MIC38HC44-1YM

Due to market price fluctuations, if you need to purchase or consult the price. You can contact us or emial to us:   sales@allicdata.com

MIC38HC44-1YM is one of the most popular power management integrated circuits (PMICs). It is specifically designed for off-line switching (AC/DC) applications and has been used extensively in automotive, industrial and consumer applications. The circuit incorporates a high efficiency synchronous rectifier bridge and a low EMI switching controller in one package.

The MIC38HC44-1YM device integrates an integrated programmable controller that provides all the necessary on/off control logic signals used to drive an external power MOSFET switch. The device can be driven by either a DC voltage or an external voltage source. With its integrated current-sense circuitry, the device can precisely control the amount of current passing through the MOSFET switch. This ensures optimal efficiency of the system by reducing power losses from unwanted current consumption.

The AC/DC converter consists of two main blocks: a rectifier bridge and a high-frequency switching regulation circuit. The bridge rectifier circuit transforms the AC input voltage into a DC voltage required by the switching regulation circuit. Then, the switching regulation circuit uses the Microchip PIC MCU to implement the switching control signals to accurately regulate the DC output voltage. The advantage of this type of device is that it provides a variable input and output voltage and current, while providing high efficiency and a low EMI emission.

In addition to the AC/DC converter, the MIC38HC44-1YM also includes a low-side current sense circuit that accurately monitors the on-time of the MOSFET switch. The current sense circuit includes a voltage-controlled current mirror with adjustable gain for sensing the MOSFET drain current. It also includes an integrated circuit breaker that can be enabled either by an external pin or a timer. The current sense circuit is powered from the same voltage source as the MOSFET switch and it does not require additional power.

The MIC38HC44-1YM device provides excellent power efficiency and is suitable for applications requiring up to 500 W of output power. The device features an integrated circuit breaker, adjustable soft-start and over-current protection that make it ideal for high-power applications. Besides being able to efficiently regulate input and output voltages and currents, the device also provides excellent noise and EMI filtering. Finally, the device is also RoHS compliant, making it an ideal choice for various applications in different environments.

The specific data is subject to PDF, and the above content is for reference