SPICE MODEL of PC825 in SPICE PARK. English Version is http://www.spicepark.net. Japanese Version is http://www.spicepark.com by Bee Technologies.

1. Device Modeling Report
COMPONENTS: PHOTOCOUPLER
PART NUMBER: PC825
MANUFACTURER: SHARP
Bee Technologies Inc.
All Rights Reserved Copyright (c) Bee Technologies Inc. 2006

2. DIODE MODEL
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
BIPOLAR JUNCTION TRANSISTOR MODEL
Pspice model
Model description
parameter
NR Reverse Emission Coefficient
RB Base Resistance
RC Series Collector Resistance
CJE Zero-bias Emitter-Base Junction Capacitance
CJC Zero-bias Collector-Base Junction Capacitance
TF Forward Transit Time
TR Reverse Transit Time
VOLTAGE CONTROLLED VOLTAGE SOURCE MODEL(VCVS)
E<Name><(+)Node><(－)Node>VALUE={Expression}
E<Name><(+)Node><(－)Node>TABLE={Expression}
All Rights Reserved Copyright (c) Bee Technologies Inc. 2006

3. VOLTAGE CONTROLLED CURRENT SOURCE MODEL(VCCS)
E<Name><(+)Node><(－)Node>VALUE={Expression}
CURRENT CONTROLLED MODEL(W)
Pspice model
Model description
parameter
IOFF Controlling current to Off state
ION Controlling current to On state
ROFF Off Resistance
RON On Resistance
All Rights Reserved Copyright (c) Bee Technologies Inc. 2006

4. Input Device Forward Current Characteristics
Measurement
Simulation
Input Device Junction Capacitance Characteristics
Measurement
Simulation
All Rights Reserved Copyright (c) Bee Technologies Inc. 2006

5. Input Device Reverse Recovery Characteristics
Measurement
trj=120n(s)
trb=152n(s)
Conditions:Ifwd=Irev=0.04(A),Rl=50
Example
Relation between trj and trb
All Rights Reserved Copyright (c) Bee Technologies Inc. 2006

6. LED IV Curve Characteristics
Evaluation Circuit
U2
1 8
open
V1
50mAdc I1 2 7 2Vdc
R1
3 6
open open 1k
4 5 0
open open
PC825
0
0
Simulation result
500mA
Simulation
100mA
10mA
1.0mA
0V 1.0V 2.0V 3.0V 3.5V
I(I1)
V(U2:1)
All Rights Reserved Copyright (c) Bee Technologies Inc. 2006

7. Comparison Table
Vfwd(V)
Ifwd(A) % Error
Measurement Simulation
0.001 1.080 1.077 -0.306
0.002 1.100 1.102 0.145
0.005 1.130 1.145 1.319
0.01 1.200 1.184 -1.367
0.02 1.240 1.246 0.516
0.05 1.400 1.398 -0.114
All Rights Reserved Copyright (c) Bee Technologies Inc. 2006

8. Transistor Saturation Characteristics
Evaluation Circuit
U3
1 8
I1 open
I2
20mAdc 2 7
5mAdc
3 6 R1
open open
1k
4 5
open open 0
0 0
PC825
Simulation result
1.6V
1.2V
Simulation
0.8V
0.4V
0s 50ms 100ms
V(I2:-)
Time
Comparison Table
Measurement Simulation % Error
Vce(sat) (V) 0.800 0.802 0.250
All Rights Reserved Copyright (c) Bee Technologies Inc. 2006

9. CTR(Current Transfer Ratio) Characteristics
Evaluation Circuit
V2 V3
0Vdc 0Vdc
U1
1 8
open
V1
I1 2 7 2Vdc
R1
20mAdc 3 6
open open 1k
4 5 0
open open
PC825 0
0
Simulation result
2.0K
Simulation
1.5K
1.0K
0.5K
100uA 1.0mA 10mA
(IC(X_U1.Q_Q1)/ I(X_U1.D_D1))*100
I_I1
All Rights Reserved Copyright (c) Bee Technologies Inc. 2006

10. Rise Curve Table
CTR(%)
If(mA) % Error
Measurement Simulation
0.200 520.000 532.684 2.439
0.500 930.000 900.767 -3.143
1.000 1570.000 1500.700 -4.414
1.100 1600.000 1609.900 0.619
Fall Curve Table
CTR(%)
If(mA) % Error
Measurement Simulation
1.100 1600.000 1609.900 0.619
2.000 1310.000 1261.800 -3.679
3.000 1100.000 1120.400 1.855
5.000 900.000 920.052 2.228
All Rights Reserved Copyright (c) Bee Technologies Inc. 2006

11. Switching Time Characteristics
Evaluation Circuit
V1
0Vdc
I1 = 0
I2 = 20m RL
TD = 0 U1 open
TF = 10n 1 8 100
TR = 10n I2
PW = 20u
PER = 500u V2 R1
2 7
2Vdc 1k
3 6
open open
0
4 5
open open
PC825 0
0
Simulation result
3.0V 20mA
1 2
Simulation
2.0V
10mA
1.0V
>>
0V 0A
0s 50us 100us 150us 200us
1 V(U1:8) 2 I(V1)
Time
Comparison Table
Vce=2V,RL=100 Measurement Simulation % Error
ts (us) 3.600 3.7583 4.397
tf (us) 52.000 49.801 -4.229
All Rights Reserved Copyright (c) Bee Technologies Inc. 2006