LM5166YDRCR

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LM5166YDRCR is a multi-phase driver for high-current, high-efficiency DC-DC switching regulators. It combines four MOSFET drivers, two of which can be used in a cascaded-inverter configuration to provide independent control over two switching supply voltages. The voltage regulator offers a wide input voltage range from 4.5V to 28V and provides an adjustable current-limit setting. It also features active clamping (buck/boost) and is suitable for a variety of industrial, medical, and consumer applications.

Overview of the LM5166YDRCR

The LM5166YDRCR is a four-phase multi-output controller and driver for high-current switching power supplies. It is designed to provide independent control over two switching supply voltages, to minimize inherent losses between the power supply’s MOSFETs and their secondary stages, and to reduce electromagnetic interference (EMI) from the supply. The integrated MOSFET drivers are capable of controlling two independent high-side and two independent low-side or two cascaded-inverter output supplies for greater power density.

Aside from providing a cost-effective solution to multiple output configurations, the LM5166YDRCR also features an input voltage range of 4.5V to 28V, an adjustable current limit setting of 22mA to 440mA, soft-start/on-off sequencing and blanking, adjustable deadtime and peak-current limit, and an enable pin for system sequencing control. The regulator also includes an automatic power-good output signal and a regenerative short-circuit protection.

Applications of the LM5166YDRCR

The LM5166YDRCR is suitable for a variety of consumer, industrial, and medical applications, such as point-of-load converters, micro-controllers (MCUs), digital signal processors (DSPs), AC/DC rectifiers, telecommunications, server and storage systems, GPU/FPGA power systems, RF power amplifiers (PA), LCD backlighting applications, and embedded systems.

Working Principle of the LM5166YDRCR

The LM5166YDRCR is a three-stage switching regulator consisting of a controller IC, two driver ICs, and two MOSFETs. The controller IC provides the main regulation of the output voltages while the two driver ICs control the on/off switching of the power MOSFETs. The controller IC communicates with the two drivers via a pulse-width modulation (PWM) signal. The PWM signal is generated in the controller IC and is used to regulate the switching of the power MOSFETs in order to obtain the desired output voltage.

The output voltage is compared to an internal reference voltage, and the controller IC adjusts the duty cycle of the PWM signal in order to maintain the output voltage within the designated range. The controller IC also monitors the load current and adjusts the PWM duty cycle accordingly to maintain the current in the safe operating range. The two drivers in the LM5166YDRCR are used to drive both the high-side and low-side power MOSFETs, and the switching is controlled by the PWM signal.

The LM5166YDRCR has an adjustable current limit and an adjustable soft-start feature that can be used to sequence multiple supplies and to control the inrush current. The adjustable deadtime and peak-current limit features are used to prevent peak current and to reduce EMI emissions. The integrated active clamp feature can be used to generate a regulated output voltage in buck-boost applications.

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