Skip to main content
Device Modeling Report



COMPONENTS:
DIODE/ GENERAL PURPOSE RECTIFIER/ STANDARD
PART NUMBER: 1SS400
MANUFACTURER: ROHM




                   Bee Technologies Inc.

     All Rights Reserved Copyright (C) Bee Technologies Inc. 2008

                                -1-
SPICE MODEL

*$
* P ART NUMBER: 1SS400
* M ANUF ACTURER: ROHM
* VRM=80,IO=100m
* All Rights Reserved Copyright ( C) Bee Technologies Inc. 2008
.MODEL D1SS400 D
+ IS=6.5141E-9
+ N=1.9171
+ RS=1.0000E- 6
+ IKF=12.751E-3
+ CJO=541.55E-15
+ M=.10579
+ VJ=9.9900
+ ISR=0
+ BV=100
+ IBV=100.00E-12
+ TT=10.293E-9
*$




             All Rights Reserved Copyright (C) Bee Technologies Inc. 2008

                                        -2-
DIODE MODEL PARAMETERS

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. 2008

                                      -3-
Forward Current Characteristic

Circuit Simulation Result

             100mA




              10mA




             1.0mA




             100uA




              10uA
                     0V    0.1V     0.3V     0.5V          0.7V      0.9V   1.1V
                          I(R1)
                                                    V_V1
Evaluation Circuit

                                     R1

                                     0.01m



                             V1
                             0Vdc                          D1
                                                           D1SS400




                                       0




                 All Rights Reserved Copyright (C) Bee Technologies Inc. 2008

                                              -4-
Comparison Graph

Circuit Simulation Result




Simulation Result

                                      Vfwd (V)
            Ifwd (A)                                                      %Error
                            Measurement      Simulation
               0.00001              0.362            0.364                      -0.55
               0.00002              0.397            0.398                      -0.25
               0.00005              0.441            0.443                      -0.45
                0.0001              0.482            0.478                       0.83
                0.0002              0.515            0.513                       0.39
                0.0005              0.561            0.559                       0.36
                  0.001             0.597            0.594                       0.50
                  0.002             0.628            0.630                      -0.32
                  0.005             0.680            0.681                      -0.15
                   0.01             0.721            0.725                      -0.55
                   0.02             0.777            0.776                       0.13
                   0.05             0.861            0.857                       0.46
                    0.1             0.921            0.923                      -0.22




                 All Rights Reserved Copyright (C) Bee Technologies Inc. 2008

                                            -5-
Capacitance Characteristic

Circuit Simulation Result

                10p




               1.0p




               100f
                  2V              5V                          10V               15V
                       I(V2)/(80V/1u)
                                                  V(N11503)
Evaluation Circuit

                                             V2



                                             0Vdc



                       V1 = 0       V1
                       V2 = 80V                                     D1
                       TD = 0                                       D1SS400
                       TR = 1u
                       TF = 50ns
                       PW = 5us
                       PER = 10us




                                                  0




                 All Rights Reserved Copyright (C) Bee Technologies Inc. 2008

                                            -6-
Comparison Graph

Circuit Simulation Result




Simulation Result

                                      Cj (pF)
              Vrev (V)                                                 %Error
                            Measurement     Simulation
                       2           0.532           0.531                    -0.19
                       3           0.527           0.527                     0.00
                       4           0.522           0.523                     0.17
                       5           0.518           0.519                     0.19
                      10           0.503           0.503                     0.00
                      15           0.492           0.491                    -0.20




                 All Rights Reserved Copyright (C) Bee Technologies Inc. 2008

                                            -7-
Reverse Recovery Characteristic

Circuit Simulation Result

                  400mA


                  300mA


                  200mA


                  100mA


                   -0mA


                 -100mA


                 -200mA


                 -300mA


                 -400mA
                    19.98us    20.00us       20.02us            20.04us    20.06us 20.08us
                         I(R1)
                                                         Time
Evaluation Circuit

                                              R1


                                                    50

                           V1 = -9.1V
                           V2 = 11V
                           TD = 12ns    V1
                           TR = 10ns                                  D1
                           TF = 15ns                                  D1SS400
                           PER = 50us
                           PW = 20us




                                                    0




Compare Measurement vs. Simulation

                                 Measurement               Simulation             %Error
           trj            ns                 7.40                         7.70          4.04



                    All Rights Reserved Copyright (C) Bee Technologies Inc. 2008

                                               -8-
Reverse Recovery Characteristic                                        Reference

Measurement




Trj =7.40(ns)
Trb= 3.20 (ns)
Conditions: Ifwd=0.2A,Irev=0.2A, Rl=50




                                                          Example




                               Relation between trj and trb



                All Rights Reserved Copyright (C) Bee Technologies Inc. 2008

                                           -9-