SLIN-12F2AX Datasheet, PDF (13/25 Pages) Bel Fuse Inc. – 2.4 Vdc - 5.5 Vdc Input, 0.6 Vdc - 3.63 Vdc /12 A Output

NON-ISOLATED DC/DC CONVERTERS
2.4 Vdc - 5.5 Vdc Input, 0.6 Vdc - 3.63 Vdc /12 A Output
December 2, 2010
Bel Power Inc., a subsidiary of Bel Fuse Inc.
Fig. A
15
10
5
1x10uF External Cap
1x47uF External Cap
2x47uF External Cap
4x47uF External Cap
Fig. B
15
10
5
1x10uF External Cap
1x47uF External Cap
2x47uF External Cap
4x47uF External Cap
0
0.5
1
1.5
2
2.5
3
3.5
Output Voltage(Volts)
0
0.5
1
1.5
2
2.5
3
Output Voltage(Volts)
Safety Considerations
For safety agency approval the power module must be installed in compliance with the spacing and separation
requirements of the end-use safety agency standards, i.e., UL 60950-1, CSA C22.2 No. 60950-1-03, and VDE
0850:2001-12 (EN60950-1) Licensed.
For the converter output to be considered meeting the requirements of safety extra-low voltage (SELV), the input
must meet SELV requirements. The power module has extra-low voltage (ELV) outputs when all inputs are ELV.
Remote On/Off
Parameter
Min
Typ
Max Unit
Notes
Signal Low (Unit On)
-0.2
-
Vin-1.6
V
Active Low
The remote on/off pin open, Unit on.
Signal High (Unit Off)
Vin-0.8
-
Vin,max V
Signal Low (Unit Off)
-0.2
-
0.3
V
Active High
The remote on/off pin open, Unit on.
Signal High (Unit On)
Vin-0.8
-
Vin,max V
The SLIN-12F2Ax modules feature an On/Off pin for remote On/Off operation. Two On/Off logic options are
available. In the Positive Logic On/Off option, the module turns ON during a logic High on the On/Off pin and
turns OFF during a logic Low. With the Negative Logic On/Off option, the module turns OFF during logic High
and ON during logic Low. The On/Off signal is always referenced to ground. For either On/Off logic option,
leaving the On/Off pin disconnected will turn the module ON when input voltage is present.
For positive logic modules, the circuit configuration for using the On/Off pin is shown in Figure A on the next
page. When the external transistor Q1 is in the OFF state, Q2 is ON, the internal PWM Enable signal is pulled
low and the module is ON. When transistor Q1 is turned ON, the On/Off pin is pulled low, Q2 is turned off and the
internal PWM Enable signal is pulled high through the 23.7K pull-up resistor and the module is OFF.
For negative logic On/Off modules, the circuit configuration is shown in Figure B on the next page. The On/Off
pin should be pulled high with an external pull-up resistor (suggested value for the 2.4V to 5.5Vin range is
3Kohms). When transistor Q1 is in the OFF state, the On/Off pin is pulled high and the module is OFF. The
On/Off threshold for logic High on the On/Off pin depends on the input voltage and its minimum value is V_IN –
1.6V. To turn the module ON, Q1 is turned ON pulling the On/Off pin low.
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel [phone] • Fax [phone] • www.belfuse.com
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