S8519WT

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Part Status:	Active

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Introduction

The S8519WT is an ultra-high-performance, single-phase wide-range PWM buck driver, optimized for PV systems, UPS topologies and power supplies. The device integrates a high-voltage start-up circuit, current protection and pulse-by-pulse current limiting for enhanced reliability. It supports a wide input voltage range (200 Vdc – 400 Vdc) and can source up to 80A with an internal switching frequency of 1.0 MHz. This device also offers an integrated protection circuit, which helps protect the power supply against excessive current and over-voltage conditions.

Application Field

The S8519WT offers a wide range of applications, such as solar photovoltaic systems, Uninterruptible Power Supplies (UPS), motor drives, and power supplies. In the solarPhotovoltaic (PV) sector, the S8519WT can be used in a wide variety of solar inverter designs, from multi-string up to large-scale central Solar Inverters. In the UPS sector, the S8519WT is suitable for powering off-grid, grid-tie and isolated topologies, from small to large inverters. In the motor drive sector, the device supports applications such as ac induction motor drives, brushless dc (BLDC) motor drives, and motor control applications. In the power supply sector, the S8519WT can be used in all types of ac/dc and three-phase rectification applications.

Working Principle

The S8519WT works by regulating the output voltage of the power source. This is achieved through pulse-width modulation (PWM) control. During operation, the device continuously switches power devices on and off at a pre-programmed frequency to generate a pulse train that is used to regulate the output voltage. The output voltage can be regulated by changing the width of the pulse in relation to the reference voltage. The PWM control also ensures that the output voltage is directly proportional to the reference voltage, allowing for precise control of the output voltage. The S8519WT also features an adjustable dead-time control, which helps to minimize EMI and helps to minimize loss.

Conclusion

The S8519WT is an ultra-high-performance, single-phase wide-range PWM buck driver, optimized for PV systems, UPS topologies and power supplies. It offers wide input voltage range (200 Vdc – 400 Vdc) and can source up to 80A with an internal switching frequency of 1.0 MHz. Additionally, the S8519WT works by regulating the output voltage of the power source through pulse-width modulation (PWM) control. The S8519WT can be used in a wide variety of solar inverter designs, from multi-string up to large-scale central Solar Inverters, as well as other applications such as Uninterruptible Power Supplies (UPS), motor drives, and power supplies.

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