Hi Team,
my customer would like to know what fault conditions are covered by the slaves and monitored via power good in the dual-channel automotive synchronous buck controller evaluation module LM5143-Q1EVM-2100.
Thank you,
Franz
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Hi Team,
my customer would like to know what fault conditions are covered by the slaves and monitored via power good in the dual-channel automotive synchronous buck controller evaluation module LM5143-Q1EVM-2100.
Thank you,
Franz
Hi Franz,
Each channel has its own power good (PG) indicator that monitors output UV, OV and OC events. It also pulls low during an IC overtemperature event.
Regards,
Tim
Hi Tim,
I'm the customer, thanks Franz for posting it.
Some further details: I have a multiphase 4ch single output interleaved design, realized as current source to drive laser diodes. Function is prooved, everything is fine, now I have to look at reliability and safety.
If one Controller (1 of 2) or channel (1 of 4) have a failure I have to power down the whole system. Thats why some questions, may be a yes/no answer….
1. Is "Power good" PG controlled only by the regulation voltage?
2. Is PG "hard wired" to the PWM Outputs (power bad --> Outputs off)?
3. What happens with the other channels if one channel is switched off?
4. Should I AND-wire all PG Outputs to shut down all if needed?
5. UV means UV of bias voltages and output voltage, UV of suppy voltage must be done via EN Input?
6. OV is OV of Output voltage
7. OC is clear.
8. every channel (slaves & master) monitors these failures, except output voltage?
9. finally, do you have an idea how to identify the source of the possible failure?
Thanks in advance
Frank
Frank,
The outputs are all connected together, each phase Master and Slave measure there individual phase currents. If there is an overcurrent each phase will detect it, and the controllers will go into hiccup model overload protection.
Terry