Design tool
CIRCUIT060010
PWM generator circuit
CIRCUIT060010
Overview
This circuit utilizes a triangle wave generator and comparator to generate a 500 kHz pulse-width modulated (PWM) waveform with a duty cycle that is inversely proportional to the input voltage. An op amp and comparator generate a triangle waveform which is applied to the inverting input of a second comparator. The input voltage is applied to the non-inverting input of this second comparator. By comparing the input waveform to the triangle wave, a PWM waveform is produced. The second comparator is placed in the feedback loop of an error amplifier to improve the accuracy and linearity of the output waveform.
Features
- 5V Single supply with half-supply reference
- Input: -2V to 2V
- Output: 0V to 5V
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Downloads
Supported products & hardware
General-purpose op amps
Boost converters (integrated switch)
Comparators
High-speed op amps (GBW ≥ 50 MHz)
Technical documentation
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| Type | Title | Date | ||
|---|---|---|---|---|
| * | Circuit design | PWM generator circuit (Rev. A) | 01 Feb 2019 | |
| E-book | Analog Engineer’s Circuit Cookbook: Amplifiers (Rev. B) | 05 Oct 2022 | ||
| E-book | Analog Engineer’s Circuit Cookbook: Amplifiers (Rev. A) | 18 Feb 2019 | ||
| User guide | TIPD108 Verified Design Reference Guide | 19 Sep 2013 |
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