Description

The AP9221 is a single chip protection solution specially designed for 1-cell Li+ rechargeable battery pack application. The AP9221 includes a 1-cell Lithium ion battery protection chip and dual N-CH MOSFET with common drain. The AP9221 provides rich battery protection features and can turn-off the N-CH MOSFET by detecting overcharge voltage/current, over discharge voltage/current, or load short circuit. The AP9221 has builtin fixed delay time to save external components. The AP9221 is available in the U-DFN2030-6 (Type C) package.

Application(s)

• Li+ Rechargeable Battery Pack

Feature(s)

• High Voltage CMOS Process, up to 24V (VDD to VM)
• Low Quiescent Current (+25°C)
  • In Normal Mode, 3.0μA (Typ.), 4.5μA (Max.) VDD = 3.5V
  • In Power-Down Mode, 0.1μA (Max.)
• High-Accuracy Voltage Detection Circuit (+25°C)
  • Overcharge Detection Voltage: 3.5V to 4.5V (5mV Steps) Accuracy-15mV, +25mV
  • Overcharge Hysteresis Voltage Range: 0.1V to 0.4V (50mV Steps) Accuracy ±50mV
  • Overdischarge Detection Voltage: 2.0V to 3.4V (10mV Steps) Accuracy ±35mV
  • Overdischarge Hysteresis Voltage Range: 0V to 0.7V (40mV Steps) Accuracy ±65mV
  • Discharge Overcurrent Detection Voltage: 0.025V to 0.2V (10mV Steps) Accuracy ±12mV
  • Short Current Detection Voltage: 0.12V to 0.45V (50mV Steps) Accuracy ±50mV
  • Charge Overcurrent Detection Voltage: -0.2V to -0.025V (10mV Steps) Accuracy ±12mV
  • Overcharger Detection Voltage: 8.0V (Fixed) Accuracy ±2V
  • Overcharger Release Voltage: 7.3V (Fixed) Accuracy ±2V
• Built-In Fixed Detection Delay Time (+25°C), Accuracy ±20%
• Power-Down Mode Selectable (Yes or No)
• 0V Battery Charge Selectable (Permission or Inhibition)
• Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
• Halogen and Antimony Free. “Green” Device (Note 3)