Precautions
3.1 Precautions
Power Supply Input Polarity and Maximum Voltage
Always ensure that the polarity and voltage of the external power connected to VCC power input connector J1, J2, and/or VDD power input connector J6 are correct. Overvoltage or
Inserting or Removing EVM Boards
Do not insert or remove EVM boards with power applied ± damage to the EVM board, the platform, or both may result.
Figure 3±1. The TI Plug-N-Play Audio Amplifier Evaluation Platform
Power Input
Audio
Input
SOURCE | DC | JP1 | JP2 | JP3 | F1 |
| C1+ | Off | |
|
|
|
|
|
|
| |||
|
|
|
|
|
|
|
|
| |
J1 VCC In + | VCC(J1) | (J2) | AC/DC | Batt | VR1 |
|
| Pwr | |
|
|
|
| ||||||
J2 AC/DC In | D3 | D2 |
| D1 |
|
|
|
|
|
D4 |
|
|
|
|
|
|
|
|
|
Right In | J3 |
|
|
|
| VCC | LED1 | R1 |
|
|
|
|
|
|
|
|
|
| |
|
| Signal Conditioning |
| ||||||
Stereo In | J4 |
|
|
|
|
|
| U1 |
|
|
|
|
|
|
|
|
|
| |
Left In | J5 |
|
|
|
|
|
|
|
|
|
|
|
|
| ****CAUTION**** |
| |||
|
|
|
| Do not insert or remove | |||||
1997 | TEXAS INSTRUMENTS |
| EVM boards with power | ||||||
|
|
| applied |
| |||||
|
|
|
|
|
|
| |||
Evaluation Platform
SLOP097 Rev. C.1
On | ICC | |
| JP4 | |
S1 | ||
|
| B1 |
|
| IDD | JP5 |
| Audio |
|
| Power |
|
| Amps |
|
S2 | Off |
|
Conditioning | On |
|
U5
TP1
GND
R2
U3
U4
U5 | |||
|
|
| |
|
|
|
|
Source | HP | ||
SUPPLY | POWER | U6 |
| F2 |
| VR2 |
| Power | ||
|
|
|
|
|
|
|
|
|
| DC |
|
|
|
|
|
|
|
|
| + | In/Out |
|
|
|
|
|
|
|
|
|
| |
|
|
|
|
|
|
| VDD In/Out | J6 |
| |
VDD | LED2 |
|
| J7 |
|
|
|
| ||
|
| Right Out |
|
|
|
| ||||
|
|
|
|
|
| J8 + |
|
|
|
|
U2 |
|
|
|
| Out | Right |
|
|
| Speaker |
|
|
|
|
| ± |
|
|
| ||
|
|
|
|
|
|
|
|
|
| |
|
|
|
|
|
|
|
|
|
| Output |
|
|
|
|
|
| + |
|
|
|
|
|
|
|
|
| Left Out |
|
|
|
| |
|
| JP6 |
| Mode | ± |
|
|
|
| |
|
|
| Mute |
|
|
|
| |||
|
|
|
|
|
|
|
|
| ||
HP(U5) | Polarity | Out |
|
|
|
|
| |||
JP7 |
| JP8 |
|
|
|
|
| |||
|
| Lo |
|
| J9 |
|
|
|
| |
|
| Hi |
|
|
| Left |
|
|
|
|
|
|
|
|
|
|
|
|
|
| |
|
|
|
|
|
| Stereo |
|
| ||
S3 | + |
| C3 |
|
|
|
|
| Headphone | |
|
|
|
| J10 |
| Output | ||||
|
| + |
| C2 |
|
|
|
| ||
R3 |
|
| HP Out |
|
| |||||
|
|
|
|
|
|
| ||||
|
|
|
|
|
|
|
|
|
| |
R4 |
|
|
|
|
|
|
| R5 |
|
|
Details |
