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PEB2023 Datasheet(PDF) 13 Page - Siemens Semiconductor Group

Part # PEB2023
Description  ISDN DC Converter Circuit IDCC
PDF  25 Pages
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Manufacturer  SIEMENS [Siemens Semiconductor Group]
Direct Link  http://www.siemens.com/
Logo SIEMENS - Siemens Semiconductor Group

PEB2023 Datasheet(HTML) 13 Page - Siemens Semiconductor Group

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PEB 2023
PEF 2023
Overview
Semiconductor Group
13
08.97
For calculation of resistor R
7:
V
IN, input voltage :
V
INmin
= 8V,
V
INmax
= 16V
V
EXT :VEXTmin = 6V,
V
EXTmax = 9V
I
R7, input current :
I
R7min = 1mA,
I
R7max
= 6mA
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 R7min is higher than
R
7max, then the input voltage range is not correct; VINmax-VINmin is too large.
Note:
If V
INmin = 6V and VINmax = 9V then the resistor R7 is not necessary. The input
voltage V
IN can directly be connected to VEXT.
Figure 6
PEB/F 2023 in a non-isolated Flyback Configuration
R
7min
V
INmax
V
EXT ma x
–
I
R7 m ax
------------------------------------------------
1 667k
Ω
,
==
R
7m a x
V
INmin
V
EX Tm in
–
I
R7 mi n
----------------------------------------------
2k
Ω
==
8 ... 16 V
PEB 2023
PEF 2023
1
2
3
4
56
7
GND
13
11
V
EXT
V
REF
12
810
V
SYNC
RC
COMP
GA
P
V
N
UV
I
P
14
V
S
+
N1
0 V
+
N2a 220µF
20%
+
+ 5 V
0 V
BYS 21-45
BSP 295
C
SS
+
UVx
N2b
+
- 42 V
BAS 21
9
N2c
+
BYS 21-45
2.2 V
R
Load1
82Ω/1%
R
Load2
3.9ΚΩ/1%
R
Load3
130Ω/1%
68µF
20%
100µF
20%
0.1Ω/5%
0.47µF
20%
C
L1
C
L2
C
L3
C
1
2ΚΩ/1%
R
1
39ΚΩ
5%
1nF
5%
1µF
20%
C
3
47ΚΩ/5%
100nF
10%
R
2
C
2
72ΚΩ/1%
R
3
R
4
D
1
D
2
D
3
T
1
R
5
R
7
C
5
C
6
100µF
20%
+
4.7µF
20%
C
4
18ΚΩ/1%
1ΜΩ/10%
R
6



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