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| 型號(hào)： | PSB5A8-2IR |
| 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 |
| 封裝： | METAL, CASE B02, MODULE-7 |
| 文件頁數(shù)： | 9/10頁 |
| 文件大?。?/td> | 180K |
| 代理商： | PSB5A8-2IR |
PSB Series Extended Data Sheet
Positive Switching Regulators (Benign)
REV. OCT 17, 2003
Page 8 of 10
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,
Vo
≈ V
o nom.
The output voltage
Vo can either be adjusted with an exter-
nal reference voltage (
Vext) or with an external resistor
(
Rext).The adjustment range is 0 – 100% of Vo nom.The mini-
Fig. 7
Voltage adjustment with Vext between R and G (Go–)
Vo
Vext
≈ 2.5 V –––––
Vo
≈ V
o nom
–––––
Vonom
2.5 V
Fig. 8
Voltage adjustment with external resistor Rext
4000
V
o
Vo nom Rext
Rext
≈ –––––––––––
Vo
≈ ––––––––––––
Vonom – Vo
Rext + 4000
Vo+
R
+
4000
G
Vref
Vext
–
+
Go –
06035
Caution: To prevent damage
Vext must neither exceed
2.7 V, nor be negative!
Vo +
R
–
+
G
4000
Uref
Rext
Go –
06040
mum differential voltage
DVio min between input and output
(see:
Electrical Input Data) should be maintained.
Undervoltage look-out = minimum input voltage.
0
t
0
Inhibit
1
0.1
1
Vo/Vo 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 (
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. 10
Definition of Iinh and Vinh
Fig. 9
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
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