FH3016FDM

The FH3016 series is a high-precision overcharge and overdischarge protection circuit for single-cell rechargeable lithium batteries, integrating overcharge protection, overdischarge protection, overcurrent charge protection, and overcurrent discharge protection. Under normal operating conditions, the VDD pin voltage of FH3016 falls between the overcharge protection threshold (VOC) and the overdischarge protection threshold (VOD), and the VM detection pin voltage falls between the overcurrent charge detection voltage (VECI) and the overcurrent discharge protection threshold (VEDI). In this state, both the COUT and DOUT pins output high, turning on the external charge control N-MOSFET Q1 and discharge control N-MOSFET 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 is triggered, COUT/DOUT transitions from high to low, turning off Q1/Q2 and halting the charge/discharge process. FH3016 defines corresponding recovery conditions for each protection state. Once the recovery condition is met, COUT/DOUT transitions from low to high, turning Q1/Q2 back on and returning the circuit to normal operation. FH3016 applies a specified delay time to each protection/recovery condition. Protection or recovery is only activated after the corresponding condition persists for the required delay period. If the condition clears before the delay expires, the protection/recovery state is not entered. The FH3016 series is a high-precision lithium battery protection circuit. During normal operation, if the battery is being charged, FH3016 may enter an overcharge protection state or an overcurrent charge protection state; once the corresponding conditions are met, it will return to normal operation. If the battery is being discharged, it may enter an overdischarge protection state or an overcurrent discharge protection state; similarly, it will return to normal operation once the recovery conditions are satisfied.

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 charging allow/inhibit function across different models
• Minimal external components
• Low quiescent current (typical: 2.5uA)
• Compact SOT23-6 package
• ESD withstand via Human Body Model (HBM): 8KV