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參數(shù)資料
| 型號(hào)： | PSC128-7IPD |
| 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(yè)數(shù)： | 10/13頁(yè) |
| 文件大?。?/td> | 223K |
| 代理商： | PSC128-7IPD |
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PSC Series Extended Data Sheet
Positive Switching Regulators (Industrial)
REV. MAY 12, 2004
Page 6 of 13
0
t
0
Inhibit
1
0.1
1
Vo/Vo nom
tr
tf
06001
Fig. 8
Output response as a function of inhibit signal
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 activa-
tion sequence of the regulators by a logic signal (TTL, C-
MOS, etc.). An output voltage overshoot will not occur when
switching on or off.
Vi+
Gi–
Go–
i
Vo+
Iinh
Vinh
06009
Fig. 7
Definition of Iinh and Vinh
Fig. 6
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]
V
o on
V
o off
V
inh
=
0.8
V
inh
=
2.4
V
06034
Table 4: Inhibit characteristics
Characteristics
Conditions
min
typ
max
Unit
Vinh
Inhibit input voltage to keep
Vo = on
Vi min - Vi max
–50
+0.8
VDC
regulator output voltage -
Vo = off
TC min - TC max
+2.4
+50
t r
Switch-on time after inhibit command
Vi = Vi nom
5ms
t f
Switch-off time after inhibit command
RL = Vo nom /Io nom
10
Ii inh
Input current when inhibited
Vi = Vi nom
10
mA
Vo+
R
–
+
G
4000
Vref
R1
R2
06036
R Control for Output Voltage Adjustment
Note: With open R input,
Vo
≈ Vo nom. R excludes option P.
(For superseded PSR types
Vo
≈ 1.08 Vo nom)
The output voltage
Vo can either be adjusted with an exter-
nal voltage (
Vext) or with an external resistor (R1 or R2). The
adjustment range is 0 - 108% of
Vo nom. The minimum differ-
ential voltage
DVio min between input and output (see: Elec-
trical Input Data) should be maintained. Undervoltage lock-
out = Minimum input voltage.
Fig. 9
Voltage adjustment with Vext between R and G (Go-)
Vo+
R
+
4000
G
Vref
Vext
–
+
06035
Caution: To prevent damage
Vext should not exceed
20 V, nor be negative and
R2 should never be less than
47 k
.
a)
Vo = 0 - 108% Vo nom, using Vext between R and G (Go–)
Vo
Vext
≈ 2.5 V –––––
Vo
≈ Vo nom –––––
Vonom
2.5 V
Fig. 10
Voltage adjustment with external resistor R1 or R2
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