MP3384L – 50V, 4-STRING, WHITE LED DRIVER

MP3384L Rev. 1.0

www.MonolithicPower.com

3

12/27/2013

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© 2013 MPS. All Rights Reserved.

ELECTRICAL CHARACTERISTICS

Parameters

Symbol

Condition

Min

Typ

Max

Units

Operating Input Voltage

3

25

V

Supply Current (Quiescent)

1.8

mA

Supply Current (Shutdown)

2

μA

LDO Output Voltage

4.5

5

5.5

V

VCC High Threshold

3

V

VCC Low Threshold

2.2

V

EN ON Threshold

1.8

V

EN OFF Threshold

0.6

V

STEP-UP CONVERTER

SW On-Resistance

0.5

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 without Pulse Skipping

100

ns

Maximum Duty Cycle

90

93

96

%

SW Current Limit

Duty=90%

1.2

A

COMP Transconductance

100

μA/V

COMP Output Current

60

μA

PWM DIMMING

PWM High-Level Threshold

1.5

V

PWM Low-Level Threshold

0.6

V

LED CURRENT REGULATION

LEDx Average Current

19.4

20

20.6

mA

Current Matching

(5)

2.5

%

Maximum LED Current per

String

30

mA

LEDx Regulation Voltage

600

mV

PROTECTION

OVP Over Voltage Threshold

Rising Edge

1.17

1.23

1.3

V

OVP UVLO Threshold

Step-Up-Converter Failure

48

70

102

mV

LEDx Over Voltage Threshold

5.1

5.5

5.9

V

LEDx UVLO Threshold

135

180

235

mV

Thermal Shutdown Threshold

150

°C

LEDx Over-Voltage Fault

Timer

1.3

1.6

1.9

ms

Notes:

5) Matching is defined as the difference between the maximum and minimum current divided by 2×average current