TL494 DC DC Boost (Step Up) Converter SMPS Circuit 12V to 100Volts

TL494 DC to DC Boost (Step Up) Converter SMPS Circuit Diagram

TL494 DC DC Boost (Step Up) Converter SMPS Circuit 12V to 100Volts electrobuff.blogspot.com

Hi. In today's video tutorial I'll show you how to make a compact and reliable DC DC BOOST CONVERTER based on the TL494 PWM IC. It accepts an input from 10V to 15V and provides a continuous adjustable Output from 12V to 100V. The feasible power is about 150W. The switching Frequency is set to 100kHz for good performance. I Hope you LIKE this video, and don't forget to SHARE and SUBSCRIBE for more amazing stuff!
Link to Circuit Diagram can be Found Here: https://drive.google.com/open?id=1up1Zw2lmdWB5OXrCNeAjBjvnUCayiDy4
Watch my YouTube Video Tutorial

https://youtu.be/Hewly1foD64?si=hCRSPZ5jyvjgTjTW

TL494 DC to DC Boost (Step Up) Converter SMPS Circuit Images:

TL494 DC DC Boost (Step Up) Converter SMPS Circuit 12V to 100Volts electrobuff.blogspot.com

DC DC Boost (Step Up) Converter SMPS Circuit electrobuff.blogspot.com

frequency calculation for DC DC Boost (Step Up) Converter SMPS Circuit electrobuff.blogspot.com

TL494 pwm ic frequency formula electrobuff.blogspot.com

TL494 DC DC Boost (Step Up) Converter SMPS Circuit 12V to 100Volts electrobuff.blogspot.com

TL494 DC DC Boost (Step Up) Converter SMPS Circuit voltage feedback regulation electrobuff.blogspot.com

TL494 DC DC Boost (Step Up) Converter SMPS Circuit 12V to 100Volts electrobuff.blogspot.com

TL494 Current-Mode PWM Controller IC Explained: Pinout, Equivalent, Sample Circuits, Applications, Features

TL494 PWM IC Pinout DIP Package electrobuff.blogspot.com

TL494 Current-Mode PWM Controller

TL494 Pinout

The TL494 IC is a fixed frequency current-mode PWM controller IC with all the functions that are required in the construction of the pulse-width modulation (PWM) control circuit on a single chip.

TL3843 Pinout Configuration

Pin Number	Pin Name	Description
1	1IN+	Noninverting input to error amplifier 1
2	1IN-	Inverting input to error amplifier 1
3	FEEDBACK	Input pin for feedback
4	DTC	Dead-time control comparator input
5	CT	Capacitor terminal used to set the oscillator frequency
6	RT	Resistor terminal used to set the oscillator frequency
7	GND	Ground Pin
8	C1	The collector terminal of BJT output 1
9	E1	The emitter terminal of BJT output 1
10	E2	The emitter terminal of BJT output 2
11	C2	The collector terminal of BJT output 2
12	VCC	Positive Supply
13	OUTPUT CTRL	Selects single-ended/parallel output or push-pull operation
14	REF	The 5-V reference regulator output
15	2IN-	Inverting input to error amplifier 2
16	2IN+	Noninverting input to error amplifier 2

TL494 Specifications & Features

Supply Voltage: 7V to 40V
Number of Outputs: 2 Output
Switching Frequency: 300 kHz
Duty Cycle - Max: 45 %
Output Voltage: 40 V
Output Current: 200 mA
Fall Time: 40 ns
Rise Time: 100 ns
Available in 16-pin PDIP, TSSOP, SOIC and SOP Packages

Equivalent/Substitute for TL494: UC3843, TL3842

Alternatives PWM controller IC: UC2842, SG2524

Where to use the TL494 PWM Controller IC

The TL494 fixed frequency PWM Controller can be used for DC to DC conversion regardless of buck or boost topology. TL494 can be used to provide a constant current by varying the output voltage to the load. This IC feature an output control circuit, a flip flop, a dead time comparator, two different error amplifiers, a 5V reference voltage, an oscillator, and a PWM comparator.

So if you are looking for an IC to produce PWM signals for controlling a power switch based on the current flowing through the circuit, then this IC might be the right choice for you.

How to use TL494 IC

A test circuit from the TL494 datasheet is shown below.

TL494 PWM IC Circuit Application and Pinout electrobuff.blogspot.com

Non inverting pins are connected to the Ref pin while inverting pins are connected to the ground. Test inputs are given to DTC and FEEDBACK pins. External capacitor and resistor are connected to pin 5 & 6 to control the oscillator frequency. The error amplifier compares a sample of the 5-V output to the reference and adjusts the PWM to maintain a constant output current

Applications of TL494

Desktop PCs
Microwave Ovens
Server PSUs
Solar Micro-Inverters
Washing Machines: Low-End and High-End
E-Bikes
Power: Telecom/Server AC/DC Supplies:
Smoke Detectors
Solar Power Inverters

2D-Model of TL494

Dimensions for TL3494 IC is given below. These dimensions are for the PDSO package. If you are using a different package IC, please refer to the TL494 datasheet.