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MAX16823_08 Datasheet, PDF (10/12 Pages) Maxim Integrated Products – High-Voltage, 3-Channel Linear High-Brightness LED Driver with Open LED Detection | |||
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High-Voltage, 3-Channel Linear High-Brightness
LED Driver with Open LED Detection
VIN
IN
CIN
OUT_
PWM DIMMING
MAX16823
DIM_
REG
C2
CS_
Q1
LEDs
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:
IPRESET
=
VREG â 0.7V
RPRELOAD
This circuit is used with older body controllers that
monitor minimum RCL current to detect failures.
RCS_
GND
Figure 5. Increased LED Current (Amper Range) with a Single
BJT
STOP
TAIL
RPRELOAD
CIN
100kâ¦
100kâ¦
CLGC
CREG
IN
OUT1
IN
OUT2
IN
OUT3
DIM1
DIM2 MAX16823
DIM3
CS1
LGC
CS2
REG
CS3
GND
TAIL
TAIL
STOP
RCS1
RCS2
RCS3
Figure 6. Preload Current Setting
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