| 摘要 |
A power supply with a protection circuit that protects against over current, short circuit, output overvoltage, and input undervoltage with a minimal number of components. A pulse width modulated power supply has a controller using two operational amplifiers, namely an error amplifier and an overvoltage comparator, which are used to limit the duty cycle of the power supply. When the output voltage differs significantly from a reference, the overvoltage comparator triggers causing the supply to enter hiccup mode wherein it shuts off and automatically restarts, checking to see if the condition which caused shutdown is still present.
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