MAX8709B Просмотр технического описания (PDF) - Maxim Integrated

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MAX8709B

High-Efficiency CCFL Backlight Controller with SMBus Interface

Maxim Integrated 

High-Efficiency CCFL Backlight

Controller with SMBus Interface

ELECTRICAL CHARACTERISTICS (continued)

(Circuit of Figure 1. VBATT = 12V, VLOT = VREF, VCC = VDD, VSUS = 5.3V, TA = -40°C to +85°C. Typical values are at TA = +25°C,

unless otherwise noted.) (Note 2)

PARAMETER

Lamp-Out Detection Timeout Timer

SDA, SCL, SUS Input Low Voltage

SDA, SCL, SUS Input High Voltage

SDA, SCL, SUS Input Bias Current

SDA Output Low Sink Current

SCL Serial Clock High Period

SCL Serial Clock Low Period

START Condition Setup Time

START Condition Hold Time

SDA Valid to SCL Rising-Edge Setup Time,

Slave Clocking-In Data

CONDITIONS

VIFB < 0.1V (Note 1)

VSDA = 0.4V

THIGH

TLOW

tSU:STA

tHD:STA

tSU:DAT

MIN TYP MAX UNITS

1.14

1.30

s

0.8

V

2.1

V

-1

+1

µA

4

mA

4

µs

4.7

µs

4.7

µs

4

µs

250

ns

SCL Falling Edge to SDA Transition

tHD:DAT

0

ns

Note 1: Corresponds to 256 DPWM cycles.

Note 2: Specifications to -40°C are guaranteed by design based on final characterization results.

Typical Operating Characteristics

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

LOW INPUT-VOLTAGE

OPERATION (VBATT = 8V)

MAX8709 toc01

0V A

0V B

HIGH INPUT-VOLTAGE

OPERATION (VBATT = 20V)

MAX8709 toc02

0V A

0V B

LINE-TRANSIENT RESPONSE

MAX8709 toc03

A

8V

0V B

A: VIFB, 2V/div

B: VVFB, 2V/div

C: VLX1, 10V/div

D: VLX2, 10V/div

10μs/div

C

0V

D

0V

A: VIFB, 2V/div

B: VVFB, 2V/div

C: VLX1, 10V/div

D: VLX2, 10V/div

10μs/div

C

0V

D

0V

A: VBATT, 5V/div

B: VIFB, 2V/div

C: VVFB, 2V/div

D: VLX1, 10V/div

40μs/div

0V C

D

0V

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