CM9321 Datasheet, PDF (5/11 Pages) California Micro Devices Corp – Asymmetrical High Efficiency Three Channel Boost LED/OLED Driver

PRELIMINARY
CM9321
Typical Performance Curves
ILED vs. VIN
21.2
21.0
ILED1
20.8
20.6
20.4
20.2
20.0
19.8
19.6
ILED3
19.4
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
VIN (V)
EFFICIENCY v.s VIN
90
85
VOLED vs. VIN
16
14
VOLED 12V
12
VOLED=10V
10
VOLED=8.5V
8
6
ILED1,3 = 20mA
CH1,2,3 = 4W+OLED+4W
COLED = 10uF
4
2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 6.5
VIN (V)
EFFICIENCY vs. ILED
90
Vin=5.6V
85
4.2V
3.6V
80
3.0V
2.7V
75
80
70
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
VIN (V)
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
VOLED = 10V
70
ILED1,3 = 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
CH1,2,3=20mA+10V+20mA
86
84
CH1,2,3=5mA+10V+20mA
82
CH1,2,3=20mA+10V+5mA
80
78
L = 4.7uH
76
CH1,2,3 = 4W+OLED+2W
TA = 25 ºC
74
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.0
VIN (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
5