TPS22810EVM: Application question (EN with PWM)

Roy Chou1

Part Number: TPS22810EVM

Tool/software:

Hi Team,

I expect that I can see the 12V output with PWM 50% at 220Hz. But the output waveform is weird. May you let me know why we can't get the output normally and how can we get the desired 50% duty Vout? Thank you.

In addition, when EN = Vin, I can get Vout = 12V DC.

Regards,
Roy

7 months ago

0 Amrit Jit 7 months ago

TI__Mastermind 32741 points

Hello Roy,

Load switches are for linear application which means it has weaker pull-up and pull-down current.

For more quicker VOUT discharge, you can connect load on VOUT.

Thanks

Amrit

0 Roy Chou1 7 months ago in reply to Amrit Jit

TI__Genius 16170 points

Hi Amrit,

Sorry that I'm not getting your point. For left image, there is no output discharge resistor. But why don't I get the PWM Vout, but 3.63V DC?

Regards,

Roy

+1 Roy Chou1 7 months ago in reply to Roy Chou1

TI__Genius 16170 points

Remove the CT to fix the issue.

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TPS22810EVM: Application question (EN with PWM)