4

FP6745-1.4-AUG-2013

FP6745

85T

fitipower integrated technology lnc.

Electrical Characteristics

Parameter

Symbol

Conditions

Min

Typ

Max

Unit

Operating Input Voltage

2.5

5.5

V

Operation Current

4

8

μA

430

550

μA

Switching Frequency

1.0

1.3

1.5

MHz

Maximum Duty Cycle

Duty

92

%

Under Voltage Lockout

VIN Under Voltage Lockout

UVLO

2.25

2.45

V

Under Voltage Lockout Hysteresis

92

mV

Open Lamp Shutdown Threshold

41

42

V

Enable

EN OFF Threshold

0.4

V

EN ON Threshold

0.6

V

Minimum EN Dimming Threshold

0.7

V

Maximum EN Dimming Threshold

1.4

V

Dimming On Time

1.5

μs

Feedback

FB Voltage

185

195

205

mV

FB Input Bias Current

-300

nA

Output Switch

SW ON-Resistance (Note 2)

0.5

Ω

SW Current Limit (Note 2)

1.33

A

Thermal Shutdown (Note 2)

150

°C

Note 2：The specification is guaranteed by design, not production tested.