Analog PWM Generator 5V, 500kHz PWM Output

(ACTIVE) TIPD108

Description & Features

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Key Document

Description

This Verified 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. An op amp and comparator generate a triangular waveform which is passed to one input of a comparator. By passing the input voltage to the other comparator input, a PWM waveform is produced. Negative feedback of the PWM waveform to an error amplifier is utilized to ensure high accuracy and linearity of the output. The OPA2365 op amp, TLV3502 comparator, and REF3325 reference were used to build this design. See more TI Precision Designs

Features
  • Utilizes a triangle wave generator and comparator to generate PWM waveform
  • Single-Supply Solution
  • -2V to 2V input, DC coupled
  • 5V, 500kHz PWM output
  • 0.22% Measured Gain Error
  • 0.108% Measured Offset Error
  •  

      This Verified Design Includes:

    • Theory
    • Component Selection
    • TINA-TI Simulation
    • Schematics and PCB Layout
    • Verification and Measured Performance
    • Modification Options
  •  


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Schematic/Block Diagram

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Test Data

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Design Files

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Bill of Materials (BOM)

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TI Devices (3)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
OPA2365  2.2V, 50MHz, Low-Noise Single-Supply Rail-to-Rail Operational Amplifiers  Operational amplifiers (op amps)  Sample & Buy View Design Kits & Evaluation Modules
REF3325  30ppm/°C Drift, 3.9µA, SOT23-3, SC70-3, UQFN-8 Voltage Reference  Voltage references  Sample & Buy Not Available
TLV3502  4.5ns Rail-to-Rail Comparator  Amplifiers  Sample & Buy Not Available

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
OPA2365 Download Download
REF3325 Download Download
Download -
Download Download
TLV3502 Download Download
Download -

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Technical Documents

View the Important Notice for TI Designs covering authorized use, intellectual property matters and disclaimers.

User guides (1)
Title Abstract Type Size (KB) Date Views TI Recommends
PDF 806 19 Sep 2013 0
Design files (3)
Title Abstract Type Size (KB) Date Views
PDF 61 20 Sep 2013 0
ZIP 795 19 Sep 2013 0
PDF 89 19 Sep 2013 0
Related Tools & Software

Development Tools (1)

Name Part Number Tool Type
SPICE-based analog simulation program  TINA-TI  Circuit Design & Simulation 

Software (2)



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