SPICE subcircuitTIP120Gtip120
TIP120 (NPN Darlington, 60 V 5 A)
Darlington power transistor in TO-220 with built-in base resistors and damper diode: current gain above 1000, so a few mA from a logic pin switch amperes. Drop when on about 1–2 V (more heat than a logic-level MOSFET).
Key data
- Category
- Semiconductors
- Simulation model
- SPICE subcircuit
- Manufacturer part number
- TIP120G
- Reference prefix
- Q
- Pins
- 3
- Land pattern
- TO-220-3_Vertical
Simulation model
The part is a small SPICE netlist (below), solved by the analog engine together with the rest of the circuit. Pin ids are the node names, {braces} are parameters.
SPICE netlist
Q1 C B e1 QTIP120D
Q2 C e1 E QTIP120O
R1 B e1 8k
R2 e1 E 120
D1 E C DTIP120.model QTIP120D NPN(IS=1e-13 BF=50 BR=1 VAF=100)
.model QTIP120O NPN(IS=1e-11 BF=50 BR=1 VAF=100)
.model DTIP120 D(IS=1e-12 N=1 RS=0.02 BV=60 IBV=100u)Pins 3
| Pin | Name | Use |
|---|---|---|
| C | CPassive pin | Collector: to the load (the load goes to the supply) |
| B | BPassive pin | Base: through about 1 kΩ from a logic pin |
| E | EPassive pin | Emitter: to GND (low-side switch) |
PCB
Verified land pattern
TO-220-3_Vertical| Package | Land pattern | Status | Source |
|---|---|---|---|
| TO-220 · TIP120G | TO-220-3_Vertical | Verified land pattern | KiCad Package_TO_SOT_THT:TO-220-3_Vertical; TIP120 datasheet TO-220 pinout 1 B, 2 C, 3 E |