Please recommend a MOSFET replacement in the audio circuit (Thingy52).

[Harry Kim]

- The product I am making uses nRF52833. In addition, the audio part of Thingy 52 was added to the product as above. (The speaker uses 1.5W, 8ohm. Current consumption is about 200mA.)
- However, in the circuit above, the DMC2400UV is not in good supply, so we are going to replace it with another part. So, I tested Toshiba's SSM6L14FE (TE85L,F), but there was a problem with the speaker volume being lower than the DMC2400UV.
- It is presumed that the switching speed of SSM6L14FE(TE85L,F) is slower than that of DMC2400UV.
- Are there any other parts that you would recommend? Or, do you have any advice on this?

DMC2400UV SSM6L14FE Datasheet

Thanks. 

[JONATHAN LL]

Hi,

I dont have any alternative components so you might have too do som digging to find a MOSFET that matches the specs of the DMC2400UV. 

t is presumed that the switching speed of SSM6L14FE(TE85L,F) is slower than that of DMC2400UV.

This could be a factor that effects the result but difficult to say exactly. 

What diodes are you using? 

but there was a problem with the speaker volume being lower

Big difference in volume?


Regards,
Jonathan

[Harry Kim]

Thanks for the reply.

- The diode is BZT52C2V4T (Diodes Incorporated).

- If the volume size of dmc2400 is 10, the volume of SSM6L14FE(TE85L,F) is about 6-7.

[JONATHAN LL]

Cant find any alternative list of MOSFETs that we where looking in to using, it quite some time ago so i asked the original engineer designing the circuit.
One thing that might also impact the result it the threshold voltage for gate source, VGS_th as well as timing. Difficult to say what is the cause of the volume drop. 

But unfortunately dont think i can be of more help.