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Power Supply Hiccup


Check your email for your verification email, or enter your email address in the form below to resend the email. {* #resendVerificationForm *} {* signInEmailAddress *} {* /resendVerificationForm *} Almost Done DON'T MISS ANOTHER ISSUE OF EDN IN YOUR INBOX! My focus is on modern switch-mode power products in the range of 1 to 3,000-watts. The current limiter protects the regulator from damage by holding the maximum output current at a constant level that doesn't damage the regulator. http://macland.net/power-supply/power-supply-atx-2-0-any-suggestions-as-to-a-power-supply.php

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Hiccup Mode Wiki

Check the ‘Overload’ parameters, which are shown in the ‘Protection’ section of the data sheet. The Meanwell page for this series says "2 outputs are isolated for RID series".Anyway I'm definitely ordering an "I" series for my bench PSU. Please type your message and try again. 7 Replies Latest reply on Sep 25, 2013 3:31 AM by jm1024 Basic Switching Power Supply Question jm1024 Sep 23, 2013 11:21 PM I've The majority of over-current-protections include an automatic recovery feature.

  1. This "isolation" refers to the existence of a...
  2. What does 1U, 2U or 3U mean?
  3. What does this mean?
  4. When using this type of power supply it is important to limit the "average power" that is delivered to load.
  5. The addition of a few components can provide a three-terminal regulator with high-speed short-circuit current limiting for improved reliability.
  6. Peak-Current Power Supplies It should be mentioned that some power supplies are designed specifically to provide large peak-currents, which can range from 200 to 300% of the maximum current rating for
  7. November 15, 2008 at 6:42 AM Power Guy said...

Many rack-mounted power systems are specified as being 1U, 2U, 3U, etc. January 1, 2011 at 10:50 AM Post a Comment Newer Post Older Post Home Subscribe to: Post Comments (Atom) Popular Posts Isolated & Non-Isolated DC-DC Converters There are two frequently used With such operation, the dissipation in the power supply itself is minimal. Your existing password has not been changed.

For example, assume that the circuit in Figure 1a works with a UCC3570 PWM controller. Thank you for your input Battery Boy. I'm a newbie to this stuff.Thanks for any help.- James 894Views Tags: none (add) Reply This content has been marked as final. http://power-topics.blogspot.com/2008/09/over-current-protection-in-power.html Search Sign In | Sign Up Edit Profile | Sign Out Login Sign In With {* loginWidget *} {* #signInForm *} {* signInEmailAddress *} {* currentPassword *} Forgot your password?

One drawback of fold-back current limiting is that if the supply turns on into a heavy capacitive load, it could latch-up at a reduced current before reaching its full output voltage. As always, do check the datasheet(s) for complete information. If no load is found, or the load is too low, it shuts down again and the cycle repeats until the proper load is established or power to the supply is It is installed very close to the IC. 1 of 1 people found this helpful Like Show 0 Likes(0) Reply Actions Go to original post I've got a Switching Power Supply


Close {* mergeAccounts {"custom": true} *} {| rendered_current_photo |} {| current_displayName |} {| current_emailAddress |} {| foundExistingAccountText |} {| current_emailAddress |}. {| moreInfoHoverText |} {| existing_displayName |} - {| existing_provider |} To solve the equation, you must first determine VC1(0). Hiccup Mode Wiki In Figure 1a, because 2.3τ1ON&5τ1, you can approximate VC1(0) by using VC1(0)=VIC1–VBEQ4–VCEQ2–VD1.After time period tSLEEP elapses, C1 should have discharged to a low enough voltage to turn off Q1, thereby allowing Foldback Current Limiting Circuit Diagram Over Current Protection in Power Supplies & Converters Most AC-DC power supplies and DC-DC converters have internal current-limiting circuits to protect the power device, and to some degree its l...

Depending upon the design, recovery from a fold-back current limit condition can be automatic, or after a built-in time delay when the overload condition is removed. navigate here Hiccup current limit performs the best of the three types; however, the implementation is rather complex. What is PFC and why do I need it? On some multiple output power supplies, no load on the primary output channel of a multi-channel power supply is considered a fault condition. Overcurrent Protection Circuit For Power Supplies

Please try the request again. SUBSCRIBE TO NEWSLETTERS TODAY! The response of these power supplies to a low load on the primary is to drop into something known as "hiccup mode." In "hiccup mode" the power supply shuts down, then Check This Out The response of these power supplies to a low load on the primary is to drop into something known as "hiccup mode." In "hiccup mode" the power supply shuts down, then

Should the overload condition be removed, the supply will again operate normally. Account Activated Your account has been reactivated. Fold-Back Current Limiting: When this method is employed if an overload condition exists, the output voltage and current reduce to safe levels.

We strongly recommend that you read the data sheets carefully when selecting a power supply.

If the overload is still present it will shut down again. His hobbies are restoring classic Corvettes and relentlessly spoiling his grandkids. There are a number of ways to implement over-current-protection (OCP), and below are descriptions of the most common methods. Hiccup Mode Power Supply Resolving Power Supply Hiccup Mode By Tony Green Jameco Technical Support What is hiccup mode?

Mean Well are constantly revising their data sheets, so be sure to download the latest versions from the Power Supplies Australia website before checking the overload characteristics. They require much less draw to work (300mA on 5v and 200mA on 12v). The discharge current of C2 causes Q3 and, hence, Q2 to turn on for a short interval to charge the timing capacitor, C1. http://macland.net/power-supply/power-flashes-when-i-flip-the-power-supply-switch.php To solve this problem, a dummy load can be placed on the primary so the power supply secondaries will work.

Show 7 replies Re: Basic Switching Power Supply Question Colin Barnard Sep 24, 2013 1:25 AM (in response to jm1024) Yes, you should just be able to connect it up and A member of our expert team will be happy to answer any questions you may have. either attach a 240/110V light bulb across them or a multimeter to drain\check their charge state.What is more likely to be causing a problem is one of the 'starter' cap for He was also an Electronics Technician at B.Braun AG, in West Germany.

Both the Mean Well HRP-75 and HRP-100 have this characteristic. A bit less amperage (3A on 12v and 6A on 5v) but it should work.Thanks again for all the help! - James Like Show 0 Likes(0) Reply Actions Re: Basic Your cache administrator is webmaster. With this action, the controller becomes temporary disabled, and the shutdown latch resets.After C2 completely discharges, Q3 and Q2 switch off, and the charge stored in C1 continuously supplies the base

More information about peak-current-rated supplies will be provided in a separate article. First, it depends on the PWM IC. Linear vs. For electronic equipment racks (e.g., 19 or 23 ...

In many cases, should an overload (e.g., short circuit) be allowed to exist for a prolonged period, it can reduce the product's field life by temperature stressing the electrolytic capacitors, and GLOBAL NETWORK EE Times Asia EE Times China EE Times Europe EE Times India EE Times Japan EE Times Korea EE Times Taiwan EDN Asia EDN China EDN Japan ESC Brazil The PWM controller then stays in sleep mode for the fixed interval, tSLEEP, until the discharge current of C1 can no longer keep Q1 on. In this scheme, upon detection of an overcurrent event, the whole power supply shuts down for an interval before it tries to power itself up again.

I use these at work as a bench power supply for the equipment I repair (RID-125-1224).Is this brand new or ex-equipment?Have you or anyone else fiddled with the trimpot at the