SLIN-20E1A_10 Datasheet, PDF (15/26 Pages) Bel Fuse Inc. – NON-ISOLATED DC/DC CONVERTERS

NON-ISOLATED DC/DC CONVERTERS
4.5 Vdc - 14 Vdc Input, 0.69 Vdc - 5.5 Vdc /20 A Outputs
December 10, 2010
Bel Power, Inc. , a subsidiary of Bel Fuse, Inc.
Over Current Protection
To provide protection in a fault (output overload) condition, the unit is equipped with internal current-limiting
circuitry and can endure current limiting continuously. At the point of current-limit inception, the unit enters hiccup
mode. The unit operates normally once the output current is brought back into its specified range.
Over Temperature Protection
To provide protection in a fault condition, the unit is equipped with a thermal shutdown circuit. The unit will
shutdown if the over temperature threshold of 135°C is exceeded at the thermal reference point Tref. The thermal
shutdown is not intended as a guarantee that the unit will survive temperatures beyond its rating. Once the unit
goes into thermal shutdown it will then wait to cool before attempting to restart.
Input Under-voltage Lockout
At input voltages below the input under voltage lockout limit, the module operation is disabled. The module will
begin to operate at an input voltage above the under voltage lockout turn-on threshold.
Output Voltage Programming
The output voltage of the SLIN-20E1Ax can be programmed to any voltage from 0.69dc to 5.5Vdc by connecting
a resistor between the Trim and GND pins of the module. Certain restrictions apply on the output 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 for output voltages of 0.9V and lower, the input
voltage must be lower than the maximum of 14V. The Lower Limit curve shows that for output voltages of 3.3V
and higher, the input voltage needs to be larger than the minimum of 4.5V.
16
14
12
Upper Limit
10
8
6
4
Lower Limit
2
0
0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 6
Output Voltage (V)
Output Voltage vs. Input Voltage Set Point Area plot showing limits where the output voltage can be set for
different input voltages.
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel [phone] • Fax [phone] • www.belfuse.com
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