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TPS562211EVM: When Vin<6.45V, Ven<1.12V，the EVM will shutdown.

Jason Cao
Prodigy 140 points
Part Number: TPS562211EVM

Vin‘s range is 4.2V-18V,This R1 R2 causes the circuit to shut down when the input is less than 6.45V.

Why choose such a resistance value for the R1,R2?