Tool/software:
Dear Texas Instruments Support Team,
I am working on the design of a Power Conditioning and Distribution Unit (PCDU) for a nanosatellite project and considering the replacement of two components, the LTC4231 and LTC4365, with the LM5069 to fulfill two distinct functions:
- Latching Current Limiter (LCL): Used for managing power distribution to various loads.
- Kill-Switch Function: Enables and disables the unregulated bus voltage through MOSFETs based on undervoltage (UVP) and overvoltage (OVP) thresholds.
I have the following questions regarding the feasibility of this approach:
- Can the LM5069 replace the LTC4231 and LTC4365 for the above applications, particularly in the context of controlling external MOSFETs for the Kill-Switch function?
- For the LCL functionality, does the PGD pin (Pin 8) of the LM5069 reliably indicate the ON/OFF state of the distribution lines? If not, would you recommend another method or component to achieve this status feedback?
- Has the LM5069 been used in space applications before? If so, could you provide any relevant details?
- Considering our operational conditions:
- Input voltage (Vin): 22V to 34V
- Undervoltage protection (UVP): 18V to 20V
- Overvoltage protection (OVP): 36V to 39V
- Radiation tolerance: 15krad total dose
Would you recommend the LM5069 for this application? If not, what kind of testing would you suggest to qualify it for space use?
Your insights into these questions would greatly assist in evaluating the suitability of the LM5069 for our design.
Thank you for your support, and I look forward to your response.
Best regards,
TALL Mouhameth
Architect System Engineer at EREMS
