At the end of this module, you should be able to:
Going through this module can be both a fun and a meaningful learning experience. All you need to do is make use of your time and resources efficiently. To do this, here are some
tips for you:
1. Take time in reading and understanding each lesson. It is better to be slow but sure than to hurry finishing the module only to find out that you missed the concepts you are supposed to learn.
2. Do not jump from one chapter to another. Usually, the lessons are arranged such that one is built upon another, hence an understanding of the first is essential in comprehending the succeeding lessons.
3. Be honest. When answering the test items, do not turn to the key to correction page unless you are done. Likewise, when performing experiments, record only what you have really observed.
4. Safety first. Perform the experiments with extra precaution. Wear safety gears whenever necessary.
5. Don’t hesitate to ask. If you need to clarify something, approach your teacher or any knowledgeable person.
• Zener diodes are designed to operate at voltages greater than the breakdown voltage (peak reverse voltage).
• The breakdown voltage of a zener diode is determined by the resistivity of the diode.
• Zener diodes are manufactured with a specific breakdown (zener) voltage.
• Power dissipation of a zener diode is based on temperature and lead lengths.
• Zener diodes are packaged the same as PN junction diodes.
• Zener diodes with a breakdown voltage greater than 5 V have a positive zener voltage-temperature coefficient.
• Zener diodes with a breakdown voltage less than 4 V have a negative zener voltage-temperature coefficient.
• Zener diodes are used to stabilize or regulate voltage.
• Zener diode regulators provide a constant output voltage despite changes in the input voltage or output current.
• Zener diodes can be tested for opens, shorts, or leakage with an ohmmeter.
• To determine whether a zener diode is regulating at the proper voltage, a regulation test must be performed.
