psb245-7ir Power-One, psb245-7ir Datasheet - Page 12

• Manufacturer Part Number: psb245-7ir
• Description: Psb Series Extended Positive Switching Regulator Industrial
• Manufacturer: Power-One

C Thyristor Crowbar
This option is recommended to protect the load against
power supply malfunction, but it is not designed to sink ex-
ternal currents.
A fixed-value monitoring circuit checks the output voltage
V
crowbar triggers and disables the output. It may be deacti-
vated by removal of the input voltage. In case of a switching
transistor defect, an internal fuse prevents excessive cur-
rent.
Table 10: Crowbar trigger levels
Accessories
A variety of electrical and mechanical accessories are
available including:
– PCB-tags and isolation pads for easy and safe PCB-
– Ring core chockes for ripple and interference reduction.
For more detailed information please refer to: Accessory
Products on the Power-One homepage.
NUCLEAR AND MEDICAL APPLICATIONS - Power-One products are not authorized for use as critical components in life support
systems, equipment used in hazardous environments, or nuclear control systems without the express written consent of the
respective divisional president of Power-One, Inc.
TECHNICAL REVISIONS - The appearance of products, including safety agency certifications pictured on labels, may change
depending on the date manufactured. Specifications are subject to change without notice.
REV. OCT 17, 2003
V
t
Characteristics
o
s
o c
. When the trigger voltage V
mounting.
Trigger voltage
Delay time
Conditions
V
I
T
o
C min
i min
= 0- I
- V
- T
o nom
i max
C max
o c
is reached, the thyristor
min
5.8
5.1 V
max
6.8
1.5
13.5
min
Page 12 of 13
12 V
Positive Switching Regulator (Industrial)
max
1.5
16
Note: As a central overvoltage protection device, the crow-
bar is usually connected to the external load via distributed
inductance of the lines. For this reason, the overvoltage at
the load can temporarily exceed the trigger voltage V
pending on the application, further decentralized over-
voltage protection elements may have to be used addition-
ally. For further information see: Technical Information: Ap-
plication Notes.
16.5
min max
PSB Series Extended Data Sheet
15 V
1.5
19
min
27
24 V
max
1.5
31
min max
40
36 V
45.5
1.5
Unit
o c
µs
V
. De-