Acer 270 User Manual
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Chapter 1
There are two control signals that come form system to control lamp brightness. One signal is
named DAC_BRIG, which limits current to meet LCD lamp current specification. Another one is
named PWM, which adjusts lamp brightness. This inverter brightness is adjusted by PWM burst
mode. The PWM burst mode is that turning on and off the lamp at rate of 150Hz. The effective
brightness is a function of the duty cycle.
Features
1. Wide range 9V to 21V input voltage.
2. Birghtness adjustment by PWM duty mode.
Battery
Item
Specification
Vendor & model name
Panasonic
Battery Type
Li-ion
Pack capacity
57Wh
Cell voltage
3.7V/cell
Number of battery cell
8
Package configuration
4 cells in series, 2 series in parallel
Package voltage
14.8V
LCD Inverter Specification
This inverter is designed to light up the CCFL of LCD for TravelMate 270 series notebook. It should be
supported the following LCD panels.
No.
Supplier
Model
Type
1
LG
LP150x04
TFT, 15.0” XGA
2
Hitachi
TX38D85
TFT, 15.0” XGA
3
CPT
CLAA14/XF01
TFT, 14.1” XGA
4
CPT
CLAA150PA01
TFT, 15.0” SXGA+
5
LG
LP150E0/-A2M2
TFT, 15.0” SXGA+
6
IBM
ITSX95C
TFT 15.0” XGA
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