Rainbow-electronics MAX17061 Manual do Utilizador descarregar pdf (Página 13)

MAX17061

8-String White LED Driver with

SMBus for LCD Panel Applications

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5V LINEAR

REGULATOR

OSCILLATOR

SLOPE

COMPENSATION

CLOCK

FB OVERVOLTAGE

COMPARATOR

ERROR

COMPARATOR

OUTPUT OVERVOLTAGE

COMPARATOR

LX1, 2

PGND1, 2

ERROR

AMPLIFIER

CURRENT SOURCE

FB1

GND

FB2

OV FAULT

CONTROL AND

DRIVER LOGIC

CURRENT SENSE

HVC

FB6

FB5

FB4

FB3

FB2

LVC

3-LEVEL

COMPARATOR

FB7

FB8

OSC

REF ADJ

REF

+ 0.6V

1.236V

ISET

PWMI

PWMO

MUX

0x03

"1"

"< = 1"

SCL

SMBus

INTERFACE

8-BIT D/A

VSAT

DPWM SIGNAL GENERATOR

DPWM

SETTING

WLED

ON/OFF

CURRENT SOURCE

SDA

FSET

CCV

FB3

CURRENT SOURCE

FB4

CURRENT SOURCE

FB5

CURRENT SOURCE

FB6

CURRENT SOURCE

FB7

CURRENT SOURCE

FB8

CURRENT SOURCE

10Ω

MAX17061

0x02 0x01 0x00

MUX

PWM_SEL

PWM_MD

DIMMING

BLOCK DIAGRAM

Figure 2. Control Circuit Block Diagram

1 2 ... 8 9 10 11 12 13 14 15 16 17 18 ... 25 26

MAX17061 1

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