SLIN-03F2A Datasheet, PDF (16/26 Pages) Bel Fuse Inc. – NON-ISOLATED DC/DC CONVERTERS

NON-ISOLATED DC/DC CONVERTERS
2.4 Vdc - 5.5 Vdc Input, 0.6 Vdc - 3.63 Vdc /3 A Output
December 10, 2010
Bel Power Inc., a subsidiary of Bel Fuse Inc.
Output Trim Equations
Without an external resistor between Trim and GND pins, the output of the module will be 0.6Vdc. To calculate
the value of the trim resistor, Rtrim for a desired output voltage, use the following equation:
Rtrim
=
⎡
⎢
⎣
(Vo¹âˆ’^.20.6)^{⎥⎦⎤kΩ}
Rtrim is the external resistor in kΩ
Vo is the desired output voltage.
By using a ±0.5% tolerance trim resistor with a TC of ±25ppm, a set point tolerance of ±1.5% can be achieved as
specified in the electrical specification. Table 1 provides Rtrim values required for some common output
voltages.
Table 1
V_{O, set} (V)
0.6
1.0
1.2
1.5
1.8
2.5
3.3
Rtrim (KΩ)
Open
3.0
2.0
1.333
1.0
0.632
0.444
Circuit configuration for programming output voltage using
an external resistor
Remote Sense
The SLIN-03F2Ax power modules have a Remote Sense feature to minimize the effects of distribution losses by
regulating the voltage at the SENSE pin. The voltage between the SENSE pin and VOUT pin must not exceed
0.5V. Note that the output voltage of the module cannot exceed the specified maximum value. This includes the
voltage drop between the SENSE and Vout pins. When the Remote Sense feature is not being used, connect
the SENSE pin to the VOUT pin.
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel [phone] • Fax [phone] • www.belfuse.com
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