Share:
SKU: 637720678436689251
Rs.90
Rs. 113
SG3525
/
KA3525
/
3525
PWM
CONTROLLER
IC
/
Oscillator.
The
SG3525A
series
of
pulse
width
modulator
integrated
circuits
are
designed
to
offer
improved
performance
and
lowered
external
parts
count
when
used
in
designing
all
types
of
switching
power
supplies.
The
on-chip
5.1
V
reference
is
trimmed
to
1
%
and
the
input
common-mode
range
of
the
error
amplifier
includes
the
reference
voltage
eliminating
external
resistors.
A
sync
input
to
the
oscillator
allows
multiple
units
to
be
slaved
or
a
single
unit
to
be
synchronized
to
an
external
system
clock.
A
single
resistor
between
the
CT
and
the
discharge
terminals
provide
a
wide
range
of
dead
time
adjustment.
These
devices
also
feature
built-in
soft-start
circuitry
with
only
an
external
timing
capacitor
required.
A
shutdown
terminal
controls
both
the
soft-start
circuity
and
the
output
stages,
providing
instantaneous
turn
off
through
the
PWM
latch
with
the
pulsed
shutdown,as
well
as
soft-start
recycle
with
longer
shutdown
commands.
These
functions
are
also
controlled
by
an
Undervoltage
lockout
which
keeps
the
outputs
off
and
the
soft-start
capacitor
discharged
for
sub-normal
input
voltages.
This
lockout
circuitry
includes
approximately
500
mV
of
hysteresis
for
jitter-free
operation.
Another
feature
of
these
PWM
circuits
is
a
latch
following
the
comparator.
Once
a
PWM
pulses
has
been
terminated
for
any
reason,the
outputs
will
remain
off
for
the
duration
of
the
period.
The
latch
is
reset
with
each
clock
pulse.
The
output
stages
are
totem-pole
designs
capable
of
sourcing
or
sinking
in
excess
of
200
mA.
The
SG3525A
output
stage
features
NOR
logic,
giving
a
LOW
output
for
an
OFF
state.
Key
