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CP494 参数 Datasheet PDF下载

CP494图片预览
型号: CP494
PDF下载: 下载PDF文件 查看货源
内容描述: 开关模式脉宽调制控制电路 [SWITCHMODE Pulse Width Modulation Control Circuit]
分类和应用: 开关
文件页数/大小: 11 页 / 155 K
品牌: CERAMATE [ CERAMATE TECHNICAL ]
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CP494  
SWITCHMODE Pulse Width Modulation Control Circuit  
V
ref  
6
5
R
C
T
V
CC  
R
Master  
S
T
R
T
12  
V > 40V  
in  
1N975A  
V = 39V  
C
T
Z
5.0V  
Ref  
V
ref  
270  
Gnd  
7
6
5
R
C
T
Slave  
(Additional  
Circuits)  
T
Figure 18. Slaving Two or More Control Circuits  
Figure 19. Operation with Vin > 40 V Using  
External Zener  
+V = 8.0V to 20V  
in  
12  
+V = 28 V  
O
I = 0.2 A  
1N4934  
47  
O
1
V
CC  
T
1
+
-
8
22  
k
2
Tip  
32  
C
C
1
L
1
1M  
33k  
3
+
CP494  
50  
35V  
Comp  
-
+
50  
25V  
0.01  
0.01  
15  
16  
11  
Tip  
32  
4.7k  
2
+
50  
35V  
+
1
2
OC  
V
REF  
DT  
C
T
R
T
Gnd  
7
E
E
1.0  
47  
1N4934  
13 14  
4
5
6
9
10  
+
240  
4.7k  
4.7k  
10  
10k  
15k  
0.001  
All capacitors in mF  
Figure 20. Pulse Width Modulated Push–Pull Converter  
Test  
Conditions  
= 10 V to 40 V  
Results  
14 mV 0.28%  
3.0 mV 0.06%  
65 mV pp P.A.R.D.  
1.6 A  
L1 - 3.5 mH @ 0.3 A  
T1 - Primary: 20T C.T. #28 AWG  
T1 - Secondary: 12OT C.T. #36 AWG  
T1 - Core: Ferroxcube 1408P-L00-3CB  
Line Regulation  
Load Regulation  
Output Ripple  
V
in  
V
in  
V
in  
V
in  
V
in  
= 28 V, I = 1.0 mA to 1.0 A  
O
= 28 V, I = 1.0 A  
O
Short Circuit Current  
Efficiency  
= 28 V, R = 0.1 W  
L
= 28 V, I = 1.0 A  
71%  
O
* All specs and applications shown above subject to change without prior notice.  
1F-5 NO.66 SEC.2 NAN-KAN RD ., LUCHU , TAOYUAN, TAIWAN  
Tel:886-3-3214525  
Email: server@ceramate.com.tw  
Http: www.ceramate.com.tw  
Rev 1.0 Apr.19,2004  
Page 9 of 11  
Fax:886-3-3521052