A pulse-width modulator in a switching power...

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Question 1 of 20t66H6YdSEQcSwlRpzVeo

A pulse-width modulator in a switching power supply is used to:

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Question 1 of 20

t66H6YdSEQcSwlRpzVeo

A pulse-width modulator in a switching power supply is used to:

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🔍 Key Concepts

• Pulse-width modulation (PWM) and how it controls average power or voltage to a load • Difference between frequency of switching and duty cycle of the switch • Roles of other blocks in a switching regulator: reference source and error amplifier/comparator

💭 Think About

• When a switch is turning fully on and fully off, what aspect of its operation actually changes the average output voltage seen by the load? • If the switching frequency stayed the same but the ratio of ON time to OFF time changed, what would happen to the output voltage? • Which circuit block in a regulator normally provides a stable reference and which block compares output to that reference?

✅ Before You Answer

• Be clear on the definition of duty cycle (ON time / total period) and how it affects average output voltage. • Separate in your mind: which function belongs to a PWM circuit and which belong to a reference and error amplifier. • Ask: does PWM usually vary frequency or pulse width (duty cycle) to regulate output in standard switch-mode power supplies?

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Question 1 of 20t66H6YdSEQcSwlRpzVeo

A pulse-width modulator in a switching power supply is used to:

Back

Question 1 of 20

t66H6YdSEQcSwlRpzVeo

A pulse-width modulator in a switching power supply is used to:

No comments yet

Be the first to share your thoughts!

If the question has a related picture, it will appear here.

🔍 Key Concepts

💭 Think About

✅ Before You Answer

👋 Hi! I'm Genie, your AI study assistant. How can I help you with this question?

Quick actions

— No credit card needed