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Category: Power Supply Circuits / Chargers Views: 3247 Rank: 0 The circuit in Fig 1 supports portable applications in which a microprocessor controls battery charging. Step-up switching regulator IC1 boosts VIN (5V) to supply a combination of charging and load current. (Note that the 5V source must have short-circuit protection.) IC2 is a high-side current-sense amplifier that monitors charging current. Commands from the processor are CHARGE ON /OFF and FAST/TRICKLE CHARGE.IC2 produces an output current (OUT) equal to 10-4 of the current through sense-resistor R9. During a fast charge, Q3 and Q4 are on, so this output current flows through the parallel combination of R11 and R4 (approximately). The resulting feedback to pin visit page. IC2 produces an output current (OUT) equal to 10-4 of the current through sense-resistor R9. During a fast charge, Q3 and Q4 are on, so this output current flows through the parallel combination of R11 and R4 (approximately). The resulting feedback to pin http://www.edn.com/archives/1995/060895/12di2.htm
Related circuits This design is a 3A battery charger intended for use with 5-cell Ni-Cd or Ni-MH battery packs (but can be modified to suit other numbers of cells). The circuit includes automatic shutoff that occurs when the battery temperature rises 10°C above ambient. Car-Battery charger for Nokia 8210 It`s just a simple power supply with a 7805 regulator, the chip must be mounted on a large metal radiator, because the current requested by the regulator is near 0.4 A The circuit shown here is that of the IC controlled emergency light. Its main features are: automatic switching-on of the light on mains failure and battery charger with overcharge protection. The circuit is capable of charging a 12 volt component selection. When the battery voltage battery at up to a six ampere rate The circuitry for charging batteries is unregulated, and depends on the operator to disconnect the battery before it gets overcharged. The circuitry for the NiCads is an especially crude regulator, but it keeps the batteries from over-charging. Here, two series silicon rectifiers limit the... Using this circuit will give Good Charging results to the Gell Cell Battery used in the Metal Detector, or any other simular and smaller type battery. This charger is both Current and Voltage Regulated. Due to the low duty cycle of flashing LED, the average current The circuit is capable of supplying either a trickle (50 mA) or high-current (1-A) charge. You can select either charging method or an automatic mode that will first trickle charge a battery if it is particularly low before switching to high-current charging.If the battery`s voltage is low,... ELECTRONIC CIRCUIT FOR STAND-ALONE WIND ENERGY CONVERSION SYSTEMSDC10105VOLUM...
BoostMicro 3V - 5V Step-up Voltage Converter Boost Circuit for Battery Powere...
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