Description
   The PT8A2707-12/2717-19 integrates charger controller and fuel-gauge into a single-chip. It detects full-charge through -V, dT/dt, safety-timer and maximum battery voltage, and learns the battery capacity from each charging/discharging cycle. Since PT8A2707-12/2717-19 measures charge/discharge current to account for the battery capacity in/out respectively, the battery capacity can be accurately recorded and displayed in 6-level (10%/20%/40%/60%/80%/100%) LED or LCD pattern. The continuous-learning capability enables the devices to take care of battery aging effect so that the capacity level is always accurately displayed throughout the life-span of the battery pack. In the charging control, a DC/DC controller is regulated to regulate constant currents for pre-charge, fastcharge and trickle-charge conditions. 

Product Features
• 2-3 cells, NiCd or NiMH battery fast-charger controller for battery-embedded devices
• Precise 7-bit fuel-gauge-counter measures charging and discharging current through battery pack. Make it possible to accurately indicate battery capacity through LCD (PT8A2707-09/2717-19) or LEDs (PT8A2710-12).
• Integrated with a DC/DC step-down controller make it possible for customers to manufacture just one PCB module that can:
   ➢ Cover different product models that requires different charging current/speed by changing only one resistor;
   ➢ Work with different kinds of AC/DC adapters with wide input voltage ranges.
• Motor also can work in both corded or cordless conditions. When motor is used in cord-mode, the charging current to battery is regulated at a maximum value of 1/10 of the fast-charging current. The battery is just like being slowly-charged and prevented from being exposed to a prolonged high-current charging profile.
• Provide excellent charge and discharge protections.
• Available with different parts to cover products employing slide switch (PT8A2707/10/17), tact switch (PT8A2708/09/11/12/18/19) input to control motor ON/OFF. Two-step motor-speed control (70%, 100%) is also available in PT8A2708/2711/2718.
• Very low standby current of typical 20A. Products could typically work in standby-mode for a few months, depends on battery capacity.