Si8540

Si8540 HIGH-SIDE CURRENT SENSE AMPLIFIER Features  Complete, unidirectional high-side current sense capability  0.2% full-scale accuracy  +5 to +36 V supply operation  85 dB power supply rejection  90 µA max supply current  9 µA shutdown current  Operating Temperature Range: –40 to +85 °C  5-pin SOT-23 package  RoHS-compliant Applications  Battery chargers  Smart battery packs  DC motor control  Backup systems  Current control applications Description The Si8540 is a unidirectional, 36 V (max), high-side current sense amplifier for use in applications requiring current monitoring and/or control. This device draws bias current from the high-side line to which it is attached, eliminating the need for an external supply. It measures current from 0.1 to 10 A by sensing the voltage across an external sense resistor (or PCB trace) from dc to 20 kHz and can achieve measurement accuracies of 0.2% (typical) at full load. The device output i...