SLIN-12E1A0 BEL [Bel Fuse Inc.], SLIN-12E1A0 Datasheet - Page 17

• Manufacturer Part Number: SLIN-12E1A0
• Description: NON-ISOLATED DC/DC CONVERTERS 4.5 Vdc - 14 Vdc Input, 0.69 Vdc - 5.5 Vdc /12 A Outputs
• Manufacturer: BEL [Bel Fuse Inc.]

Startup into Pre-biased Output
The SLIN-12E1Ax 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.
Voltage Margining
Output voltage margining can be implemented in the SLIN-12E1Ax modules by connecting a resistor, R
from the Trim pin to the ground pin for margining-up the output voltage and by connecting a resistor, R
from the Trim pin to output pin for margining-down.
Monotonic Start-up and Shutdown
The SLIN-12E1Ax modules have monotonic start-up and shutdown behavior for any combination of rated input
voltage, output current and operating temperature range.
Output Voltage Sequencing
The SLIN-12E1Ax 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.
November 5, 2009
NON-ISOLATED DC/DC CONVERTERS
4.5 Vdc - 14 Vdc Input, 0.69 Vdc - 5.5 Vdc /12 A Outputs
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel [phone] • Fax [phone] •
Circuit Configuration for margining Output voltage
MODULE
Trim
Vo
GND
Bel Power, Inc. , a subsidiary of Bel Fuse, Inc.
Rtrim
Q2
Q1
Rmargin-down
Rmargin-up
www.belfuse.com
margin-down
margin-up
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