Hyundai HPT-4205, Руководство по обслуживанию

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21
Plasma TV Service Manual 14/03/2005
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
= 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