Product Overview of ChipSourceTek-CST5090
    This intelligent charging management chip is like a highly efficient power commander. It adopts a 5V USB input standard and can precisely output a charging current of 1.6A. It is specially designed for the series application of dual lithium batteries. Its innovative asynchronous boost architecture is like a precise energy converter, efficiently delivering 90% of the electrical energy to the battery, with a stable operating frequency within the golden range of 500KHz.

This chip integrates multiple intelligent features:
    1. It adopts a highly integrated design philosophy, with built-in driver MOSFETs and peripheral circuits as streamlined as works of art
    2. It features a complete charging life cycle management: from trickle wake-up to constant current fast charging, then to constant voltage precise charging, and finally intelligent cut-off    
    3. The adaptive current regulation system will adjust the current parameters in real time according to the changes in input voltage, just like an experienced sound engineer    
    4. The soft start function is like a gentle wake-up service, avoiding current surges through progressive PWM control

Core advantages overview:
    It features a wide operating voltage window (3.6V to 6.0V) and a 20V overvoltage protection shield
    - Programmable 1.6A charging current to meet personalized needs
    - Multiple safety protections: Temperature guardians, voltage sentries, and current police are on duty around the clock
    - Thoughtful NTC temperature monitoring function
    -It adopts a compact ESOP8L package, saving circuit board space

Application fields
    From dynamic Bluetooth speakers to portable e-cigarette devices, from powerful power tools to agile children's toys, and even eco-friendly solar devices, the CST5090 can provide reliable energy support.
  
Product specifications
    5V input asynchronous boost charging
    The operating voltage is 3.6V to 6.0V, and the chip withstand voltage is 20V
    The maximum charging current is 1.6A, and the charging current can be programmed and set 

      The boost charging efficiency is 90%

    Adaptively adjust the input current to match all adapters

    NTC function

    Under-voltage protection, over-temperature protection, over-voltage protection, overcurrent protection
    ESOP8L package

Wiring Guide