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High-Voltage, 100mA/200mA Adjustable Linear
High-Brightness LED Drivers with PWM Dimming
STOP
D1
LEDs
TAIL
IN
OUT
C1
MAX16815
MAX16828
DIM
V5
CS+
C2
LEDs
R3
V IN
C1
PWM
DIMMING
IN
MAX16815
MAX16828
OUT
V5
C2
Q1
GND
R1
Q1
R2
DIM
GND
CS+
R SENSE
CS-
Z1
CS-
Figure 3. Two-Level Brightness with Current Level Switch for
TAIL/STOP Lights
Figure 4. Increased LED Current (Ampere Range)
with a Single BJT
C REF
V IN
L1
D1
REF
V CC
C3
IN
OUT
IN
OUT
IN
OUT
C2
C COMP
MAX5094C
R3
U2
LEDs
U4
LEDs
U3
LEDs
COMP
OUT
Q1
C4
EN
MAX16815
V5
EN
MAX16815
V5
EN
MAX16815
V5
R COMP
MAX16828
C7
MAX16828
C11
MAX16828
C9
C6
C10
C8
FB
GND
DIM
CS+
DIM
CS+
DIM
CS+
R5
R7
R6
C T /R T
CS
R4
GND
CS-
GND
CS-
GND
CS-
CT
R2
Figure 5. Multichannel HB LED Drivers for LCD Backlight
Multichannel HB LED Driver
Figure 5 shows an array of MAX16815/MAX16828s with
independent DIM control. The MAX5094C, a current-
mode PWM controller, provides the input power to each
LED driver preregulated voltage to multiple MAX16815/
MAX16828 drivers.
PROCESS: BiCMOS
Chip Information
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9
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