This document contains a SPICE model for the U1GC44 general purpose rectifier diode manufactured by Toshiba. It provides the model parameters and compares circuit simulation results to measurement data for the forward current characteristic, junction capacitance characteristic, and reverse recovery characteristic. The simulations match the measurements well with less than 3% error.

1. All Rights Reserved Copyright (C) Bee Technologies Inc. 2004
COMPONENTS:
DIODE/ GENERAL PURPOSE RECTIFIER/ SATANDARD
PART NUMBER: U1GC44
MANUFACTURER: TOSHIBA
Device Modeling Report
Bee Technologies Inc.

2. All Rights Reserved Copyright (C) Bee Technologies Inc. 2004
SPICE MODEL
PSpice model
parameter
Model description
IS Saturation Current
N Emission Coefficient
RS Series Resistance
IKF High-injection Knee Current
CJO Zero-bias Junction Capacitance
M Junction Grading Coefficient
VJ Junction Potential
ISR Recombination Current Saturation Value
BV Reverse Breakdown Voltage(a positive value)
IBV Reverse Breakdown Current(a positive value)
TT Transit Time
EG Energy-band Gap
*$
* PART NUMBER: U1GC44
* MANUFACTURER: TOSHIBA
* All Rights Reserved Copyright (C) Bee Technologies Inc. 2004
.MODEL U1GC44 D
+ IS=1.7648E-9
+ N=2.2288
+ RS=42.869E-3
+ IKF=49.818
+ ISR=0
+ CJO=24.060E-12
+ M=.36073
+ VJ=.44127
+ BV=400
+ IBV=10.000E-6
+ TT=4.4435E-6
*$

3. All Rights Reserved Copyright (C) Bee Technologies Inc. 2004
D1
U1GC44
R1
0.01m
V1
0Vdc
0
Forward Current Characteristic
Circuit Simulation Result
Evaluation Circuit

4. All Rights Reserved Copyright (C) Bee Technologies Inc. 2004
Comparison Graph
Circuit Simulation Result
Simulation Result
Ifwd(A)
Vfwd(V)
Measurement
Vfwd(V)
Simulation
%Error
0.1 1.030 1.034 -0.340
0.2 1.080 1.078 0.204
0.5 1.150 1.144 0.539
1 1.200 1.205 -0.442
2 1.290 1.289 0.054
5 1.470 1.472 -0.143
10 1.730 1.728 0.098

5. All Rights Reserved Copyright (C) Bee Technologies Inc. 2004
V1
TD = 0
TF = 10ns
PW = 20us
PER = 50us
V1 = 0
TR = 10ns
V2 = 400
V2
0Vdc
D1 U1GC44
0
Junction Capacitance Characteristic
Circuit Simulation Result
Evaluation Circuit

6. All Rights Reserved Copyright (C) Bee Technologies Inc. 2004
Comparison Graph
Circuit Simulation Result
Simulation Result
Vrev(V)
Cj(pF)
Measurement
Cj(pF)
Simulation
%Error
0 24.058 24.058 0.000
0.1 22.361 21.524 3.743
0.2 21.065 21.777 -3.380
0.5 18.226 18.738 -2.809
1 15.671 15.913 -1.544
2 13.005 13.081 -0.584
5 9.802 9.738 0.649
10 7.725 7.679 0.599
20 5.982 6.031 -0.819
50 4.366 4.357 0.213
100 3.327 3.398 -2.158

7. All Rights Reserved Copyright (C) Bee Technologies Inc. 2004
V1
TD = 0
TF = 10ns
PW = 20us
PER = 50us
V1 = -9V
TR = 10ns
V2 = 11.1V
R1
50
D1 U1GC44
0
Reverse Recovery Characteristic
Circuit Simulation Result
Evaluation Circuit
Compare Measurement vs. Simulation
Measurement Simulation %Error
trr 3.08 us 3.06 us 0.649

8. All Rights Reserved Copyright (C) Bee Technologies Inc. 2004
Reverse Recovery Characteristic Reference
Trj =1.32(us)
Trb=1.76us)
Conditions: Ifwd=Irev=0.2(A), Rl=50
Example
Relation between trj and trb
Measurement