MIC38C45ABMM

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

Application of the MIC38C45ABMM
The MIC38C45ABMM is a synchronous buck controller with exceptional light load capabilities, making it ideal for a variety of applications. First and foremost, the chip is used in high-volume, off-line power supply designs, such as those found in laptop computers, cellular phones and other portable communication devices. It is also suitable for smaller battery charger and DC/DC converter designs where a wide input voltage range and industry-standard synchronous rectifier need to be supported. Finally, it is applicable to lighting applications such as those found in automotive and general-purpose lighting.

Working Principle of the MIC38C45ABMM
At the heart of the MIC38C45ABMM is the synchronous buck controller with primary-side control. This allows the controller to function independent of a conventional optocoupler, isolated gate driver, or secondary-side current sense feedback and simplifies designs significantly. The pulse width modulation (PWM) control circuit allows for current mode control for fast transient response and accurate control of the regulation loop. Using a current-mode-controlled PWM reduces component stress, increases circuit efficiency, and increases the power factor by eliminating asymmetric dead times found in voltage-mode controlled PWM. The synchronized rectifier feature expands the operating frequency range to 50kHz, allowing the use of small inductors and capacitors while still meeting EMI and efficiency targets. Finally, the light load control ensures low power losses at minimum load, further increasing efficiency and minimizing thermal stress on components.

Conclusion
The MIC38C45ABMM is an ideal solution for many different application types, from laptop computers and cellular phones, to automotive and general-purpose lighting. Its synchronous buck controller with primary-side control, current-mode-controlled PWM, and synchronized-rectifier feature make it a suitable choice for designs that need to support a wide input voltage range, industry-standard synchronous rectifiers, and fast transient response. Finally, its light load control increases efficiency and decreases component and thermal stress. This makes the MIC38C45ABMM an ideal choice for high-volume, off-line power supply and smaller battery charger and DC/DC converter designs.

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