Part Number: TPS3851
Hi Team,
Could you please review schematic of TPS3851H33EDRBR.
Below is the schematic of TPS3851H33EDRBR, I think the circuit is ok, but I am not very sure.
Hi Jason,
Yes I can still see the other E2E question.
The "@" symbol means there is no component on the circuit. so the Pin 8 is tied the 10k resistor to ground.
When you say the Pin 8 is tied the 10k resistor to ground, I assume you mean that Pin 5 is tied to the 10k resistor to ground, and as long as the M_WATCHDOG_EN signal is strong enough to pull this node up, then the watchdog will be able to turn on.
If my customer want to tick between 10-20 seconds, how should they do to tune this value? change the value of capacitor?
Yes the value of the capacitor connected to CWD controls this value in accordance with this equation from the datasheet:
Jake
Hi Jake,
Could you also tell me what the difference between standard timing WDT and extended timing WDT,
the total time is standard timing WDT plus extended timing WDT?
My customer uses 1000nF to calculate, the result is 89.07s > 10~20s. but you said the value is lower, so I am confused about that.
could you give me an example?
Jason
Hi Jason,
The difference between standard timing WDT and extended timing WDT has to do with which OPN the customer is using.
The part listed is the TPS3851H33EDRBR device.
In the datasheet on page 23, there is table 11-1 which shows the nomenclature of the device:
At the bottom there is the 'z' entry for nominal watchdog timeout period showing that for 'E' variants, the extended equation applies.
Jake
