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16 September, 08:37

A voltage regulator is to provide a constant DC voltage Vl=10V to a load Rl from a nominal Vcc=15V supply voltage. The load can vary from 20Ω to 1KΩ. The supply voltage Vcc can vary from 13V to 16V. The op-amp can provide a maximum output current of 20mA. a) Find the βnecessary for the transistor to provide the needed current. b) Find the maximum power the transistor must dissipate.

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  1. 16 September, 09:13
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    Beta values can be from the equation=change in Vcc/nominal Vcc

    Beta=16-3/15=3/15=1/5=0.20

    Maximum power=I^2*R=40 W
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