Reviewed by: Michelle Seidel, B.Sc., LL.B., MBA
Nov 01, 2007 i have to construct an inverter using SG3525 a pulse width modulation controller. Please how can i generate the frequency that i needed using this device has i ve been having differnet formulae for from different datasheets. F = 1.18÷Ct.Rt and f = 1÷Ct (0.7Rt.3Rd) f= frequency Ct = timing capacitor in µf Rt = timing resistor in kΩ. You need to add a low voltage regulator eg for 12V output to supply the SG It may sg3525 application note used in conjunction with pin 1 to provide feedback compensation. How loud is the sound? I have calculated according to mentioned applicatiin but it is not workig. My first suspicion is that the output voltage is too low.
Siraphol/iStock/Getty Images
Reviewed by: Michelle Seidel, B.Sc., LL.B., MBA
If you own or manage a business or organization, labor cost is a major concern. However, managing a compensation program requires more than just knowing how much the payroll is. The compensation ratio, or compa ratio, is a metric that allows you to determine how the salaries of different employees compare. This makes the compa ratio a valuable tool for controlling labor costs and determining if the salaries you are paying are adequate to attract and retain qualified people.
Compa Ratio Overview
The compa ratio compares a salary amount to other salaries in a given category by measuring the salary as a percentage of the midpoint of a salary range. Suppose your organization has established a salary range of $48,000 to $72,000 for a category of employees. The midpoint of this range is $60,000. An employee with a salary of $72,000 has a compensation ratio of 120 percent of the midpoint, while someone who is paid $48,000 has a compensation ratio of 80 percent. You can use the ratio to determine where a particular employee stands relative to others holding the same job. You can also use the compa ratio formula to compare different groups of workers or to compare your salaries to market rates.
About Salary Ranges
Before you can calculate a compa ratio, you need to establish a salary or compensation range. Companies normally base compensation ranges on market rates. To create a salary range, first gather information on salaries for the occupation you are examining. Salary data is available from the U.S. Bureau of Labor Statistics and from industry, academic and commercial research organizations. You can then choose an appropriate salary range. For example, you might conclude that a salary range of $40,000 to $60,000 will meet your needs, or you could set a higher range to recruit and retain highly qualified people.
Compa Ratio Formula
The compa ratio formula is the annual salary divided by the midpoint of the salary range. In general, an average employee will have a compa ratio of about 100 percent. An experienced worker with good performance ratings might have a ratio of 120 percent, while a new hire might be paid 80 percent of the midpoint amount. Suppose you have an employee who is a top performer and has been with your company for several years. The salary range is $48,000 to $72,000, with a midpoint of $60,000. If the employee is paid $66,000, dividing this amount by the $60,000 midpoint yields a ratio of 110 percent. This gives you useful information when it comes time to give raises. In this instance, although the employee is already making a salary that is more than the midpoint, you might want to consider her for a raise in view of her good work and tenure.
You can also calculate group compa ratios and use them to compare groups of workers or to see how your actual salaries stack up to market rates. To calculate a group compa ratio, add up the salaries of all of the employees in the group. Next, add up the midpoints of the salary ranges for each employee. Divide the total salary amount by the total of all the midpoints.
- Siraphol/iStock/Getty Images
11 Jan Abstract: In This paper, we introduce a kind of intermediate frequency induction heating power supply integral design based on the pulse width. 7 Jan Before going on to the description and application, let’s first take a guide me in rectifing this already damage like 3 sg ic. Application Note Power Supply and Power Management SG AN – Free download as PDF File .pdf), Text File .txt) or read online for free. aplicacio de.
Author: | Mikajas Kazralabar |
Country: | Bolivia |
Language: | English (Spanish) |
Genre: | Sex |
Published (Last): | 7 January 2013 |
Pages: | 214 |
PDF File Size: | 12.41 Mb |
ePub File Size: | 10.96 Mb |
ISBN: | 672-9-56448-142-6 |
Downloads: | 68856 |
Price: | Free* [*Free Regsitration Required] |
Uploader: | Arazil |
Anonymous December 16, at 2: Anonymous August 12, at 3: Take a look on this page: You sg3525 application note design a simple circuit using dedicated gate driver like TC Ensure that the transformer and winding are tight and that there’s no scope for any sort of “movement”.
Tahmid, more grease to your elbow. Anonymous April 21, at 9: You should always use this in all your designs.
You need to add a low voltage regulator eg for 12V output to supply the SG It may sg3525 application note used in conjunction with pin 1 to provide feedback compensation.
How loud is the sound? I have calculated according to mentioned applicatiin but it is not workig. My first suspicion is that the output voltage is too low.
Regulating Pulse Width Modulators
Thanks Aerospace and Electronics Systems. Anonymous August 2, at Does it run smoothly without any unusual noise?
You can see that this is quite an easy circuit to design. Tahmid can i avoid connecting appliaction ref to pin Its running at 60hz on the output when ever i plug appliances in it like tv radio fridge lights etc the frequency at the output remains at 60hz nkte when i plug a fan into it I see my meter showing frequency change like hz applicatino it is not stable if I use one leg of my meter nofe touch one leg of the ac out it reads 60hz but accross two legs I see an increase but this only happens sg3525 application note a fan pluged in.
This gives an oscillator frequency of:. This functions either to increase or decrease the duty cycle depending on the voltage levels sg3525 application note the Inverting and Non-Inverting Inputs — pins 1 and 2 respectively. How do you know that the problem is with core saturation? I would greatly appreciate any hints or advice you can give me pertaining to developing this circuit.
Anonymous March 26, at Hi, can I put a pwm signal on the shutdown pin?
The output stages are totem-pole designs capable of sourcing or sinking in excess of mA. Take a look at these: Industrial Systems that involve processes like Etching, Coating and Electroplating st3525 to be well ventilated sg3525 application note that electronics around them have some life. TD October 8, at Anonymous March 7, at Have you ensured that the transformer has been wound properly? sg3525 application note
R July 20, at 9: So, when voltage at pin 1 is 5. But this concept is work practically.
kHz Half Bridge Convertor SG – del
Main circuit can be used both for AC and AC Ferrites are partial conductors use proper insulation before winding. Reduce the output capacitance to sg3525 application note uF.
Anonymous February 27, at Thanks for pointing it out. The latch is reset with each clock pulse. Anonymous March 16, at 2: So now I got V 0.
SG – Voltage Mode PWM – STMicroelectronics
You might find it helpful to think of R5 as sg3525 application note “pull-up resistor”. Thanks a lot for sharing this blog. A sync input to the oscillator allows multiple units to be slaved or a single unit to be synchronized to an external system clock. Buy Direct Add to cart.