Tpa0152 Amplifier Ic - Texas Instruments TPA0152 User Manual

Using The TPA0152 EVM With the Plug-N-Play Evaluation Platform
3.3.2.1 S1 — Shutdown Switch
Pushbutton switch S1 on the EVM allows the manual shutdown of the

TPA0152 amplifier IC.

3.3.2.2 S2 and S3 – Volume Control Switches
Pushbuttons S2 (UP) and S3 (DOWN) allow for adjustment of the volume
level.
3.3.2.3 J1 — Output Mode Jumper
To keep the module amplifier IC in the single-ended output mode regardless
of the module control input state, set jumper J1 to ON.
Jumper J1 connects the SE/BTL output mode control input pin on the amplifier
IC directly to V
output mode regardless of the state of the SE/BTL module control input. When
J1 is OFF, a pulldown resistor on the module holds the IC output mode control
input pin low, keeping the IC in the BTL output mode.
The TPA0152 amplifier IC has two separate inputs for each channel. An
internal multiplexor selects which input will be connected to the amplifier
based on the state of the SE/BTL pin on the IC.
3.3.2.4 J2 – Microprocessor Mode Jumper
The TPA0152 operates with an internal clock running at a speed of 100 Hz that
is used by the digital volume control when the jumper J2 is set to ON. However,
the amplifier may be controlled by an external microprocessor clock at a speed
of up to 45 kHz when the jumper J2 is set to OFF and the external clock signal
line is connected to the CLK IN signal input pin. Note that the internal delay
between volume level increments is disabled in microprocessor mode.
3.3.2.5 J3 and J4 – Volume Control Mode Jumpers
To control the volume with the S2 (UP) and S3 (DOWN) pushbuttons, leave
jumpers J3 and J4 set to ON. If external control signals are to be used,
set jumpers J3 and J4 to OFF and connect the control lines to the UP and
DOWN signal input pins. When the desired line is pulled low for four clock
cycles, the volume will increment by one step, followed by a short delay. This
delay will decrease the longer the line is held low, eventually reaching a delay
of zero.
3.3.2.6 PC BEEP Signal Input Pin
Leave PC BEEP signal input pin floating for normal operation.
The TPA0152 amplifier IC monitors this input for a signal when it is operating
in both the active and shutdown modes. When a signal is detected, the IC
automatically switches to this input and applies the signal to both channels.
When the signal ends, the IC switches back to the line inputs. The gain of this
input is approximately 1/4 V/V. See the TPA0152 amplifier data sheet for
additional information.
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, so that when J1 is ON, the IC is held in the single-ended
DD
Details