Request for Programming Guidance – ACT43750 with STM32 for QPA1003P PA Control

RF Solutions RF Power Amplifiers
1

I am currently working on integrating the QPA1003P GaN Power Amplifier with the ACT43750 drain-switch/gate-bias regulator IC, controlled by an STM32 microcontroller.

My setup includes:

  • QPA1003P PA (requiring strict bias sequencing and temperature monitoring)
  • ACT43750 IC (for gate bias, drain switching, and IDQ calibration)
  • STM32 controller (handling I²C/GPIO interface.
    I would like to request your guidance on the following points:
  1. Programming procedure: Recommended steps for controlling ACT43750 registers and pins to safely bias up and bias down the PA.
  2. Reference documents: Any application notes, programming guides, or design examples related to ACT43750 control.
  3. Sample code: Example firmware (in C or similar) for microcontroller integration with ACT43750 (I²C transactions, calibration routines, bias sequencing).

This information will help me ensure safe and reliable PA operation while integrating real‑time monitoring and Ethernet‑based reporting.

Thank you very much for your support. I look forward to your guidance.

Best regards,
Chaithanya

2

As you have requested a lot of information here I think that it would be best to contact your local Qorvo applications engineer. Please contact appsupport@qorvo.com stating your company name and location, and your enquiry will be forwarded to the best contact.