SUW64812C

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DC-DC converters are devices used to convert a direct current (DC) power source from one voltage to another. The most common type of DC-DC converter is a Buck-Boost converter, which is capable of converting both high and low input voltages to one relatively constant output voltage. The SUW64812C is a high efficiency automotive grade Buck-Boost DC-DC converter designed and manufactured by Siliconix.

The SUW64812C is designed to operate from an input voltage range of 6V to 45V and can provide output voltages from 1.8V to 36V. It is capable of operating in buck, boost, and inverting modes and can provide up to 500mA of continuous output current. It has an extremely low quiescent current of only 0.6mA required to operate, making it ideal for applications that require low standby power. In addition, the device has built-in protections such as over-voltage, over-current and over-temperature protection. It is also capable of integrated reverse battery protection, protecting the device from damage caused by reversed input voltage.

The SUW64812C is commonly used in automotive, industrial and consumer applications that require a wide input voltage range and low standby power consumption. It is specifically designed to be used in applications that require battery pack and solar panel charging, as well as motor and LED lighting control. The device is enclosed in a low profile SOP-8 package and can be used for both surface mount and through-hole assembly processes. It has an operating temperature range of -40°C to +85°C making it suitable for use in a variety of harsh environmental conditions.

The working principle of the SUW64812C Buck-Boost DC-DC converter is based on an energy storage inductor and a power MOSFET switch. The inductor stores energy whenever the switch is open, and when the switch closes, the stored energy is transferred to the output voltage. An external reference voltage is applied to the FB (Feedback) pin, setting the output voltage of the device. When the output voltage drops, the controller senses the decrease in voltage and increases the duty cycle, which in turn increases the output voltage. Similarly, when the output voltage is too high, the controller senses a decrease in input current and reduces the duty cycle to maintain the desired output voltage.

The Buck-Boost converter offers several advantages over other types of DC-DC converters. It is capable of providing an adjustable output voltage, it can efficiently provide power to both high and low voltage loads, and it does not require the use of multiple voltages to achieve the required output voltages. In addition, it has a wide input voltage range meaning that it can be used in different applications. Overall, the SUW64812C is a highly efficient and versatile automotive grade Buck-Boost DC-DC converter.

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