MAX8709B datasheet(6/24 Pages) MAXIM

Part #	MAX8709B

Description	High-Efficiency CCFL Backlight Controller with SMBus Interface

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Manufacturer	MAXIM [Maxim Integrated Products]

Direct Link	https://www.maximintegrated.com/en.html

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6 / 24 page

LAMP-OUT VOLTAGE

LIMITING AND TIMEOUT

MAX8709 toc09

A: VVFB, 1V/div

B: VIFB, 1V/div

0V

A

B

200ms/div

High-Efficiency CCFL Backlight

Controller with SMBus Interface

6

_______________________________________________________________________________________

Typical Operating Characteristics (continued)

(Circuit of Figure 1. VBATT = 12V, VLOT = VREF, VCC = VDD, VSUS = 5.3V, TA = +25°C, unless otherwise noted.)

STARTUP

MAX8709 toc04

A: VSUS, 5V/div

B: VIFB, 2V/div

C: VVFB, 2V/div

D: VLX1, 10V/div

2ms/div

0V

A

B

C

D

0V

DPWM OPERATION (10%)

MAX8709 toc05

A: VCCV, 200mV/div

B: VIFB, 1V/div

C: VVFB, 1V/div

1ms/div

0V

1.2V

A

B

C

DPWM OPERATION (50%)

MAX8709 toc06

A: VCCV, 200mV/div

B: VIFB, 1V/div

C: VVFB, 1V/div

1ms/div

0V

1.2V

A

B

C

DPWM SOFT-START

MAX8709 toc07

A: VIFB, 1V/div

B: VVFB, 1V/div

40

μs/div

0V

1.2V

A

B

CCI

CCV

DPWM SOFT-STOP

MAX8709 toc08

A: VIFB, 1V/div

B: VVFB, 1V/div

40

μs/div

0V

A

B

CCI

CCV

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MAX8709B Datasheet(PDF) 6 Page - Maxim Integrated Products

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