Zener Diode, Power Transister on Heat Sink Calculator

Instrumentation and Electrical Design

This calculator will determine the variouos design parameters of a Zener Diode, Power Transister on Heat SInk power regulator.

Zener Diode Heat Sink

Zener Diode + Power Transistor on Heatsink, Voltage Regulation  
                 
Zener ZD1 Volts          
ZD1 Voltage Tolerance %          
Resistor R1 Ohms          
Supply Voltage Volts          
Required O/P Current A          
TR1 Vbe @ Ic<0.1 A Volts          
TR1 Vbe @ Ic>0.1 A Volts          
  TR1 hfe            
Ambient Temperature ??C          
TR1 Therm Resistance ??C/W          
Heatsink Therm Res ??C/W          
    n nm            
ZD1 Max Voltage Volts ZD1 Min Voltage Volts  
  TR1 Vbe Volts   TR1 Vbe Volts  
Current in R1 = (Supply Voltage - Zener Voltage) / R  
  R1 A   R1 A  
  R1 Voltage Volts   R1 Voltage Volts  
TR1 base current (Ib) A TR1 base current (Ib) A  
  ZD1 current A   ZD1 current A  
Output Voltage TR1 Ve Volts Output Voltage TR1 Ve Volts  
  R1 Watts   R1 Watts  
  ZD1 Watts   ZD1 Watts  
  TR1 Ptot Watts   TR1 Ptot Watts  
TR1 Junction Temp ??C TR1 Junction Temp ??C  
                 

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