A High Voltage Multiplexer With Rail To Rail Output Swing For Battery Management System Applications (Vol 14, 20161144, 2017)

This work presents a dual channel 8:1 high voltage (HV) multiplexer (MUX) with a 3-to-8 decoder and 16 HV switches for Battery Management Systems (BMS). Each HV switch consists of two pairs of sub-switches using n- and p-channel drain extended MOS devices with back to back body diode protection, respectively. The two pairs of sub-switches, connected in parallel and with dedicated gate drive signals, allow the HV MUX to have a rail-to-rail output swing and improved sampling accuracy. An experimental prototype is implemented using a 0.35 mu m 60 V BCD process. The measurement results reveal that the maximum error of the HV MUX is +0.2 mV, and the power dissipation is below 2.3 mW with a chip area of only 1.9 x 0.57 mm(2)