Professional English Translation

Jun 08, 2026

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No Output: No load response, very low or zero output voltage. Common causes: undervoltage cells, damaged MOSFET, blown FUSE, broken PCB trace.
Failure to Charge: Cannot charge or stops charging prematurely. Common causes: overcharge protection not reset, charger mismatch, poor cell voltage consistency.
Unable to Drive Load: Normal open-circuit voltage but power cuts off under load. Common causes: increased discharge MOSFET on‑resistance, overcurrent threshold too low.
MOSFET Burnout During Short Circuit Protection: MOSFET fails while executing short circuit protection. Common causes: high voltage from parasitic inductance, excessive turn-off loss.
Short Circuit Protection Failure: No protection activation during short. Common causes: faulty sense resistor, IC‑MOSFET mismatch, excessive IC internal delay.
No Auto‑Recovery After Short: Remains locked after short is removed. Common causes: IC lacks auto‑recovery, leakage at output terminals, load not fully disconnected.
Significantly Increased Internal Resistance: Severe voltage drop under discharge. Common causes: aged FUSE/PTC, increased MOSFET on‑resistance, micro‑cracks in PCB vias.
Temperature Protection Failure: No power cut at high temperature or no charge limit at low temperature. Common causes: NTC resistance drift, poor contact in sampling circuit, improper sensor placement.
Complete Board Unresponsiveness: No current in or out. Common causes: power supply line disconnected, total battery voltage below IC startup threshold, permanent lockout due to deep over‑discharge.

Professional English Translation

No Output: No load response, very low or zero output voltage. Common causes: undervoltage cells, damaged MOSFET, blown FUSE, broken PCB trace.

Failure to Charge: Cannot charge or stops charging prematurely. Common causes: overcharge protection not reset, charger mismatch, poor cell voltage consistency.

Unable to Drive Load: Normal open-circuit voltage but power cuts off under load. Common causes: increased discharge MOSFET on‑resistance, overcurrent threshold too low.

MOSFET Burnout During Short Circuit Protection: MOSFET fails while executing short circuit protection. Common causes: high voltage from parasitic inductance, excessive turn-off loss.

Short Circuit Protection Failure: No protection activation during short. Common causes: faulty sense resistor, IC‑MOSFET mismatch, excessive IC internal delay.

No Auto‑Recovery After Short: Remains locked after short is removed. Common causes: IC lacks auto‑recovery, leakage at output terminals, load not fully disconnected.

Significantly Increased Internal Resistance: Severe voltage drop under discharge. Common causes: aged FUSE/PTC, increased MOSFET on‑resistance, micro‑cracks in PCB vias.

Temperature Protection Failure: No power cut at high temperature or no charge limit at low temperature. Common causes: NTC resistance drift, poor contact in sampling circuit, improper sensor placement.

Complete Board Unresponsiveness: No current in or out. Common causes: power supply line disconnected, total battery voltage below IC startup threshold, permanent lockout due to deep over‑discharge.

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