Introduction to uc3842

Hi friends welcome to new post. We will discuss the Introduction to uc3842. It is fix frequency mode pulse width modulation controller. Its common applications are dc to dc conversion circuits and off line circuits.

In this post, we will cover different features pinout applications and block diagrams of this component. So let get started Introduction to uc3842

Table of Contents

The ucx84x group of components consists of control integrated circuits that offer features that make to use in DC to dc fixed frequency current mode circuits where needed fewer components

The inner circuit of this module consists of undervoltes lockout offering start-up current value of less than one milliamperes.
With that, it also has logic to make sure latched operation PWM comparators for current limiting features.
It has a totem pole output stage which is used for sink and source of larger value peak current.
The output circuitry is good for operating the N channel MOSFETs is low in case of off state
The ucx84x series gives a different packaging temperature value highest duty cycle.
The modules that has a high value of turn on and turn off hysteresis are the finest option for off line power supply.
The modules UC184x are operated on the minus fifty-five to one twenty-five centigrade.

uc3842 Pinout

It comes in three packaging of pinout 8 pin, 16 and 20 pins. Here we will discuss eight-pin packaging
Pin 1 It is output pinout that gives less output impedance with the signal of one megahertz on the basis of differences among the set and current volts.

Pin 2 is used to give input to the error amplifier of the circuit. VOlts differences is given here
Pin 3 It is shunt resistant and used to observe the current in the circuitry and volts about it provided through feedback circuitry.
Pin 4 It has inner oscillator that can adjust through use of external resistance and a capacitor linked
Pin 5 is ground
Pin 6 is the output
Pin 7 is input supply
The pin is reference volts