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| 型號： | PSB483-9IRC |
| 廠商： | POWER-ONE INC |
| 元件分類： | 電源模塊 |
| 英文描述： | 1-OUTPUT DC-DC REG PWR SUPPLY MODULE |
| 文件頁數(shù)： | 10/13頁 |
| 文件大?。?/td> | 221K |
| 代理商： | PSB483-9IRC |
PSB Series Extended Data Sheet
Positive Switching Regulators (Rugged)
REV. OCT 17, 2003
Page 6 of 13
1.2
1.0
0.8
0.6
0.4
0
0.2
0.4
1.0
1.2
0.2
0.6
0.8
1.4
Vo/Vo nom
Io/Io max
I o
ma
x
Io L
05026
Fig. 6
Overload, short-circuit behaviour Vo versus Io at Vi - 80 V
or
Io - Io nom.
Io
Vi [V]
Io max
Io nom
Vi min
80
108
144
TA = 46C, TC = 83C
1A
05028
TA = 60C, TC = 90C
TA = 71C, TC = 95C
Fig. 5
Typical temperature dependent output current limitation
response Io L.
Short Circuit Behaviour
A constant current limitation circuit holds the output cur-
rent almost constant whenever an overload or a short cir-
cuit is applied to the regulator's output. It acts self-protect-
ing and recovers – in contrary to the fold back method –
automatically after removal of the overload or short circuit
condition.
Auxiliary Functions
i Inhibit for Remote On and Off
Note: With open i-input, output is enabled (
Vo = on)
The inhibit input allows the switching regulator output to
be disabled 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 switching on or off.
Fig. 7
Typical inhibit current Iinh versus inhibit voltage Vinh
4
2
0
–50 –40
20
40
–30
0
–20 –10
10
30
50
5
3
1
I
inh [mA]
V
inh [V]
Vo on
V
o off
V
inh
=
0.8
V
inh
=
2.4
V
06034
0
t
0
Inhibit
1
0.1
1
Vo/Vo nom
tr
tf
06001
Fig. 9
Output response as a function of inhibit signal
Vi+
Gi–
Go–
i
Vo+
Iinh
Vinh
06009
Fig. 8
Definition of Iinh and Vinh
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