ADM00664

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ADM00664 is a monolithic integrated switching regulator specially developed for cost-effective offline flyback converters. It provides high performance, high efficiency, and high reliability for applications in regulating the output voltage of a flyback power supply. As a component of Evaluation Boards - DC/DC & AC/DC (Off-Line) SMPS, ADM00664 can be used in a wide variety of power applications with its superior performance and long-term reliability.

The main features of ADM00664 include: wide input voltage range, built-in soft-start circuit, low-input current, high efficiency, low noise, high current sharing capability, and low EMI (Electro Magnetic Interference). It has a maximum input voltage of 295V, a minimum input voltage of 90V, and a maximum output voltage of 195V. It also has a high efficiency of up to 97%, and a wide operating temperature range of -40°C to +85°C.

The working principle of ADM00664 is based on a flyback topology. In the flyback topology, the input voltage is stepped down by a transformer, and then rectified and filtered to provide a DC output voltage. The switching of the transformers is done using a MOSFET, which is controlled by the control circuit inside the ADM00664. The control circuit consists of an error amplifier, a voltage-mode control PWM (pulse width modulation) circuit, and an oscillator. The error amplifier is used to compare the output and reference voltage signals, which is feedback to the control circuit. Based on the feedback signals, the PWM circuit is used to generate control pulses with varying width based on the difference between the input and output signal. The oscillator is used to set the frequency of the PWM pulses which controls the voltage conversion process.

ADM00664 features a wide range of protection functions, such as over-current protection, over-temperature protection, and short-circuit protection. It also has built-in adaptive-frequency modulation, which helps to reduce the EMI generated by the switchmode power magnetics. The chip also features an adjustable soft-start circuit, which helps to reduce the inrush current when it is powered on. It has a wide range of applications, such as lighting, power supply, motor control, and power conversion.

In conclusion, ADM00664 is a highly reliable, cost-effective monolithic integrated switching regulator specially developed for offline flyback converters. It provides excellent performance, high efficiency, and long-term reliability for Evaluation Boards - DC/DC & AC/DC (Off-Line) SMPS. The working principle of ADM00664 is based on the flyback topology, while its various protection functions and adjustable soft-start circuit increases its safety and protects it from overloading or other damages. The chip has a wide range of applications in a variety of power applications, and its high efficiency and EMI reduction capability makes it a great choice for system designers.

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