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參數(shù)資料
| 型號： | NCP9003 |
| 廠商： | ON SEMICONDUCTOR |
| 英文描述： | Compact Backlight LED Boost Driver |
| 中文描述： | 緊湊型背光LED升壓驅(qū)動器 |
| 文件頁數(shù)： | 10/22頁 |
| 文件大?。?/td> | 294K |
| 代理商： | NCP9003 |
NCP9003
http://onsemi.com
10
Figure 14. Overall Efficiency vs. Power Supply @
I
out
= 40 mA, L = 22 H
Figure 15. Feedback Voltage Stability
Y
V
bat
(V)
205
200
F
195
TEMPERATURE (
°
C)
199
202
203
201
0
20
100
198
197
196
40
40
20
60
80
204
5
0
F
5
40
TEMPERATURE (
°
C)
1
2
3
1
0
20
100
2
3
4
40
20
60
80
4
V
bat
= 3.1 V thru 5.5 V
V
bat
= 3.1 V thru 5.5 V
Figure 16. Feedback Voltage Variation
0
2.50
10
20
30
40
50
60
70
80
90
100
3.00
3.50
4.00
4.50
5.00
5.50
5 LED/40 mA
3 LED/40 mA
4 LED/40 mA
2 LED/40 mA
Feedback Variation vs. Temperature
Feedback Variation vs. Nominal
(V
bat
= 3.0 V, 6.0 V, T = 25 C)
Figure 17. Standby Current
1.4
2.7
I
0.0
V
bat
(V)
0.6
1.0
0.8
5.5
0.4
0.2
1.2
40
°
C thru 125
°
C
3.3
3.9
4.5
5.1
Standby Current vs. V
bat
4 LED
5 LED
Figure 18. Typical Operating Frequency
0
2.5
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
2 LED
f
V
bat
(V)
3 LED
Figure 19. Overvoltage Protection
26
24
40
O
22
TEMPERATURE (
°
C)
25
0
100
23
40
80
V
bat
= 5.5 V
V
bat
= 2.7 V
V
bat
= 3.6 V
20
130
20
60
120
Frequency = f(V
bat
) @ I
out
= 20 mA
L
out
= 22 H
OVP vs. Temperature
Yield = f(V
bat
) @ I
out
= 40 mA/L
out
= 22 H
All curve conditions: L = 22 H, C
in
= 4.7 F, C
out
= 1.0 F,
Typical curve @ T
°
= +25
°
C
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