npn

The npn is a passive, analog or power part in the LabWired part catalog. Its catalog type is npn. It has 3 pins. No device model of its own. On a signal net it is an element of the in-core analog circuit, solved next to the running firmware; wired only across supply rails (a decoupling capacitor, for example) it stays wiring only. Semiconductor models are large-signal, with no device capacitance.

From the catalog: Ebers-Moll BJT in the in-core MNA (Q line). Large-signal DC only: no junction or diffusion capacitance, no Early effect, no temperature model.

Key facts

What LabWired simulates

npn pinout

• GPIO: B
• Other signals: C, E

How to simulate the npn in LabWired

1. Open the Playground at app.labwired.com and place an MCU board.
2. Add the npn (catalog type npn).
3. Connect B to a free GPIO pin.
4. Connect C and E as your circuit needs.
5. Run the firmware. When the part is in an analog circuit, as described above, the in-core analog solver computes it next to the firmware.

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Modelled from ON Semiconductor 2N3904 transistor datasheet.