uPC7893A LTspice Model (Free SPICE Model)

1. All Rights Reserved Copyright (c) Bee Technologies Inc. 2004
Device Modeling Report
Bee Technologies Inc.
COMPONENTS : VOLTAGE REGULATOR
PART NUMBER : uPC7893A
MANUFACTURER : NEC Electronics Corporation

2. All Rights Reserved Copyright (c) Bee Technologies Inc. 2004
GND
OUTIN
U1
UPC7893A
1
2
3
SPICE MODEL
`
*$
*PART NUMBER: uPC7893A
*MANUFACTURER: NEC Electronics Corporation
*ALL Rights Reserved Copyright (c) Bee Technologies Inc. 2004
.SUBCKT uPC7893A IN GND OUT
JADJ IN ADJ ADJ JADJMOD
VREF 4 ADJ 1.250
DBK IN 13 DMOD
CBC 13 15 800.0E-12
RBC 15 5 1.000E3
QPASS 13 5 OUT QPASSMOD
RB1 7 6 1
RB2 6 5 126.3
DSC 6 11 DMOD
ESC 11 OUT VALUE={5.646-25.18E-3*V(6,5)*V(13,5)}
DFB 6 12 DMOD
EFB 12 OUT VALUE={3.413+.3489*V(13,5)-16.01E-3*V(13,5)*V(13,5)
+ -1.00E-3*V(13,5)*V(6,5)}
EB 7 OUT 8 OUT 6.969
RP 9 8 100
CPZ 10 OUT 1.592E-6
DPU 10 OUT DMOD
RZ 8 10 .1
EP 9 OUT 4 OUT 100
RI OUT 4 100MEG
RADJ ADJ GND 1536
ROUT OUT ADJ 240
CADJ ADJ GND 0.1u
.MODEL QPASSMOD NPN (IS=30F BF=50 VAF=39.72 NF=1.738)
.MODEL JADJMOD NJF (BETA=50.00E-6 VTO=-1)
.MODEL DMOD D (IS=30F N=1.738)
.ENDS
*$

3. All Rights Reserved Copyright (c) Bee Technologies Inc. 2004
MODEL PARAMETER
Pspice
model
parameter
Model description
VREF Reference Voltage
N Emission Coefficient
BETA Tranconductance of JFET Transistor
VAF Early Voltage of Output Pass Transistor
CPZ Output Impedance Zero Capacitor
RB2 Base Resistance of Output Limit Voltage Source
ESC1 Coefficient of Current Limit Voltage Source
ESC2 Coefficient of Current Limit Voltage Source
EFB1 Coefficient of Foldback Current Voltage Source
EFB2 Coefficient of Foldback Current Voltage Source
EFB3 Coefficient of Foldback Current Voltage Source
EB Non-ideal Base-Collector Diode Saturation Current

4. All Rights Reserved Copyright (c) Bee Technologies Inc. 2004
Input-Output Voltage Differential Characteristic
Evaluation Circuit
Simulation result
Example
Measurement Simulation % ErrorVIN - VOUT
15 (V) – 9.3 (V) 5.7 (V) 5.7004 (V) 0.007
GND
OUTIN
U1
UPC7893A
1
2
3
V1
15 Cout
0.1u
RL
18.6
0
Input - Output
Input

5. All Rights Reserved Copyright (c) Bee Technologies Inc. 2004
Ripple Rejection (R•R) Characteristic
Evaluation Circuit
Simulation result
Comparison Table
Measurement Simulation % Error
Ripple rejection ratio
(dB)
70 70.034 0.049
Output
Input
RL
18.6
V2
16
Vin Vout
D3
S1VBA
D1
S1VBA C1
0.1u
Cout
0.1u
D4
S1VBA
GND
OUTIN
U1
UPC7893A
1
2
3
D2
S1VBA
0
V1
FREQ = 120
VAMPL = 1
VOFF = 0

6. All Rights Reserved Copyright (c) Bee Technologies Inc. 2004
Output Characteristic
Evaluation Circuit
Simulation result
Comparison Table
Measurement Simulation % ErrorOutput Voltage
(V) 9.3 9.2587 -0.444
V3
TD = 0
TF = 50n
PW = 50m
PER = 600m
V1 = 0
TR = 50n
V2 = 100
D4
S1VBA
0
D3
S1VBA
V(2,0)+V(3,0)
ABM
V1
FREQ = 50
VAMPL = 24.5
VOFF = 0
R5
10MEG
C1
10000u
GND
OUTIN
U1
UPC7893A
1
2
3
D2
S1VBA
RL
18.6
D1
S1VBA
E1
V(1,0)*(V(%IN+, %IN-)-1)
EVALUE
OUT+
OUT-
IN+
IN-
0
R4
10MEG
C4
0.1u
2 3
V2
TD = 50m
TF = 50n
PW = 50n
PER = 600m
V1 = 10
TR = 500m
V2 = 0.05
1
R3
10MEG
Simulation