onsemi NCV84003GPAR2G - Protected Power Switch

The NCV84003G (NCV84003GPAR2G) is a fully protected single-channel 12 V high side eFuse from onsemi's SmartGuard family, designed to replace mechanical fuses in smart power distribution and zonal architectures. With a 3.6 mΩ R_DS(on), it supports load protection up to 15 A nominal and 85 A transient, switching bulk capacitors, bulbs, solenoids, and other actuators in the 12 V automotive powernet (35 V max load dump).

Built on the same silicon and TSSOP14-EP package as the NCV84003F SmartFET, the NCV84003G adds advanced features tailored for zonal applications: a smart low-power IDLE mode with auto-transition, a dedicated capacitive load charging mode with auto-entry/exit, an adjustable overcurrent threshold, and a built-in, fully adjustable I²t profile that emulates conventional melting fuses. It is package- and pinout-compatible with the Infineon BTG7 series, offering a drop-in path with the added benefit of more flexible I²t implementation and independent load management.

The NCV84003G is ASIL B-rated (ISO 26262), AEC-Q100 qualified, and PPAP-capable, with proportional analog current sense and discrete fault levels on the CS pin for fault differentiation and configuration/status readback.

• NCV84003F = "SmartFET" - standard high-side switch
• NCV84003G = "SmartGuard" - e-Fuse with advanced zonal features (IDLE mode, capacitive charge, adjustable I²t, adjustable overcurrent)

Key features

• Adjustable intelligent I²t profile – emulates melting fuses across a continuous range (20 A down to 5 A equivalent ratings)
• Capacitive charge mode with active inrush control and auto-entry/exit
• Smart low-power IDLE mode (88 µA typ GND current at 85 °C) with auto-transition to normal mode
• Adjustable overcurrent Threshold via external AOC resistor
• ASIL B – developed in compliance with ISO 26262, full safety package available
• 3.6 mΩ R_ON (typ, 25 °C)
• Proportional analog current sense multiplexed with discrete fault output levels for fault differentiation
• Configuration and status readback on CS pin
• Absolute and Differential Thermal Shutdown (DTSD), with reduced DTSD threshold in CL mode

Applications

• Protected load switching
• Switching resistive, inductive and capacitive loads
• Fuse replacement
• Electromechanical relay replacement
• Zonal power distribution
• Zonal control unit
• Power distribution unit
• Body control modules
• Automotive safety / ADAS
• Software defined vehicles