參數(shù)資料
型號: NE5560
廠商: NXP Semiconductors N.V.
英文描述: Switched-mode power supply control circuit
中文描述: 開關(guān)電源控制電路
文件頁數(shù): 3/16頁
文件大?。?/td> 240K
代理商: NE5560
Philips Semiconductors
Product specification
NE/SE5560
Switched-mode power supply control circuit
1994 Aug 31
11
δ MAX (%)
12
R1
R2
2
6
DUTY
CYCLE
CONTROL
MAXIMUM
DUTY
CYCLE
(%)
100
90
80
70
60
50
40
30
20
10
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1
R
2
R
1 *
R
2
SL00371
Figure 12. Graph for Determining
δMAX
δ (%)
R1 + R2
(
)
SOFT
ST
ART
DUTY
CYCLE
%
103
104
2
3
4
5
6 7 8 9
2
80
70
60
50
40
30
20
10
δMAX 90%
δMAX 70%
δMAX 50%
δMAX 30%
SL00372
Figure 13. Soft-Start Minimum Duty Cycle vs R1 + R2
0.6V
START
STOP
11
0.48V
from
PWM
RESET
OF OUTPUT
BISTABLE
SL00373
Figure 14. Current Protection Input
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