PT6505C

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DC-DC converters have a wide range of applications in the industry, from simple voltage level shifting to high-frequency switching power supplies providing power conditioning and isolation. The PT6505C from Power Tree Technology is a versatile, advanced DC-DC converter, designed for use in industrial and commercial applications.

The PT6505C is a regulated step-down converter that accepts an input voltage of up to 32V, and provides an output voltage adjustable from 0.8V to 28V. The efficiency of the converter is 95%, and the output current is limited to 5A. The convergence time is less than 1.0ms, and the ripple and noise are as low as 50mVpp. It also features built-in protection against overcurrent, overvoltage, thermal overload, and short circuit conditions.

The PT6505C has a wide operating temperature range of -40°C to +85°C. Additionally, it offers a wide range of operating modes, including non-dimming LED applications and step-down conversion. This flexibility makes it suitable for a variety of industrial and commercial applications, such as automotive, industrial, medical, and aerospace applications. The converter is also RoHS compliant and offers EMC certification.

The PT6505C has an advanced high-frequency, synchronous buck architecture. The converter utilizes a pulse width modulation (PWM) scheme, which controls the output voltage. The PWM scheme produces a square wave whose pulse width determines the output voltage. The converter uses a 4-switch architecture to create a high frequency, low noise, high efficiency switched-mode power supply. This application of high-frequency switching technology makes the PT6505C both very efficient and very small.

The typical application circuit of the PT6505C is shown in the figure below. The device can be used in either step-down or step-up configuration, depending on the components chosen. The PT6505C has four input pins (Vin, Vout, feedback, and shutdown), two MOSFET driver outputs (PWM and GND) as well as GND, and a clock input.

The feedback pin is used to control the output voltage. The voltage on the feedback pin is compared to a 1.2V reference voltage provided by an on-board bandgap reference. If the voltage on the feedback pin is higher than 1.2V, the output of the PWM will be high, and the switched-mode supply will operate in step-down mode. Similarly, if the voltage on the feedback pin is lower than 1.2V, the output of the PWM will be low, and the switched-mode supply will operate in step-up mode.

The shutdown pin is used to shut down the converter when it is not in use. When in shutdown mode, the converter consumes less than 1μA. The clock input is used to synchronize the internal oscillator and minimize the switching frequency. The output of the driver MOSFETs can be used to drive external MOSFETs, allowing the output current to be limited.

The PT6505C is a versatile, advanced DC-DC converter designed for industrial and commercial applications. It provides an adjustable output voltage from 0.8V to 28V, with a high efficiency of 95%. The converter also offers a wide temperature operating range of -40°C to +85°C, with built-in protection against overcurrent, overvoltage, thermal overload, and short circuit conditions. The advanced high-frequency, synchronous buck architecture is both efficient and very small, making the PT6505C a great choice for a variety of industrial and commercial applications.

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