MP3391—8-CHANNEL, 120mA/CH STEP-UP WLED DRIVER CONTROLLER

MP3391 Rev. 1.11

www.MonolithicPower.com

4

3/14/2013

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

© 2013 MPS. All Rights Reserved.

ELECTRICAL CHARACTERISTICS

Parameters

Symbol

Condition

Min

Typ

Max

Units

Operating Input Voltage

9

35

V

Supply Current (Quiescent)

3.5

mA

Supply Current (Shutdown)

2

μA

VCC Output Voltage

4.5

5

5.5

V

VCC UVLO Threshold

Rising Edge

3.4

3.9

4.3

V

VCC UVLO Hysteresis

200

mV

VDD Output Voltage

9

10

11

V

VDD UVLO Threshold

Rising Edge

6.8

7.3

7.8

V

VDD UVLO Hysteresis

500

mV

EN High Voltage

1.6

V

EN Low Voltage

0.8

V

NUMSEL High Threshold

Rising, 6 strings

3

V

NUMSEL Low Threshold

Falling, 4 strings

0.8

V

STEP-UP CONVERTER

Gate

Driver

Impedance

(Sourcing)

4.5

Ω

Gate

Driver

Impedance

(Sinking)

1.5

Ω

Gate

Maximum

Source

Current

0.4

A

Gate Maximum Sink Current

1

A

Switching Frequency

235

280

325

kHz

OSC Voltage

1.20

1.23

1.26

V

Minimum On Time

PWM Mode,

when no pulse skipping happens

200

ns

Maximum Duty Cycle

90

%

ISENSE Limit

90% Duty Cycle

175

230

285

mV

COMP Source Current Limit

200

μA

COMP Sink Current Limit

50

μA

PWM DIMMING

DBRT Leakage Current

-5

+5

μA

BOSC Frequency

1.2

1.6

2

kHz

BOSC Output Current

5.7

7.0

7.9

μA