Microcontroller

SG3525 / KA3525 PWM Controller IC

Condition: New
Availability: In Stock
Share:     Faceook Twitter

SKU: DBS175,LS30,TH5,KRT

Rs.50 Rs. 63
Description: class='font-size-24

mb-3'>SG3525

/

KA3525

/

3525

PWM

CONTROLLER

IC

/

Oscillator class='font-size-24

mb-3'>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

CTand

the

discharge

terminals

provide

a

wide

range

of

dead

time

ad-

justment.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

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

Features

DUAL

SOURCE/SINK

OUTPUT

DRIVERS LATCHING

PWM

TO

PREVENT

MULTIPLE

PULSES PULSE-BY-PULSE

SHUTDOWN INTERNAL

SOFT-START 8

TO

35

V

OPERATION 100

Hz

TO

500

KHz

OSCILLATOR

RANGE 5.1

V

REFERENCE

TRIMMED

TO

1

% ADJUSTABLE

DEADTIME

CONTROL INPUT

UNDERVOLTAGE

LOCKOUT

WITH

HYSTERESIS SEPARATE

OSCILLATOR

SYNC

TERMINAL class='font-size-24

mb-3'>INTERNAL

CIRCUIT

DIAGRAM

No Reviews Yet

0

overall

Add a review