DOWNLOAD Sharp LC-40LU700E (serv.man10) Service Manual ↓ Size: 1.63 MB | Pages: 32 in PDF or view online for FREE

LC-32/40/46LE700E/RU/S,LU700E/S,LX700E/RU,LC-52LE700E/RU/S

7 – 13

1

BOOT

I

Bootstrap Terminal
Connect the boost capacity of about 0.022

µF between SW terminals.

2

VIN

I

Input Voltage Terminal
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 .

4

GND

 -

Ground

5

FB

I

Feed Back Terminal
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. 

7

EN

I

Enable Terminal
The converter works by the High voltage impression. 

8

SS

 

-

Softstart Terminal
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

1

BOOT

I

Upper part MOS transistor boot strap capacity connection terminal. 
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

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. 

4

GND

—

Ground

5

FB

I

Feedback terminal.
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. 

7

EN

I

Enable terminal
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

µA source voltage and external soft start capacity. 

LC-32/40/46LE700E/RU/S,LU700E/S,LX700E/RU,LC-52LE700E/RU/S

7 – 15

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

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

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.

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.

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)

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