MP3021 – 1X, 1.5X, 2X AUTO-ADJUST CHARGE PUMP WLED BACKLIGHT DRIVER

MP3021 Rev. 1.0

www.MonolithicPower.com

6

11/21/2007

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BLOCK DIAGRAM

Timer

Block

Enable

Logic

OverTemp

Det

UnderV

Det

Serial Data

Link

BG

ISET

Brightness

Control /

Iref Setting

Soft Start /

Ramp Controller

1.2 MHz Osc

Current

Sources

X4 (LED)

FAULT

LED0

LED1

LED2

LED3

VAR

Charge Pump

(Switches,

Control,

Crivers)

Control

Block

3-Bit SM

DATA

VIN

VSS

C1A

C1B

C2A

C2B

CP

Figure 1—Functional Block Diagram