MAX8790 데이터 시트보기 (PDF) - Maxim Integrated

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MAX8790

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

Maxim Integrated 

MAX8790

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

VSHDN = high

VIN = 26V

VIN = VCC = 5V

SHDN = GND

VSHDN = 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

OSC Midlevel Threshold

OSC Low-Level Threshold

Operating Frequency

Maximum Duty Cycle

CS Trip Voltage

CONTROL INPUT

SHDN Logic-Input High Level

SHDN Logic-Input Low Level

BRT, ENA Logic-Input High Level

BRT, ENA Logic-Input Low Level

INPUT LEAKAGE

SHDN Leakage Current

CS Leakage Current

OSC Leakage Current

BRT, ENA Leakage Current

FSET, ISET Leakage Current

OV Leakage Current

VOSC = VCC

VOSC = open

VOSC = GND

Duty cycle = 75%

VSHDN = 26V

VCS = GND

FSET = ISET = VCC

MIN TYP MAX UNITS

4.5

5.5

V

5.5

26.0

2

mA

2

10

µA

4.7

5.3

V

12

130

mA

4.00

4.45

V

VCC -

0.1

VCC -

0.4

1.5

0.9

675

450

94

85

V

0.1

V

5

Ω

V

VCC

-2.0

V

0.4

V

1.1

MHz

825

kHz

550

%

115

mV

2.1

V

0.8

V

2.1

V

0.8

V

+35

µA

+50

µA

-3

+3

µA

-1

+1

µA

-1

+1

µA

-0.1

+0.1

µA

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