Moteur de recherche de fiches techniques de composants électroniques |
|
TEA1833LTS Fiches technique(PDF) 10 Page - NXP Semiconductors |
|
TEA1833LTS Fiches technique(HTML) 10 Page - NXP Semiconductors |
10 / 24 page TEA1833LTS All information provided in this document is subject to legal disclaimers. © NXP Semiconductors N.V. 2015. All rights reserved. Product data sheet Rev. 1 — 31 August 2015 10 of 24 NXP Semiconductors TEA1833LTS GreenChip SMPS control IC The output voltage can drop, for instance, because a load is too high or a short circuit event occurs. If the output voltage drops, the decrease of the transformer current during the secondary stroke time (tsec) becomes less. As a result, the next cycle starts at a higher peak current. Also, at the next cycle, the minimum on-time equals the blanking time. During this blanking time, the peak current can increase to above the targeted regulation level. If the transformer current does not decrease sufficiently during the secondary stroke, the peak current can continuously increase to such a level that the transformer saturates (see Figure 10). To avoid this continuous peak current increase, also called runaway, the IC features a special protection (see Figure 11). If the system detects that the peak current already exceeds the targeted level after 1 s, the next switching period time is extended from 7.7 s (f sw =130 kHz) to 28 s (fsw = 36 kHz). The time of the secondary stroke is then sufficient to decrease the transformer current to below the targeted peak current again. Fig 10. Peak current runaway Fig 11. OSCP peak current runaway |
Numéro de pièce similaire - TEA1833LTS |
|
Description similaire - TEA1833LTS |
|
|
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 |