MP3398D – 4-STRING, 350MA/STRING, STEP-UP, WHITE LED CONTROLLER

MP3398D Rev. 1.0

www.MonolithicPower.com

5

5/23/2016

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Parameters

Symbol

Condition

Min

Typ

Max

Units

LED Current Regulation

ISET voltage

1.22

1.24

1.26

V

LEDX average current

kΩ

31.9

32.9

33.9

mA

Ω,

5.3

5.7

6.2

mA

Current matching

(5)

kΩ,

2.5

%

Ω

2.5

%

VCC max current limit

50

75

100

mA

LED MOSFET resistance

1.7

Ω

LEDX regulation voltage

800

mV

285

mV

Protection

OVP threshold

Rising edge

1.20

1.23

1.26

V

OVP threshold hysteresis

Hysteresis

80

mV

OVP UVLO threshold

Step-up converter fails

30

75

120

mV

LEDX UVLO threshold

120

200

280

mV

LEDX over-voltage threshold

5.8

6.3

6.8

V

LED short fault cycles

4096

Latch-off current limit

560

640

720

mV

Thermal protection threshold

(6)

150

°C

Thermal protection hysteresis

25

°C

NOTE:

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

6) Guarantee by design.