Wide Brightness Range

CCFL Backlight Controllers

4

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ELECTRICAL CHARACTERISTICS (continued)

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNIT

ANALOG INTERFACE BRIGHTNESS CONTROL (MODE connected to REF or GND )

CRF/SDA, CRF Input Range

2.7

5.5

V

20

µA

CRF/SDA, CRF Input Current

-1

1

µA

CTL/SCL, Input Range

MAX1739

0

CRF/

SDA

V

CTL Input Range

MAX1839

0

CRF

V

CTL/SCL, CTL Input Current

MODE = REF or GND

-1

1

µA

ADC Resolution

Guaranteed monotonic

5

Bits

ADC Hysteresis

1

LSB

SH Input Low Voltage

0.8

V

SH Input High Voltage

2.1

V

SH/SUS Input Hysteresis when

Transitioning In and Out of Shutdown

150

mV

SH Input Bias Current

-1

1

µA

CRF/SDA, CTL/SCL, SH/SUS Input

0.8

V

CRF/SDA, CTL/SCL, SH/SUS Input

2.1

V

CRFSDA, CTLSCL Input Hysteresis

300

mV

CRF/SDA, CTL/SCL, SH/SUS Input

-1

1

µA

CRF/SDA Output Low Sink Current

4

mA

CTL/SCL Serial Clock High Period

4µs

CTL/SCL Serial Clock Low Period

4.7

µs

Start Condition Setup Time

4.7

µs

Start Condition Hold Time

4µs

CRF/SDA Valid to CTL/SCL Rising Edge

Setup Time, Slave Clocking in Data

250

ns

CTL/SCL Falling Edge to CRF/SDA

Transition

0ns

CTL/SCL Falling Edge to CRF/SDA

Valid, Reading Out Data

1µs