Datasheet

3A 220KHz 40V Buck LED Constant Current Driver

XL3001

Rev 1.2

www.xlsemi.com

11

Typical System Application (PWM DIMMING)

PWM dimming function can be used in typical system application with external components.

Changing the duty cycle of PWM signal can get different LED current. The PWM signal high

voltage above 3.3V(referenced to ground, lower than VIN), Low voltage below 0.2V(referenced

to ground).

XL3001

CIN

100uF/50V

COUT

220uF/35V

RCS

L1 100uH/3A

D1

B540C

C1

105

C2

105

4

5,6

7,8

1

VIN

3

IOUT=0.21V/RCS

VIN

VC

SW

GND

CS

CC

105

R1

2K

D2

1N4148

PWM

Figure18. XL3001 System Parameters Test Circuit (PWM DIMMING)

Typical System Application (LED OVP)

LED OVP function can be used in typical system application with external components. The

output voltage can be limited in a suitable value by choose different zener diode when the output

LED open. the zener diode voltage choosed by output led voltage's 1.3 times.

Figure19. XL3001 System Parameters Test Circuit (LED OVP)