PT8A2717 Datasheet | Pericom Semiconductor

Features - 2-3 cells, Ni Cd or Ni MH 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. Technology Highlights - Employing 5 major charging states: cool-down / pre-charge / fast charge / trickle charge / stop charge, taking the best care for different battery conditions, especially for aged or dry batteries - Excellent battery protection and full-charge detection schemes - Negative delta voltage detection (-ΔV) with precision of +/-1m V step - Maximum battery voltage detection to turn to maintenance - Rate of change of temperature detection (d T/dt) best for Ni MH batteries full-charge termination (use with NTC) - Abnormal high battery temperature (55C) detection to stop charging (use with NTC) - Flexible...