The FAN4010 is a high-side current sense amplifier designed for battery-powered systems. Using the FAN4010 for high-side power-line monitoring does not interfere with the battery charger’s ground path. The FAN4010 is designed for portable PC’s, cellular phones, and other portable systems where battery/DC power-line monitoring is critical.

To provide a high level of flexibility, the FAN4010 functions with an external sense resistor to set the range of load current to be monitored. It has a current output that can be converted to a ground-referred voltage with a single resistor, accommodating a wide range of battery voltages and currents. The FAN4010 features allow it to be used for gas gauging as well as uni-directional or bi-directional current monitoring.

• Low cost, accurate, high-side current sensing
• Output voltage scaling
• Up to 2.5V sense voltage
• 2V to 6V supply range
• 2µA typical offset current
• 3.5µA quiescent current
• -0.2% accuracy
• 6-lead MicroPak™ future package option

• Battery chargers
• Smart battery packs
• DC motor control
• Over-current monitor
• Power management
• Programmable current source