SPICE MODEL of TN41A in SPICE PARK. English Version is http://www.spicepark.net. Japanese Version is http://www.spicepark.com by Bee Technologies.

1. Device Modeling Report
COMPONENTS: Programmable Unijunction Transistor
PART NUMBER: TN41A
MANUFACTURER: TOSHIBA
Bee Technologies Inc.
All Right Reserved Copyright Bee Technologies Inc. 2005

2. Pspice model
Model description
parameter
IS Saturation Current
ISE Non-ideal Base-Emitter Diode Saturation Current
RC Series Collector Resistance
TR Reverse transit time
TF Forward Transit Time
Equivalent circuit
A
QPNP-D G
QNPN-D
K
All Right Reserved Copyright Bee Technologies Inc. 2005

3. Peak Voltage (Vp) and Peak Current (Ip) Characteristics
Peak voltage and current (Vp,Ip)
12V
(1.9880u,11.038)
Simulation
8V
Valley point (Min.peak)
4V
Vv=0.4939V, Iv=24.368uA
(24.368u,493.902m)
0V
0A 20uA 40uA 50uA
V(A)
I_I1
Simulation Result
Vp=11.038(V) at Ip=2u(A)
SPEC: Vp=10.2(V) to 11.6(V) at Ip(max.)=2u(A)
Forward Voltage Characteristics
12V
11.038)
8V
Vf=1.500V at IF=50mA
4V
(50.000m,1.5000)
93.902m)
0V
0A 20mA 40mA 50mA
V(A)
I_I1
Simulation Result
Vf=1.5(V) at If=50m(A)
SPEC: Vf=1.5(V)MAX. at If=50m(A)
All Right Reserved Copyright Bee Technologies Inc. 2005

4. Voltage and Current Characteristics Reference
Evaluation Circuit
RG
{Rpr g}
I1
VS
0 0
0
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5. Pulse Output Voltage and Pulse Output Rise Time
Vo=6.619(V) at Vi=20(V), Ct=0.2u(F)
SPEC: Vo=6(V) to 10(V) at Vi=20(V), Ct=0.2u(F)
tr=70.1(ns) at Vi=20(V), Ct=0.2u(F)
SPEC: tr=70(ns) to 80(ns) at Vi=20(V), Ct=0.2u(F)
Evaluation circuit
R5 R3
510k 16k
V1
20V dc
0
OUT
R4
R6
C1 27k
20
0.2u
IC = 12.91
0
All Right Reserved Copyright Bee Technologies Inc. 2005