MP3387A ― 6-STRINGS, MAX 80MA/STRING, STEP-UP, WHITE LED DRIVER

MP3387A Rev. 1.0

www.MonolithicPower.com

5

5/17/2017

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© 2017 MPS. All Rights Reserved.

ELECTRICAL CHARACTERISTICS

Parameters

Symbol

Condition

Min

Typ

Max

Units

Operating input voltage

3

26

V

Supply current (quiescent)

no load

1.6

mA

Supply current (shutdown)

1

μA

LDO output voltage

4.5

5

5.5

V

VCC UVLO threshold

Rising edge

2.4

2.55

2.7

V

VCC UVLO hysteresis

100

mV

EN on threshold

1.5

V

EN off threshold

0.6

V

Step-Up Converter

SW on resistance

0.18

0.3

Ω

SW leakage current

1

μA

Switching frequency

0.82

1.25

1.43

MHz

532

625

718

kHz

Maximum duty cycle

90

93

96

%

SW current limit

Duty = 90%

2

2.5

A

COMP transconductance

180

μA/V

COMP source current limit

1V < COMP < 2.9V

78

μA

COMP sink current limit

1V < COMP < 2.9V

28

μA

Current Dimming

PWMI input low threshold

0.4

V

PWMI input high threshold

1.5

V

MIX input low threshold

0.4

V

MIX input high threshold

1.5

V

PWMI

dimming

output

frequency

24

27.5

kHz

PWMI dimming input transfer

point

25

%

PWMI dimming transfer point

hysteresis

0.2

%

PWMI leakage current

10

15

μA

1

μA