Acer AL501 Handbuch - Seite 17

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7. VP-531 POWER BOARD

A. Description

The VP-531 power board is designed for lighting up the back-lights of LCD module.

B. Electrical characteristics

B-1 FOR HANNSTAR PANEL

INPUT VOLTAGE

INPUT CURRENT

NO LOAD BACKLIGHT

VOLTAGE

LAMP CURRENT

DRIVING FREQUENCY

EFFICIENCY

Operating Life Time

Note:

Life time(Hr) can be defined as the time in which it continues to operate under the

condition:

Ta=25 3 C, I

1. When the brightness becomes 50%

2. When the startup voltage (Vs) at 0 C becomes higher than the maximal value of

Vs specified above

B-2 DC/DC power

B.2.1 Input

12V

B.2.2 Output

Item

Output voltage

Vcc

B.2.3 Efficiency:78% typ. at maximum load.

MIN.

11.4V

--------

3mA rms.

40KHz

--------

50,000

=6.0Ma(ms) and f

=30 KHz until one of the following event occurs:

max. load Min. load tolerence

1.2A

0.1A

TYP.

MAX.

12V

12.6V

0.85A

640V rms.

--------

6mA rms.

7mArms

55KHz

70KHz

75%

--------

-------

--------

ripple & noise(max.)

150Vpp

COMMENT

Vin=12V MAX.

BRIGHTNESS

Vin = 12V

Hours (noto)