直流开关稳压器中英文对照外文翻译文献Word文档下载推荐.docx
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characteristics
its
methodology,
introduced
a
number
practical
circuit.
Keywords:
circuit
A、Introduction.
DC
regulator
used
price
more
expensive
high-power
devices,
control
is
also
complex,
In
addition,
load
regulators
are
generally
large
highly
integrated
electronic
systems
installed
devices.
Transistors
device
tolerance
electricity,
less
heat
shocks.
Regulators
therefore
should
take
into
account
voltage
their
own
safety.
Many
different
types
protection,
polarity
here,
program
over-current
over-voltage
under-voltage
over-temperature
circuit.
Usually
chosen
to
be
some
combination
constitutes
complete
system.
B、Polarity
protection
input
not
regulated
supply.
Operating
errors
or
accidents
as
result
situation
will
wrong
polarity;
damaged.
Polarity
purposes,
make
only
when
correct
connected
work
at.
Connecting
single
can
achieve
protection.
Since
diode
D
flow
through
total
current,
this
applied
low-power
suitable.
larger
occasion,
while
procedure
protect
link,
save
required
for
diodes,
consumption
reduced.
order
easy
operate,
it
easier
identify
not,
collect
next
light.
C、Procedures
protect
rather
complicated,
basically
divided
part
switch.
Switch
transistors,
transistor
switch
turned
on
off
safety,
we
must
first
modulator,
amplifier
other
To
end,
boot
ensure
procedures.
small
inductor,
filter
capacitor.
Moment
boot,
capacitor
lot
surge
current
several
times
than
normal
current.
Such
may
contact
general
relay
melting,
fuse.
damage
shorten
life
span
premature
damage.
access
limiting
resistor,
resistor
charging.
excessive
consumption,
thus
affecting
regulator,
transient
process
after
short
period
then
automatically
relays
directly
This
called
"
soft
start"
Switching
logic
components
op-amp
auxiliary
boot.
Normal
is:
power,
procedures
→
R
C
charge
modulation
circuit,
short-circuit
stability
regulator.
In
machines
just
because
output
capacitance,
charge
rated
value
need
certain
time.
During
time,
sampling
with
low
sampling,
closed-loop
regulation
force
conduction
time
lengthened,
so
that
during
tend
continuous
conduction,
easily
requirements
paragraph
base
drive
signal
pulse
width
modulation,
guarantee
by
cut-off
switches
becoming
state,
setting
up
tie
start.
D、Over-current
When
short-circuit,
overload
fai