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1.2
TPA3101D2 EVM Specifications
2
Operation
2.1
Quick Start List for Stand-Alone Operation
Operation
V
CC
Supply voltage range
10 V to 26 V
I
CC
Supply current
4 A max
P
O
Continuous output power per channel, 8
Ω
, V
CC
= 18 V, THD + N = 0.1%
10 W
R
L
Minimum load impedance
3.2
Ω
Follow these steps to use the TPA3101D2 EVM stand-alone or when connecting it into existing circuits or
equipment. Connections to the EVM module can be made using banana plugs for the power supply and
output connections. The inputs accept standard RCA plugs.
2.1.1
Power Supply
1. Ensure that all external power sources are set to OFF.
2. Connect an external regulated power supply adjusted from 10 V – 26 V to the module V
CC
(J7) and
GND (J8) banana jacks taking care to observe marked polarity.
2.1.2
Evaluation Module Preparations
2.1.2.1
Inputs and Outputs
1. If connecting to a fully differential input or a grounded input (the shield of the RCA jack is GND),
remove jumpers J9 and J10 from the EVM board. These are located next to the input jacks J1 and J2.
If connecting to a floating source, like a portable CD player, install J9 and J10. After setting the J9 and
J10 jumpers appropriately, connect the audio source to J1 (RIGHT) and J2 (LEFT).
2. Connect a speaker across ROUT+ (J6) and ROUT- (J5). Connect another speaker across LOUT+ (J3)
and LOUT- (J4).
3. Install both gain jumpers GAIN0 (J12) and GAIN1 (J13). This sets the gain of the amplifier to the
lowest level, 20 dB.
4. Remove the jumper at MSTR/SLV (J14). If only one TPA3101D2 is evaluated, it must be configured as
the master. If multiple EVMs are connected together using the SYNC output (TP2), the additional
EVMs must be configured in the slave mode by installing the J14 jumper.
5. Remove the jumper J11. This places the device in a latched mode when a short-circuit event occurs.
2.1.2.2
Control Inputs
1. SD: This terminal is active low. A low signal on the device terminal (< 0.8 V) shuts down the amplifier;
a high signal (> 2 V) on the device terminal places the amplifier in the active state. Holding down
switch S1 places the amplifier in the SHUTDOWN state. Releasing S1 returns the amplifier to the
active state.
2. MUTE: This terminal is active high. A high signal (> 2 V) on this terminal immediately terminates audio
playback through the speakers and the outputs stop switching; a low signal (< 0.8 V) enables the
device. S2 on the EVM controls the state of the MUTE terminal. Holding down switch S2 places the
amplifier in the MUTE state. Releasing S2 returns the amplifier to the active state.
3. GAIN0/GAIN1: Together, these terminals determine the gain of the amplifier. Refer to
Installing a jumper in J12 or J13 sets the respective terminal to GND. Removing the jumper sets the
respective terminals to VREG (~4 V). Removing jumpers INCREASES the gain while installing jumpers
DECREASES the gain. Logic levels are TTL compatible.
4. MSTR/SLV: This terminal is used with the SYNC (TP2) output to synchronize the switching
frequencies of multiple TPA3101D2 devices. For example, with 2 devices, one would be configured as
the MASTER by removing the J14 jumper. The other EVM would be configured as the SLAVE device
by installing a jumper in the J14 location. Logic levels are TTL compatible.
SLOU180 – December 2005
TPA3101D2 Audio Power Amplifier Evaluation Module With LC Filter
3
