參數(shù)資料
型號(hào): Q67220-H1059
廠商: SIEMENS AG
英文描述: ISDN DC Converter Circuit IDCC
中文描述: 綜合業(yè)務(wù)數(shù)字網(wǎng)DC轉(zhuǎn)換器電路IDCC
文件頁(yè)數(shù): 13/25頁(yè)
文件大?。?/td> 145K
代理商: Q67220-H1059
PEB 2023
PEF 2023
Overview
Semiconductor Group
13
08.97
For calculation of resistor R
7
:
V
IN
, input voltage :
V
INmin
= 8V,
V
EXTmin
= 6V,
I
R7min
= 1mA,
V
INmax
= 16V
V
EXTmax
= 9V
I
R7max
= 6mA
V
EXT
:
I
R7
, input current :
To get lower power dissipation the value of resistor R
7
should also be as high as
possibile. For this reason we use R
7max
. If in the calculation above R
7min
is higher than
R
7max
, then the input voltage range is not correct; V
INmax
-V
INmin
is too large.
Note:
If V
INmin
= 6V and V
INmax
= 9V then the resistor R
7
is not necessary. The input
voltage V
IN
can directly be connected to V
EXT
.
Figure 6
PEB/F 2023 in a non-isolated Flyback Configuration
R
7min
V
-------------------–
V
I
R7max
1 667k
=
=
R
7max
V
------------------–
V
I
R7min
2k
=
=
8 ... 16 V
PEB 2023
PEF 2023
V
REF
9
1
2
3
4
GA
5
V
EXT
6
C
SS
7
V
S
GND
13
11
UV
12
UVx
8
10
VSYNC
P
RC
14
COMP
V
N
I
P
+
N1
0 V
+
N2a220μF
20%
+
+ 5 V
0 V
BYS 21-45
BSP 295
+
N2b
+
- 42 V
BAS 21
N2c
+
BYS 21-45
2.2 V
R
Load1
82/1%
R
Load2
3.9Κ/1%
R
Load3
130/1%
AA
AA
68μF
20%
100μF
20%
0.1/5%
0.47μF
20%
C
5
C
C
L2
C
L3
C
1
1nF
5%
2Κ/1%
R
1
39Κ
5%
1μF
20%
C
3
47Κ/5%
100nF
10%
R
2
C
2
72Κ/1%
R
3
R
4
D
1
D
2
D
3
T
1
R
5
R
7
C
6
100μF
20%
+
4.7μF
20%
C
4
18Κ/1%
1Μ/10%
R
6
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