3.1 BTL Plus Two SE (2.1) Operation
Configure the EVM as follows for 2 SE + 1 BTL operation:
Table 5. 2 SE + 1 BTL Default Jumper States
| Jumper |
Setting |
Comment |
| J29 |
IN |
PVDD to 15-V BUCK |
| J31 |
IN |
12-V LDO to 12-V TERM |
| J32 |
IN |
3.3-V LDO to 3.3-V TERM |
| J33 |
IN |
3.3-V LDO to 3.3-V TERM |
| J21 |
IN |
CSTART SE |
| J16 |
3 to 4 |
MASTER MODE |
| J5 |
1 to 2 |
M1 – 2XSE + BTL |
| J6 |
2 to 3 |
M2 - 2XSE + BTL |
| J22 |
IN |
OUTA CAP SHUNT |
| J23 |
IN |
OUTB CAP SHUNT |
| J24 |
OUT |
OUTC CAP SHUNT |
| J25 |
OUT |
OUTD CAP SHUNT |
| J26 |
2 to 3 |
INC SELECT |
| J27 |
2 to 3 |
IND SELECT |
| J7 |
OUT |
PBTL SELECT INC |
| J8 |
OUT |
PBTL SELECT IND |
| J10 |
OUT |
INC/D DIFF INPUT |
| J12 |
OUT |
INC/D DIFF INPUT |
| J4 |
1 to 2 |
INA/B SE INPUT |
| J19 |
1 to 2 |
INC/D SE INPUT |
- Set J6 to L and J5 to H.
- Connect left (stereo) speaker/power resistor load (2–4 Ω) positive terminal to OUTC and remove jumper J24.
- Connect right (stereo) speaker/power resistor load (2–4 Ω) positive terminal to OUTD and remove jumper J25.
- Connect subwoofer (mono) speaker/power resistor load (4–8 Ω) positive terminal to OUTA and negative terminal to OUTB.
- Set J19 jumper position to DIFF.
- Connect left (stereo) channel input to female RCA jack input C/CD (WHITE) for OUTC speaker.
- Connect right (stereo) channel input to female RCA jack input D (BLACK) for OUTD speaker.
- For single-ended subwoofer (mono) input, connect RCA male jack to female RCA jack input A/AB (RED) and set J4 jumper positions to SE.
- For differential subwoofer (mono) inputs, connect positive RCA male jack to female RCA jack input A/AB (RED) and connect negative RCA male jack to female RCA jack input B (YELLOW) and set J4 jumper positions to DIFF.
NOTE
OUTC and OUTD are the single-ended output channels and OUTA and OUTB are the BTL channel for 2.1 operations.