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): 15/25頁(yè)
文件大?。?/td> 145K
代理商: Q67220-H1059
PEB 2023
PEF 2023
Overview
Semiconductor Group
15
08.97
Calculation example: figure 7 with R
Vs
= 4,7k
for t
100msec
:
for t
10msec
:
In this example the DC/DC converter begins operating when the input voltage exceeds
40,35V. The maximum transient input voltage is 177V / 271V for a duration of 100msec
/ 10msec. The maximum static input voltage is given by V
ZD1
+ 90V = 120V, see absolute
maximum ratings.
1.7
Fast Input Undervoltage Detection
With three extra devices (D
5
, D
6
and R
8
, see
figure 8
) an undervoltage state on the input
can be detected faster than the voltage on capacitor C
6
decreases. See also chapter
undervoltage lockout“ on page 17.
Figure 8
PEB/F 2023, Fast Input Undervoltage Detection
V
INstart
V
ZD1
8
R
Vs
i
LVR
(
)
+
+
30V
8V
4 7k
500
μ
A
(
)
+
+
40 35V
,
=
=
=
V
INmax
V
ZD1
100
R
Vs
i
Vsmax
(
)
+
+
30V
100V
4 7 k
10mA
(
)
+
+
177V
=
=
=
V
INmax
V
ZD1
100
R
Vs
i
Vsmax
(
)
+
+
30V
100V
4 7 k
30mA
(
)
+
+
271V
=
=
=
PEB 2023
PEF 2023
GND
3
7
V
S
+
0 V
BZV55C30
C
6
100μF
20%
ZD
11
UV
R
6
10Μ/10%
R
8
10Μ/10%
D
5
D
6
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