Sharp LC-40LE700E (serv.man9) Service Manual ▷ View online
LC-32/40/46LE700E/RU/S,LU700E/S,LX700E/RU,LC-52LE700E/RU/S
7 – 13
2.8. IC9604, IC9606 (VHiLV58072M-1Y)
2.8.1 Block Diagram
2.8.2 Pin Connections and short description
Pin No.
Pin Name
I/O
Pin Function
1
BOOT
I
Bootstrap Terminal
Connect the boost capacity of about 0.022
Connect the boost capacity of about 0.022
µF between SW terminals.
2
VIN
I
Input Voltage Terminal
Connect very big capacity between GND.
Connect very big capacity between GND.
3
SW
O
Power Switch Terminal
Connect output LC filter. Moreover connect the above-mentioned capacity between BOOT terminals .
Connect output LC filter. Moreover connect the above-mentioned capacity between BOOT terminals .
4
GND
-
Ground
5
FB
I
Feed Back Terminal
The output voltage is set by the division resistance between the output voltages.
The output voltage is set by the division resistance between the output voltages.
6
COMP
I
Phase Compensation Terminal
The phase amends external capacity and the resistance of the DC/DC converter close loop are connected.
The phase amends external capacity and the resistance of the DC/DC converter close loop are connected.
7
EN
I
Enable Terminal
The converter works by the High voltage impression.
The converter works by the High voltage impression.
8
SS
-
Softstart Terminal
The soft start time is set by built-in 10
The soft start time is set by built-in 10
µA source voltage and external soft start capacity.
LC-32/40/46LE700E/RU/S,LU700E/S,LX700E/RU,LC-52LE700E/RU/S
7 – 14
2.9. IC9605/IC9608 (VHiLV5893M+-1Y)
2.9.1 Block Diagram
2.9.2 Pin Connections and short description
Pin No.
Pin Name
I/O
Pin Function
1
BOOT
I
Upper part MOS transistor boot strap capacity connection terminal.
Connect the boot capacity of about 0.022
Connect the boot capacity of about 0.022
µF between SW terminals.
The boot capacity series resistance (about100
Ω) is effective for stable operation.
2
VIN
I
Input power source terminal.
Connect very big capacity (10
Connect very big capacity (10
µF 2 or more) between GND.
3
SW
I
Power switch terminal.
Connect the output LC filter. Connect the above-mentioned capacity between BOOT terminals.
Connect the output LC filter. Connect the above-mentioned capacity between BOOT terminals.
4
GND
—
Ground
5
FB
I
Feedback terminal.
The output voltage is set by the division resistance of output voltage (Vout-FB-GND).
The output voltage is set by the division resistance of output voltage (Vout-FB-GND).
6
COMP
I
Phase compensation terminal.
Connect external capacity and resistance for the phase compensation of the DC/DC converter close loop.
Connect external capacity and resistance for the phase compensation of the DC/DC converter close loop.
7
EN
I
Enable terminal
It operates the converter by a high voltage or the opening. It stops with GND the converter operation.
It operates the converter by a high voltage or the opening. It stops with GND the converter operation.
8
SS
—
Soft start terminal.
The soft start time is set by built-in 10
The soft start time is set by built-in 10
µA source voltage and external soft start capacity.
LC-32/40/46LE700E/RU/S,LU700E/S,LX700E/RU,LC-52LE700E/RU/S
7 – 15
2.10. IC8455 (VHiM24C64WN-1Y)
2.10.1 Block Diagram
2.10.2 Pin Connections and short description
Pin No.
Pin Name
I/O
Pin Function
1
E0
I
Chip Enable Input
2
E1
I
Chip Enable Input
3
E2
I
Chip Enable Input
4
Vss
-
Ground
5
SDA
I/O
Serial data
6
SCL
I
Serial clock
7
WC#
I
Write Control
8
VCC
-
Power supply
M24C64
Shift
EEPROM
Register
XDEC
MEMORY
CONTROL
LOGIC
GENERATOR
HV
Address Register
and Counter
and Counter
Data Register
YDEC
1 page
I/O
SCL
E2
E1
E0
WC#
SDA
LC-32/40/46LE700E/RU/S,LU700E/S,LX700E/RU,LC-52LE700E/RU/S
7 – 16
2.11. IC506 (VHiM3221EiP-1Y)
2.11.1 Block Diagram
2.11.2 Pin Connections and short description
Pin No.
Pin Name
I/O
Pin Function
1
EN
I
Receiver Enable Control . Drive low for normal operation. Drive high to force the receiver outputs (R_OUT)
into a high-impedance state.
into a high-impedance state.
2
C1+
-
Positive terminal of the voltage doubler Charge-Pump Capacitor
3
V+
-
+5.5V generated by the charge pump
4
C1-
-
Negative terminal of the voltage doubler Charge-Pump Capacitor
5
C2+
-
Positive terminal of inverting Charge-Pump Capacitor
6
C2-
-
Negative terminal of inverting Charge-Pump Capacitor
7
V-
-
-5.5V generated by the charge pump
8
R_IN
I
RS-232 Receiver Inputs
9
R_OUT
O
TTL/CMOS Receiver Outputs
10
INVALID
I
Output of the Valid Signal Detector. INVALID is enabled high if a valid RS-232 level is present on any receiver
input.
input.
11
T_IN
I
TTL/CMOS Transmitter Inputs
12
FORCEON
I
Drive high to override automatic circuitry keeping transmitters and charge pump on (FORCEOFF must be
high)
high)
13
T_OUT
O
RS-232 Transmitter Outputs
14
GND
-
Ground
15
VCC
-
+3.0V to +5.5V Supply Voltage
16
FORCEOFF
I
Force-Off Input, active low. Drive low to shut down transmitters, receivers (MAX3243E, except R2OUTB),
and on-board charge pump . This overrides all automatic circuitry and FORCE ON
and on-board charge pump . This overrides all automatic circuitry and FORCE ON
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