MIC3808BMM-TR

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The MIC3808BMM-TR is a high-voltage, high-power offline power converter integrated circuit (IC) designed specifically for AC/DC conversions. It utilizes a high-efficiency switch-mode control topology that enables the converter to achieve power efficiency levels of up to 95%.

The MIC3808BMM-TR is a member of the MIC3800 family of power conversion ICs, and is particularly suitable for consumer and industrial applications where the AC or DC input voltage ranges from 85-265VAC, or 10-30V DC, respectively. The integrated IC provides a variety of system protection features, including over-voltage protection, over-current protection, over-temperature protection, and reverse voltage protection.

Application of MIC3808BMM-TR

The MIC3808BMM-TR is an ideal choice for a wide variety of AC/DC applications, such as:

• Smartphone chargers
• LED lighting systems
• Portable medical equipment
• Home appliances
• TV sets
• Small appliances

Working Principle of MIC3808BMM-TR

The MIC3808BMM-TR consists of an AC rectifier bridge, an energy storage inductor, and an auxiliary oscillator circuit. The rectifier bridge converts AC line voltage to DC, with the help of the energy storage inductor, which smoothens the current during AC rectification. The auxiliary oscillator circuit emits a pulse signal in synchronization with the AC input frequency, to generate the switching timeslot required to enable the switchmode control topology.

The resulting PWM signal is then processed by the internal switching circuitry and is then sent to the low-side and high-side MOSFETs to enable the switch-mode conversion. The low-side and high-side MOSFETs switch between the two sides of the energy storage inductor, to control the current flow from the AC input to the output of the converter The energy storage inductor buffers the current, and also helps reduce the RMS output ripple.

Advantages of Using the MIC3808BMM-TR

• High efficiency rating of up to 95%
• Wide input voltage range from 85-265VAC and 10-30V DC
• Built-in over-voltage, over-current and over-temperature protection
• Low electromagnetic interference (EMI) due to advanced switch-mode control topology
• Compact package size (5x5mm)

In conclusion, the MIC3808BMM-TR is a highly efficient and reliable offline power converter IC, designed and optimized for AC/DC power conversion applications. Its advanced design allows it to achieve high efficiency and provides a wide range of system protection features. Furthermore, its small package size makes it ideal for a wide range of applications, from large-scale industrial applications to small home appliances.

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