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參數(shù)資料
| 型號： | PSL128-7LIRCDA |
| 元件分類： | 電源模塊 |
| 英文描述： | 1-OUTPUT DC-DC REG PWR SUPPLY MODULE |
| 封裝： | METAL, CASE L04, MODULE |
| 文件頁數(shù)： | 10/11頁 |
| 文件大小： | 245K |
| 代理商： | PSL128-7LIRCDA |
PSL-Family
Switching Regulators 19"
Industrial Environment
5 - 44
Edition 2/96 - Melcher AG
MELCHER
The Power Partners.
5.2
Caution: To prevent damage
Uex should not exceed
Uref, nor be negative.
Vo +
R
–
+
G
4000
Uref
R1
R2
Go –
Fig. 7
Voltage adjustment with external resistor R1 or R2 []
b)
Uo = 0...100% Uo nom, using R1 between R and G (Go-):
R1
4000
Uo
≈ Uo nom ––––––––
R1
≈ –––-––––
R1 + 4000
Uo nom - Uo
c)
Uo = Uo nom...Uo max, using R2 between R and Vo+:
Uo max = Uo nom + 8 %
R2
U ref
Uo
≈ Uref ––––––––––––––––––
k = ––––––
k (
R2 + 4000) - 4000
Uo nom
Uo (1-k)
R2 ≈ 4000 –––––––––
(
Uref = 2.5 V ±4%)
k
Uo - Uref
All formulae give approximate values only.
Uo nom
a)
Uo ≈ Uex ––––––
(
Uref = 2.5 V ±4%)
Uref
Fig. 6
Voltage adjustment with Uex [V] between R and G (Go-):
Vo +
R
+
4000
G
U ref
Uex
–
+
Go –
Standard Features
R External Output Voltage Adjustment
Note: With open R input,
Uo = Uo nom.
(For superseded PSR types,
Uo = 1.08 Uo nom)
R-input together with option i or option P cannot
be supported simultaneously.
The output voltage
Uo can either be adjusted with an exter-
nal resistor (
R 1 or R 2) or with an external voltage (Uex). The
adjustment range is 0...1.08 of
Uo nom. The minimal differen-
tial voltage
U
io min between input and output should be
maintained (see data). Min. input = Undervoltage cut-out.
Data
Table 9: Inhibit characteristics
Characteristics
Conditions
min
typ
max
Unit
Uinh
Inhibit input voltage to keep
Uo = on
Ui min...Ui max
–50
+0.8
V DC
regulator output voltage...
Uo = off
TC min...TC max
+2.4
+50
t r
Switch-on time after inhibit command
Ui = Ui nom
5ms
t f
Switch-off time after inhibit command
RL = Uo nom /Io nom
10
Ii off
Input current when inhibited
Io = 0, Ui =Ui nom
10
mA
Fig. 10
Inhibit current Iinh versus inhibit voltage Uinh
Fig. 9
Output response as a function of inhibit signal
Description of Options
Option i Inhibit
Note: With open i-input, output is enabled (
Uo = on).
Inhibit excludes R function!
The inhibit input allows the switching regulators to be disa-
bled via a control signal. In systems with several units, this
feature can be used, for example, to control the activation
sequence of the regulators by a logic signal (TTL, C-MOS,
etc.).
An output voltage overshoot will not occur when the units
are switched on or off.
1
0.1
0
Uo/Uo nom
U inh
tr
tf
t
1
4
2
0
-50 -40
20
40
-30
0
-20 -10
10
30
50
5
3
1
I inh [mA]
U inh [V]
U o on
U o off
U
inh
=
0.8
V
U
inh
=
2.4
V
Vi+
Gi–
Go–
i
Vo+
Iinh
Uinh
Fig. 8
Definition of Iinh and Uinh
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