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MAX8790 Datasheet(PDF) 7 Page - Maxim Integrated Products

Part # MAX8790
Description  Six-String White LED Driver with Active Current Balancing for LCD Panel Applications
PDF  24 Pages
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Manufacturer  MAXIM [Maxim Integrated Products]
Direct Link  https://www.maximintegrated.com/en.html
Logo MAXIM - Maxim Integrated Products

MAX8790 Datasheet(HTML) 7 Page - Maxim Integrated Products

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Six-String White LED Driver with Active
Current Balancing for LCD Panel Applications
_______________________________________________________________________________________
7
SWITCHING WAVEFORMS
(BRT = 15%, ANALOG DIMMING)
MAX8790 toc10
1
μs/div
IL
500mA/div
0mA
VLX
10V/div
0V
STARTUP WAVEFORMS
(BRT = 100%, DPWM DIMMING)
4ms/div
0A
SHDN
5V/div
VOUT
20V/div
VCCV
2V/div
IL
1A/div
0V
0V
0V
MAX8790 toc11
LED CURRENT WAVEFORMS
(BRT = 50% AT 200Hz, DPWM DIMMING)
2ms/div
0A
BRT
5V/div
VFB1
5V/div
ILED
100mA/div
IL
1A/div
0mA
0V
0V
MAX8790 toc12
LED CURRENT WAVEFORMS
(BRT = 1% AT 200Hz, DPWM DIMMING)
1ms/div
0A
BRT
5V/div
VFB1
5V/div
ILED
100mA/div
IL
1A/div
0mA
0V
0V
MAX8790 toc13
LED CURRENT WAVEFORMS
(BRT = 50% AT 200Hz, ANALOG DIMMING)
1ms/div
0A
BRT
5V/div
VFB1
1V/div
ILED
50mA/div
IL
1A/div
0mA
0V
0V
MAX8790 toc14
LED CURRENT WAVEFORMS
(BRT = 1% AT 200Hz, ANALOG DIMMING)
1ms/div
0mA
BRT
5V/div
VFB1
2V/div
ILED
50mA/div
IL
500mA/div
0mA
0V
0V
MAX8790 toc15
LED-OPEN FAULT PROTECTION
(BRT = 100%, LED OPEN ON FB3)
20ms/div
0A
VFB3
1V/div
VFB1
10V/div
VOUT
20V/div
IL
1A/div
0V
0V
0V
MAX8790 toc16
Typical Operating Characteristics (continued)
(Circuit configuration 1, VIN = 12V, VSHDN = VIN, LEDs = 8 series x 6 parallel strings, ISET = VCC, TA = +25°C, unless otherwise noted.)



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