PT6937A

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DC-DC converters are widely used in diverse application fields, ranging from computer systems, communication systems, automotive systems and industrial control systems to power supplies used in consumer electronics. The wide range of different applications necessitates high flexibility in watts, volts and amperes to meet the varying demands of different products. The PT6937A DC-DC converter was designed to meet the industry’s needs for enhanced power conversion performance and reliability in cases where space and power requirements are extreme such as in industrial fields. This paper presents the application fields and working principle of the PT6937A converter.

Application Fields of PT6937A

The PT6937A is a 60V voltage regulator operates with a wide input voltage range from 4.5V to 60V and outputs 0.997V to 60V. It is suited for high-precision power voltage conversion, especially for industrial systems requiring extreme power stability in an extremely small size. The PT6937A supports a wide range of input currents ranging from 0.25A to 5A, and up to 95% power efficiency.

The PT6937A is an ideal solution for a number of applications, such as embedded industrial control, automotive, communications, industrial control and consumer electronics. It is also widely used in multiple-rail systems (eg, 24V, 5V, 3.3V and 1.2V), as well as in low-noise, low-power applications such as telecom base stations and medical equipment. The ultra-small package is suitable for all applications where cost and space savings are essential.

Working Principle of PT6937A

The PT6937A is a synchronous buck DC-DC converter, providing highly efficient, low noise and high output voltage accuracy from a wide input voltage. The PT6937A takes advantage of controlled on resistance (Rds) components TO-3, such as FETs, which are connected at the input side of the converter. The FETs are controlled with a single digital pin, enabling the converter to be efficient up to 95%.

The PT6937A integrates the maximal average current (MAC) and Pulse Frequency Modulation (PFM) control scheme as two separate control loops. The pulse width modulation (PWM) principle is adopted in the MAC control loop, which is responsible for the output voltage regulation. On the other hand, the PFM control loop is responsible for reducing the output voltage ripple. Both these control loops work together to optimize the performance of the converter. In addition, the PT6937A utilizes a low-impedance synchronous rectifier in the output stage to allow for higher efficiency and higher output voltage accuracy.

The PT6937A supports a wide range of operating conditions, including output voltages, input voltages, output current, input current, and output voltage accuracy. It also provides protection from over-voltage (OVP), over-temperature (OTP) and short circuit (SCP). The PT6937A comes with a wide selection of power solutions to match different end products’ power requirements.

Conclusion

The PT6937A is a highly efficient and reliable DC-DC converter designed for a variety of purposes, ranging from embedded industrial control to automotive and consumer electronics. Its wide range of input and output voltages, as well as its high efficiency and low noise performance make it an ideal solution for power supply applications. Its MAC and PFM control scheme ensures a high level of accuracy and stability, while its low impedance synchronous rectifier results in improved efficiency and accuracy. Finally, its wide selection of power solutions allows for a custom power solution that perfectly suits the customers’ needs.

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