Moteur de recherche de fiches techniques de composants électroniques |
|
LM3411AM5X-5.0 Fiches technique(PDF) 9 Page - National Semiconductor (TI) |
|
|
LM3411AM5X-5.0 Fiches technique(HTML) 9 Page - National Semiconductor (TI) |
9 / 13 page Applications Information (Continued) Improved output voltage tolerance and regulation specifica- tions are possible by combining the LM3411A with one of the SIMPLE SWITCHER buck regulator IC’s, such as the LM2574, LM2575, or LM2576. The circuit shown in Figure 5 can provide a 5V, ±0.5% Output (1% over the operating tem- perature range) without using any trim-pots or precision re- sistors. Typical line regulation numbers area1mV change on the output for a 8V–18V change on the input, and load regulation of 1 mV with a load change from 100 mA–1A. A DC-DC flyback converter that accepts a negative input voltage, and delivers either a positive or negative output is shown in Figure 6. The circuit utilizes a buck regulator (such as the LM2574, LM2575, or LM2576, depending on how much output current is needed) operating in a flyback con- figuration. The LM3411 provides the reference and the re- quired level shifting circuitry needed to make the circuit work correctly. A unique feature of this circuit is the ability to ground either the high or low side of the output, thus generating either a negative or a positive output voltage. Although no isolation is provided, with the addition of an opto-isolator and related components, this circuit could provide input/output isolation. Combining a LM3411A-5.0 with a 1A low dropout linear regu- lator results in a 5V ±0.5% (1% over the operating tempera- ture range) regulator with excellent regulation specifications, with no trimming or 1% resistors needed. An added benefit of this circuit (and also true of many of the other circuits shown here) is the high-side and low-side re- mote output voltage sensing feature. Sensing the output voltage at the load eliminates the voltage drops associated with wire resistance, thus providing near perfect load regula- tion. A 5V, 1A regulator circuit featuring low dropout, very good regulation specifications, self protection features and allows output voltage sensing is shown in Figure 7. The regulator used is a LM2941 adjustable low dropout positive regulator, which also features an ON/OFF pin to provide a shutdown feature. DS011987-17 FIGURE 5. Precision 1A Buck Regulator DS011987-18 FIGURE 6. Negative Input, Negative or Positive Output Flyback Regulator www.national.com 9 |
Numéro de pièce similaire - LM3411AM5X-5.0 |
|
Description similaire - LM3411AM5X-5.0 |
|
|
Lien URL |
Politique de confidentialité |
ALLDATASHEET.FR |
ALLDATASHEET vous a-t-il été utile ? [ DONATE ] |
À propos de Alldatasheet | Publicité | Contactez-nous | Politique de confidentialité | Echange de liens | Fabricants All Rights Reserved©Alldatasheet.com |
Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |