ASA01A18-L

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DC/DC converters are devices used to convert a direct current (DC) voltage from one level to another. This type of voltage conversion is used in a wide variety of applications, including reduced power consumption, regulating input voltage to specific levels, improving circuit power efficiency, and reducing heat generated by equipment. The type of DC/DC converter used depends on various factors, such as the type of input voltage, output current, and the power run-time required for the application.

The ASA01A18-L is a DC/DC converter manufactured by RECOM Power. It is a low-power, 2-mode DC/DC converter, designed for use in a wide range of industrial applications, such as communications, instrumentation, audio amplifiers, lighting, or any system which requires regulated power with low noise. It is available in a wide range of input and output voltage and current ratings.

The ASA01A18-L is a switching dc/dc converter with two different operating modes. In the step-up mode, the input voltage is increased, and a lower voltage is output. In the step-down mode, the input voltage is reduced, and a higher voltage is output. This makes it ideal for projects where the input voltage may vary during operation.

The ASA01A18-L has a wide range of features designed for industrial applications, including:

• Wide 4:1 input voltage range: 5.5 -18 Vdc.
• Output voltage adjustable from 1.2 to 18 Vdc.
• Typical efficiency up to 96%.
• Low output voltage ripple (1% peak-to-peak).
• Low quiescent current (12 mA typical).
• High output current up to 2 A.
• Internal protection against over-temperature, reverse polarity, overload, and short-circuit.

The ASA01A18-L is designed to work in two configurations, depending on the application. In the first configuration, both inputs are connected together. This is referred to as the “Parallel” configuration. In the second configuration, the inputs are connected to a single supply. This is called the “Split Supply” configuration.

The working principle of the ASA01A18-L is based on Pulse Width Modulation (PWM). PWM is a technique used to control an AC or DC motor by changing the duty cycle of the power waveform applied to it. The PWM process involves switching the power on and off in a controlled fashion to achieve a desired output voltage. In the case of the ASA01A18-L, the switching is done at a rate of 100KHz, allowing for a high-frequency operation.

In the Parallel configuration, the ASA01A18-L uses a high-frequency pulse generator, which generates a rectangular signal that is used to switch the switching transistors (MOSFETs). This signal is used to turn on and off the power to achieve the desired output voltage. The duty cycle of this signal determines the output voltage, with a higher duty cycle resulting in a higher output voltage. The output voltage is regulated by a feedback loop, which uses a voltage comparator to compare the output voltage to a reference voltage and adjust the duty cycle accordingly.

In the Split Supply configuration, the ASA01A18-L uses two separate power supplies. The primary power supply (VIN) provides the basic power needed to run the device, while the secondary power supply (VOUT) provides the output voltage. This configuration allows for increased flexibility, as the output voltage can be easily set by adjusting the secondary power supply. The output voltage is also regulated by a feedback loop, which compares the output voltage to a reference voltage and adjusts the duty cycle accordingly.

The ASA01A18-L is a versatile, low-power DC/DC converter suitable for a variety of industrial applications. The wide input voltage and output current ratings, combined with the two different configurations, make it a great choice for any project requiring a regulated output voltage. The internal protection features and low quiescent current make it an ideal choice for low-power applications.

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