NCP5351DR2G

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NCP5351DR2G is a high-efficiency, full-bridge driver with integrated high- and low-side MOSFETs, heavy-duty drain clamps, a choice of output voltage thresholds, programmable outputs, as well as adjustable current limiting and over-temperature protection. As an integrated power management IC (PMIC) – Gate Driver, this device is designed for switchmode power supplies with isolated output voltages down to 40 V. It is optimized for both automotive and industrial applications and is available in 555-lead, 8 mm x8 mm x 0.8 mm leaded DFN and VQFN packages.

Application Field

The NCP5351DR2G is ideal for automotive, motor control, and industrial applications. It is intended for high frequency switchmode power supplies, load switches, and current sensing/limiting circuits. Examples of applications are:

• Switchmode power supplies with isolated output voltages down to 40 V.
• Isolation amplifiers and cascode amplifiers.
• Boost and buck converters.
• Bidirectional magnetics.
• DC motor drives.
• Defibrillators.
• Power-factor correction.

Working Principle

The NCP5351DR2G is designed with advanced features to reduce power dissipation and increase system efficiency. It features integrated high- and low-side MOSFETs with a gate drive current capability reaching up to 1.5 A and employing a frequency-compensated hysteretic current-limited architecture. The current limitation is user programmable, ranging up to 1.6 A. Furthermore, an over-temperature protection algorithm is integrated that prevents damage to the device due to excessive junction temperatures.

The NCP5351DR2G features an adjustable low-side PMOSFET gate drive voltage suitable for the highest voltage requirements. The output’s deadtime can be externally adjusted up to 360 ns to reduce electromagnetic radiation, and the choice of output voltage thresholds makes the chip compatible with any switchmode power supply scheme. Furthermore, the chip can also be used for load switches, as it supports both push-pull and low-side switch configurations.

The NCP5351DR2G comes with several added benefits, including low power consumption and a low ground current in stand-by mode. An additional feature is the propagation delay of both high- and low-side MOSFETs, that increases system reliability.

In conclusion, the NCP5351DR2G is a low-power, high-efficiency, full-bridge driver with integrated high- and low-side MOSFETs, heavy-duty drain clamps, and adjustable outputs. It is specifically designed for switchmode power supplies and isolation amplifiers, but can also be used for buck, boost, defibrillators, Power-factor correction, and many other applications.

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