Electronic Components Datasheet Search
  English  ▼
ALLDATASHEET.COM

X  

TNY253P Datasheet(PDF) 4 Page - Power Integrations, Inc.

Part # TNY253P
Description  Energy Efficient, Low Power Off-line Switchers
Download  18 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Manufacturer  POWERINT [Power Integrations, Inc.]
Direct Link  http://www.powerint.com
Logo POWERINT - Power Integrations, Inc.

TNY253P Datasheet(HTML) 4 Page - Power Integrations, Inc.

  TNY253P Datasheet HTML 1Page - Power Integrations, Inc. TNY253P Datasheet HTML 2Page - Power Integrations, Inc. TNY253P Datasheet HTML 3Page - Power Integrations, Inc. TNY253P Datasheet HTML 4Page - Power Integrations, Inc. TNY253P Datasheet HTML 5Page - Power Integrations, Inc. TNY253P Datasheet HTML 6Page - Power Integrations, Inc. TNY253P Datasheet HTML 7Page - Power Integrations, Inc. TNY253P Datasheet HTML 8Page - Power Integrations, Inc. TNY253P Datasheet HTML 9Page - Power Integrations, Inc. Next Button
Zoom Inzoom in Zoom Outzoom out
 4 / 18 page
background image
Rev E
02/12
TNY253/254/255
4
Figure 4. TinySwitch Operation at Heavy Load.
Figure 5. TinySwitch Operation at Medium Load.
V
DRAIN
V
EN
CLOCK
DC
DRAIN
I
MAX
PI-2255-061298
V
DRAIN
V
EN
CLOCK
DC
DRAIN
I
MAX
PI-2259-061298
TheresponsetimeofTinySwitchON/OFFcontrolschemeis
veryfastcomparedtonormalPWMcontrol.Thisprovideshigh
lineripplerejectionandexcellenttransientresponse.
Power Up/Down
TinySwitchrequiresonlya0.1µFcapacitorontheBYPASS
pin.Becauseofthesmallsizeofthiscapacitor,thepower-up
delayiskepttoanabsoluteminimum,typically0.3ms(Fig-
ure7).DuetothefastnatureoftheON/OFFfeedback,thereis
noovershootatthepowersupplyoutput.Duringpower-down,
thepowerMOSFETwillswitchuntiltherectifiedlinevoltage
dropstoapproximately12V.ThepowerMOSFETwillthen
remainoffwithoutanyglitches(Figure8).
Bias Winding Eliminated
TinySwitchdoesnotrequireabiaswindingtoprovidepower
to the chip.Instead it draws the power directly from the
DRAINpin(seeFunctionalDescriptionabove).Thishastwo
mainbenefits.Firstforanominalapplication,thiseliminates
thecostofanextrabiaswindingandassociatedcomponents.
Secondly,forchargerapplications,thecurrent-voltagechar-
acteristicoftenallowstheoutputvoltagetofalltolowvalues
whilestilldeliveringpower.Thistypeofapplicationnormally
requiresaforward-biaswindingwhichhasmanymoreassoci-
atedcomponents,noneofwhicharenecessarywithTinySwitch.
Current Limit Operation
EachswitchingcycleisterminatedwhentheDRAIN current
reachesthecurrentlimitoftheTinySwitch.Foragivenprimary
inductanceandinputvoltage,thedutycycleisconstant.How-
ever,dutycycledoeschangeinverselywiththeinputvoltage
providing“voltagefeed-forward”advantages:goodlineripple
rejectionandrelativelyconstantpowerdeliveryindependent
oftheinputvoltage.
44 kHz Switching Frequency (TNY253/254)
Switchingfrequency(withnocycleskipping)issetat44kHz.
Thisprovidesseveraladvantages.Athigherswitchingfrequen-
cies,thecapacitiveswitchinglossesareasignificantproportion
ofthepowerlossesinapowersupply.Athigherfrequencies,
thepreferredsnubbingschemesareRCDordiode-Zenerclamps.
However,duetothelowerswitchingfrequencyofTinySwitch,
itispossibletouseasimpleRCsnubber(andevenjustacapaci-
toralonein115VACapplicationsatpowerslevelsbelow4W).
Secondly,alowswitchingfrequencyalsoreducesEMIfiltering
requirements.At44kHz,thefirst,secondandthirdharmon-
icsareallbelow150kHzwheretheEMIlimitsarenotvery
restrictive.Forpowerlevelsbelow4Witispossibletomeet
worldwideEMIrequirementswithonlyresistiveandcapaci-
tivefilterelements(noinductorsorchokes).Thissignificantly
reducesEMIfiltercosts.
Finally,iftheapplicationrequiresstringentnoiseemissions
(suchasvideoapplications),thentheTNY253/254willallow
more effective use of diode snubbing (and other secondary
snubbingtechniques).Thelowerswitchingfrequencyallows
RCsnubberstobeusedtoreducenoise,withoutsignificantly
impactingtheefficiencyofthesupply.
130 kHz Switching Frequency (TNY255)
The switching frequency (with no cycle skipping) is set at
130kHz.ThisallowstheTNY255todeliver10Wwhilestill
usingthesamesize,lowcosttransformer(EE16)asusedby
theTNY253/254forlowerpowerapplications.


