RT5788BGJ8F

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The RT5788BGJ8F is a multiple-purpose DC/DC switching regulator designed to be used in numerous applications. It features a high-efficiency all-MOSFET design for improved power conversion with low dissipation and low noise. The RT5788BGJ8F utilizes a unique phase-shift control scheme that enables wide output voltage adjustment with ultra-low power dissipation.

The board works in accordance with the DC/DC switching regulator topology using an on-chip, full bridge PWM controller, a pair of external power MOSFETS and the optional series inductor. An external digital control input enables the RT5788BGJ8F to operate in one of three modes – fixed frequency, current mode or pulse frequency modulation (PFM) – to provide a maximum duty cycle of 100% for wide voltage range operations. In addition, over-current protection and thermal shutdown circuitry are integrated, allowing the board to function as a standalone DC/DC controller.

The RT5788BGJ8F is designed to provide an adjustable output voltage range of 1.2V~15V, with a maximum output current of 3A. The RT5788BGJ8F works in either continuous or pulse width modulation current mode operation, and its default frequency is set to 200KHz. In addition, the board supports a wide range of input voltages from 3V to 36V.

The RT5788BGJ8F is an ideal choice for applications that require a high degree of power efficiency and wide output voltage adjustability. It is commonly used for powering circuit boards, wireless modules, ultra low power CPUs, CPU cores, and LCD inverters. It is also used for supplying multiple voltage rails with load sharing between them.

The working principle of the RT5788BGJ8F is straightforward. The board utilizes on-chip full bridge PWM modem and external power MOSFETs to convert an input voltage into a preset output voltage. The RT5788BGJ8F uses a phase-shift control topology to control the output voltage. The regulator has three different modes of operation: fixed frequency, current mode, and pulse frequency modulation (PFM). The frequency of the switching can be easily adjusted by changing the external component values.

When the voltage output is required to stay constant, the RT5788BGJ8F operates in fixed frequency mode. In this mode, the output voltage is regulated by varying the duty cycle of the pulse-width modulation (PWM) signals generated. The switching frequency of the PWM signals can be adjusted by changing the external component values. The RT5788BGJ8F utilizes current mode control to regulate the output voltage if an output voltage beyond the preset voltage range is required. This mode is configured so that the output voltage increases when the input voltage increases. In order to minimize the power dissipation, the RT5788BGJ8F also switches to PFM mode when the load current is low.

The RT5788BGJ8F is an efficient and reliable power solution for numerous applications. It combines wide output voltage adjustment, high efficiency and low power dissipation in a single board. This makes it an ideal solution for powering circuit boards, wireless modules, ultra low power CPUs, CPU cores, and LCD inverters.

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