Rainbow Electronics MAX16803 - Manual (Page 9)

Other Applications
The application circuit in Figure 6 implements a two-
level brightness current for TAIL/STOP lights. In TAIL
operation, Q1 is off and the R1 sets the output current.
In STOP operation, Q1 turns on and the output current
is set by a parallel combination of R1 and R2.
Figure 7 shows an application circuit with the
MAX16803 using a single BJT to provide high output
current. For proper operation:
V IN(MIN) > V CESAT(MAX) + V FT(MAX) + V RSENSE
where V CESAT(MAX) is the maximum saturation voltage
of the external BJT.
MAX16803
High-Voltage, 350mA, High-Brightness LED
Driver with PWM Dimming and 5V Regulator
_______________________________________________________________________________________ 9
IN
EN
V5
DIM
CS-
CS+
OUT
GND
R2
C1
TAIL
STOP
V5
R1
MAX16803 C2
LEDs
Q1
Figure 6. Two Brightness Level with Current Level Switch for Tail/Stop Lights
IN
EN
DIM
CS-
CS+
OUT
GND
R SENSE
LEDs
Q1
C1
V IN
V5
PWM DIMMING
MAX16803
C2
Figure 7. Increased LED Current (Amper Range) with a Single BJT