The resulting dc voltage usually has some ripple or ac voltage variation. A regulating circuit use this dc input to provide a dc voltage that not only has much less ripple voltage but also remains constant even if the input dc voltage varies somewhat or the load connected to the output dc voltage changes.
The regulated dc supply is available across a voltage divider. Often more than one dc voltage is required for the operation of electronic circuits. A single power supply can provide as many as voltages as are required by using a voltage or potential divider, as illustrated in the figure.
As illustrated in the figure, a potential divider is a single tapped resistor connected across the output terminals of the supply. The tapped resistor may consist of two or three resistors connected in series across the supply. In fact, a bleeder resistor may also be employed as a potential divider.
There are various factors that determine the quality of the power supply like the load voltage, load current, voltage regulation, source regulation, output impedance, ripple rejection, and so on.
Some of the characteristics are briefly explained below:. Load Regulation — The load regulation or load effect is the change in regulated output voltage when the load current changes from minimum to maximum value.
From the above equation we can understand that when Vno-load occurs the load resistance is infinite, that is, the out terminals are open circuited.
Vfull-load occurs when the load resistance is of the minimum value where voltage regulation is lost. Minimum Load Resistance — The load resistance at which a power supply delivers its full-load rated current at rated voltage is referred to as minimum load resistance. The value of Ifull-load, full load current should never increase than that mentioned in the datasheet of the power supply.
Since this ac supply mains voltage is the input to the ordinary power supply, the filtered output of the bridge rectifier is almost directly proportional to the ac mains voltage. The source regulation is defined as the change in regulated output voltage for a specified rage of lie voltage.
Output Impedance — A regulated power supply is a very stiff dc voltage source. This means that the output resistance is very small. Even though the external load resistance is varied, almost no change is seen in the load voltage. An ideal voltage source has an output impedance of zero. Ripple Rejection — Voltage regulators stabilize the output voltage against variations in input voltage.
Ripple is equivalent to a periodic variation in the input voltage. It depends on your needs. Unregulated power supplies are less expensive, but can only supply power as clean as the available input power.
If you are powering equipment with sensitive electronics, clean power is an absolute requirement. You can use an unregulated power supply if it is matched closely to the voltage and current requirements of the device, allowing it to still run smoothly. If you need a power supply that can offer multiple DC output voltages, then one regulated power supply with multiple outputs will be a better option than multiple supplies with single outputs.
Regulated power supplies are also more common and easily found as it is getting easier to make regulated power supplies that are still inexpensive. Also, if the device you are using is sensitive, you may want to choose a regulated power supply, giving you more confidence that your device is receiving the correct amount of voltage no matter the input. If you are unsure of what type of power supply you are using for your sensor, contact us today!
We will help you determine if you are using a regulated or unregulated power supply and what type of sensor will be the best choice for your needs. Army Corps of Engineers Detroit District via flickr cc. Unregulated Power Supply: The Differences. In other words, uncontrolled power supplies have a continuous volume of power and use the fantastic electrical jargon again. As the output voltage rises, and vice versa, the power output is decreased; thus, the uncontrolled supply of power is always to meet the current and voltage needs of the power supply.
A Regulated Power Supply that produces a constant DC power supply or voltage, which is independent of the current drawn from the temperature on top of any changes of the AC voltage line, is a regulated electronic power supply. The word here governed refers to a device that retains a permanent output voltage, regardless of changes in the input voltage or frequency and regardless of changes in the output load. Simply placed, unchecked AC tension becomes continuous DC tension.
A system or circuit which is to run under defined power supply limits is supplied with stable voltage. The governed power supply produces a steady voltage in fancy electrical terminology, regardless of the power output present. Multiple outlet voltages can be supplied by a regulated power supply with multiple regulator units.
Regulated energy supplies retain the optimal voltage level and, due to their smooth, consistent voltage delivery, are suitable for nearly all forms of electronic devices. It has a continuous power supply. The input and charging voltage providing a fixed output, and even a small difference in the input influences the voltage directly.
If you want to use devices which are sensitive to load variations, then you might want to use regulated power supply because it makes sure the output remains unchanged irrespective of any changes in the input. Therefore, regulated power supplies are used for all applications that require an exact amount of output voltage.
Difference Between Similar Terms and Objects. MLA 8 Khillar, Sagar. Name required. Email required. Please note: comment moderation is enabled and may delay your comment. There is no need to resubmit your comment. Notify me of followup comments via e-mail. Written by : Sagar Khillar. Solid-State Power Conversion Handbook. Print [1]Kishore, Lal K.
Operational Amplifiers and Linear Integrated Circuits. User assumes all risk of use, damage, or injury. You agree that we have no liability for any damages. What is a Regulated Power Supply?
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