FH3016AAL

The FH3016 series is a high-precision overcharge and overdischarge protection circuit for single-cell rechargeable lithium batteries, integrating high-precision overcharge protection, overdischarge protection, overcurrent charge protection, and overcurrent discharge protection. Under normal conditions, the VDD pin voltage of FH3016 is between the overcharge protection threshold (VOC) and the overdischarge protection threshold (VOD), and the VM detection pin voltage is between the overcurrent charge detection voltage (〈VECI〉) and the overcurrent discharge protection threshold (VEDI). In this state, both the COUT and DOUT pins output a high level, turning on the external charge control N-MOS transistor Q1 and discharge control N-MOS transistor Q2, respectively. This allows the battery to be charged via a charger or discharged through a load. FH3016 performs overcharge/overdischarge protection by monitoring the VDD or VM pin voltage (relative to VSS). When a charge/discharge protection condition occurs, COUT/DOUT transitions from high to low, turning Q1/Q2 from on to off, thereby halting the charge/discharge process. FH3016 has corresponding recovery conditions for each protection state. Once the recovery condition is met, COUT/DOUT transitions from low to high, turning Q1/Q2 from off to on, returning the circuit to normal operation. FH3016 applies a defined delay time to each protection/recovery condition. A protection/recovery action is only triggered after the corresponding condition persists for the specified delay period. If the protection/recovery condition clears before the delay expires, the protection/recovery state is not entered.

Applications

• Charge/discharge protection circuits for lithium batteries
• Other high-precision protection ICs for lithium batteries

Key features

• Ideal protection circuit for single-cell Li-ion or Li-polymer batteries
• High-accuracy overcharge protection detection (±20mV)
• High-accuracy overdischarge overcurrent protection detection (±10mV)
• Battery short-circuit protection
• Multiple selectable detection voltage and delay time options
• Selectable auto-recovery or auto-recovery inhibit under overdischarge condition
• Selectable 0V battery charge enable/disable function across different models
• Minimal external components
• Low quiescent current (typical: 2.5uA)
• Compact SOT23-6 package
• ESD passes Human Body Model (HBM): 8KV