MAX253是Maxim美信半导体公司的一款隔离电源产品，MAX253是1W原边变压器H桥驱动器，用于隔离电源，本站介绍了MAX253的封装应用图解、特点和优点、功能等，并给出了与MAX253相关的Maxim元器件型号供参考。
MAX253 - 1W原边变压器H桥驱动器，用于隔离电源 - 隔离电源 - Maxim美信半导体高性能芯片品质 - 美信半导体
The MAX253 monolithic oscillator/power-driver is specifically designed to provide isolated power for an isolated RS-485 or RS-232 data interface. The device drives a center-tapped transformer primary from a 5V or 3.3V DC power supply. The secondary can be wound to provide any isolated voltage needed at power levels up to 1W.
The MAX253 consists of a CMOS oscillator driving a pair of N-channel power switches. The oscillator runs at double the output frequency, driving a toggle flip-flop to ensure 50% duty cycle to each of the switches. Internal delays are arranged to ensure break-before-make action between the two switches.
The SD pin puts the entire device into a low-power shutdown state, disabling both the power switches and oscillator.
