I am in the early design stages of a Battery Management System and we are considering MP2797 as our AFE chip. However, there is some information in the datasheet that is not clear to me:
- “Drives up to 100A DC with Parallel N-Channel MOSFETs”. Is this not a limitation of external FETs rather than AFE?
- DSG gate drive is given with a Typical value of 10V, yet Charge Pump Output Voltage as 14.7V. Does the charge pump not generated the DSG gate voltage? If so, where does the voltage difference come from?
- How many FETs can be driven by DSH and CHG pins? How does the VCP capacitor increase relate to this number?
- What is the power consumption in Active mode? Only Shutdown and Safe State supply current values are given.
- Can this chip support high-side (positive) current sensor measurements?
- How are external FETs driven for balancing? Does cell voltage drive FET gate?