Beta Dyne, Inc. · 110 Elm St, Unit 12 · Bridgewater, MA 02324 · Phone 508-697-1993 · Fax 508-697-2045 · www.beta-dyne.com
15W DC/DC CONVERTER DCDC15_DS_REV03.PDF SHEET 3 OF 6
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ENVIRONMENT AL SPECIFICA TIONS
PHYSICAL CHARACTERISTICS
1. Maximum output current must not exceed 2 amps at either output.
NOTES
15W SINGLE
TABLE 1. Minimum input operating voltage range
for 24VIN and 48VIN models
FIGURE 1. Worst case derating of 15W series
EXTERNAL SYNCHRONIZATION
Our 15W DC/DC converters can be synchronized to an ex-
ternal TTL or CMOS clock signal. Insert a 470pf to 1000pF ce-
ramic capacitor between the driving clock signal and the SYNC
pin (Pin 2) of the convertor. The frequency of the signal must be
To trim the output voltage DOWN, connect a 5% ¼W resis-
tor between the + (plus) output and trim pin of the converter. To
trim the output voltage UP, connect a 5% ¼W resistor between the
– (minus) output and trim pins of the converter. For UP/DOWN
trimming capability, connect a 10kW potentiometer between the +
and – output pins, with the wiper arm connected to the trim pin.
The trim resistors/potentiometer can be connected at the con-
verter output pins or the load. However, if connected at the load,
between 390kHz and 430kHz, with a duty cycle of 50% and an
amplitude between 3Vdc minimum and 5Vdc typical. See Applica-
tion Note DC-005: Synchronization.
the resistance of the runs becomes part of the feedback network
which improves load regulation. If the load is some distance from
the converter , the use of #20 gauge wire is recommended to avoid
excessive voltage drop due to the resistance of the circuit paths.
See our application notes:
DC-001: Testing Transient Response in DC/DC Converters
DC-004: Thermal Consideration for DC/DC Converters
EXTERNAL TRIMMING OF OUTPUT VOLTAGES (SINGLE AND DUAL ONLY)