LTC4150CMS#TRPBF

The LTC4150CMS#TRPBF by LT is a Coulomb Counter and Battery Gas Gauge designed for applications in handheld PCs, portable products, battery chargers, palmtop computers, PDAs, cellular telephones, and wireless modems. This device accurately measures battery depletion and charging by monitoring current through an external sense resistor. It utilizes a voltage-to-frequency converter to transform the current sense voltage into output pulses, with each pulse representing a fixed quantity of charge flowing into or out of the battery. The part also indicates charge polarity. Key electrical specifications include a ±50mV sense voltage range, a charge count frequency of 32.55Hz/V, and a low shutdown current of 1.5μA. It operates over a voltage range of 2.7V to 8.5V. The LTC4150 is suitable for 1-cell or 2-cell Li-Ion and 3-cell to 6-cell NiCd or NiMH battery applications. It comes in a 10-pin MSOP package and is available in tape and reel.

This component is intended for applications requiring accurate battery gas gauging, such as portable computers or PDAs that need to save data or state information before shutting down when the battery reaches a critical discharge point. Accurate prediction of this point allows the device to run longer on battery power. The device does not require a precision timer capacitor or crystal for operation.