Clock & timing

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SE556: SE556 or similar timer based PWM generator

Zeng.

Prodigy 90 points

Part Number: SE556
Other Parts Discussed in Thread: TLC555-Q1

Tool/software:

Hello

I'm wondering what's the best way to build a PWM generator (that modulates an AC signal into PWM waveform) using one of the TI timers? I need PWM frequency to be 1Mhz or even slightly higher. There's also a requirement for pulse width error, that I don't think feasible when the design based on a timer, so I'd say that I need it to be as low as possible.

Thanks

0 Alex Curtis 8 months ago

TI__Intellectual 2160 points

Hi Zeng,

I recommend using the TLC3555-Q1 instead of the SE556 for this application considering your intended operating frequency of 1MHz or higher.

For information on building a PWM generator, see the 7.2.2 Pulse-Width Modulation section of the TLC555-Q1 datasheet. Additionally, this FAQ post may also be helpful: [FAQ] How do I design a pulse width modulator (PWM) circuit using LMC555, TLC555, LM555, NA555, NE555, SA555, or SE555? - Clock & timing forum - Clock & timing - TI E2E support forums

Let me know if you have any questions.

Best Regards,

Alex Curtis