This document summarizes the modeling of a Vishay UF5404 general purpose rectifier diode. It includes the diode components and manufacturer. Simulation results show forward voltage, junction capacitance, and reverse recovery characteristics match measured data closely with less than 2% error. Key recovery times trj, trb, and trr are reported to evaluate the diode switching performance.

1. Device Modeling Report
COMPONENTS:
DIODE/GENERAL PURPOSE RECTIFIER/ STANDARD
PART NUMBER: UF5404
MANUFACTURER: VISHAY
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
All Rights Reserved Copyright (C) Bee Technologies Inc. 2004

3. Forward Current Characteristic
Circuit simulation result
Evaluation circuit
R1
0.01m
V1
0Vdc D1
DUF5404
0
All Rights Reserved Copyright (C) Bee Technologies Inc. 2004

4. Comparison graph
Circuit simulation result
Simulation Result
VF(V)
IF(A) Error (%)
Measurement Simulation
0.01 0.550 0.545 0.91
0.02 0.584 0.583 0.17
0.05 0.632 0.631 0.16
0.1 0.670 0.669 0.15
0.2 0.710 0.708 0.28
0.5 0.764 0.763 0.13
1 0.806 0.804 0.25
2 0.843 0.842 0.12
All Rights Reserved Copyright (C) Bee Technologies Inc. 2004

5. Junction Capacitance Characteristic
Circuit simulation result
Simulation Result
V2
0V
V1 = 0 V1
TD = 0 D1
V2 = 100
TR = 10n
TF = 50n DUF5404
PW = 5u
PER = 10u
0
All Rights Reserved Copyright (C) Bee Technologies Inc. 2004

6. Comparison graph
Circuit simulation result
Simulation Result
Cj(pF)
Vrev(V) Error (%)
Measurement Simulation
0.1 93.649 94.118 -0.50
0.2 87.910 87.843 0.08
0.5 74.830 74.902 -0.10
1 62.942 61.961 1.56
2 50.297 49.800 0.99
5 35.682 35.686 -0.01
10 26.867 26.863 0.01
20 20.104 20.200 -0.48
50 13.694 13.661 0.24
All Rights Reserved Copyright (C) Bee Technologies Inc. 2004

7. Reverse Recovery Characteristic
Circuit simulation result
Simulation Result
R1
50
V1 = -9.25 V1
V2 = 10.70 D1
TD = 0
TR = 10n DUF5404
TF = 10n
PW = 20u
PER = 50u
0
Compare Measurement VS. Simulation
Measurement Simulation %Error
trr 120 ns 119 ns 0.83
All Rights Reserved Copyright (C) Bee Technologies Inc. 2004

8. Reverse Recovery Characteristic Reference
Measurement
trj=36(ns)
trb=84(ns)
Conditions:Ifwd=Irev=0.2(A),Rl=50
Example
Relation between trj and trb
All Rights Reserved Copyright (C) Bee Technologies Inc. 2004