PT6121G

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DC DC Converters

DC to DC converter or DC power supply is an electric power converting device that changes a source of direct current (DC) from one voltage level to another level. Usually, the input voltage is higher than the output one. Aptly used in various industrial applications, DC to DC converters are of paramount importance in today’s world.

The PT6121G is a popular DC to DC converter. It is a highly integrated converter known for its high performance, excellent power and voltage regulation control, wide input voltage range, low leakage current, high efficiency, and low quiescent current. This converter can accept an input voltage of between 2.3V to 12V, with a regulated output voltage ranging from 0.8V to 5V. It is a low cost, small size, and low profile solution and is widely applicable in portable electronic products.

Working Principle of PT6121G

The PT6121G converter integrates a buck-boost controller and setting circuit with two MOSFETs for input and output. In buck-boost mode, the PT6121G can provide continuous output current up to 1.5A by drawing the power from either the input or the output side and effectively regulating the output voltage in the range from 0.8V to 5V. The PT6121G constantly monitors the DC output voltage and adjusts the duty cycle of the continuous pulse-width modulation (PWM) signal driving the MOSFETs to regulate the output voltage. Depending on the duty cycle of the PWM signal, the input voltage either boosts the output voltage or reduces it.

The PT6121G converter also features a low standby current sink setting that prevents the input voltage rising when the converter is in the standby mode. With lower input quiescent current and higher efficiency, the PT6121G minimizes the average current and the total energy consumption. Moreover, the use of built-in compensation techniques for over-current protection and thermal shutdown makes the PT6121G converters more reliable and safe.

Applications of PT6121G

The PT6121G can be used in many situations, such as for powering digital cameras, portable video players, PDA (personal digital assistants), cell phones, and portable gaming consoles. It can also be used as a bias power supply for various audio amplifiers, self-powered systems, and optical communication systems. The PT6121Gs low leakage current, wide input voltage range, and higher side-step capability allow it to fit in a variety of applications, while its low noise operation and micro-power standby mode make it suitable even for battery-operated applications.

With its excellent performance, great efficiency, and wide voltage range, the PT6121G proves to be a reliable and stable source of power for many applications. Its high power efficiency, accurate regulation, advanced protection features, and low leakage current make it an ideal solution for powering consumer electronics.

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