MP4000 – OFFLINE HIGH BRIGHTNESS WLED DRIVER CONTROLLER

MP4000 Rev. 1.3

www.MonolithicPower.com

4

11/7/2012

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PIN FUNCTIONS

Pin #

Name

Description

1

DRIVE External MOSFET drive output.

2

CS

LED current sense input. Connect the current sense resistor that programs the LED

current .

3

BOS

Burst Oscillator Setting. For the DC input burst dimming, connect a capacitor from this pin to

GND to program the burst dimming frequency. For the external PWM input burst dimming,

connect a 300k resistor from this pin to GND and apply the logic signal to the DIM pin.

4

GND

Ground.

5

DIM

Burst Dimming Control Input. For DC input control, the voltage range of 0V to 2.4V at DIM

pin linearly sets the burst-mode duty cycle from minimum to 100%. For external PWM input

control, connect the PWM signal to DIM pin. Open DIM pin if no dimming control is applied.

6

NC

No connection. Float this pin.

7

VCC

The VCC voltage provides the power for IC logic and driving external MOSFET. Must be

locally bypassed.

8

TST

Test pin. Connect to GND.