High-Efficiency, Wide Brightness

Range, CCFL Backlight Controllers

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5

ELECTRICAL CHARACTERISTICS (continued)

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

5.0

5.5

V

SH/SUS = GND, no load

3.5

5.5

V

4.5

4.0

V

Rising edge

0.9

2.7

V

REF Output Voltage, Normal Operation

1.96

2.04

V

GH1, GH2, GL1, GL2 On-Resistance

10

Ω

Maximum Current-Limit Threshold

LX1-GND, LX2-GND (Fixed)

180

220

mV

80

120

Maximum Current-Limit Threshold

LX1-GND, LX2-GND (Adjustable)

360

440

mV

IFB Input Voltage Range

0

1.7

V

IFB Regulation Point

335

440

mV

IFB Input Bias Current

-1

+1

µA

IFB Lamp-Out Threshold

120

180

mV

VFB Input Voltage Range

-2

+2

V

VFB Input Bias Current

VFB = 0

-0.1

+0.1

µA

VFB Regulation Point

480

540

mV

VFB Zero-Voltage Crossing Threshold

-20

+20

mV

SHVSUS Input Low Voltage

0.8

V

SHVSUS Input High Voltage

2.1

V

SDA, SCL Input Low Voltage

0.8

V

SDA, SCL Input High Voltage

2.1

V

SDA Output Low Sink Current

4

mA

Note 1: Specifications to -40°C are guaranteed by design based on final test characterization results.

Note 2: Corresponds to 512 DPWM cycles or 65536 MODE cycles.

ates between SMB mode and ADC mode. When in shutdown and with ADC mode selected the CRF/SDA and CTL/SCL pins

Note 4: The amplitude is measured with the following circuit:

MODE

500pF

10k

Ω