MAX16823 Maxim Integrated Products, MAX16823 Datasheet - Page 10

• Manufacturer Part Number: MAX16823
• Description: 3-Channel Linear High-Brightness LED Driver
• Manufacturer: Maxim Integrated Products

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High-Voltage, 3-Channel Linear High-Brightness
LED Driver with Open LED Detection
Figure 5. Increased LED Current (Amper Range) with a Single
BJT
Figure 6. Preload Current Setting
10
V
IN
PWM DIMMING
C
______________________________________________________________________________________
IN
STOP
TAIL
R
PRELOAD
IN
DIM_
MAX16823
GND
100kΩ
100kΩ
OUT_
CS_
REG
C
LGC
C
IN
C2
C
REG
R
CS_
Q1
LEDs
IN
IN
IN
DIM1
DIM2
DIM3
LGC
REG
MAX16823
Figure 6 shows the MAX16823 with a preload circuit. In
the circuit, the BJT, R
preset load current. The preset load current I
determined with the following formula:
This circuit is used with older body controllers that
monitor minimum RCL current to detect failures.
GND
OUT1
OUT2
OUT3
CS1
CS2
CS3
I
PRESET
TAIL
R
PRELOAD
=
CS1
V
R
REG
PRELOAD
TAIL
− 0 7 .
R
, and REG generate a
CS2
Preload Current
V
STOP
R
CS3
PRESET
is