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The output of IR2104 is not square wave, Ho and Lo are not square wave. When Ho is high, then Lo is also high.

Sajiwo

Feb 17, 2023
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The output of IR2104 is not square wave, Ho and Lo are not square wave. When Ho is high (yellow in osiloskop), then Lo is also high (blue in osiloskop). How to fix it?
 

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Harald Kapp

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Show us a schematic of your circuit, where your probes are attached and a clear front view of the scope display, please.
 

Alec_t

Jul 7, 2015
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What are your Vcc and Vin voltages for the IC?
 

Sajiwo

Feb 17, 2023
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thanks for your response, I've found a square wave with the IC, but I found a new problem. The IR2104 output of the HO and LO pins is damaged to form the opposite pwm wave, as shown below.
Screenshot_20230519_003556.jpg then, the resulting pwm voltage value is only about 1 volt, I measure it from the mosfet output (mosfet source pin 1 or mosfet drain pin 2 to the ground), as shown here.


Screenshot_20230519_004302.jpg
my schematic is shown in the image belowIMG-20230520-WA0004.jpg
I use the esp32 to produce PWM at 26kHz and trigger the SD pin always HIGH. Then, I used a 12V lead acid battery to power the 12V, as shown in the schematic. all the ground pins I put everything together. I want to build an MPPT system with half bridge on a synchronous buck converter. What is the solution so that the PWM HO and LO signals can contradict each other?
 

Delta Prime

Jul 29, 2020
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Where are the scope probes that came with the scope?
The waveform looks as if the scope probes are not compensated.
I use the esp32 to produce PWM at 26kHz and trigger the SD pin always HIGH
Question? Are you using alligator clips at that frequency for scope probes.?
 

Sajiwo

Feb 17, 2023
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Di mana probe ruang lingkup yang disertakan dengan ruang lingkup?
Bentuk gelombang tampak seolah-olah probe ruang lingkup tidak dikompensasi.

Pertanyaan? Apakah Anda menggunakan klip buaya pada frekuensi itu untuk probe ruang lingkup.?
Saya menggunakan lingkup probe osiloskop built-in
 

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Delta Prime

Jul 29, 2020
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Show a photo of where exactly you're taking your measurements please thank you
The scope probes do not look built-in. But then again I've never seen built-in probes
 

Sajiwo

Feb 17, 2023
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Tunjukkan foto di mana tepatnya Anda melakukan pengukuran, terima kasih
Probe lingkup tidak terlihat built-in. Tapi sekali lagi saya belum pernah melihat probe bawaan
thank you for your response, maybe tomorrow I will show you, because the laboratory is currently closed
 

Delta Prime

Jul 29, 2020
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thank you for your response, maybe tomorrow I will show you, because the laboratory is currently closed
Welcome to Maker Pro.
Thank you for your patience, because there seems to be a very large language barrier and/or translation.
 

Sajiwo

Feb 17, 2023
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sir, here I am taking measurements using an oscilloscope probe (Ho and Lo):
IMG_20230522_181248.jpgIMG_20230522_181258.jpg
Half bridge Output:
IMG_20230522_181025.jpg
 
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