This document summarizes the modeling of a D5LC20U diode component. It includes: 1) Details on the diode parameters used in the PSpice model. 2) Simulation results showing the forward current, junction capacitance, and reverse recovery characteristics match measurements within acceptable error margins. 3) Circuit diagrams of the evaluation setups used to measure the forward, capacitance, and reverse recovery characteristics.

1. Device Modeling Report
COMPONENTS:
DIODE/GENERAL PURPOSE RECTIFIER/ PROFESSIONAL
PART NUMBER: D5LC20U
MANUFACTURER: SHINDENGEN
REMARK: TC=25C
Bee Technologies Inc.
All Rights Reserved Copyright (C) Bee Technologies Inc. 2004

2. 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
10m
V1
0Vdc U4
D50LC20U
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
0.01 0.533 0.534 -0.19
0.02 0.558 0.558 0.00
0.05 0.596 0.596 0.00
0.1 0.629 0.629 0.00
0.2 0.667 0.667 0.00
0.5 0.729 0.729 0.00
1 0.784 0.777 0.89
2 0.850 0.850 0.00
All Rights Reserved Copyright (C) Bee Technologies Inc. 2004

5. Junction Capacitance Characteristic
Circuit Simulation Result
Evaluation circuit
V2
0Vdc
V1 = 0 V1
V2 = 100 U2
TD = 0
TR = 10ns D50LC20U
TF = 50ns
PW = 5us
PER = 10us
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
0 171.100 171.100 0.00
0.1 161.080 164.148 -1.90
0.2 151.940 151.313 0.41
0.5 132.450 132.190 0.20
1 113.360 113.945 -0.52
2 91.239 90.893 0.38
5 67.456 66.025 2.12
10 49.853 49.157 1.40
20 37.106 37.358 -0.68
50 24.760 25.165 -1.64
100 18.178 18.569 -2.15
All Rights Reserved Copyright (C) Bee Technologies Inc. 2004

7. Reverse Recovery Characteristic
Circuit Simulation Result
Evaluation circuit
R1
50
V1 = -9.1v V1
V2 = 10.9v U3
TD = 0
TR = 10ns D50LC20U
TF = 10ns
PW = 20us
PER = 50us
0
Compare Measurement vs. Simulation
Measurement Simulation Error (%)
trj 8.80 ns 8.81 ns 0.159
trb 16.40 ns 16.49 ns 0.597
All Rights Reserved Copyright (C) Bee Technologies Inc. 2004

8. Reverse Recovery Characteristic Reference
Measurement
trj=8.8(ns)
trb=16.4(ns)
Conditions:Ifwd=Irev=0.2(A),Rl=50
Example
Relation between trj and trb
All Rights Reserved Copyright (C) Bee Technologies Inc. 2004