Hello Support,
We are currently using the LMZ14203H to convert a +32V DC input into an 18V DC output. Our +32V bus maintains a steady state within a range of +/- 3%, although in emergency situations, it has the potential to drop as low as 20V in 30ms.
Our aim is to determine the minimum input voltage required to ensure normal operation in emmergency cases, as outlined in the application note: "Understanding Output Voltage Limitations of DC/DC Buck Converters." However, some crucial parameters missing in the datasheet:
- Specifications for resistors on both high-side and low-side switches, as well as for the inductor.
- Duty cycle limits.
Although we've conducted a Webench Electrical Simulation, we've encountered limitations. The tool executes an input step, causing the voltage to drop from 32V to 20V with a high dv/dt, which does not accurately reflect our operating conditions.
We will conduct tests on one unit and inquire whether it is representative for all samples ?
In addition does the TINA TI Model is representative is these conditions ?
Your guidance on resolving these uncertainties would be greatly appreciated.
Best regards,
CD.