Other Parts Discussed in Thread: TPS23758
I must admit, I'm feeling rather dumb this morning but I'm not understanding the choice of resistors for the EVM.
- The EVM is supposed to support 2.3A
- The EVM has two 0.91Ω resistors in parallel
- Rcs = Vcsmax / Ipk
- Vcsmx-max is 0.6V according to the TPS23758 datasheet
- Rcs = 0.6 / 2.3 = 0.26Ω
I assume the EVM used 2 resistors in parallel for better heat dissipation but two 0.91Ω in parallel is 0.46Ω which is almost double what my calculation says it should be.