UER-12-1000-D12 데이터 시트보기 (PDF) - DATEL Data Acquisition products
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UER-12-1000-D12 Datasheet PDF : 4 Pages
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XER Series
12-15W, SINGLE OUTPUT DC/DC CONVERTERS
Input Fusing
Certain applications and/or safety agencies may require the installation of fuses
at the inputs of power conversion components. For DATEL UER
12-15 Watt DC/DC Converters, you should use slow-blow type fuses with
values no greater than the following:
VIN Range
"D12"
"D48"
Fuse Value
3A
2A
On/Off Control
The On/Off Control pin (pin 4) may be used for remote on/off operation.
A TTL logic high (+2 to +5 Volts, 250µA max.) applied to pin 4 disables the
converter. A TTL logic low (0 to +0.8 Volts, 70µA max.), or no connection,
enables the converter. Control voltages should be referenced to pin 2
(–Input). Applying a voltage to the Control pin when no input power is applied to
the converter can cause permanent damage to the converter.
Synchronization
In critical applications employing multiple switching DC/DC converters, it may
be desirable to intentionally synchronize the switching of selected converters
(so the system noise can be reduced with notch filtering) or to purposely
desynchronize the converters (to lessen the current-carrying requirements on
intermediate dc buses). For multiple UER DC/DC Converters, an external clock
can be applied to pin 4 (Control) of each device. It should be a square wave with
a maximum 1µsec "high" duration and an amplitude between +2V and +5V (see
On/Off Control) referenced to pin 2 (–Input). The frequency of the synchronizing
clock should be higher than that of any individual converter. Therefore, it should
be 185kHz ±5kHz.
Output Trimming
VOUT may be trimmed ±5% via a single external trimpot or fixed resistor. The
trimpot should be connected as shown in Figure 2a with its wiper connected to
pin 8 (Trim). The trimpot can be used to determine the value of a single fixed
resistor which should be connected as shown in Figure 2b. Connect the resistor
between pin 8 (Trim) and pin 6 (+Output) to trim "down" the output voltage.
Connect the resistor between pins 8 and 7 (Common) to trim "up" the output
voltage. Fixed resistors should be metal-film types with absolute TCR’s less
than 100ppm/°C to ensure stability.
1
+INPUT
2
–INPUT
6
OUTPUT
8
TRIM
7
COMMON
Trim Down
20kΩ
5-10
Turns
LOAD
Trim Up
Figure 2a. Trim Connections Using a Trimpot
1
+INPUT
2
–INPUT
6
OUTPUT
8
TRIM
7
COMMON
Trim
Down
LOAD
Trim Up
Figure 2b. Trim Connections Using Fixed Resistors
CUSTOM CAPABILITIES
DATEL’s world-class design, development and manufacturing team stands
ready to work with you to deliver the exact power converter you need for your
demanding, large volume, OEM applications. And ... we’ll do it on time and
within budget!
Our experienced applications and design staffs; quick-turn prototype capability;
highly automated, SMT assembly facilities; and in-line SPC quality-control
techniques combine to give us the unique ability to design and deliver any
quantity of power converters to the highest standards of quality and reliability.
We have compiled a large library of DC/DC designs that are currently used in a
variety of telecom, medical, computer, railway, aerospace and industrial
applications. We may already have the converter you need.
Contact us. Our goal is to provide you the highest-quality, most cost-effective
power converters available.
®
®
INNOVATION and EXCELLENCE
ISO 9001
REGISTERED
DS-0328 9/98
DATEL, Inc. 11 Cabot Boulevard, Mansfield, MA 02048-1151
Tel: (508) 339-3000 (800) 233-2765 Fax: (508) 339-6356
Internet: www.datel.com Email: sales@datel.com
Data Sheet Fax Back: (508) 261-2857
DATEL (UK) LTD. Tadley, England Tel: (01256)-880444
DATEL S.A.R.L. Montigny Le Bretonneux, France Tel: 01-34-60-01-01
DATEL GmbH München, Germany Tel: 89-544334-0
DATEL KK Tokyo, Japan Tel: 3-3779-1031, Osaka Tel: 6-354-2025
DATEL makes no representation that the use of its products in the circuits described herein, or the use of other technical information contained herein, will not infringe upon existing or future patent rights. The descriptions contained herein
do not imply the granting of licenses to make, use, or sell equipment constructed in accordance therewith. Specifications are subject to change without notice. The DATEL logo is a registered DATEL, Inc. trademark.
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