PAH200H481R8/BC

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DC-DC converters are commonly used in a variety of electronic devices and circuits. The PAH200H481R8/BC is a full bridge rectified switching controller designed to regulate the output voltage by pulse duration modulation. It is suitable for applications such as telecommunications, computer, industrial and automotive battery chargers, motor drives, etc.

The PAH200H481R8/BC utilizes the primary switch triggered by a pulse frequency input which is connected to an upper and lower oscillator compensation pin. As the current load varies, the compensation ratio adjusts to maintain the desired output voltage levels. This helps to provide a stable output voltage regardless of changes in load.

The controller incorporates a low on-resistance full bridge rectifier for use with external MOSFETs. The rectifier converts the AC input voltage to a fixed DC voltage that is provided to the controller. When the controller is subjected to an overvoltage, it will automatically turn off the primary switch to protect the controller from damage. The controller also features a built-in temperature shut-off circuit which shuts off the controller when the temperatures exceed a certain threshold.

The PAH200H481R8/BC works on a continuous conduction mode of operation and can be employed in a buck, boost or flyback topology. In a buck topology, the voltage is regulated by changing the duty cycle of the output MOSFETs to reduce or increase the output voltage. In boost mode, the output voltage is increased by holding the output MOSFETs in the off state and allowing them to generate the output voltage by storing energy in an inductor.

The PAH200H481R8/BC is best suited for applications such as computer power supplies, motor drive control, battery charger and switched mode power supply. It can also be used in automotive applications such as car audio systems, automotive lighting systems, and various other electronic circuits. The controller is capable of operation in ambient temperatures ranging from -40C to +85C, and provides better than 1% line regulation and excellent load regulation over its full input voltage range.

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