Electrical Characteristics

Parameter

Symbol

Conditions

Ta=25 C

Units

Min

Typ

Max

Input Voltage

VIN

7

32

V

Internal regulator start-up

threshold voltage

VSU

5.65

V

Quiescent supply current

with LX output off

IINQoff

55

90

A

65

130

Quiescent supply current

with LX output switching

IINQon

frequency of 250 kHz, ADJ pin floating

1.9

5.2

mA

Mean current sense

threshold voltage (1)

VSENSE

Measured on ISENSE pin with respect

to VIN, ADJ pin floating

95

100

105

mV

Sense threshold hysteresis VSENSEHYS

±15

%

Internal reference voltage

VREF

Measured on ADJ pin with pin floating 1.15

1.25

1.35

V

External control voltage

range on ADJ pin for dc

brightness control (2)

VADJ

0.3

2.0

V

LX switch On Resistance

RLX

1.3

3.5

Ohm

LX switch Output Current

ILX

1.25

A

LX switch Leakage Current ILX_Leakage

5

A

Note

(NOTE 1) VSENSE defines LED current setting accuracy

(NOTE 2) VADJ defines LED current. The LED light intensity will vary by varying the VADJ voltage from 0.3V to 2.0V. By applying VADJ < 0.2V, the

LED shall switch off.

FC1360

2009. 07. 10

3/7

Revision No : 0