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MAX8790AETP

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

Maxim Integrated 

MAX8790A

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

CONDITIONS

MIN TYP MAX

IN Input Voltage Range

IN Quiescent Current

VIN = VCC

VCC bypassed to GND through 1µF cap

VSHDN = high

BRT = GND

VIN = 26V

VIN = VCC = 5V

SHDN = GND

4.5

5.5

5.5

26.0

2

2

10

VCC Output Voltage

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

4.7

5.3

VCC Short-Circuit Current

12

130

VCC UVLO Threshold

Rising edge, hysteresis = 20mV

4.00

4.45

STEP-UP CONVERTER

EXT High Level

10mA from EXT to GND

VCC -

0.1

EXT Low Level

-10mA from EXT to VCC

0.1

EXT On-Resistance

EXT high or low

5

OSC High-Level Threshold

VCC -

0.4

OSC Midlevel Threshold

1.5

VCC

-2.0

OSC Low-Level Threshold

0.4

Operating Frequency

Maximum Duty Cycle

VOSC = VCC

VOSC = open

VOSC = GND

0.9

1.1

675

825

450

550

94

CS Trip Voltage

Duty cycle = 75%

85

115

CONTROL INPUT

SHDN Logic-Input High Level

2.1

SHDN Logic-Input Low Level

0.8

BRT, ENA Logic-Input High Level

2.1

BRT, ENA Logic-Input Low Level

0.8

INPUT LEAKAGE

SHDN Leakage Current

SHDN = 26V

+42

CS Leakage Current

OSC Leakage Current

VCS = GND

+50

-3

+3

BRT, ENA Leakage Current

-1

+1

FSET, ISET Leakage Current

OV Leakage Current

FSET = ISET = VCC

-1

+1

-0.1

+0.1

UNITS

V

mA

µA

V

mA

V

V

V

Ω

V

V

V

MHz

kHz

%

mV

V

V

V

V

µA

µA

µA

µA

µA

µA

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