Similar Part No. - TNY253P

ManufacturerPart #DatasheetDescription
logo
Power Integrations, Inc...
TNY253P POWERINT-TNY253P Datasheet
498Kb / 20P
   TinySwitch Family Energy Efficient, Low Power Off-line Switchers
TNY253P POWERINT-TNY253P Datasheet
1Mb / 18P
   Energy Efficient, Low Power Off-line Switchers
TNY253P POWERINT-TNY253P Datasheet
1Mb / 18P
   Energy Efficient, Low Power Off-line Switchers
TNY253P POWERINT-TNY253P Datasheet
1Mb / 18P
   Energy Efficient, Low Power Off-line Switchers
TNY253P POWERINT-TNY253P Datasheet
1Mb / 18P
   Energy Efficient, Low Power Off-line Switchers
More results

Similar Description - TNY253P

ManufacturerPart #DatasheetDescription
logo
Power Integrations, Inc...
TNY253GN-TL POWERINT-TNY253GN-TL Datasheet
1Mb / 18P
   Energy Efficient, Low Power Off-line Switchers
TNY254GN POWERINT-TNY254GN Datasheet
1Mb / 19P
   Energy Efficient, Low Power Off-line Switchers
TNY254GN-TL POWERINT-TNY254GN-TL Datasheet
1Mb / 18P
   Energy Efficient, Low Power Off-line Switchers
TNY253PN POWERINT-TNY253PN Datasheet
1Mb / 18P
   Energy Efficient, Low Power Off-line Switchers
TNY255GN POWERINT-TNY255GN Datasheet
1Mb / 18P
   Energy Efficient, Low Power Off-line Switchers
TNY253GN POWERINT-TNY253GN Datasheet
1Mb / 18P
   Energy Efficient, Low Power Off-line Switchers
TNY255GN-TL POWERINT-TNY255GN-TL Datasheet
1Mb / 18P
   Energy Efficient, Low Power Off-line Switchers
TNY254PN POWERINT-TNY254PN Datasheet
1Mb / 18P
   Energy Efficient, Low Power Off-line Switchers
TNY253 POWERINT-TNY253_V01 Datasheet
1Mb / 18P
   Energy Efficient, Low Power Off-line Switchers
August 2016
TNY253 POWERINT-TNY253 Datasheet
498Kb / 20P
   TinySwitch Family Energy Efficient, Low Power Off-line Switchers
More results


Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18


Datasheet Download

Go To PDF Page


Link URL




Privacy Policy
ALLDATASHEET.COM
Does ALLDATASHEET help your business so far?  [ DONATE ] 

About Alldatasheet   |   Advertisement   |   Datasheet Upload   |   Contact us   |   Privacy Policy   |   Link Exchange   |   Manufacturer List
All Rights Reserved©Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
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