Hi Team,
A customer uses CC113L in their RF solution. The CC113L was laid on a small plug-in board[which was powered with a non-isolated power board through LDO] together with the microcontroller.
They tested multiple prototypes, CC113L had two issues in EFT test:
1.Software crashed: EFT high voltage 4000V test, during the initial test or when the voltage was reversed, the software would stuck into an infinite loop, all the keys and the RF TX were fail. The chip could be restored to normal via reset, the RF tx distance was not significantly shorten.
2.RF chip destruction: Started the EFT test from a low voltage to 4000V, it could pass it. However they found the RF TX distance was significantly shortened. Replace a new CC113L could make the range back to normal. As to the destroyed ones, the distance could not restore in subsequent test.
For hardware: They already have someone checked the schematic and the PCB layout, no problem was found. They tried add ESD protection but was still no efficient.
For software: Most of the prototypes got stuck in EFT test, it was caused by fail RF calibration in EFT, which led the chip enter dead loop and could not open normally.
Please check their hardware and software information:
Power bottom plate:电源底板.pdf
RF module:射频模块.PDF
RF module PCB:
Software setting: