SLIN-12E1AX Datasheet, PDF (16/26 Pages) Bel Fuse Inc. – NON-ISOLATED DC/DC CONVERTERS 4.5 Vdc - 14 Vdc Input, 0.69 Vdc - 5.5 Vdc /12 A Outputs

NON-ISOLATED DC/DC CONVERTERS
4.5 Vdc - 14 Vdc Input, 0.69 Vdc - 5.5 Vdc /12 A Outputs
November 5, 2009
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 0.69Vdc. To calculate
the value of the trim resistor, Rtrim for a desired output voltage, use the following equation:
Rtrim
=
⎡
⎢⎣ _(Vo
6_−.09.69_{)⎥⎦⎤kΩ}
Rtrim is the external resistor in kΩ
Vo is the desired output voltage.
Table 1 provides Rtrim values required for some common output voltages.
Table 1
V_{O, set} (V)
0.7
1.0
1.2
1.5
1.8
2.5
3.3
5.0
Rtrim (KΩ)
690
22.26
13.53
8.519
6.216
3.812
2.644
1.601
By using a ±0.5% tolerance trim resistor with a TC of ±100ppm, a set point tolerance of ±1.5% can be achieved
as specified in the electrical specification.
Remote Sense
The SLIN-12E1Ax power modules have a Remote Sense feature to minimize the effects of distribution losses by
regulating the voltage between the VS+ and VS– pins. The voltage between the VS– and GND pins of the
module must not drop below –0.2V. If Remote Sense is being used, the voltage between VS+ and VS– cannot
be more than 0.5V larger than the voltage between VOUT and GND. Note that the output voltage of the module
cannot exceed the specified maximum value. When the Remote Sense feature is not being used, connect the
VS+ pin to the VOUT pin and the VS– pin to the GND pin.
V_IN(+)
ON/OFF
V_O(+)
VS+
TRIM
GND
R _trim
LOAD
Circuit configuration for programming output voltage using an external resistor
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel [phone] • Fax [phone] • www.belfuse.com
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