Specifications

ACY25 14.1” & 15” INVERTER SPECIFICATION
General Description
There are two control signals that come from 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 a rate of 150Hz. The
effective brightness is a function of the duty cycle.
Features
Wide range 9V to 21V input voltage
Brightness adjustment by PWM burst mode.
Close loop controls lamp current.
Absolute maximum rating
Environment: Temperature:
Operating temperature: 0 ℃ ~ 55 ℃
Storage temperature : -20 ℃ ~ 70 ℃
Humidity: 0 ~ 90% without condensation
MTBF: 50000 hours.
Electrical characteristic
No Item Symbol Min. Typ. Max. Unit Comment
1 Input voltage INV_PWR 9 14.8 21 V
2 Input current Iin -- 0.33 -- A
3 Lamp current I
L
2.7 -- 6.3 mA *Note 1
4 Frequency F 45 55 65 KHz *Note2
5 Output power Pout -- -- 4.5 W
6 Efficiency
η
80% -- -- --
7 Starting voltage V
s
1600 -- -- V At 0’C
8 Starting time Tvs 1 -- 1.5 Sec
2.8 3.3 3.6 V Backlight on/off signal
9 Dispoff#
0 0.5 0.8 V Low level
10
Limited lamp
m
aximum current
DAC-BRIG 0 3.3 V *Note 1
Chapter 4-7