Sharp LC-32SH25E, Service Manual

Page: 51 / 113

2008-03-14
LC-32SH25E
51
Symbol Pin Description
VSSD(HW)
1
negative digital supply voltage and handle wafer connection
IN1P
2
positive audio input for channel 1
IN1N
3
negative audio input for channel 1
DIAG
4
diagnostic output; open-drain
ENGAGE
5
engage input to switch between Mute mode and Operating mode
POWERUP
6
power-up input to switch between Sleep mode and Mute mode
CGND
7
control ground; reference for POWERUP, ENGAGE and DIAG
VDDA
8
positive analog supply voltage
VSSA
9
negative analog supply voltage
OSCREF
10
input internal oscillator setting (only master setting)
HVPREF
11
decoupling of internal half supply voltage reference
INREF
12
decoupling for input reference voltage
TEST
13
test signal input; for testing purpose only
IN2N
14
negative audio input for channel 2
IN2P
15
positive audio input for channel 2
VSSD(HW)
16
negative digital supply voltage and handle wafer connection
VSSD(HW)
17
negative digital supply voltage and handle wafer connection
DREF
18
decoupling of internal (reference) 5 V regulator for logic supply
HVP2
19
half supply output voltage 2 for charging single-ended capacitor for channel 2
VDDP2
20
positive power supply voltage for channel 2
BOOT2
21
bootstrap high-side driver channel 2
OUT2
22
Pulse Width Modulated (PWM) output channel 2
VSSP2
23
negative power supply voltage for channel 2
STAB2
24
decoupling of internal 11 V regulator for channel 2 drivers
STAB1
25
decoupling of internal 11 V regulator for channel 1 drivers
VSSP1
26
negative power supply voltage for channel 1
OUT1
27
PWM output channel 1
BOOT1
28
bootstrap capacitor for channel 1
VDDP1
29
positive power supply voltage for channel 1
HVP1
30
half supply output voltage 1 for charging single-ended capacitor for channel 1
OSCIO
31
oscillator input in slave configuration or oscillator output in master configuration
VSSD(HW)
32
negative digital supply voltage and handle wafer connection
2.5. U602 (WM8521H9GED/RV SOIC-14)
2.5.1 Block Diagram