psb246-2ir Power-One, psb246-2ir Datasheet - Page 8

• Manufacturer Part Number: psb246-2ir
• Description: Psb Series Extended Positive Switching Regulators Benign
• Manufacturer: Power-One

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, V
The output voltage V
nal reference voltage ( V
( R
Fig. 7
Voltage adjustment with V
Fig. 9
Typical inhibit current I
i Inhibit for Remote On and Off
Note: With open i-input, output is enabled ( V
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.
REV. OCT 17, 2003
I
inh
Caution: To prevent damage V
2.7 V, nor be negative!
5
4
3
2
1
0
ext
–50 –40
V
[mA]
ext
). The adjustment range is 0 – 100% of V
+
2.5 V • –––––
V
–30
ext
V
R
G
o
on
–20 –10
Go –
V
V
o nom
4000
V
o
o
ref
can either be adjusted with an exter-
inh
ext
versus inhibit voltage V
0
ext
o
) or with an external resistor
Vo+
between R and G (Go–)
10
V
V
o nom
+
–
o
ext
20
.
V
must neither exceed
V
06035
o nom
o
30
off
• –––––
40
o nom
o
06034
2.5 V
V
= on)
50
ext
. The mini-
inh
V
inh
Page 8 of 10
[V]
Positive Switching Regulators (Benign)
mum differential voltage D V
(see: Electrical Input Data ) should be maintained.
Undervoltage look-out = minimum input voltage.
Fig. 8
Voltage adjustment with external resistor R
Fig. 10
Definition of I
Fig. 11
Output response as a function of inhibit signal
V
0.1
R
o
Inhibit
1
1
0
0
/ V
ext
o nom
PSB Series Extended Data Sheet
R
Vi+
Gi–
–––––––––––
ext
4000
V
o nom
inh
t
R
G
and V
r
– V
Go –
• V
o
o
inh
U
4000
ref
io min
Go–
Vo+
V
o
i
between input and output
Vo +
––––––––––––
+
–
R
V
ext
o nom
I
inh
t
+ 4000
f
06040
V
inh
• R
ext
ext
06001
t
t
06009