The CJMCU-25504 is the first new intelligent integrated energy harvesting nanopower management solution ideal for ultra low power applications with special needs. The device is designed to collect and manage microwatt (μW) to milliwatt (mW) power generated from various DC sources such as photovoltaic (solar) generators or thermoelectric generators. The bq25504 is the first in its class to implement a high efficiency boost converter/charger for products and systems with tight power and operational requirements, such as Wireless Sensor Networks (WSN). The design of the bq25504 begins with a DC-DC boost converter/charger that requires only microwatts of power to start working.

        After the boost converter/charger is activated, it can efficiently extract energy from a low-voltage output collector such as a thermoelectric generator (TEG) or one/two solar panels. The boost converter can be started with VIN as low as 330mV, and after startup, it can continue to acquire energy with VIN as low as 80mV.
 
        The bq25504 also implements a programmable maximum power point tracking sampling network to optimize power transfer to the device. VIN_DC open-circuit voltage sampling is programmed by an external resistor and held by an external capacitor (CREF).
 
 
Characteristic:
 
Parameter:

  • Energy source input voltage VIN(DC): 0.13V-3V

  • Energy storage component BAT voltage: 2.5V-5.25V

  • Working environment temperature: -40~85 degree

  • Boost mode switching frequency: up to 1MHZ

  • Working mode: cold start mode, boost mode, thermal protection cut-off mode


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