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MAX16823_09 Datasheet(Arkusz danych) 10 Page - Maxim Integrated Products

Numer części MAX16823_09
Szczegółowy opis  High-Voltage, 3-Channel Linear High-Brightness LED Driver with Open LED Detection
Pobierz  12 Pages
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Producent  MAXIM [Maxim Integrated Products]
Strona internetowa  http://www.maxim-ic.com
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 10 page
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High-Voltage, 3-Channel Linear High-Brightness
LED Driver with Open LED Detection
10
______________________________________________________________________________________
Preload Current
Figure 6 shows the MAX16823 with a preload circuit. In
the circuit, the BJT, RPRELOAD, and REG generate a
preset load current. The preset load current IPRESET is
determined with the following formula:
This circuit is used with older body controllers that
monitor minimum RCL current to detect failures.
I
VV
R
PRESET
REG
PRELOAD
=
− 07
.
IN
DIM_
GND
RCS_
LEDs
Q1
CIN
VIN
OUT_
CS_
MAX16823
REG
C2
PWM DIMMING
Figure 5. Increased LED Current (Amper Range) with a Single
BJT
RCS1
RCS2
RCS3
OUT3
CS1
CS2
CS3
GND
DIM2
DIM1
STOP
TAIL
IN
IN
IN
CIN
RPRELOAD
CLGC
CREG
LGC
DIM3
REG
OUT2
OUT1
MAX16823
TAIL
TAIL
STOP
100k
Ω
100k
Ω
Figure 6. Preload Current Setting




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