PT6655F

DC DC Converters

DC-DC converters, also known as DC-DC power supplies, are electronic devices that convert the DC voltage of a power source from one level and output another stable DC voltage. Herein a brief introduction on thePT6655F application field and working principle is provided, to be clarified how DC-DC converters can be beneficial.

Application Field of DC-DC Converter PT6655F

The PT6655F is specifically designed for applications such as mobile phone, digital camera and so on. Due to its wide input voltage range and high output power, PT6655F is well-suited in many fields. Besides, it is a low cost and highly efficient converter with high surge current capability for meeting the transient load requirement of many applications.

Working Principle of PT6655F

PT6655F is a step-down DC-DC converter which works on the buck regulator topology. It operates at a fixed frequency and controlled by a PWM/PFM switching regulator. It consist of feedback control circuit, power switches, filter capacitor, inductor, Ne composition network, etc.

The basic working principle of the PT6655F is given below.

• The power switch is controlled by PWM/PFM signal, which will be triggered by an internal circuit.
• When both voltage and current feedbacks are higher than regulation value, the internal circuit will drive the power switch to turn on.
• When the PWM/PFM signal switches on the power switch, current begins to pass through the inductor.
• Current will flow through the inductor and then it will be stored as magnetic energy.
• When power switch turns off, the current flows through the Ne composition network to the load.
• The current flow through the load is regulated by feedback loop.
• The output voltage is filtered by a filter capacitor.

Conclusion

In conclusion, the PT6655F is specifically designed for mobile phone, digital camera and so on, due to its wide input voltage range and high output power. The PT6655F is a low cost and highly efficient converter with high surge current capability for meeting the transient load requirement of many applications. It operates at a fixed frequency and controlled by a PWM/PFM switching regulator. Finally, it stores the energy when the power switch turns off and sends the current through the load.