SLIN-30E1AX Datasheet, PDF (14/26 Pages) Bel Fuse Inc. – 6.0 Vdc - 14 Vdc Input, 0.8 Vdc - 2.75 Vdc /30 A Outputs

NON-ISOLATED DC/DC CONVERTERS
6.0 Vdc - 14 Vdc Input, 0.8 Vdc - 2.75 Vdc /30 A Outputs
Jan. 11, 2010
Over Current Protection
Bel Power Inc., a subsidiary of Bel Fuse Inc.
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 125°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-30E1Ax can be programmed to any voltage from 0.8dc to 2.75Vdc by connecting
a resistor (shown as R_trim in the figure below) between Trim and GND pins of the module. Without an external
resistor between Trim and GND pins, the output of the module will be 0.8Vdc. To calculate the value of the trim
resistor, R_trim for a desired output voltage, use the following equation:
R_trim
=
⎡ 8000 ⎤
⎢⎣_{Vo − 0.8}⎥⎦
Ω
Rtrim is the external resistor in Ω
Vo is the desired output voltage
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. Table 1 provides Rtrim values required for some common output
voltages.
Table 1
V_{O, set} (V)
0.8
1.0
1.2
1.5
1.8
2.5
Rtrim (KΩ)
Open
40
20
11.429
8
4.706
VI N(+)
ON/OF F
VO( +)
SENS E
T RIM
G ND
R _{tr im}
LOAD
Circuit configuration to program output voltage using
an external resistor
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel [phone] • Fax [phone] • www.belfuse.com
14