AP1515-SL-13 Integrated Circuits (ICs)

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The AP1515-SL-13 is a high efficiency DC/DC buck switching regulator from Diodes Inc. It is one of the highest power DC/DC converters in this selection and is ideal for applications where high efficiency is the primary requirement. The device features a wide 4.5V to 20V input voltage range and a maximum input current of 7A. It offers an adjustable output voltage range of 1.25V to 15V and provides up to 3A of output current. The device is designed specifically to reduce power losses, enabling high efficiency and a low thermal footprint.

Application field:

The AP1515-SL-13 DC/DC buck switching regulator is ideal for a wide variety of different applications. It is primarily used in the automotive industry and can be used for automotive body controllers, safety systems, and, ECUs. It is also suitable for other areas of industry including medical and industrial.

Working Principle:

The buck switching regulator works by converting an input voltage to a lower output voltage using a MOSFET switching component. It follows a constant on-time (COT) topology to control the output voltage. The switching component is turned on for a set period of time and then turned off for a set period of time. During the on period, a certain amount of energy is stored in an inductor, then this energy is transferred to the output through the switch. This process is repeated continuously, allowing the output voltage to be maintained at a constant level.

In addition, the device uses current mode control to regulate the output voltage. The feedback pin senses the output current and compares it to the current setpoint. If the current sensed is higher than the setpoint, the duty cycle is decreased and the output voltage decreases. Conversely, if the current is lower than the setpoint, the duty cycle is increased and the output voltage rises. This ensures that the output voltage remains at the desired level.

The AP1515-SL-13 also includes an under voltage lockout (UVLO) and an over voltage protection (OVP). The UVLO shuts down the device whenever the input voltage drops below a certain threshold. The OVP protects the device from excessively high voltages by shutting down the device when the voltage exceeds a set threshold. Additionally, the device is equipped with an over-temperature protection (OTP) feature. This feature will shut down the device when the temperature exceeds a set threshold, preventing it from becoming damaged due to excessive heat.

The AP1515-SL-13 features a wide input voltage range, high efficiency, and low thermal footprint, making it an ideal DC/DC switching regulator for industrial, automotive, and medical applications. The device offers a high maximum output current, adjustable output voltage, and protection features to ensure reliable operation. The current mode control ensures that the output voltage remains stable, allowing the device to be used in a variety of different applications.

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