Dc-Ac Inverter 12.1" (For 888F1A); Description; Features; Electrical Characteristics - Toshiba Satellite 1700 Series Maintenance Manual

1 Hardware Overview
1.9

DC-AC INVERTER 12.1" (For 888F1A)

1.9.1

Description

The inverter is designed to light up the CCFL of LCD. The input voltage is fixed at +5V. It
can also adjust the backlight by using an analog signal that comes from NS87570.
1.9.2

Features

Fixed input voltage : +5V
Automatic brightness compensation for input voltage variation
Remote ON/OFF control
Digital brightness control
Slim size 130x20x6.2 (mm)
1.9.3

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

1.9 DC-AC INVERTER 12.1" (For 888F1A)

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