SLIN-03E1A_10 Datasheet, PDF (17/26 Pages) Bel Fuse Inc. – NON-ISOLATED DC/DC CONVERTERS

NON-ISOLATED DC/DC CONVERTERS
4.5 Vdc - 14 Vdc Input, 0.59 Vdc - 5.5 Vdc /3 A Outputs
December 3, 2010
Bel Power, Inc. , a subsidiary of Bel Fuse, Inc.
Voltage Margining
Output voltage margining can be implemented in the SLIN-03E1Ax modules by connecting a resistor, R_margin-up,
from the Trim pin to the ground pin for margining-up the output voltage and by connecting a resistor, R_margin-down,
from the Trim pin to output pin for margining-down.
Vo
Rmargin-down
MODULE
Q2
Trim
Rmargin-up
Rtrim
Q1
GND
Circuit Configuration for margining Output voltage
Monotonic Start-up and Shutdown
The SLIN-03E1Ax modules have monotonic start-up and shutdown behavior for any combination of rated input
voltage, output current and operating temperature range.
Startup into Pre-biased Output
The SLIN-03E1Ax modules can start into a prebiased output as long as the prebias voltage is 0.5V less than the
set output voltage. Note that prebias operation is not supported when output voltage sequencing is used.
Output Voltage Sequencing
The SLIN-03E1Ax modules include a sequencing feature that enables users to implement various types of
output voltage sequencing in their applications. This is accomplished via an additional sequencing pin. When
not using the sequencing feature, either tie the SEQ pin to VIN or leave it unconnected.
When an analog voltage is applied to the SEQ pin, the output voltage tracks this voltage until the output reaches
the set-point voltage. The final value of the SEQ voltage must be set higher than the set-point voltage of the
module. The output voltage follows the voltage on the SEQ pin on a one-to-one volt basis. By connecting
multiple modules together, multiple modules can track their output voltages to the voltage applied on the SEQ
pin.
For proper voltage sequencing, first, input voltage is applied to the module. The On/Off pin of the module is left
unconnected (or tied to GND for negative logic modules or tied to VIN for positive logic modules) so that the
module is ON by default.
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel [phone] • Fax [phone] • www.belfuse.com
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