65PWB31

DATA SHEET DOD-PD-0734 (2nd edition)

5

2.3 ELECTRICAL CHARACTERISTICS

(Ta=25

°C)

Parameter

Symbol

min.

typ.

max.

Unit

Remarks

Power supply voltage

VDDB

4.75

5.0

5.25

V

Note1, Note2

Power supply current

IDDB

-

900

1,000

mA

VDDB = 5.0V Note2

(at the maximum

luminance control)

Open lamp voltage

VO

900

-

-

Vrms

Ta = - 10 to + 65

°C

Output voltage

Lamp voltage

(at steady state)

VBLH

-

375

-

Vrms

-

Output current

Lamp current

(per lamp)

IBL

-

5.0

-

mArms

-

Oscillation frequency

FO

51

55

59

kHz

Luminance control frequency

FB

250

270

290

Hz

-

Note1: When designing of the power supply, take the measures for the prevention of surge voltage.

Note2: The power supply lines (VDDB and GNDB) occurs large ripple voltage while luminance control

of LCD lamps. There is the possibility that the ripple voltage produces acoustic noise and signal

wave noise in audio circuit and so on. Put a capacitor (5,000 to 6,000

source lines (VDDB and GNDB) to reduce the noise, if the noise occurred in the circuit.

2.4 FUSE

Fuse

Parameter

Type

Supplier

Rating

Fusing current

Remarks

2.0A

VDDB

11CT2A

SOC Corporation

72V

4.0A

Note1

Note1: The power supply capacity should be more than the fusing current. If the power capacity is less

than the fusing current, the fuse may not blow for a short time, and then nasty smell, smoking and

so on may occur.