MP3399-12-STRING, CASCADING WHITE LED DRIVER WITH STEP-UP CONTROLLER

MP3399 Rev. 1.0

www.MonolithicPower.com

4

3/27/2013

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

4.5

28

V

Supply Current (Quiescent)

switching

4

mA

Supply Current (Shutdown)

2

μA

LDO Output Voltage

5.5

6

6.5

V

Input UVLO Threshold

Rising Edge

3.4

3.9

4.3

V

Input UVLO Hysteresis

200

mV

EN High Voltage

1.8

V

EN Low Voltage

0.6

V

STEP-UP CONVERTER

Gate Driver Impedance

(Sourcing)

4

Ω

Gate Driver Impedance

(Sinking)

2

Ω

GATE Voltage

6

V

510

570

630

kHz

Switching Frequency

150

170

190

kHz

OSC Voltage

1.18

1.23

1.28

V

Minimum On Time

PWM Mode,

when no pulse skipping happens

100

ns

Maximum Duty Cycle

90

%

ISENSE Limit

Max Duty Cycle

175

220

265

mV

COMP Source Current Limit

65

μA

COMP Sink Current Limit

15

μA

PWM DIMMING

DBRT Leakage Current

-5

5

μA

BOSC Frequency

1.2

1.6

2

kHz

BOSC Output Current

6.37

7.5

8.63

uA

LED CURRENT REGULATION

ISET Voltage

1.20

1.22

1.245

V

LEDX Average Current

29.6

30.5

31.4

mA

Current Matching

(5)

2.5

%