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W-52 Scheda tecnica(PDF) 9 Page - Copal Electronics

Il numero della parte W-52
Spiegazioni elettronici  CMOS White LED Driver
Download  11 Pages
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Produttore elettronici  COPAL [Copal Electronics]
Homepage  http://www.nidec-copal-electronics.com/e
Logo COPAL - Copal Electronics

W-52 Scheda tecnica(HTML) 9 Page - Copal Electronics

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W-52
9
TYPICAL APPLICATION CIRCUITS
(The application diagrams below are shown for the TSOT 23 packages.)
Figure 16. Two LEDs with DC Level Dimming Control
2.5 V DC
DIMMING
CONTROL
15 mA
4
1.50 k
60.40 k
6.8 H
2
3
1
6
5
SW
VIN
RSET
D1
C2
2.2 F
C1
4.7 F
VIN
W-52
LED
GND
2.5 V DC
DIMMING
CONTROL
15 mA
4
1.50 k
60.40 k
6.8 H
2
3
1
6
5
SW
VIN
RSET
D1
C2
1 F
C1
4.7 F
VIN
W-52
LED
GND
Figure 17. Three LEDs with DC Level Dimming Control
15 mA
4
1.50 k
6.8 H
2
3
1
6
5
SW
VIN
RSET
D1
C2
1 F
C1
4.7 F
VIN
PWM
DIMMING
CONTROL
W-52
LED
GND
Figure 18. Efficiency
Three LEDs
LED CURRENT (mA)
20
15
10
5
0
60
65
70
75
80
85
LED CURRENT (mA)
Figure 19. Four LEDs with PWM Dimming Control
Figure 20. Efficiency
Four LEDs
SHDN
L1
RSET
VIN = 4.2 V
VIN = 3.0 V
20
15
10
5
0
60
65
70
75
80
85
VIN = 4.2 V
VIN = 3.0 V
L1
SHDN
RSET
SHDN
RSET
L1


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