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參數(shù)資料
| 型號： | PSC3E12-2R |
| 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)： | 8/8頁 |
| 文件大小： | 363K |
| 代理商： | PSC3E12-2R |
PSC Series
Switching Regulators, PCB & Chassis
Benign Environment
Edition 4/4.99
8/8
MELCHER
The Power Partners.
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 inh
Input current when inhibited
Ui = Ui nom
10
mA
0
t
0
Inhibit
1
0.1
1
Uo/Uo nom
tr
tf
06001
Fig. 11
Output response as a function of inhibit signal
i Inhibit for Remote On and Off
Note: With open i-input, output is enabled (
Uo = 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
Uinh
06009
Fig. 10
Definition of Iinh and Uinh
Fig. 9
Typical inhibit current Iinh versus inhibit voltage Uinh
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
06034
Description of Options
With this series, the options i (inhibit) and R (control input for output voltage adjustment) are defined as a package. Other
combinations or parts of this package are not available.
R Control for Output Voltage Adjustment
Note: With open R input,
Uo ≈ Uo nom.
The output voltage
Uo can either be adjusted with an exter-
nal reference voltage (
Uext) or with an external resistor
(
Rext). The adjustment range is 0…100% of Uo nom. The
Fig. 7
Voltage adjustment with Uext between R and G (Go–)
Uo
Uext
≈ 2.5 V –––––
Uo
≈ U
o nom –––––
Uo nom
2.5 V
Fig. 8
Voltage adjustment with external resistor Rext
4000
U
o
Uo nom Rext
Rext
≈ –––––––––––
Uo
≈ ––––––––––––
Uo nom – Uo
Rext + 4000
Vo+
R
+
4000
G
Uref
Uext
–
+
Go –
06035
Caution: To prevent damage
Uext must neither exceed
2.7 V, nor be negative!
Vo +
R
–
+
G
4000
Uref
Rext
Go –
06040
minimum differential voltage
DUio min between input and out-
put (see:
Electrical Input Data) should be maintained.
Undervoltage look-out = minimum input voltage.
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