Schematic Design Review
2:07
Accessing knowledge base.
Looking for "reverse current blocking from battery to input or system path" in MCP73871-Data-Sheet-20002090E.pdf
Looking for "power path management system load sharing ideal diode reverse current" in MCP73871-Data-Sheet-20002090E.pdf
Looking for "backflow protection description IN to BAT or SYS to IN" in MCP73871-Data-Sheet-20002090E.pdf
Looking for "USB host back-powering prevention or reverse current to adapter" in MCP73871-Data-Sheet-20002090E.pdf
Looking for "Electrical Characteristics reverse leakage currents between pins IN, BAT, OUT" in MCP73871-Data-Sheet-20002090E.pdf
Looking for "Functional description of OUT pin and system power path" in MCP73871-Data-Sheet-20002090E.pdf
Looking for "Protection features: reverse discharge protection, power source selection" in MCP73871-Data-Sheet-20002090E.pdf
Verifying reverse current protection.
Answering backflow protection.
Clarifying circuit details.
Finalizing the MCP73871 response.
Crafting a concise response.
- Reverse‑blocking protection on input: “provides protection from a faulted or shorted input,” preventing the battery from discharging into the input through internal body diodes (Section 6.1.1.4 Reverse‑Blocking Protection).
- Reverse discharge limits:
- UVLO: “battery reverse discharge current is less than 2 μA.”
- Electrical characteristics (Output reverse leakage current, IDISCHARGE): 30–40 μA in Shutdown (various conditions); −6 to −13 μA at Charge Complete.
- Power‑path with ideal‑diode operation: Low‑loss power‑path management; when input current is insufficient, the ideal‑diode allows the battery to supplement the system load (this is intended behavior, not a backflow fault).
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