MAX5975BETE+

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The MAX5975BETE+ is an ac-dc converter and offline switcher integrated by Maxim Integrated, serving as a power management integrated circuit. This power management switch is ideal for applications characterized by performances such as low cell phone standby current, high efficiency and high frequency operation. It integrates a 500mA, 0.65V power switch, a high-side and low-side monitor circuit for current and temperature protection, and an error amplifier. The MAX5975BETE+ offers excellent features such as high frequency operation, high efficiency, temperature protection and better standby current.

Application Field

The MAX5975BETE+ integrated circuit is suitable for applications requiring high frequency switching, high efficiency, low standby power and low cost. It is often used in electronic products that demand portability, such as notebooks, PDAs and cell phones. The high frequency operation enables users to reduce the size of the external components and hence the cost of the application. Furthermore, the MAX5975BETE+ achieves high efficiency levels with a very simple design and is tolerant to voltage variations.

Working Principles

The MAX5975BETE+ integrated circuit contains several components to achieve its desired performance. The primary components are a 500mA, 0.65V power switch, a high-side and low-side monitor circuit for current and temperature protection, and an error amplifier. This integrated circuit also comes with a fault protection circuit and an on/off control circuit.

The power switch is the core element of the integrated circuit and is responsible for the conversion of the low-voltage dc input to a high-frequency ac output. This high frequency ac-output in turn charges the battery as well as provides power to the load. The current and temperature protection circuits protect the system from over current and over temperature scenarios. The error amplifier is responsible for the transfer of error signal to the on/off control circuit. The error amplifier also monitors the output voltage and provides feedback to the on/off control. The on/off control circuit is responsible for controlling the power switch which turns it on and off accordingly.

Conclusion

The MAX5975BETE+ is an ac-dc converter and offline switcher integrated by Maxim Integrated, designed to deliver high frequency switching, high efficiency, low standby power and low cost. It is often used in electronic products that demand portability, such as notebooks, PDAs and cell phones. This integrated circuit consists of a 500mA, 0.65V power switch, a high-side and low-side monitor circuit for current and temperature protection, and an error amplifier as well as an on/off control circuit.

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