FAN6290MEMX

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PMIC (Power Management Integrated Circuits) is a type of integrated circuit or integrated system that are specifically designed to meet the needs of power management. The FAN6290MEMX is one such type of PMIC that is used for power supply controllers and monitors. This article discusses the application field and working principle of the FAN6290MEMX.

The FAN6290MEMX is an integrated power management IC from Fanny Wang Semiconductor Co., Ltd. It is designed for high-density integrated dc-dc switching power supply systems. It has a wide input voltage range of 3V to 35V, and a wide range of output current of up to 4A. The FAN6290MEMX provides comprehensive solutions and features that are essential for power management.

The main features of the FAN6290MEMX include:

• Over-Current Protection (OCP) / Over-Temperature Protection (OTP)
• Short Circuit Protection (SCP)
• Low-Shutdown Input voltage
• Minimum power on reset (POR)
• Automatic power-on reset
• Automatic input current limit
• Integrated soft start
• MOSFET gate driver
• Integrated bootstrap voltage generator

The FAN6290MEMX is mainly applied to LED backlight, LCD and LED monitors, LCD TVs, laptops, tablets, and other high-density dc-dc switching power supplying systems. It provides a cost-effective power solution with full circuit protection to ensure reliable and high-efficiency system operations.

The FAN6290MEMX works in an open loop switching power supply system with an external power MOSFET or PMOS for high voltage conversion. It consists of an error amplifier, a voltage reference, a driver, a POR circuit, a low-voltage reset Circuit, an over-temperature protection circuit, a current-limit Circuit, and a soft start circuit. When the input voltage is connected, the POR circuit will detect the voltage level and enable the IC to start operating.

The error amplifier monitors the feedback voltage and is compared with the voltage reference to generate a control signal. The output voltage of the error amplifier is then used to drive the internal gate driver, which will in turn drive the external MOSFET. The voltage reference, the current limit circuitry and the over-temperature protection are used to set the maximum output current and temperature respectively.

During normal operations, the error amplifier compares the feedback voltage with the voltage reference, and the driver will drive the internal MOSFET accordingly. The signal from the error amplifier will adjust the current level and the voltage level of the output voltage. When any of the protection parameters are exceeded, the current-limit circuit will control the output current, and the over-temperature protection circuit will shut down the MOSFET to protect the system from thermal overload.

In summary, the FAN6290MEMX integrated power management IC from Fanny Wang Semiconductor Co., Ltd. is a high-density dc-dc switching power supply system IC. It is mainly applied to LED backlight, LCD and LED monitors, LCD TVs, laptops, tablets, and other high-density dc-dc switching power supplying systems. The FAN6290MEMX has features such as over-current protection (OCP) / over-temperature protection (OTP), short-circuit protection (SCP), low-shutdown input voltage, minimum power on reset (POR), automatic power-on reset, automatic input current limit, integrated soft start, MOSFET gate driver, and integrated bootstrap voltage generator. The error amplifier, the voltage reference, the driver, the POR circuit, the low-voltage reset circuit, the over-temperature protection circuit, the current-limit circuit, and the soft start circuit are all part of the working principle of the FAN6290MEMX.

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