IP4805SA

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DC to DC converters provide an efficient solution to convert a voltage from one magnitude to another, and for drawing power from a low voltage source, such as a battery, and delivering it to a higher voltage target, such as a computer motherboard. The IP4805SA is such a DC-DC converter module, designed for low power applications and featuring automatic power saving during no load conditions.

Introduction to the IP4805SA

The IP4805SA module is a type of DC-DC converter, and utilizes pulse width modulation to achieve a regulated output voltage from the supplied input voltage. This device has a wide input voltage range of 4.2V to 28V, and an output voltage range of 4.75V to 24V, adjustable via an external resistor divider. The output voltage can also be easily preset to one of eight pre-defined voltages from 4.75V to 24V using internal fuse options.

The output current of the IP4805SA is rated at up to 1.5 Amps, allowing the module to be used for a variety of low power applications. The IP4805SA also features a burst mode, allowing low current loads to be supplied with very low standby power for improved efficiency. The IP4805SA can also be configured to operate in valley switching mode or peak-switching mode.

Safety Features

The IP4805SA incorporates a number of safety features to provide increased system reliability. When an over-voltage or under-voltage condition is detected, the module will shut down and restart when the input voltage returns to a normal level. The IP4805SA also provides over-current protection with an auto-restart after the fault has been cleared. The module utilizes the Heavy Load Soft Start feature to limit the inrush current when the output load is applied.

Applications and Features

The IP4805SA is suitable for a variety of applications, such as automotive, marine, industrial, and medical equipment. The wide input voltage range of 4.2V to 28V makes it suitable for use in applications that operate with varying input voltage. This allows the IP4805SA to be used in stationary and mobile applications. The IP4805SA is also designed to meet the stringent safety requirements of the automotive industry for protection against electric shock, short-circuits, and over-current conditions.

Working Principle

The IP4805SA DC-DC converter module utilizes a single stage design comprising of a main switching transistor, an inductor, a power diode, and an output filter capacitor. The IP4805SA also utilizes an additional feedback loop, consisting of an internal resistor and an external feedback resistor, to ensure that the output voltage is maintained at the preset target. This feedback voltage is compared to an internal reference voltage, and the duty cycle of the switching transistor is adjusted accordingly.

The switching transistor is controlled by a Pulse Width Modulation (PWM) signal generated on a Switching Frequency control pin. The switching frequency can be adjusted to optimize performance compared to efficiency, increasing the switching frequency to reduce line and load regulation, or decreasing the switching frequency to reduce switching losses and heat dissipation. The IP4805SA also incorporates an under-voltage lockout (UVLO) function, which prevents the module from operating until the input voltage rises above a minimum preset voltage.

The IP4805SA DC-DC converter module provides an efficient and reliable low power solution for a variety of applications. The device incorporates a wide range of features including safety and current protection, adjustable output voltage, wide input voltage range, and adjustable switching frequency. The device also features burst mode operation for improved efficiency in lower current applications.

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