전자부품 데이터시트 검색엔진 |
|
LM317-N-MIL 데이터시트(PDF) 13 Page - Texas Instruments |
|
|
LM317-N-MIL 데이터시트(HTML) 13 Page - Texas Instruments |
13 / 39 page ( ) OUT ADJ R V = 1.25 V I R R 2 2 1 1 æ ö + + ç ÷ è ø 13 LM317-N-MIL www.ti.com SNVSAY0 – JUNE 2017 Product Folder Links: LM317-N-MIL Submit Documentation Feedback Copyright © 2017, Texas Instruments Incorporated Device Functional Modes (continued) 7.4.2 Protection Diodes When external capacitors are used with any IC regulator, it is sometimes necessary to add protection diodes to prevent the capacitors from discharging through low current points into the regulator. Most 10-μF capacitors have low enough internal series resistance to deliver 20-A spikes when shorted. Although the surge is short, there is enough energy to damage parts of the IC. When an output capacitor is connected to a regulator and the input is shorted, the output capacitor will discharge into the output of the regulator. The discharge current depends on the value of the capacitor, the output voltage of the regulator, and the rate of decrease of VIN. In the LM317-N-MIL, this discharge path is through a large junction that is able to sustain 15-A surge with no problem. This is not true of other types of positive regulators. For output capacitors of 25 μF or less, there is no need to use diodes. The bypass capacitor on the adjustment terminal can discharge through a low current junction. Discharge occurs when either the input, or the output, is shorted. Internal to the LM317-N-MIL is a 50-Ω resistor which limits the peak discharge current. No protection is needed for output voltages of 25 V or less and 10-μF capacitance. Figure 17 shows an LM317-N-MIL with protection diodes included for use with outputs greater than 25 V and high values of output capacitance. D1 protects against C1 D2 protects against C2 Figure 17. Regulator With Protection Diodes |
유사한 부품 번호 - LM317-N-MIL |
|
유사한 설명 - LM317-N-MIL |
|
|
링크 URL |
개인정보취급방침 |
ALLDATASHEET.CO.KR |
ALLDATASHEET 가 귀하에 도움이 되셨나요? [ DONATE ] |
Alldatasheet는? | 광고문의 | 운영자에게 연락하기 | 개인정보취급방침 | 링크교환 | 제조사별 검색 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 |