC so that the HP input is selected
automatically when the single-ended output mode is selected by the mode
signal applied to the module SE/BTL* control input pin.
Note that when autosense jumper S6 is set to ON, the headphone input and
the single-ended output mode are selected, and the SE/BTL* control signal will
have no effect, if
either jumper S3 or jumper S4 are set to ON.
3.3.2.7 S7 — SE Output Mode Switch
Pushbutton switch S7 on the TPA0202 EVM allows the manual selection of the
single-ended output mode.
When used in conjunction with mute switch S2, output thumps and pops that
might occur when returning to normal operation from the mute mode can be
eliminated by releasing mute switch S2 half a second before releasing the SE
output mode switch S7 (see the TPA0202 data sheet for more information).
In a typical application, this sequencing can be controlled by the system micro-
controller or external logic.
3.3.2.8 S8 — Junction Temperature Measurement Jumper
Set junction temperature measurement jumper S8 to OFF for normal
operation.
The TPA0202 amplifier IC sources a current proportional to the device junction
temperature that can be measured at the terminals of jumper S8 with an
ammeter. This is not intended as a real-time measurement, but as an aid to
the design and characterization of the PCB on which the IC is mounted. See
the TPA0202 IC data sheet for additional information.