MP3397ES datasheet(4/16 Pages) MPS

Part #	MP3397ES

Description	Step-Up, 4-String Max 350mA/String White LED Driver

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Manufacturer	MPS [Monolithic Power Systems]

Direct Link	http://www.monolithicpower.com

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MP3397—4-STRING, MAX 350mA/STRING WHITE LED DRIVER

MP3397 Rev. 1.01

www.MonolithicPower.com

4

9/4/2012

MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.

ELECTRICAL CHARACTERISTICS

VIN =12V, VEN = 5V, TA = 25°C, unless otherwise noted.

Parameters

Symbol

Condition

Min

Typ

Max

Units

Operating Input Voltage

VIN

5

28

V

Supply Current (Quiescent)

IQ

VIN=12V, VEN=5V, no load with

switching

4

mA

Supply Current (Shutdown)

IST

VEN=0V, VIN=12V

2

μA

LDO Output Voltage

VCC

VEN=5V,

7V<VIN<28V,

0<IVCC<10mA

5.5

6

6.5

V

Input UVLO Threshold

VIN_UVLO

Rising Edge

3.8

4.2

4.6

V

Input UVLO Hysteresis

200

mV

EN High Voltage

VEN_HIGH

VEN Rising

1.8

V

EN Low Voltage

VEN_LOW

VEN Falling

0.6

V

STEP-UP CONVERTER

Gate Driver Impedance

(Sourcing)

VCC=6V,VGATE=6V

4

Ω

Gate Driver Impedance

(Sinking)

VCC=6V,IGATE=10mA

2

Ω

Switching Frequency

fSW

ROSC= 115kΩ

480

540

600

kHz

ROSC= 374kΩ

145

165

185

kHz

OSC Voltage

VOSC

1.20

1.23

1.26

V

Minimum On Time

tON_MIN

PWM Mode,

when no pulse skipping happens

100

ns

Maximum Duty Cycle

DMAX

90

%

ISENSE Limit

Max Duty Cycle

150

200

250

mV

COMP Source Current Limit

ICOMP SOLI

65

μA

COMP Sink Current Limit

ICOMP SILI

15

μA

PWM DIMMING

DBRT Leakage Current

IDBRT_LK

-5

5

μA

BOSC Frequency

fBOSC

CBOSC=2.2nF

1.0

1.5

2

kHz

BOSC Output Current

IBOSC

6

7.5

9

μA

LED CURRENT REGULATION

ISET Voltage

VISET

1.20

1.23

1.25

V

LEDX Average Current

ILED

RISET=30kΩ

31

32

33

mA

Current Matching

(5)

ILED=32mA

2.5

%

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