Maxim MAX22514带DC-DC转换器IO-Link收发器解决方案

Maxim公司的MAX2251是集成了高压功能的IO-Link收发器,包括一个24V线路驱动器,集成的DC/DC降压稳压器,以及5V和3.3V线性稳压器.器件目标于IO-Link设备,工业开关传感器应用,并采用标准SPI接口进行配置和监视. MAX22514具有高效率同步200mA DC/DC降压稳压器,具有有源二极管反向保护,电流过载保护,软起动, 扩频操作和可调输出电压.DC/DC稳压器在正常操作时工作在固定1.229MHz(典型)频率.稳压器在正常操作时,可配置工作在PWM模式,脉冲频率调制(PFM)模式或非连续导通模式(DCM).通过设定MODE寄存器的BUCKDCM或BUCKPFM模式比特来选择工作模式.DC/DC稳压器由PV24电压供电,以防止电源反向.PV24对地旁路1μF电容,保证DC/DC转换器的合适操作.器件集成 ±1kV/500欧姆浪涌保护和反向极性保护.采用微型WLP(2.5mm x 2.6mm) 和TQFN (4mm x 5mm)封装.主要用在IO-Link和工业传感器和执行器设备以及IO-Link主收发器.本文介绍了MAX22514产品亮点,功能框图,简化应用电路以及评估板MAX22514 EVK主要特性,框图,电路图,材料清单和PCB设计图.

The MAX22514 IO-Link transceiver integrates high voltage functionality, including one 24V line driver, an integrated DC-DC buck regulator, and 5V and 3.3V linear regulators. The MAX22514 is targeted for IO-Link devices, masters, and industrial switching sensor applications, and can be configured and monitored using a standard SPI interface.

The MAX22514 features an integrated high-efficiency synchronous DC-DC buck regulator with active diode reverse protection, current overload protection, soft start, spread spectrum operation, and an adjustable output voltage. The DC-DC regulator operates with a fixed 1.229MHz (typ) frequency during normal operation. The regulator can be configured to operate in pulse-width modulation (PWM) mode, pulse frequency modulation (PFM) mode, or discontinuous conduction mode (DCM) during normal operation. Select the operating mode by setting the BUCKDCM or BUCKPFM mode bits in the MODE register. The regulator is enabled by default but can be disabled through the serial interface. The DC-DC regulator is supplied from the PV24 voltage to protect against supply inversion. Bypass...