CM9330 Datasheet, PDF (5/10 Pages) California Micro Devices Corp – Asymmetrical High Efficiency Three Channel Boost LED Driver

PRELIMINARY
CM9330
Typical Performance Curves
ILED vs. VIN
21.2
21.0
20.8
20.6
ILED2
ILED1
20.4
20.2
20.0
19.8
19.6
ILED3
19.4
Interleave
L = 4.7uH
19.2
4 WLED/ch
TA = 25 ºC
19.0
2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0
V IN (V)
160
150
140
130
120
110
100
90
80
70
2.0
ILED vs. VIN (high current)
L=10uH, 3W+4W+4W, 60mA+40mA+40mA
L=10uH, 4W+4W+4W, 60mA+40mA+40mA
L=10uH, 4W+4W+4W, 40mA+40mA+40mA
L=4.7uH, 4W+4W+4W, 40mA+40mA+40mA
L=4.7uH, 4W+4W+4W, 35mA+30mA+30mA
No-Interleave
TA = 25 ºC
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.0
V IN (V)
EFFICIENCY v.s VIN
90
85
EFFICIENCY vs. ILED
90
Vin=5.6V
85
4.2V
3.6V
80
3.0V
2.7V
75
80
Interleave
ILED1,2,3 = 20mA
L = 4.7uH
4 WLED/ch
75
2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0
V IN (V)
70
65
60
0
L = 4.7uH
4 WLED/ch
TA = 25 ºC
5
10
15
20
25
30
35
ILED (m A)
EFFICIENCY vs. INDUCTOR
90
L=4.7uH
L=3.3uH
85
L=2.7uH
L=1.5uH
80
75
L=10uH
L=15uH
70
ILED1,2,3 = 20 mA
4 WLED/ch
TA = 25 ºC
65
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.0
VIN (V )
EFFICIENCY vs. STRING CONFIGURATION
90
88
ILED=20mA+20mA+20mA
86
84
IL E D = 5m A + 1 0 m A + 2 0 m A
82
IL E D = 20 m A + 1 0m A + 5 m A
80
78
Interleave
76
L = 4.7uH
CH1,2,3 = 4W+3W+2W
TA = 25 ºC
74
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.0
V IN (V)
© 2006 California Micro Devices Corp. All rights reserved.
04/26/06 490 N. McCarthy Blvd., Milpitas, CA 95035-5112 l Tel: [phone] l Fax: [phone] l www.cmd.com
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