BQ24105 Switch Mode Lead Acid Battery Charger

Switch mode circuits can implement the lead acid battery charger with a more efficient. It can be constructed using bq24105 battery charger controller. The bq24105 was originally designed to charge single-, two- or three-cell Li-polymer and Li-ion  battery packs. The bq24105 doesn’t has a feature  to control lead acid battery charger termination. So external circuitry is added  to enable this […]

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Max4373 Electronic Circuit Breaker

This a high-side current amplifier circuit breaker. The circuit-breaker application is possible for that device because  the latching-comparator output (COUT1) on the MAX4373, a high-side current-sense amplifier with reference and comparator. Here is the circuit : This circuit uses MAX4373FESA as a circuit-breaker threshold of 900mA, because its gain from sense resistor to output is 50V/V. Thus, 900mA through the […]

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52W SMPS AC-DC Adapter

One AC-DC converter that provides a good accuracy is SMPS AC-DC converter. Test data shows efficiency of 85.4% at 230 Vac input and 6A output current and 83.2% at 115 Vac input and 6A output current. This converter has the universal input voltage range. containing 92 to 276 Vac variation with only 24 mV change in the output voltage. picture […]

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