NCP81071ADR2G

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The NCP81071ADR2G is a low-voltage high-current gate driver designed for automotive Power Management IC (PMIC) applications such as lighting, safety, and other engine operating subsystems. This discrete driver features two integrated high-side outputs and two low-side outputs in a compact 3.3 mm x 3.3 mm package. It also offers protection features that make it ideal for automotive applications, including an adjustable Under-Voltage Lockout (UVLO), over-current protection, and short-circuit protection.

Application Field

The NCP81071ADR2G gate driver is designed for automotive PMIC applications requiring high current capability. It is used in applications such as motor controllers, power windows, and power steering, fuel pumps, HVAC systems, lighting and safety systems, and engine control systems. Furthermore, its integrated protection features make it suitable for applications in harsh automotive environments where high levels of protection are required.

Working Principle

When triggered by an external voltage, the NCP81071ADR2G gate driver acts as a switch to control the flow of current in a circuit. It is designed to provide high voltage and current capability while still protecting the system from faults. It features two high-side outputs and two low-side outputs, each of which can drive up to ±25V and 250mA of current.

The device offers adjustable user settings to provide protection against under-voltage, over-current, and short-circuit conditions that may arise during system operation. The under-voltage lockout (UVLO) can be adjusted over a wide range of 3.2V to 28V, while the over-current protection (OCP) can be set from 4A to 9A. Additionally, the device has an external latch to enable or disable the outputs from an external logic signal.

The device also includes a thermal shutdown mechanism to protect the device from overheating. If the junction temperature of the NCP81071ADR2G driver exceeds 150°C, the device will shutdown and the outputs will be disabled to protect from damage. The device will automatically reset once the temperature drops below 135°C.

Conclusion

The NCP81071ADR2G is an ideal gate driver for automotive applications requiring high current capability with the added benefit of integrated protection features. It features two high-side and two low-side outputs with adjustable user settings to provide protection against under-voltage, over-current, and short-circuit conditions. Additionally, it has thermal shutdown capabilities to protect the device from overheating.

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