elleny

Analog PWM generator, 5V 500kHz PWM output

TIPD108

Overview

This verification design utilizes a triangle wave generator and comparator to generate a pulse-width modulated (PWM) waveform with a duty cycle that is inversely proportional to the input voltage. The op amp and comparator generate a triangular waveform, which is then passed to one input of the comparator. By passing the input voltage to the other comparator inputs, a PWM waveform is generated. Negative feedback from the PWM waveform to the error amplifier is used to ensure high accuracy and linearity of the output. This design was constructed using the OPA2365 op amp, TLV3502 comparator, and REF3325 reference. Learn more about TI's high-precision designs

characteristic

● Use triangle wave generator and comparator to generate PWM waveform
● Single power supply solution
● -2V to 2V input, DC coupled
● 5V, 500kHz PWM output
● 0.22% measurement gain error
● 0.108% measurement bias error

This verification design includes:

● Principle
● Component selection
● TINA-TI simulation
● Schematic and PCB layout
● Verified and measured performance
● Modify options

Backlog Impt notice changes Backlog Impt notice changes end

Blockdiagram

Design Files

Documentation

Analog pulse width modulation

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Update:2025-07-01 14:14:20

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