Timeline for Class-d Amplifier board not working after capacitor is placed in parallel at dc input while running
Current License: CC BY-SA 4.0
14 events
| when toggle format | what | by | license | comment | |
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| Aug 11, 2023 at 12:13 | comment | added | Warriorrev6300 | 22.8V now but I use a adapter which charges it only upto 24V. I used it for more than 9 months and had no problems until I placed capacitor at dc input while the amp is running😐 | |
| Aug 11, 2023 at 12:08 | comment | added | winny | What measured voltage was your "24 V" battery at? The TPA3110 is only rated to 26 V so you are dangerously close to the limit. | |
| Aug 11, 2023 at 11:30 | comment | added | Warriorrev6300 | And D1 diode is reducing 0.2V at its output. | |
| Aug 11, 2023 at 11:21 | comment | added | Warriorrev6300 | The led is not working and when I measured the voltage across it, its same as input voltage which shouldn't be. SD and FAULT pins are shorted in this amplifier circuit and connected to 100k ohm resistor in series to +ve. And the led has 10k ohm resistor to its led input. | |
| Aug 11, 2023 at 11:15 | comment | added | Rohat Kılıç | Do you see if the LED lights up when the supply is applied? If it doesn't then 1) The input of the IC causes some problems so kills the supply rail, you may want to measure the supply voltage when it's applied to the board or 2) the series diode (D1) is dead (although 99.9% of the diodes go short when they are dead). Also some models have on-board FAULT LED which is tied to SD/FAULT pins. Apparently yours doesn't. You may want to check if somehow one of the outputs went short. | |
| Aug 11, 2023 at 11:08 | comment | added | Warriorrev6300 | I tried but didn't work. | |
| Aug 11, 2023 at 11:05 | comment | added | Rohat Kılıç | Have you tried with a different power supply? | |
| Aug 11, 2023 at 11:03 | history | edited | Rohat Kılıç | CC BY-SA 4.0 |
added 41 characters in body
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| Aug 11, 2023 at 11:03 | comment | added | Warriorrev6300 | The BMS had no issues after that but the amplifier didn't work. | |
| Aug 11, 2023 at 11:00 | comment | added | winny | Hopefully you just sinked the voltage rail below undervoltage lockout of the amplifier when the surge current into the capacitor caused voltage drop and/or tripped your BMS. | |
| Aug 11, 2023 at 10:55 | history | edited | Warriorrev6300 | CC BY-SA 4.0 |
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| Aug 11, 2023 at 10:51 | comment | added | Warriorrev6300 | Oh sorry, I connected the capacitor in parallel to 24V output of the BMS. | |
| Aug 11, 2023 at 10:20 | comment | added | Simon Fitch | What do you mean by "placed a 35V 4700uF capacitor"? Did you connect it across an output (between L+ and L- for example), or across the battery input (between GND and VCC) or something else? Was it being fed with an audio input signal at the moment you connected the capacitor? | |
| Aug 11, 2023 at 10:08 | history | asked | Warriorrev6300 | CC BY-SA 4.0 |