Li-Ion Battery Switching Charger

Li-Ion Battery Switching Charger As mobile devices become increasingly power-hungry, battery sizes have been forced to increase in capacity in order to meet the demand for longer usage time. Designers are faced with the challenge of decreasing the amount of time it takes to charge these larger batteries, minimizing the thermal dissipation created during charging, […]

1.5A Dual Input Switchmode Charger

1.5A Dual Input Switchmode Charger The bq24140 is a compact, flexible, high-efficiency, USB-friendly switch-mode charge management device for single-cell Li-ion and Li-polymer batteries used in a wide range of portable applications. The charge parameters can be programmed through an I2C interface. The IC integrates two synchronous PWM chargers, power MOSFETs, input current sensing, high-accuracy current […]

Charger Electrical Wiring Diagram of 1969 Dodge V8

The schematic that will be shown here is the charger electrical wiring diagram of the 1969 Dodge V8. The wiring diagram is quite clear to read, we advise you to understand it first before making any changes on your Dodge V8 wiring system to avoid any circuit shorting. The parts you will see inside this […]

Overcurrent Protection Device at Auto-Cigarete Lighter Power Outlet

Ever had a short circuits or blown fuses on your automobile environment or portable equipment when plugged your mobile phone charger into Cigarete Lighter Power Outlet? We provide you with information about how to prevent that conditions by providing an overcurrent protection device at the charger input, potentially in combination with an overvoltage device. The […]

Mobile Phone Battery Charger

Small and portable unit, Can be assembled on veroboard Mobile phone chargers available in the market are quite expensive. The circuit presented here comes as a low-cost alternative to charge mobile telephones/battery packs with a rating of 7.2 volts, such as Nokia 6110/6150. Circuit Diagram Mobile Phone Battery Charger Circuit Diagram Parts R1 = 1K […]

Solar Powered Lithium Ion Battery Charger

The circuit below feeds a controlled current and voltage to a 3.6v lithium ion battery. The current is limited to 300ma and the voltage is limited to 4.2 volts. The circuit uses a LTC1734 IC from Linear Technology. No diode is needed between the circuit and a 6 volt solar panel. Some very nice 6 […]

Switchless NiCd-NiMH Battery Charger

This circuit may be used to replace the single current limiting resistor often found in dirt cheap battery chargers. The alternative shown here will eventually pay off because you no longer have to throw away your NiCds after three months or so of maltreatment in the original charger. The circuit diagram shows an LM317 in […]

Mobile Phone and iPod Battery Charger

Charge your iPod without connecting it to a computer! Using the USB port on your computer to charge your player’s batteries is not always practical. What if you do not have a computer available at the time or if you do not want to power up a computer just for charging? Or what if you […]

Float Charger For NiMH Cells

Although not a new device, the LM317 is still a high-performance regulator. Its output voltage is essentially immune to fluctuations in load, supply voltage and temperature and this makes it ideal as the central element in a float charger for NiMH cells. Float charging has the advantage of keeping the cells fully charged and ready […]