How do I convert XLSX to PDF for free?

How do I convert XLSX to PDF for free?

How to convert PDF to XLSX

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What are the parts of a switching power supply?

Switching Power Supply Schematic (20W/12V) The main circuit of the switching power supply is composed of an input electromagnetic interference filter (EMI), a rectification and filtering circuit, a power conversion circuit, a PWM controller circuit, and an output rectification and filtering circuit.

What is the efficiency of a switching power supply?

It characterizes 20kHz pulse frequency or pulse width modulation. The efficiency of the PWM switching power supply can reach 65%~70%, while the efficiency of the linear power supply is only 30%~40%. In the era of the global energy crisis, it has aroused widespread concern.

Why are switched mode power supplies more complex?

Introduction to Switched Mode Power Supplies. SMPS circuits are considerably more complex than the linear stabilised power supplies described in Power Supplies Module 2. The main advantage of this added complexity is that switched mode operation gives stabilised designs that can deliver more power for a given size, cost and weight of power unit.

How much does a variable DC power supply cost?

A variable DC power supply, seen in every electronics lab, on the market today costs around $300. These lab power supplies are very good for testing a circuit in the lab but not useful to be used in a product application. These power supplies can be very bulky and not very mobile.