Voltage and current monitoring and control on the Zynq UltraScale+ MPSoC ZCU104 Evaluation Kit and Zynq UltraScale+ RFSoC ZCU111 Evaluation Kit are available on the power rails provided by the Infineon IRPS5401 power controllers.
Infineon have released information regarding the drive signal of the IRPS5401 device which impacts users of the ZCU104 and ZCU111 kits.
This design advisory outlines the information released and the action, if any, that should be taken by customers.
The ZCU104 and ZCU111 Evaluation Kits use a PMBus power system from Infineon.
Part of this system involves communication between the Infineon IRPS5401 PMIC and the Infineon TDA21240 multichip module.
On the ZCU104 and the ZCU111, there is a PWM signal interface between IRPS5401 and TDS21240.
For customers that are using the ZCU104 or ZCU111 as evaluation kits, no further action is required.
For customers that use the power solution on the ZCU104 or ZCU111 as a reference when designing the power solution for their customer board, the following is advised:
If using the IRPS5401 and TDA21240 in a custom power solution, a resistor and Zener clamp must be added to the PWM output of the PMIC (IRPS5401).
This layout modification is required to clamp the IRPS5401 5V PWM_A signal:
For production designs, the circuit change outlined above is a requirement.
Infineon have committed to updating documentation to correct the PWM voltage level and to include the voltage clamp circuit when using power stages limited to 3.3V PWM.
|Boards & Kits||