
21
Plasma TV Service Manual
05/01/2006
55 30 -
29 22 NC
LV
Not
connected
56 29 25 28 21 DACM_L OUT LV
Loudspeaker
out,
left
57 28 24 27 20 DACM_R OUT LV
Loudspeaker
out,
right
58 27 23 26 19 VREF2
OBL
Reference
ground
2
59 26 22 25 18 DACA_L
OUT LV
Headphone
out,
left
60 25 21 24 17 DACA_R OUT LV
Headphone
out,
right
- -
- 23
- NC
LV
Not
connected
- -
- 22
- NC
LV
Not
connected
61 24 20 21 16 RESETQ IN OBL
Power-on-reset
62 23 -
20 15 NC
LV
Not
connected
63 22 -
19 14 NC
LV
Not
connected
64 21 19 18 13 NC
LV
Not
connected
65 20 18 17 12 I2S_DA_IN2 IN LV
I
2
S2-data input
66 19 17 16 11 DVSS
OBL
Digital
ground
- -
- 15
- DVSS OBL Digital
ground
- -
- 14
- DVSS OBL Digital
ground
67 18 16 13 10 DVSUP
OBL
Digital
power
supply
5V
- -
- 12
- DVSUP OBL Digital
power
supply
5V
- -
- 11
- DVSUP OBL Digital
power
supply
5V
68 17 15 10 9
ADR_CL OUT LV
ADR
clock
12.18. TDA8928
12.18.1. Description
The TDA8928J is a switching power stage for a high efficiency class-D audio power amplifier system.
With this power stage a compact 2 x 10 W self oscillating digital amplifier system can be built, operating
with high efficiency and very low dissipation. No heatsink is required. The system operates over a wide
supply voltage range from +-7.5 V up to +-30 V and consumes a very low quiescent current.
12.18.2. Features
•
Wide Supply Voltage Range (Up to±25V ABS Max.)
•
Split Supply
•
High Output Power
•
25 + 25W @THD =10%,
RL
=
8
W,
V
S= +20V
•
No Popat Turn-On/Off
•
Mute (Pop Free)
•
Stand-By Feature (Low
I
q)
•
Short Circuit Protection
•
Thermal Overload Protection
12.18.3. Pin Connection
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