LT8705AIUHF#TRPBF Application Field and Working Principle

LT8705AIUHF#TRPBF belongs to PMIC (Power Management ICs), and specifically to Voltage Regulators and DC DC Switching Controllers. It is a high performance switching controller IC designed to provide high current output, accurate power delivery and wide input voltage range, while substantially reducing external component count and complexity. Therefore it is ideal for portable and low-power applications.

Application Field

LT8705AIUHF#TRPBF is used in several applications such as input power sources, USB power management, secondary power bussing, bulk conversion, mobile phones, and other portable electronic devices and many more. It is available in two distinct versions for buck and dual buck applications where differing output currents are present.

In addition to that it can be used to provide DC regulation of outputs and is suitable for applications such as embedded Fan controllers, active power factor correction, single phase AC/DC converters and multi phase DC/DC converters.

Working Principle

LT8705AIUHF#TRPBF utilizes the concept of voltage regulation to control the output. The output voltage is predetermined by the reference voltage. The device operates in fixed-frequency mode, which reduces switching ripple stress to the surrounding components and increases system efficiency.

It uses Pulse Width Modulation (PWM) to control the output current. The PWM control is done by the input of the Error Amp with a minimum duty cycle. After the duty cycle has been set, the power stage runs through various cycle steps and the output voltage is monitored. The output voltage is compared with the reference voltage, and the duty cycle is adjusted accordingly.

The whole operation of the LT8705AIUHF#TRPBF is regulated by the power measurement device. This device measures the fundamental or total harmonic distortion of the output voltage. The power measurement device also helps to maintain a highly efficient and accurate power delivery.

Conclusion

LT8705AIUHF#TRPBF is an efficient switching controller IC widely used in voltage regulation and power balancing applications. It can be widely used in mobile phones, fan controllers, and other portable electronic devices. Its features such as wide output voltage range, accurate power delivery, and low external component count, make it an ideal choice for self-powered applications.