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參數(shù)資料
| 型號： | RP-21225XX |
| 英文描述： | POWER CONTROLLERS|STAR Series Programmable. Low Cost. EMI Tolerant Module |
| 中文描述： | POWER控制器|星系列可編程。低成本。百代容錯模塊 |
| 文件頁數(shù)： | 8/14頁 |
| 文件大小： | 136K |
| 代理商： | RP-21225XX |
8
Data Device Corporation
www.ddc-web.com
RP-21000 Series
G-12/02-300
The Power MOSFETs have the opposite characteristics from
that of thermal runaway in bipolar devices. A local hot-spot will
steer current away from itself as its resistance in this area goes
up. This results in even current sharing throughout the entire
device, thereby eliminating hot-spots.The inherent advantage of
not having secondary breakdown is that the entire MOSFET has
to exceed its temperature limitations before damage results.This
characteristic makes the Power MOSFET more rugged when
used for power switching then bipolar devices.
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 Control Circuit are
all electrically isolated. FIGURE 1 shows this isolation as the
"ISOLATED CONTROL CIRCUIT."
SSPC failure or Status 2 shorted to ground
Load is “OFF”, Normal Condition
SSPC failure or Status 2 shorted to ground
Load is “ON”, Normal Condition
Load is “OFF”, Tripped
Load is “ON”, Load < 5.0% Rated Current
LOW
HIGH
LOW
HIGH
LOW
HIGH
HIGH
HIGH
LOW
LOW
HIGH
HIGH
LOW
LOW
HIGH
HIGH
HIGH
HIGH
SSPC failure or Status1 shorted to ground
HIGH
LOW
LOW
SSPC failure, or Status1 and Status 2 short-
ed to ground, or No Bias
LOW
SYSTEM STATUS
STATUS 2
LOW
STATUS 1
Status 1 indicates a logic LOW if > 15% of the rated current is flowing.
Status 2 indicates a logic LOW if the SSPC is tripped due to overcurrent.
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
2
T TRIP CURVE: K-factor adjustments
OUTPUT RISE AND FALL TIMES:Turn-off and Turn-on times
can be factory modified (e.g., capacitive loads)
CURRENT RANGE
POWER-ON RESET: Other options are available
INPUT CONTROL:
TTL or CMOS or Both with Hysteresis (Schmitt trigger char-
acteristics)
CUSTOM PACKAGING
OPTIONAL STATUS TRUTH TABLE (See TABLE 6)
LOW
CONTROL
TABLE 6. OPTIONAL STATUS TRUTH TABLE
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