SLIN-12F2A BEL [Bel Fuse Inc.], SLIN-12F2A Datasheet - Page 15

• Manufacturer Part Number: SLIN-12F2A
• Description: NON-ISOLATED DC/DC CONVERTERS
• Manufacturer: BEL [Bel Fuse Inc.]

Output Voltage Programming
The output voltage of the SLIN-12F2Ax module can be programmed to any voltage from 0.6dc to 3.63Vdc by
connecting a resistor between the Trim and GND pins of the module.
voltage set point depending on the input voltage. These are shown in the Output Voltage vs. Input Voltage Set
Point Area plot in the figure below. The Upper Limit curve shows that the entire output voltage range is available
with the maximum input voltage of 5.5V. The Lower Limit curve shows that for output voltages of 1.8V and
higher, the input voltage needs to be larger than the minimum of 2.4V.
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 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
December 2, 2010
Rtrim
6
5
4
3
2
1
0
NON-ISOLATED DC/DC CONVERTERS
2.4 Vdc - 5.5 Vdc Input, 0.6 Vdc - 3.63 Vdc /12 A Output
0.5
=
⎡
⎢
⎣
(
1
Vo
V
1
−
O, set
2 .
1.5
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel [phone] • Fax [phone] •
Upper Limit
0.6
1.0
1.2
1.5
1.8
2.5
3.3
0
6 .
Output Voltage (V)
(V)
)
⎤
⎥
⎦
k
2
Ω
Rtrim (KΩ)
2.5
1.333
0.632
0.444
Open
Lower Limit
3.0
2.0
1.0
3
3.5
4
Bel Power Inc., a subsidiary of Bel Fuse Inc.
Circuit configuration for programming output voltage using
an external resistor
Certain restrictions apply on the output
www.belfuse.com
15