SBAA598 September 2023 AMC1300 , AMC1300B-Q1 , AMC1301 , AMC1301-Q1 , AMC1302 , AMC1302-Q1 , AMC1311 , AMC1350 , AMC1351
Isolated amplifiers provide isolation between their input signal and output signal, which is useful in many applications, such as phase current sensing in motor drives. Providing the high-side power to an isolated amplifier can be challenging. This application note introduces a bootstrap charge-pump circuit as a small, low-cost alternative for generating the high-side power supply and goes into detail regarding the design of such a circuit.