Sony HCD-DX400 Service Manual page 20

HCD-DX400
MAIN BOARD IC8 TDA7492 (50W + 50W dual BTL Class-D audio amplifi er)
Pin No. Pin Name
1 SUB_GND
2, 3 OUTPUTB
4, 5 PGNDB
6, 7 PVCCB
8, 9 OUTNB
10, 11 OUTNA
12, 13 PVCCA
14, 15 PGNDA
16, 17 OUTPA
18 PGND
19 VDDPW
20 STBY
21 MUTE
22 INPA
23 INNA
24 ROSC
25 SYNCLCK
26 VDDS
27 SGND
28 DIAG
29 SVR
30 GAIN0
31 GAIN1
32 INPB
33 INNB
34 VREF
35 SVCC
36 VSS
20
I/O
- Connect to the frame
- Positive PWM for right channel
- Power stage round for right channel
- Power supply for right channel
O Negative PWM output for right channel
O Negative PWM output for right channel
- Power supply for left channel
- Power stage round for left channel
O Positive PWM output for left channel
- Power stage Ground
O 3.3 V (nominal) regulator output referred to ground for power stage
I Standby mode control
I Mute mode control
I Positive differential input of left channel
I Negative differential input of left channel
O Master oscillator frequency-setting pin
I/O Clock in/out for external oscillator No used
- 3.3 V (nominal) regulator output referred to gnd for signal blocks
- Signal Ground
O Open-drain diagnostic output
- Supply voltage rejection
I Gain setting input 1
I Gain setting input 2
I Positive differential input of right channel
I Negative differential input of right channel
- Half VDDS (nominal) referred to ground
- Signal power supply
- 3.3 V (nominal) regulator output referred to power supply
Description