PT78NR212ST

Voltage - Output 3:	--
Base Part Number:	PT78NR212
Size / Dimension:	1.01" L x 0.93" W x 0.41" H (25.7mm x 23.6mm x 10.4mm)
Package / Case:	3-SMD Module
Mounting Type:	Surface Mount
Efficiency:	78%
Operating Temperature:	0°C ~ 85°C
Features:	OTP, SCP
Applications:	ITE (Commercial)
Current - Output (Max):	1A
Series:	PT78NR200
Voltage - Output 2:	--
Voltage - Output 1:	-12V
Voltage - Input (Max):	15V
Voltage - Input (Min):	9V
Number of Outputs:	1
Type:	Non-Isolated PoL Module
Part Status:	Obsolete
Packaging:	Tape & Reel (TR)

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DC DC Converters

DC-to-DC converters are used to convert a direct current (DC) voltage from one voltage level to another. They are widely used in many different industries, from telecommunications to automotive and solar energy systems. The PT78NR212ST is a high-efficiency, wide-input voltage range DC-to-DC converter specifically designed for modern low-power applications. This device can be used in many different applications, such as to control LED lights, regulate motor speed, and provide power supplies for processor cores in consumer and industrial applications.In this article, we will discuss the PT78NR212ST\'s application field and working principle in more detail.

Application Field

The PT78NR212ST is an integrated DC-to-DC converter based on the synchronous-buck architecture. It is designed for a wide range of input voltages, from 4.5V up to 30V, and can support up to 2.1A of output current. It is ideal for modern low power applications, such as powering LED lights, motor speed control and power supplies for processor cores.The PT78NR212ST is a monolithic device, meaning that all of its components are integrated into a single chip. This makes the device very compact and efficient, while still providing high levels of performance. Additionally, the device has high-efficiency, wide-input voltage range, and low stand-by power consumption making it an ideal choice for many different types of applications.

Working Principle

The PT78NR212ST is based on a synchronous-buck architecture, which uses two switches to transfer energy from an input source to an output load. In this architecture, a high-side switch and a low-side switch are used, with the low-side switch connected to ground. The high-side switch is used to transfer energy from the input source to the output load, while the low-side switch is used to recreate the negative half-cycle of the output voltage. This is done by connecting the low-side switch to ground, which creates a loop of alternating current, known as a continuous conduction mode. In this mode, the switches operate alternately, allowing the energy to be transferred from the input source to the output load without any losses.The PT78NR212ST also has a built-in under-voltage lockout circuit, which prevents the device from operating at voltages lower than a pre-determined level. This is important, as it prevents damage to the device from being caused by low input voltages. The device also has a range of adjustable features, such as the switching frequency, output current, and duty cycle, which can be used to optimize the performance of the device.

Conclusion

The PT78NR212ST DC-to-DC converter is a high-efficiency, wide-input voltage range device specifically designed for modern low-power applications. It is based on the synchronous-buck architecture and features a range of adjustable features, a built-in under-voltage lockout circuit, and a monolithic design for improved efficiency and performance. The device is ideal for powering LED lights, regulating motor speed, and providing power supplies for processor cores in consumer and industrial applications.

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