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Category: Power Supply Circuits / Chargers Views: 3763 Rank: 0 In Figure 1, an MC34063A switching regulator and an MC33342 NiMH battery-charger IC combine to generate from an unregulated power supply a 600-mA battery charger for one to four NiMH cells.Using some tricks with the current limit and the feedback network, you can make a simple dc/dc converter into a programmable current source for NiMH charging. IC1 operates in continuous mode in the buck converter without the output capacitor. The eliminat visit page. Using some tricks with the current limit and the feedback network, you can make a simple dc/dc converter into a programmable current source for NiMH charging. IC1 operates in continuous mode in the buck converter without the output capacitor. The eliminat http://www.edn.com/article/CA56207.html
Related circuits Charger serves load while charging battery The battery-charger circuit in Figure 1 monitors the battery voltage and automatically initiates a recharge if required. Its output-current capacity is sufficient to simultaneously charge the battery and supply the load. It thus provides continuous power to the load during recharge operations.... 4-Cell Ni-Cad Regulator/Charger The new LTC1155 Dual Power MOSFET Driver delivers 12V of gate drive to two N-channel power MOSFETs when powered from a 5V supply with no external components required. This ability, coupled with its micropower current demands and protection features, makes it an excellent choice for high side... Step-up supply charges battery 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... Operation amplifier A1 directly drives the VN64GA with the error signal to control the output voltage. Peak rectifier Dl, CI supplies error amplifier A1 and the reference zener. This extra drive voltage must exceed its source voltage by several volts for the VN64GA to pass full load current. The... Simple Lead Acid Battery Charger The above pictured schematic diagram is just a standard constant current model with a added current limiter, consisting of Q1, R1, and R4. The moment too much current is flowing biases Q1 and drops the output voltage. The output voltage is: 1.2 x (P1+R2+R3)/R3 volt. Current limiting kicks in when... This circuit is used to clear internal shorts in nickel cadmium batteries Single Cell Lithium-ion battery charger The rechargeable Li-ion, I began to intensely interested last summer, when I managed to bring a holiday without a phone charger. After several experiments involving originated in Figure 1, which has proved. Involvement of the stage provides a limited current charging and constant voltage.... Li-Ion Charge Termination Using the LT1505 Li-Ion batteries are normally charged with a current limited constant voltage for a fixed length of time. At the end of this time period, the voltage must be removed to prevent internal chemistry changes in the battery. At a minimum, a timer is needed to terminate the charging process after... Voltage regulator tutorial & USB gadget charger circuit
How to Make a 12v DC Power Supply For a RC Chargers Lipo, Nimh, Nicd,
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