PT6886C

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DC-DC converters are special power supply modules that convert a pre-specified, direct current voltage to another, supplying regulated levels of direct current. This enables the power device to be adapted to various specific applications according to the users\' demands. The PT6886C is one of the many miniature, step-down, switch mode DC-DC converter modules. This cost-effective, power-saving, tiny mini DC-DC converter offers an excellent combination of output-capacitance protections for optimal performance.

The PT6886C adopts a switch-mode power converter topology with a simplified circuit structure and low EMI. This structure assists in providing a remarkable high efficiency, up to 96.2%. Moreover, to be able to comply with most applications, this device features a wide input voltage range of 2.5V to 12V. Additionally, adjustable output voltage can be set up to 1.215V to 6.9V, and its maximum output current can reach up to 3.0A when the ambient temperature is 25°C.

In terms of performance, the PT6886C mini DC-DC converter is ideal for applications demanding for low voltage, high efficiency, and low timing jitter, such as cellular phones, digital cameras, PDAs, smartphones, and portable multimedia players. Moreover, the small package size of the device makes it perfect for space constrained applications. In many portable applications, its on-off control feature helps to reduce the power consumption.

The working principle of the PT6886C is based on a conventional switch-mode power converter. It works by regulating an input voltage to a desired level as output, under the operations of a power semiconductor circuit. The primary circuit of the PT6886C contains a power MOSFET, an inductor, an output capacitor, and a control IC.

The control IC stabilizes the input voltage and controls the power switch which periodically opens and closes at a given switching frequency. When the power switch closes, the energy stored inside the inductor is built up. When the power switch then opens, the stored energy in the inductor transferred to the output capacitor, providing the output voltage Vout. Finally, the current flowing through the inductor is reduced.

The power transistor of the PT6886C is designed as a current switch, allowing the total power losses to be minimized. For protection, the device utilizes an over-current protection (OCP) circuit which can be set by adjusting a resistor. Additionally, an on-off control system helps reduce the input current to zero when entering sleep mode, so that when the device is not in use, it will automatically shut off and reduce the power consumption.

In summary, the PT6886C is a highly efficient, low cost, miniature DC-DC converter suitable for most applications requiring low voltage output and low EMI. It utilizes a conventional switch-mode power converter topology which is constructed with a power MOSFET, an inductor, an output capacitor, and a control IC, and its adjustable output voltage range from 1.215V to 6.9V and maximum output current reaches up to 3.0A. With its efficient power management system, excellent output-capacitance protections, and on-off control feature, the PT6886C is an ideal component for many portable applications.

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