[Design View / Design Solution]
Develop Affordable Mixed-Signal Battery-Charger Designs
Using these techniques, your battery-charger designs can take advantage of the best of both the analog and digital worlds.
OPTIONAL FEATURES Using a single microcontroller and multiple high-speed analog PWM modules makes it possible to add charger bays for multi-bay applications, as well as out-of-phase switching techniques and input power-budgeting features. Such firmware increases system precision because they enable the calibration of the Li-ion termination voltages and charge currents.
By using a mixed-signal approach to developing battery chargers, battery-charger designs can exploit the best of both the analog and digital worlds. A mixed-signal approach enables high-frequency operation (500 kHz) and high-speed protection (12-ns current sense to output), and it minimizes the size of filtering components. In addition, the system's programmable digital features allow appropriate determination of stage-of-charge and set charge current.
Because it facilitates the programming of settings and currents, firmware enhances new battery-charging methods. This approach differentiates one mixed-signal design from another. This type of design isn't limited to Li-ion and NiMH batteries, and it leaves the door open for the programming of future rechargeable technologies into the system.
Recommended Reading:
Linden, David, and Reddy, Thomas B., Handbook of Batteries, Third Edition, McGraw-Hill Inc., New York, N.Y., 2002
i need two chargers one multiple from 1.5volts dc to 110ac
Anonymous -May 30, 2009
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