AP65352SP-13 Integrated Circuits (ICs)

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DC-DC switching regulators are electronic circuits used to convert a source of direct current (DC) from one voltage level to another, usually to extremely low levels of voltage. This type of device has become increasingly important in today’s technology due to the increased use of microprocessors, digital circuits and powered devices in a wide variety of applications. The AP65352SP-13 is a simple, cost-effective switching regulator from Texas Instruments (TI) that can help engineers meet power demands in their designs. This application note looks at the key features of the device, its application field and working principle.

Key Features

The AP65352SP-13 is a non-synchronous, step-up switching regulator offering seamless transitions between different power supplies. It works with a wide range of input voltages from 0.9V to 3.5V and can provide adjustable output voltage levels between 0.8V and 3.3V. It offers a maximum output current of 1.8A but can also be configured to suit lower current levels. The device has a wide range of operating frequencies, between 200 kHz and 2 MHz.

The AP65352SP-13 also has a high efficiency of up to 92%, typical, helping to reduce system power dissipation and providing a better end user experience. It also integrates several protection features, including current limitation and short circuit protection, as well as thermal protection. This helps make designs more reliable, especially in harsh environments.

Application Field

The key features of the AP65352SP-13 make it well-suited for a variety of applications, ranging from automotive and industrial to consumer and mobile. In automotive applications, it can be used to provide power for Smart ABS, EV/ESC, HVAC, infotainment, cluster and camera systems. The device can also be used in industrial applications, such as industrial motor drives and solar inverters, as well as in consumer and mobile applications, including wearables, medical wearables, digital cameras, smartphones, and power banks.

Working Principle

The AP65352SP-13 is a non-synchronous, step-up switching regulator with an internal high-side switch and an internal low-side switch. This device works by rapidly switch the input voltage between the voltage source and the output, while simultaneously charging and discharging an inductor to convert the energy level. The internal high-side and low-side switches allow for a smooth transition between input and output voltages, along with a high level of efficiency. When the low side switch turns off, the current in the inductor continues to flow and current is pulled from the output capacitor, allowing the device to continue providing power until the high side switch turns on. This high-side switch then supplies power to the output capacitor, refilling it until it reaches the desired output voltage.

In order to control the switching of these transistors, the AP65352SP-13 has an internal voltage loop with a feedback circuit. This senses the output voltage and compares it to a target voltage. If the output voltage is lower than the target, the switch transistors are actuated to increase the output voltage. Similarly, when the output voltage is too high, the switch transistors are actuated to lower the output voltage. By rapidly switching the transistors, the output voltage is held to a steady level.

Overall, the AP65352SP-13 is an excellent choice for engineers looking for a simple and cost effective solution to their power needs. It offers a wide range of key features, such as a high maximum output current, a wide input voltage range and an adjustable output voltage level. It is also efficient and integrates protection features such as current limiting and thermal protection. All these features make the AP65352SP-13 an ideal choice for a huge range of applications, including automotive, industrial, consumer and mobile.

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