It should be based on a simple Open-loop configuration using the following components (no ICs)
a) any NPN transistor
b) Several zener diodes
c) Any passive components
d) A heat sink for the power transistor
Specifications:
Nominal output voltage = 12V @350mA load current
Maximum load current capability = 700mA
Variation allowed at the output = +/-200mA
Input voltage range = 16 to 20V
Maximum temperature =65deg Celcius
Use of E12 range of Resistors with +/-10%
Calculate approximate range of output voltage, under worst conditions with temperature range of 20 deg C to 50deg C, and output impedance.
What happens if we use another Zener diode to get the effects of input voltage variations buffered from another diode?
How do we select the value of the second zener diode?
How do we select the transistor?
How do we deal with the temperature specification?
THANK YOU....
a) any NPN transistor
b) Several zener diodes
c) Any passive components
d) A heat sink for the power transistor
Specifications:
Nominal output voltage = 12V @350mA load current
Maximum load current capability = 700mA
Variation allowed at the output = +/-200mA
Input voltage range = 16 to 20V
Maximum temperature =65deg Celcius
Use of E12 range of Resistors with +/-10%
Calculate approximate range of output voltage, under worst conditions with temperature range of 20 deg C to 50deg C, and output impedance.
What happens if we use another Zener diode to get the effects of input voltage variations buffered from another diode?
How do we select the value of the second zener diode?
How do we select the transistor?
How do we deal with the temperature specification?
THANK YOU....