Generating PWM AC voltage with negative swing below the GND?

[LinuxHata]

Hello.
I know, title is a bit misleading, but I simply don't know, which term applies to this correctly.

Situation is as follows:
I have +-5V supply "on board".
I need to generate square pulses at output, at low frequency (50-200hz), but output should also go negative related to ground pin - output should swing from -2.5V to +2.5V. Current up to 5A.

As far as I understand this, I need two mosfets, N and P channel, and have to drive them sequentially. For that I plan to use MCU with hardware PWM generator, with dead time and all bells and whistles.

However, while with N mosfet everything is simple, I can't figure out, how to deliver negative voltage at P mosfet gate, from the MCU, which runs from +5 volts.

Any ideas?

(no transformers at input or output, please)

[Andy Chee]

Series coupling capacitor? Negative gate voltage charge pump?

[johansen]

Find a high and low side gate driver with dead time, and an enable pin that can run on 10 volts (watch the undervoltage lock out level), and reference it to your -5v ground.

For the signal inputs, a 2k resistor to -5 volts keeps both gates off... but your mcu is at +5 relative to ground, which means you need to subtract 5 volts from its signals.. using a 5.1v zener.

you don't necessarily need an enable pin but you may want one that could be hardwired into a current sense resistor to turn the gates off.