Integrated programmable charger system saves space
3 May 2006Power Electronics / Power Management
Integrated Solutions
STMicroelectronics' advanced Li-Ion battery charger chip, the L6924D, integrates all of the required power elements, plus other functions, into a very small 3 x 3 mm package. A fully monolithic battery charger designed for single-cell Li-Ion and Li-Polymer battery packs, it integrates the power MOSFET, reverse-blocking diode, sense resistor and thermal protection into a compact VFQFPN16 package. All key charging system parameters are programmable, enabling the device to be used across a full range of low cost as well as more sophisticated applications - said to be the first battery charger chip to offer such flexibility. Designers can choose between Linear and Quasi-Pulse charging modes, depending on the application's requirements. Linear Mode suits applications with low-cost power adapters, such as an external voltage regulated adapter (constant current/constant voltage profile). Operation in Quasi-Pulse Mode can be used when a current-limited adapter is available, reducing the power dissipation. The L6924D has an operating input voltage range of 2,5 V to 12 V.
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