Acer Aspire 2000 Aspire 2000 Notebook Service Guide - Page 36

Electrical Characteristics No Paramete . r Symbol 1 Input voltage NV_PW R Min. 9 2 Input Iin -- current 3 Lamp IL 3.0 current 4 Lamp IL 2.7 current 4 Frequenc F 45 y 5 Output Pout -- power 6 Efficiency η 80% 7 Starting Vs voltage 1600 8 Starting Tvs 1 time 9 Dispoff# 2.8 0 10 Limited DAC- 0 lamp BRIG maximum current 11 PWM signal *Note 4 INV_PW 142 M 3.0 30 12 Lamp current overshoot I zero- -- PK 13 Current Wavefor m factor 1.27 Ip I rms 14 Unbalanc -10% e Rate Ip −I−p Irms 15 Turn off IHl -- current (Hight side) Typ. 14.8 0.33 --55 ----3.3 0.5 150 3.3 -- -- 2 0 -- Max. 21 Unit V -- A 6.8 mA 6.3 mA 65 KHz 4.5 W -- -- --- V 1.5 Sec 3.6 V 0.8 V 3.3 V Comment 7.5V (continuous) can work *Note 1 DAC=0V *Note 2 DAC=1V * Note 3 At 0'C Backlight on/off signal Low level *Note 2 158 Hz 3.6 V 100 % 10 % PWM signal frequency PWM signal amplitude Duty = -----T----o---n-----Period Line transient (10.8V to 21V/100us) and turn on transient 1.56 Multipl e I−p or I rms *10 +10% Mulitpl e 0 A PWM=30% Chapter 1 29