MP3398D – 4-STRING, 350MA/STRING, STEP-UP, WHITE LED CONTROLLER

MP3398D Rev. 1.0

www.MonolithicPower.com

4

5/23/2016

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© 2016 MPS. All Rights Reserved.

ELECTRICAL CHARACTERISTICS

Parameters

Symbol

Condition

Min

Typ

Max

Units

Operating input voltage

5

28

V

Supply current (quiescent)

no load without switching

1.2

1.35

1.5

mA

Supply current (operation)

no load with switching

3

5.5

mA

Supply current (shutdown)

0.01

0.5

μA

LDO output voltage

5.4

6

6.6

V

VCC UVLO threshold

Rising edge

3.6

4

4.4

V

VCC UVLO hysteresis

200

mV

EN high voltage

1.4

V

EN low voltage

0.6

V

Step-Up Converter

Gate driver impedance

(sourcing)

4.5

7

Ω

Gate driver impedance (sinking)

2.5

5

Ω

Switching frequency

Ω

459

540

621

kHz

Ω

150

180

210

kHz

OSC voltage

1.20

1.23

1.26

V

Maximum duty cycle

Ω

90

93

%

Cycle-by-cycle ISENSE current

limit

Max duty cycle

175

220

265

mV

COMP source current limit

1V < COMP < 1.9V

70

μA

COMP sink current limit

1V < COMP < 1.9V

17

μA

COMP transconductance

∆I

μA

400

μA/V

Current Dimming

PWM input low threshold

0.6

V

PWM input high threshold

1.4

V

ADIM input low threshold

0.6

V

ADIM input high threshold

1.4

V