Constantvoltage Load Box For Battery Simulation

Lm2576 Circuit

Linear Technology has developed many new switcher-based battery charger ICs. Testing accuracy, regulation and efficiency in the lab with a battery load is inconvenient because the terminal voltage of a battery constantly changes as it is being charged. If much testing is to be done, a large supply of dead batteries will be needed, since one set of cells can quickly become overcharged. This article describes an active load circuit that can be used to simulate a battery in any state of charge....

Lt1510 Charger With Av Termination

Schematic Jbl Charge

Any portable equipment that requires fast charge needs proper charge termination. Commonly, a LT1510 constant-voltage, constant-current type charger controlled by a microcontroller is used. Sometimes, however, a microcontroller is not available or is not suitable for fast-charge termination. When fast charging NiCd batteries with constant current, the internal battery temperature rises toward the end of the charge. Since the temperature coefficient of NiCd is negative, the temperature rise...

Power Management And High Efficiency Switcher Maximize Ninevolt Battery Life

Tvr Battery Circuit Repaire

The LTC1174 (3.3V, 5V and adjustable versions) can convert a 9V battery source to system power with very high efficiency. Efficiency is over 90 at load currents from 20mA to 425mA and over 85 at a load current of 4mA. For a given load, maximum battery life can be obtained by minimizing shutdown current during system shutdown and maximizing converter efficiency during operation. A single control line to the LTC1174 can be used to select shutdown mode or operational mode, as required. For this...