LM1938SF6 datasheet(4/6 Pages) HTC

Part #	LM1938SF6

Description	White LED Step-Up Converter

Download	6 Pages

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Manufacturer	HTC [HTC Korea TAEJIN Technology Co.]

Direct Link	http://www.htckorea.co.kr

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4 / 6 page

White LED Step-Up Converter

LM1938

Aug. 2011 – Pre

- 4

-

HTC

ELECTRICAL CHARACTERISTICS

TA = 25°C, VIN = 5V, VSHDN = 5V, unless otherwise noted.

PARAMETER

SYMBOL

TEST CONDITION

MIN.

TYP.

MAX.

UNIT

Minimum Operating Voltage

VINMIN

2.5

V

Maximum Operating Voltage

VINMAX

10

V

Feedback Voltage

VFB

ILOAD = 180mA, VIN=5V

86

95

104

mV

FB Pin Bias Current

10

45

100

nA

Supply Current

/SHDN = 0V

2.1

0.1

3.0

1.0

mA

uA

Switching Frequency

1.1

1.3

1.6

MHz

Maximum Duty Cycle

85

90

%

Switch Current Limit

650

mA

Switch VCESAT

ISW = 250mA

350

mV

Switch Leakage Current

VSW = 5V

0.01

5

uA

SHDN Voltage High

1.5

V

SHDN Voltage Low

0.4

V

SHDN Pin Bias Current

65

uA

OVP Threshhold

29

V

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LM1938SF6 Datasheet(PDF) 4 Page - HTC Korea TAEJIN Technology Co.

LM1938SF6 Datasheet(HTML) 4 Page - HTC Korea TAEJIN Technology Co.

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