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

MP3391 Rev. 1.11

www.MonolithicPower.com

5

3/14/2013

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Parameters

Symbol

Condition

Min

Typ

Max

Units

LED CURRENT REGULATION

ISET Voltage

1.21

1.23

1.25

V

LEDX Average Current

58.9

60.4

61.9

mA

Current Matching (5)

ILED=60.4mA

2.5

%

LEDX Regulation Voltage

VLEDX

ILED=60.4mA

450

mV

PROTECTION

OVP Over Voltage Threshold

Rising Edge

1.20

1.24

1.28

V

OVP UVLO threshold

Step-up Converter Fails

50

80

110

mV

LEDX UVLO Threshold

140

190

240

mV

SSET Voltage Gain

Short LED Voltage Threshold

4.2

4.5

4.8

TSET Source Current

40

50

60

μA

TSET Fault Threshold

1.20

1.24

1.28

V

Thermal Shutdown Threshold

150

℃

FF Pull Down Resistance

100

Ω

VFAULT Pull Down Current

IFAULT

40

55

70

μA

VFAULT Blocking-Off Voltage

(with Respect to VIN)

VFAULT

VIN =18V, VIN-VFAULT

6

V

Notes:

5) Matching is defined as the difference of the maximum to minimum current divided by 2 times average currents.