User's Manual

30 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 to21V input voltage.
2. Birghtness adjustment by PWM duty mode.
Battery
Item Specification
Vendor & model name Sony
Battery Type Li-ion
Pack capacity 57Wh
Cell voltage 3.7V/cell
Number of battery cell 12
Package configuration 4 cells in series, 3 series in parallel
Package voltage 14.8v
LCD Inverter Specification
This inverter is designed to light up the CCFL of LCD for Aspire 1400 notebook. It should be
supported the following LCD panels.
No. Supplier Model Type
1 LG LP150x04 TFT, 15.0” XGA
2 Hanstar HSD150PX11-A TFT, 15.0” XGA
3 Unipac UB150XN01 TFT, 15.0” XGA
4 IBM ITUX97C TFT, 15.0” UXGA
5 Toshiba LTM14C506 TFT, 14.1” XGA
6 Unipac UB141X03 TFT, 14.1” XGA
7 Hanstar HSD141PX11-B TFT, 14.1” XGA
8 CPT CLAA150PA01 TFT, 15.0” SXGA+
9 Hanstar HSD1509K11-A TFT, 15.0” SXGA+
10 Sharp LQ150X1LH63 TFT 15.0” XGA