STR-W6765N

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Power Management ICs (PMICs) are critical to the performance of today’s consumer electronics devices. The STR-W6765N is an offline switching regulator that efficiently and reliably provides a constant output voltage to multiple load types. It provides voltage and current control as well as overvoltage protection, allowing the power device to switch off at a certain voltage level, protecting the load from damage. Additionally, the device has low standby power and a temperature compensation feature, making it ideal for use in a variety of environments.

STR-W6765N Application Fields

The STR-W6765N application field covers both switch mode and linear power supplies for various consumer products, including mobile phones, notebook computers, televisions, and digital audio players. This device is also well suited for providing power to white goods, such as refrigerators and air conditioners, due to its high output current and wide input voltage range.

The device is a highly efficient and cost-effective solution for emerging applications in wearable and Internet of Things (IoT) devices, where low power dissipation and high efficiency are critical. Additionally, the low standby power of the device, combined with its overvoltage protection feature, make it an ideal choice for regulated power supply solutions.

The STR-W6765N supports a variety of operating modes, including low-dropout (LDO), buck mode and pulse width modulation (PWM) control. This allows the device to easily accommodate changing load conditions and to control the output voltage quickly and accurately.

STR-W6765N Working Principle

The STR-W6765N operates as a flyback converter with integrated high-side MOSFET in synchronous rectification mode. The integrated MOSFET provides the power switch required for the buck converter operation. The MOSFET is turned on and off in synchronization with the oscillator frequency.

The output of the device is controlled by an internally generated clock, which is set by the user using the voltage feedforward and clock select pins. The output voltage is then regulated using an internal control loop, which compares the error signal between the set voltage and the actual voltage, and adjusts the duty cycle accordingly.

The overvoltage protection circuitry of the STR-W6765N monitors the output voltage, and turns off the power switch and disables further operation of the device when the voltage rises above the overvoltage threshold. This ensures that the loads connected to the device are protected from damage.

The temperature compensation feature of the device prevents the output voltage from varying significantly with changes in temperature. This ensures that the power supply remains stable and reliable even over wide ambient temperature ranges.

Conclusion

The STR-W6765N is a highly efficient and cost-effective offline switcher that provides a constant output voltage in a variety of applications, including mobile phones, notebook computers, televisions, digital audio players, white goods, wearable and IoT devices. It provides voltage and current control, as well as overvoltage protection, and also features low standby power and temperature compensation for reliable performance in a variety of environments.

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