ISE1205A-H Power Supplies - Board Mount

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DC-DC converters are a type of power supply that take direct current input from one voltage level and convert it to direct current output at another voltage level. They are used in many electronic circuits to supply power from batteries and other sources. The ISE1205A-H is a type of DC-DC converter that is used to convert an input voltage between 4.5 and 18 Volts to an output voltage of regulated 5 Volts. It is a switch-mode converter, meaning it uses switching electronics and inductors to achieve high efficiency.

The ISE1205A-H is an Isolated DC-DC converter, which means that the input and output are electrically isolated from one another. This prevents the return path of the output current loop from creating a ground loop in the circuit it is feeding. The isolation also provides an extra layer of protection against over-voltage and inrush currents coming into the circuit.

The ISE1205A-H is a highly efficient switch-mode converter, providing up to 94% efficiency. It has built-in protection against short-circuits and over-current, as well as protection against over-temperature. The device is also capable of managing a wide input voltage range, from 4.5 to 18 Volts, while maintaining a regulated 5 Volt output. This makes it an ideal choice for use in battery-powered applications.

The device features an automatic power saving (APSC) mode, which reduces the power consumption when light loads are used. This mode significantly increases the efficiency of the converter and reduces the amount of power drawn from the source. The APSC mode is especially useful for low-power applications where long battery life is important.

The working principle of the ISE1205A-H is based on the principle of forward conversion. The input voltage is applied across the primary winding of a transformer, while the secondary winding is connected to a high-frequency switch. When the switch turns on, energy is transferred to the secondary winding, and a voltage is induced across it. This voltage is rectified and filtered to provide a DC output voltage at 5 Volts.

The high-frequency switch is controlled by a Pulse Width Modulation (PWM) circuit. This circuit senses the feedback voltage from the output stage and modulates the duty cycle of the switch to maintain a constant output voltage. The duty cycle of the switch is directly proportional to the amount of current flowing in the circuit, allowing the device to maintain a constant output voltage even when under heavy loads.

In summary, the ISE1205A-H is a DC-DC converter used to convert an input voltage between 4.5 and 18 Volts to an output voltage of regulated 5 Volts. It is an isolated converter that provides high efficiency up to 94% as well as protection against short circuits, over-current, and over-temperature. The device utilizes the principle of forward conversion and a PWM circuit to maintain a constant output voltage even under heavy loads. It is an ideal device for low-power applications where long battery life is important.

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