MAX8790A(2007) データシートの表示（PDF） - Maxim Integrated

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MAX8790A
(Rev.:2007)

Six-String White LED Driver with Active Current Balancing for LCD Panel Applications

Maxim Integrated 

Six-String White LED Driver with Active

Current Balancing for LCD Panel Applications

ELECTRICAL CHARACTERISTICS

(Circuit of Figure 1. VIN = 12V, VSHDN = VIN, CCV = 0.1µF, TA = -40°C to +85°C, unless otherwise noted.) (Note 2)

PARAMETER

IN Input Voltage Range

IN Quiescent Current

VCC Output Voltage

VCC Short-Circuit Current

VCC UVLO Threshold

STEP-UP CONVERTER

EXT High Level

EXT Low Level

EXT On-Resistance

OSC High-Level Threshold

CONDITIONS

VIN = VCC

VCC bypassed to GND through 1μF cap

V = high

BRT = GND

VIN = 26V

VIN = VCC = 5V

= GND

V = 5V, 6V < VIN < 26V, 0 < IVCC < 10mA

Rising edge, hysteresis = 20mV

10mA from EXT to GND

-10mA from EXT to VCC

EXT high or low

MIN TYP MAX

4.5

5.5

5.5

26.0

2

2

10

4.7

5.3

12

130

4.00

4.45

VCC -

0.1

0.1

5

VCC -

0.4

OSC Midlevel Threshold

OSC Low-Level Threshold

Operating Frequency

Maximum Duty Cycle

VOSC = VCC

VOSC = open

VOSC = GND

CS Trip Voltage

Duty cycle = 75%

CONTROL INPUT

Logic-Input High Level

Logic-Input Low Level

BRT, ENA Logic-Input High

BRT, ENA Logic-Input Low Level

INPUT LEAKAGE

Leakage Current

= 26V

CS Leakage Current

OSC Leakage Current

VCS = GND

BRT, ENA Leakage Current

FSET, ISET Leakage Current

OV Leakage Current

FSET = ISET = VCC

1.5

VCC -

2.0

0.4

0.9

1.1

675

825

450

550

94

85

115

2.1

0.8

2.1

0.8

+42

+50

-3

+3

-1

+1

-1

+1

-0.1

+0.1

UNITS

V

mA

μA

V

mA

V

V

V

V

V

V

MHz

kHz

%

mV

V

V

V

V

μA

μA

μA

μA

μA

μA

4 _______________________________________________________________________________________

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