PT6345A

Voltage - Output 3:	--
Base Part Number:	PT6345
Size / Dimension:	--
Package / Case:	12-SIP Module
Mounting Type:	Through Hole, Right Angle
Efficiency:	87%
Operating Temperature:	-40°C ~ 85°C
Features:	--
Applications:	ITE (Commercial)
Current - Output (Max):	6A
Series:	Excalibur™ PT6340
Voltage - Output 2:	--
Voltage - Output 1:	1.5V
Voltage - Input (Max):	13.2V
Voltage - Input (Min):	10.8V
Number of Outputs:	1
Type:	Non-Isolated PoL Module
Part Status:	Obsolete
Packaging:	Tray

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Sep 20, 2020

DC DC Converters

A DC-DC converter is a device that changes the voltage of a direct current (DC) source, such as a battery or wall outlet. It can convert a lower voltage to a higher voltage or a higher voltage to a lower voltage. It is a common energy conversion technology used in a wide range of applications, such as mobile phones, computers, automotive and industrial automation. Among the DC-DC converters, the PT6345A is a DC-DC Step-Down converter. It is designed for point-of-load (POL) buck converters used in a wide range of applications such as Telecom, Enterprise Server, GPU and Data Center where high performance, high efficiency and tight regulation is essential.

PT6345A Application Field

The PT6345A is especially suited for Telecom and Enterprise Server applications as it has high-end features including advanced dynamic-phase-shift technology, on-the-fly load line adjustment and load current scaling for outstanding load regulation. It also has a wide input voltage range from 2V to 15V and output current of up to 2A. The maximum efficiency of this step-down regulator is up to 95%.The PT6345A is also suitable for GPU and Data Center applications as it has integrated high-frequency overcurrent protection, reliability monitoring, temperature protection, voltage balance and overvoltage protection. It also supports the lowest minimum on-time and a programmable current-limit setting while achieving a very fast transient response time.

PT6345A Working Principle

The PT6345A comes with an integrated full-bridge driver, high voltage and multimode switch, and advanced digital enable control. It is designed to generate Vin-related auxiliary voltage for off-line applications. When Pt6345A is powered up, it first enters the enable mode. The PWM signals generated by the internal oscillator circuits open and close the two control switches in alternation, thus extracting energy from the input voltage, and converting it into the output. This result in a charge-discharge cycle of the inductor, thus generating the output voltage. Once the PWM signals are triggered and the two control switches are closed, the voltage across the two control switches forms a voltage divider network. This feature reduces the voltage applied to the gate of the high side switch, and thus increases the output regulation linearity and efficiency. The output voltage is monitored by an internal compensation circuit. When the output voltage drops below the preset regulation voltage, the frequency will be changed to increase the energy stored in the inductor and result in higher output voltage. The frequency of the PWM signal is not affected by the load current, which gives the PT6345A a low output impedance and a very fast transient response.

Advantages

The PT6345A has many advantages that make it a popular choice for a variety of applications. It offers high efficiency, superior stability and fast conversion speed. It also has integrated features for reliability and protection, such as overcurrent protection, temperature protection, voltage balance and overvoltage protection. The integrated full-bridge driver and high voltage switch allow the user to achieve the highest efficiency point while maintaining the lowest input voltage. In addition, the PT6345A has programmable current limitation, low minimum on-time and adjustable loop stability, making it easy to customize for specific applications. The small package size of the Pt6345A makes it easy to design into small form factor systems.

Conclusion

The Pt6345A is a high-performance, high-efficiency point-of-load DC-DC step-down converter. It is a popular choice for Telecom and Enterprise Server applications due to its high efficiency, superior stability, and fast conversion speed. It is also suitable for GPU and Data Center applications. Its features, such as overcurrent protection, temperature protection, voltage balance, and overvoltage protection, make it reliable and suitable for various applications. The advanced digital enable control, programmable current limit and adjustable loop stability enable the user to customize the Pt6345A for their specific applications.

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