SPICE MODEL of uPC78N24H in SPICE PARK
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This document summarizes the modeling parameters and performance of the uPC78N24H voltage regulator. It includes: 1) A list of model parameters for the regulator including reference voltage, emission coefficient, and capacitance values. 2) Simulation results showing the input-output voltage differential is within 0.2% of measurements. 3) Ripple rejection ratio simulation matching measurements within 5%. 4) Output voltage simulation matching measurements to within 0.05% under varying load and input conditions.
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SPICE MODEL of uPC78N24H in SPICE PARK
- 1. Device Modeling Report COMPONENTS : VOLTAGE REGULATOR PART NUMBER : uPC78N24H MANUFACTURER : NEC Electronics Corporation Panasonic Bee Technologies Inc. All Rights Reserved Copyright (c) Bee Technologies Inc. 2004
- 2. MODEL PARAMETER Pspice model Model description parameter 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 All Rights Reserved Copyright (c) Bee Technologies Inc. 2004
- 3. Input-Output Voltage Differential Characteristic Evaluation Circuit U1 1 3 IN OUT GND UPC78N24H 2 33 V1 RL Cout 120 0.1u 0 Simulation result Input - Output Input Example VIN - VOUT Measurement Simulation % Error 33 (V) – 24 (V) 9 (V) 8.9843 (V) -0.174 All Rights Reserved Copyright (c) Bee Technologies Inc. 2004
- 4. Ripple Rejection (RR) Characteristic Evaluation Circuit U1 Vin Vout 1 3 IN OUT GND UPC78N24H 2 D1 D2 S1VBA S1VBA C1 Cout RL 0.33u 0.1u 120 V1 D3 D4 VOFF = 0 VAMPL = 1 FREQ = 120 S1VBA S1VBA V2 33 0 Simulation result Output Input Comparison Table Measurement Simulation % Error Ripple rejection ratio (dB) 57 54.199 -4.914 All Rights Reserved Copyright (c) Bee Technologies Inc. 2004
- 5. Output Characteristic Evaluation Circuit U1 V(1,0)*(V(%IN+, %IN-)-1) E1 1 3 IN OUT OUT+ IN+ GND UPC78N24H OUT- IN- D1 D2 EVALUE ABM 2 V(2,0)+V(3,0) 1 S1VBA S1VBA C4 C1 R3 VOFF = 0 D3 D4 0.1u RL 10MEG V1 VAMPL = 38 20000U 120 S1VBA S1VBA FREQ = 50 0 2 3 V1 = 10 V2 V1 = 0 V3 V2 = 0.05 V2 = 100 R5 TD = 50m R4 TD = 0 TR = 500m TR = 50n 10MEG TF = 50n 10MEG TF = 50n PW = 50n PW = 50m PER = 600m PER = 600m 0 Simulation result Simulation Comparison Table Output Voltage Measurement Simulation % Error (V) 24 23.987 -0.054 All Rights Reserved Copyright (c) Bee Technologies Inc. 2004