MP3393—8-STRING WHITE LED DRIVER WITH STEP-UP CONTROLLER

MP3393 Rev. 1.05

www.MonolithicPower.com

10

3/26/2013

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FUNCTIONAL BLOCK DIAGRAM

Control

Logic

+

-

Current Sense

Amplifier

+

-

PWM

Comparator

Oscillator

+

-

1.23V

OV

Comparator

+

-

+

-

CTL1

Feedback

CTL1 Control

6.4V

EA

LED OV

Comparator

Short String

Protection

Regulator

OVP

ISENSE

GND

VIN

VCC

DIM

COMP

OSC

EN

Enable

Control

320mV

GATE

GND

Current Control

And

Fault Protection

FF

Fault

Management

VFAULT

FB1

CTL8

FB8

Figure 1: MP3393 Functional Block Diagram