Electronic component search and free download site.
Transistors,MosFET ,Diode,Integrated circuits

LM1084IT-3.3/NOPB View Datasheet(PDF) - Texas Instruments

Part NameDescriptionManufacturer
LM1084IT-3.3/NOPB 5-A Low Dropout Positive Regulators TI
Texas Instruments TI
LM1084IT-3.3/NOPB Datasheet PDF : 29 Pages
First Prev 11 12 13 14 15 16 17 18 19 20 Next Last
Typical Applications (continued)
8.2.7 High Current Lamp Driver Protection
A simple constant current source with protection can be designed by controlling the impedance between the
lamp and ground. The LM1084-ADJ shown in Figure 22 makes use of an external TTL or CMOS input to drive
the NPN transistor. This pulls the output of the regulator to a few tenths of a volt and puts the part into current
limit. Releasing the logic will reduce the current flow across the lamp into the normal operating current thereby
protecting the lamp during startup.
Figure 22. High Current Lamp Driver Protection
8.2.8 Battery Backup Regulated Supply
A regulated battery backup supply can be generated by using two fixed output voltage versions of the part as
shown in Figure 23. The top regulator supplies the Line voltage during normal operation, however when the input
is not available, the second regulator derives power from the battery backup and regulates it to 5 V based on the
LM1084-5.0. The diodes prevent the rails from back feeding into the supply and batteries.
Figure 23. Battery Backup Regulated Supply
Copyright © 1999–2015, Texas Instruments Incorporated
Product Folder Links: LM1084
Submit Documentation Feedback
Direct download click here


Share Link : 
All Rights Reserved© datasheetq.com 2015 - 2019  ] [ Privacy Policy ] [ Request Datasheet  ] [ Contact Us ]