FH3016FDY

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 operating 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 high, turning on the external charge control N-MOS transistor Q1 and discharge control N-MOS transistor Q2, respectively. This allows both battery charging via a charger and battery discharging 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, switching Q1/Q2 from on to off and 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, switching Q1/Q2 from off to on and returning to normal operation. FH3016 incorporates a programmable delay time for each protection/recovery condition. Protection or recovery is only activated after the corresponding condition persists beyond the specified delay time. If the condition clears before the delay expires, the protection/recovery state will not be entered.

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