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Battery charger circuits electronic circuits design

Simple and complex battery chargers electronic circuits design projects and schematics with diagrams and description for various battery type.

NiMH battery charger using LTC4060

Using the LTC4060 integrated circuit , can be designed a very simple smart NiMH battery charger electronic project . This electronic charger circuit project is a complete fast charging system for NiMH or NiCd batteries. This NiMH battery charger circuit require few external components and it has a very high efficiency .

An external PNP transistor provides charge current that is user programmable with a resistor. Maximum charge time is set by a small external capacitor .
No external current sense resistor is needed, and no blocking diode is required.

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Solar powered battery charger using LTC4071

A simple Solar powered battery charger , photovoltaic charger circuit can be designed using LTC4071 Li-Ion/Polymer Shunt Battery Charger System with Low Battery Disconnect .
At low VCC voltage, photovoltaic current flows to both the system at VCC as well as the battery.

When VCC reaches the programmed float voltage (4.1V with ADJ floating) then the LTC4071 shunts excess current not used by the load, limiting VCC to 4.1V and effectively reducing the battery charge current to zero. If the photovoltaic cells stop supplying current, the battery supports the load at VCC through the LTC4071.

Electronic Circuits: 

LM3647 universal battery charger

A very simple universal battery charger electronic project can be designed using the LM3647 controller for Lithium-Ion (Li-Ion), Nickel-Metal Hydride (Ni-MH) and Nickel-Cadmium (Ni-Cd) batteries. The universal battery charger device can use either a pulsed-current charging or a constant-current charging technique. The device can also be configured to discharge before charging. Throughout the charging sequence the LM3647 monitors voltage and/or temperature and time in order to terminate charging.

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