Dc-Ac Inverter 12.1" (For 888F1G); Description; Features; Electrical Characteristics - Toshiba Satellite 1700 Series Maintenance Manual

1 Hardware Overview
1.10

DC-AC INVERTER 12.1" (For 888F1G)

1.10.1

Description

The inverter is designed to light up the CCFL of LCD. Its input voltage is fixed at +5V. It
can also adjust the backlight by using a analog signal which comes from NS87570.
1.10.2

Features

Fixed input voltage : +5V
Automatic brightness compensation for input voltage variation
Remote ON/OFF control
Digital brightness control
Slim size 130x20x6.2 (mm)
1.10.3

Electrical characteristics

Ta=25°C
ITEM
Input
Input current
Efficiency
No load backlight
voltage
Lamp current
Driving frequency
PWM duty Cycle
PWM frequency
Operating temperature : 0°C∼55°C
Storage temperature : -20°C∼+80°C
Satellite 1700 Series Maintenance Manual

1.10 DC-AC INVERTER 12.1" (For 888F1G)

SYMBOL MIN. TYP.
Vin 4.75 4.9
Iin --- ---
η
80 85
V CCFL 1000 ----
I CCFL 3.0 ----
f 40 50
D 30
pf 150
MAX. UNIT COMMENT
5.05 V
1.0 A
---- %
---- Vrms
7.0 mArms Inverter control
Lamp current
range.
60 KHz max. brightness
load
100 %
Hz
1-25