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9
Data Device Corporation
www.ddc-web.com
SSP-21116
J-03/03-0
Due to the current sharing aspects of the power MOSFET, they
can be placed in parallel and share the load equally. DDC has a
standard 28 Vdc 80 AMP power module which uses this tech-
nique.
ISOLATION OF CONTROL AND STATUS
The SSPC was designed with isolation between the load power
and the five volt control logic input and the status outputs. This is
necessary to prevent noise caused by transients or power spikes
on the power line from adversely affecting the operation of the
SSPC. Therefore the case, POWER IN and the Control Circuit
are all electrically isolated. FIGURE 1 shows this isolation as the
"ISOLATED CONTROL CIRCUIT"; also notice the separation of
the power (Slew Control) ground and signal (V bias supply com-
mon) ground.
The electrical isolation is supported by an internal power oscilla-
tor that electrically isolates separate internal power supplies that
will power the internal analog and digital monolithics. This isola-
tion prevents load or logic ground loops from affecting the prop-
er operation of the SSPC. The isolation also insures that a fault
of the switch (MOSFET) could never propagate back into the
SSPC logic or cause damage to the logic side.
OPTIONS
The following characteristics can be factory modified on special
orders:
I
2T TRIP CURVE: K-factor adjustments
OUTPUT RISE AND FALL TIMES: Turn-Off and Turn-On time
can be factory modified (e.g., capacitive loads)
CURRENT RANGE
POWER-ON RESET: Other (V Bias) options are available
LEAKAGE CLAMP: can be deleted
CUSTOM PACKAGING: DIP, Flat Pack, or Smaller 2-5 Amp
package
OPTIONAL STATUS TRUTH TABLE (See Table 6)