AP1539SDPG-13

Application Field and Working Principle

The AP1539SDPG-13 is a low cost, high efficiency, DC-DC step-down switcher belonging to the PMIC - Voltage Regulators - DC DC Switching Regulators family. It is designed to provide a reliable power supply at high efficiency by converting a wide input voltage from 4.5V to 36V to a fixed output voltage of 12V, making it suitable for multiple power management applications. The AP1539SDPG-13 features a range of features such as programmable soft-start, current mode control, over-current protection, over-temperature protection, and advanced circuit protection. The device also incorporates synchronous rectification to ensure excellent load regulation and maximum efficiency. The AP1539SDPG-13 is capable of delivering up to 2A of load current over the specified temperature range and can provide up to 95% efficiency at full load.

Working Principle

The AP1539SDPG-13 uses a buck converter to convert a high input voltage to a low output voltage. The design consists of two main parts: an inductor that stores the energy and a switch (usually an FET transistor) that alternately couples the input voltage to the output voltage. The switch is driven at the switching frequency of up to 1.2MHz and controlled by the error amplifier to maintain the desired output voltage. In order to reduce the switching losses, the AP1539SDPG-13 utilizes synchronous rectification through the use of a low-side and high-side switch. By using both the low-side and high-side switches during the conduction phase of the switch, the AP1539SDPG-13 ensures maximum efficiency for a given input voltage. The AP1539SDPG-13 utilizes a programmable soft start feature to limit inrush current and current mode control for precise load regulation.

Safety and Certifications

The AP1539SDPG-13 employs overcurrent, overtemperature and advanced circuit protection. As well as this, the device has UL safety certification, ensuring that it meets the industry requirements and can be safely used in commercial applications. The UL safety certification also ensures that the AP1539SDPG-13 operates within a safe temperature range, preventing damage to the device or the other components connected to it.

Conclusion

The AP1539SDPG-13 is a low-cost, high-efficiency DC-DC switching regulator that belongs to the PMIC - Voltage Regulators - DC DC Switching Regulators family. The device utilizes synchronous rectification and programmable soft start features to provide excellent load regulations and maximum efficiency. It is also protected against over temperature and overcurrent, making it ideal for multiple power management applications. The device also comes with UL safety certification, ensuring that it meets the industry requirements and can be safely used in commercial applications.