Additional PWM pins

Hi, so the Pixhawk 2.1 has 14 PWM pins. I’m working on a project where I need more pwm pins than I have. Is there a way to add additional pins. I saw something about a pca9625 board that connects to i2c for pwm control. Not sure how it would work tho. Would I be able to manually activate a servo from that? I’m just not sure. Thanks for any help!

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