This document summarizes the specifications and SPICE model for a general purpose rectifier diode with part number U1GC44 made by Toshiba. It includes the component name, manufacturer, and SPICE model parameters. It also provides simulation results that compare the diode's forward current, junction capacitance, and reverse recovery characteristics to measurement data. The simulations match the measurements to within 3.7% error or less.

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

2. SPICE MODEL
*$
* 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
*$
PSpice model
Model description
parameter
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
All Rights Reserved Copyright (C) Bee Technologies Inc. 2004

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

4. Comparison Graph
Circuit Simulation Result
Simulation Result
Vfwd(V) Vfwd(V)
Ifwd(A) %Error
Measurement Simulation
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
All Rights Reserved Copyright (C) Bee Technologies Inc. 2004

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

6. Comparison Graph
Circuit Simulation Result
Simulation Result
Cj(pF) Cj(pF)
Vrev(V) %Error
Measurement Simulation
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
All Rights Reserved Copyright (C) Bee Technologies Inc. 2004

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

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