ame5142c AME, Inc., ame5142c Datasheet - Page 14

• Manufacturer Part Number: ame5142c
• Description: High Efficiency 6 White Led Driver With Open Led Protection
• Manufacturer: AME, Inc.

14
AME5142C
voltage source in dimming control. The circuit is shown in Figure 7.
B. Using a Filtered PWM Signal
The filtered PWM signal can be considered as an adjustable DC voltage. It can be used to replace the variable DC
150
125
100
75
50
25
0
0
AME
0.2
V
FB
VS Duty Cycle
Duty Cycle
0.4
Figure 7. Dimming Control Using a Filtered PWM Signal
0.6
1 F
V
C
IN
IN
2.8V to 5.5V
0.8
1
IN
EN
GND
AME5142C
22 H
High Efficiency 6 White LED Driver
L1
2.8V
0V
OVP
SW
FB
PWM Signal
20
15
10
5
0
20KHZ
0
With Open LED Protection
10K
91K
R
R4
5.1K
DC
R3
0.2
I
OUT
C
1 F
DC
VS Duty Cycle
Duty Cycle
0.4
5.1
R2
V
0.6
OUT
0.22 F
C
OUT
0.8
Rev. B.01
1