Rainbow-electronics MAX16803 Manual do Utilizador descarregar pdf (Página 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:

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

DIM

CS-

CS+

OUT

GND

TAIL

STOP

MAX16803

LEDs

Figure 6. Two Brightness Level with Current Level Switch for Tail/Stop Lights

DIM

CS-

CS+

OUT

GND

SENSE

LEDs

PWM DIMMING

MAX16803

Figure 7. Increased LED Current (Amper Range) with a Single BJT

1 2 3 4 5 6 7 8 9 10 11 12

MAX16803 1
PACKAGE OUTLINE 12

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