TPS51117PWG4

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TPS51117PWG4 is a 2A low-voltage synchronous step-down DC-DC switch controller optimized for high-performance, efficient, low-power applications. It is a versatile and highly integrated switch controller that can reduce the external components required. This article will discuss the application field and working principle of TPS51117PWG4.

The TPS51117PWG4 is designed for high-performance, energy-efficient applications for circuit frames that require motor drive and system load supply. It can reduce the size of the power circuit and extend the system load working time. Its main applications include portable computing devices, mobile handsets and communication devices, digital cameras, personal navigators, MP3 players, flat TVs, LCD poster players, and streaming TVs.

TPS51117PWG4 is a low-voltage, high-efficiency synchronous step-down DC-DC switch controller. It is a versatile, highly integrated switch controller that can reduce the external components required. Its features include a low-voltage input operating range of 3.2V to 5.5V, a high-frequency peak oscillator of 375kHz, and an adjustable soft-start mode. It also includes on-chip protection such as over-current protection (OCP) and thermal shutdown protection (TSD).

The TPS51117PWG4 has a synchronous rectifying design with an internal low-side N-channel MOSFET and an external high-side P-channel MOSFET. This design increases power efficiency and reduces power dissipation and cost compared to other designs. In addition, it has an adjustable soft-start mode which can reduce inrush current at start-up and provide a smooth transition when the controller is enabled.

The working principle of the TPS51117PWG4 is based on a synchronous rectifying structure. It uses an internal N-channel MOSFET as a low-side switch and an external P-channel MOSFET as a high-side switch. The controller also has an internal peak oscillator to control the frequency of the switching cycle. During the off cycle, the N-channel and P-channel MOSFETs are held off, allowing the output voltage to reach its target level. During the on cycle, the high-side MOSFET is turned on and the output voltage is regulated according to the oscillator cycle.

In summary, the TPS51117PWG4 is a low-voltage, high-efficiency synchronous step-down DC-DC switch controller. It is designed for high-performance, energy-efficient applications for circuit frames that require motor drive and system load supply, and can reduce the size of the power circuit and extend the system load working time. Its working principle is based on a synchronous rectifying structure. It uses an internal N-channel MOSFET as a low-side switch and an external P-channel MOSFET as a high-side switch, and has an internal peak oscillator to control the frequency of the switching cycle.

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