LC-37GA8EK (serv.man2). Major ICs Information - Sharp TV Service Manual (repair manual). Page 21

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64
 LC-26GA5E
 LC-32GA5E
  LC-32GA8/LC-32BV8
  LC-37GA8/LC-37BV8
2.3. IC301, IC302 (VHITDA8931T-1Y)
2.3.1. Block Diagram
9397 750 13847
© Koninklijke Philips Electronics N.V. 2005. All rights reserved.
Preliminary data sheet
Rev. 01 — 14 January 2004
3 of 31
Philips Semiconductors
TDA8931
Power comparator 1
× 20 W
6. Block diagram
Fig 1. Block diagram
001aab807
TDA8931
UVP
HEAT SPREADER
CONTROL
comparator
CONTROL
DRIVER
HIGH
STABILIZER
12V
BOOT
V
DDP
17
18
OUT
16
V
SSP
15
STABI
V
SSD
V
DDP
V
SSP
14
HVP
13
V
DDP
V
SSP
HVPI
19
DIAG
8
12
1
10
11
20
V
SSD
V
SSD
V
SSD
V
SSD
DRIVER
LOW
OVP
OVP
9
CGND
7
ENABLE
6
POWERUP
3
INN
4
INP
OCP
OTP
2
V
SSA
5
V
DDA
ODP
2.3.2. Pinning
9397 750 13847
© Koninklijke Philips Electronics N.V. 2005. All rights reserved.
Preliminary data sheet
Rev. 01 — 14 January 2004
4 of 31
Philips Semiconductors
TDA8931
Power comparator 1
× 20 W
7. Pinning information
7.1 Pinning
7.2 Pin description
Fig 2. Pin conﬁguration
TDA8931
V
SSD
V
SSD
V
SSA
HVPI
INN
V
DDP
INP
BOOT
V
DDA
OUT
POWERUP
V
SSP
ENABLE
STABI
DIAG
HVP
CGND
OVP
V
SSD
V
SSD
001aab811
1
2
3
4
5
6
7
8
9
10
12
11
14
13
16
15
18
17
20
19
Table 3:
Pin description
Symbol
Pin
Description
V
SSD
1
negative digital supply voltage; heat spreader
V
SSA
2
negative analog supply voltage
INN
3
inverting input
INP
4
non inverting input
V
DDA
5
positive analog supply voltage
POWERUP
6
power-up input
ENABLE
7
enable input
DIAG
8
diagnostic output
CGND
9
control ground; reference ground for pins POWERUP, ENABLE and DIAG
V
SSD
10
negative digital supply voltage; heat spreader
V
SSD
11
negative digital supply voltage; heat spreader
OVP
12
overvoltage protection reference input
HVP
13
half supply voltage output for charging SE capacitor
STABI
14
decoupling of internal stabilizer
V
SSP
15
negative power supply voltage
OUT
16
PWM output
BOOT
17
bootstrap capacitor connection
V
DDP
18
positive power supply voltage
HVPI
19
half supply voltage output for reference voltage of input circuitry
V
SSD
20
negative digital supply voltage; heat spreader

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