justintec
Member
Hello everyone,
This is my first post, though I've lurked these boards for a few months now.
I'm designing a portable mic+pre powered off a 9V battery for field recording. I'm considering using a DC-DC charge pump converter in conjunction with a 9V battery to give me a full -9V to +9V voltage swing.
Here is the datasheet for the part I'm looking at:
http://ww1.microchip.com/downloads/en/DeviceDoc/21465b.pdf
National has a similar part, as perhaps others.
Has anybody had any experiences with parts like these? They use an internal oscillator that operates at 10 kHz, though they can be set up to run at a different frequency.
I'm hoping the a cap on the negative supply will absorb enough that the ripple is negligible.
Has anybody ever used a part like this or something similar it a power supply for audio equipment and had good (or bad) luck?
This is my first post, though I've lurked these boards for a few months now.
I'm designing a portable mic+pre powered off a 9V battery for field recording. I'm considering using a DC-DC charge pump converter in conjunction with a 9V battery to give me a full -9V to +9V voltage swing.
Here is the datasheet for the part I'm looking at:
http://ww1.microchip.com/downloads/en/DeviceDoc/21465b.pdf
National has a similar part, as perhaps others.
Has anybody had any experiences with parts like these? They use an internal oscillator that operates at 10 kHz, though they can be set up to run at a different frequency.
I'm hoping the a cap on the negative supply will absorb enough that the ripple is negligible.
Has anybody ever used a part like this or something similar it a power supply for audio equipment and had good (or bad) luck?