EMC Component Reuse | PartQuest™ Explore

NCV8876 - Circuit Showing EMC Component Reuse Darrell

Darrell
Designer10

Darrell

Member for

10 years 5 months

624

designs

10

groups

Big fan of VHDL-AMS

Description

This is a reference design for the ON Semiconductor NCV8876 Start-Stop Boost Controller (http://www.onsemi.com/pub_link/Collateral/NCV8876-D.PDF). It shows the reuse of a typical module's EMC components (i.e. the "pi" filter), which can serve a dual purpose as part of the boost converter. This includes the 4.7uF and 10uF capacitors, and the 1uH soft-saturation inductor.The NCV8876 is designed specifically for this application, requiring a minimum of new external components. These include the NMOS switch, the Schottky rectifier diode and the 0.011 Ohm current sense resistor. It also includes a few peripheral passives, such as the simple current-mode compensation network and the frequency programming resistor r9. The switching frequency can be adjusted to accommodate the available EMC component values.Simulation results show the output to the 5W load during battery drop-out and recovery. Note that in this application, the output voltage (red waveform) is maintained above 6.0V during the drop-out transient, and regulates at 6.8V as the input voltage at the PCB drops to a minimum value of 3V (light blue waveform).An alternate implementation reference design, with higher efficiency for higher power loads, is provided in the companion design: https://www.systemvision.com/design/ncv8876-power-saving-diode-bypass-circuit

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2 MOSFET circuit for alternate bypass

Mike Donnelly
Designer19

Mike Donnelly

Member for

10 years 5 months

1,546

designs

10

groups

Member of the PartQuest Explore Development Team. Focused on modeling and simulation of analog, mixed-signal and multi-discipline systems covering a broad range of applications, including power electronics, controls and mechatronic systems.

NCV8876 - Circuit for alternate bypass development

Mike Donnelly
Designer19

Mike Donnelly

Member for

10 years 5 months

1,546

designs

10

groups

Member of the PartQuest Explore Development Team. Focused on modeling and simulation of analog, mixed-signal and multi-discipline systems covering a broad range of applications, including power electronics, controls and mechatronic systems.

NCV8876 - Circuit Showing EMC Component Reuse

Mike Donnelly
Designer19

Mike Donnelly

Member for

10 years 5 months

1,546

designs

10

groups

Member of the PartQuest Explore Development Team. Focused on modeling and simulation of analog, mixed-signal and multi-discipline systems covering a broad range of applications, including power electronics, controls and mechatronic systems.

Description

This is a reference design for the ON Semiconductor NCV8876 Start-Stop Boost Controller (http://www.onsemi.com/pub_link/Collateral/NCV8876-D.PDF). It shows the reuse of a typical module's EMC components (i.e. the "pi" filter), which can serve a dual purpose as part of the boost converter. This includes the 4.7uF and 10uF capacitors, and the 1uH soft-saturation inductor.The NCV8876 is designed specifically for this application, requiring a minimum of new external components. These include the NMOS switch, the Schottky rectifier diode and the 0.011 Ohm current sense resistor. It also includes a few peripheral passives, such as the simple current-mode compensation network and the frequency programming resistor r9. The switching frequency can be adjusted to accommodate the available EMC component values.Simulation results show the output to the 5W load during battery drop-out and recovery. Note that in this application, the output voltage (red waveform) is maintained above 6.0V during the drop-out transient, and regulates at 6.8V as the input voltage at the PCB drops to a minimum value of 3V (light blue waveform).An alternate implementation reference design, with higher efficiency for higher power loads, is provided in the companion design: https://www.systemvision.com/design/ncv8876-power-saving-diode-bypass-circuit

About text formats

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DarrellDesigner10

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Mike DonnellyDesigner19

Member for

Mike DonnellyDesigner19

Member for

Mike DonnellyDesigner19

Member for

Darrell
Designer10

Mike Donnelly
Designer19

Mike Donnelly
Designer19

Mike Donnelly
Designer19