battery charger

  1. guclusat


    This dual-level float charger was designed for a 6V (three 2V cells) 2.5Ah battery. D2 LED was added for visual indication of charge completion, D3 indicates power, D4 LED presents overcharge condition, etc. 6V lead-acid battery charger is built using the UC3906 chip. UC3906 contains all of the...
  2. guclusat

    Reverse Polarity Protection Battery Charger

    This reverse polarity protection NiCd battery charger can charge up to 7 NiCd batteries connected in series. This number can be increased if the power supply is increased with 1.65V for each supplementary battery. If T2 is mounted on a proper heatsink, the input voltage can be increased at a...
  3. guclusat

    24V to 36V Battery Charger

    This 24V to 36V linear battery charger is long overdue. While this is an old circuit technique, it is optimized for charging higher voltage lead-acid battery packs, and could be used on other types of batteries as well. By proper transformer selection, it can be optimized for either 24 or 36V...
  4. guclusat

    Safe Management for Fast Charger for NiCd, NiMH or Li-Ion Battery Packs

    GENERAL DESCRIPTION The bq2000 is a programmable, monolithic IC for fast-charge management of nickel cadmium (NiCd), nickel metal-hydride (NiMH), or lithium-ion (Li-Ion) batteries in single- or multi-chemistry applications. The bq2000 chooses the proper battery chemistry (either nickel or...
  5. guclusat

    USB Powered Battery Charger Circuit Diagram

    The USB powered battery charger circuit is designed to function as a high-power USB mode. To comply with USB specification (Rev 1.1), a position of great power should not take more than 500 mA from the bus during normal operation. The LM3622 utilizes current limiting resistor R1 0.25 to a...
  6. guclusat

    Li-ion Battery Charger with TL431

    This is a simple to build charger for single 3.7V lipo battery. The heart of the charger is TL431 shunt regulator that controls the incoming current. Charger comes with a convenient charging LED indicator. As charging current goes down so does the intensity of the LED