PEB2023 Datasheet, PDF (12/25 Pages) Siemens Semiconductor Group – ISDN DC Converter Circuit IDCC

PEB 2023
PEF 2023
Overview
Figure 5 shows the PEB/F 2023 in a non-isolated minimum configuration by using
supply voltage range 1 (for this input voltages also supply voltage range 2 is possible).
The voltage drop over R₆ is the difference between input voltage and undervoltage
detection level. To get low power dissipation the value of resistor R₆ should be as high as
possibile. The minimum current through R₆ is about 100nA, the maximum current is 1mA
(see absolute maximum ratings).
25 ... 38 V
C₆ ⁺
100µF
20%
0V
R₆
1ΜΩ/10%
0.47µF
20%
C_{5 +}
R₅
0.22Ω/5%
2.2µF
20%
C₇ ⁺
7 11 12 5 6
T₁
BSS 296
24
V_S UV UVx V_EXT C_SS I_P GA
PEB 2023
PEF 2023
GND RC ^VREF ^VP SYNC COMP ^VN
3 14 1 9 13 8 10
L₁
10mH
D₁
BAS 78B
R₁
27ΚΩ
5%
C₁
68pF
5%
R₂
10ΚΩ/5%
+ _C3
1µF
20%
C₂
470nF
10%
+ 42 V
R₃ 150ΚΩ
1%
+ ^C4
R₄
16ΚΩ/1%
220µF
20%
R_Load
330Ω/1%
0V
Figure 5
PEB/F 2023 in a non-isolated Minimum Configuration
Figure 6 shows the PEB/F 2023 in a non-isolated flyback configuration with transformer
using supply voltage range 0. The voltage drop over R₆ is V_EXT-1V. To get low power
dissipation the value of resistor R₆, should be as high as possibile. For calculating the
value of resistor R₆ the minimum current through R₆ is about 100nA and the maximum
current is about 100µA.
Semiconductor Group
12
08.97