MP3388- 50V, 8-STRING WHITE LED DRIVERS

MP3388 Rev. 1.0

www.MonolithicPower.com

3

12/16/2011

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© 2011 MPS. All Rights Reserved.

ELECTRICAL CHARACTERISTICS

Parameters

Symbol

Condition

Min

Typ

Max

Units

Operating Input Voltage

4.5

25

V

Supply Current (Quiescent)

1.8

mA

Supply Current (Shutdown)

2

μA

LDO Output Voltage

4.5

5

5.5

V

Input UVLO Threshold

Rising Edge

3.4

3.9

4.3

V

Input UVLO Hysteresis

200

mV

EN ON Threshold

1.8

V

EN OFF Threshold

0.6

V

STEP-UP CONVERTER

SW On-Resistance

0.18

0.3

Ω

SW Leakage Current

1

μA

1.0

1.25

1.5

MHz

Switching Frequency

500

625

750

kHz

OSC High-Level Threshold

2.1

V

OSC Low-Level Threshold

0.8

V

Minimum On Time

PWM Mode,

when no pulse skipping happens

100

ns

Maximum Duty Cycle

90

93

96

%

SW Current Limit

Duty=90%

2.0

A

COMP Transconductance

100

μA/V

COMP Output Current

60

uA

PWM DIMMING

PWMI High-Level Threshold

1.5

V

PWMI Low-Level Threshold

0.8

V

PWMO Output Impedance

300

400

500

kΩ

PWMI Leakage Current

-1

+1

μA

DPWM Frequency

1.2

1.6

2

kHz