User Manual

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USER MANUAL
LINEAR VOTAGE REGULATOR 6A
V 1.0
Introducing the LVR
ThankyouforyourinterestinourPROTRONIKA2PROLINEARVOLTAGEREGULATOR6A.
Thislittledeviceisdesignedtosecurelypowerthereceiverofyourelectricorglowmodel.TheLVR6Aispowereditselfbya6to9Vbatteryand
givesonitsoutputastableregulatedvoltage
tosuityourservosrequirements.
TheLVR6AisalsoaperfectmatchforourPROTRONIKOptoESCs.

ThetechnologyusedontheLVR6AmakesitnoiselessanddonotshortentheR/Csystemrangeinanyway.
TheLVR6Aproducesareallinearvoltage,soservosoutput
powerisreallylinear.
PleasereadthismanualcarefullypriortouseyourLVR6APROTRONIK.
SPECIFICATIONS
Dimensions75x26x17mm
Weight 33g
Inputlead 170mmSiliconwire+UNI/JRconnector
Outputlead 2x170mmSiliconwire+UNI/JRconnector
Usedtechnology LowDropoutVotageRegulator
Inputvoltage 6to9V
Batterycompatibility NiCd,NiMH,LiIon,LiPoandLiFe
NochargeAmpdraw 0,005A(6,5V)/0,023A(8V)
Outputvoltage 5V‐5,2V‐5,4V‐5,8V‐6V+/‐2%(setbyjumperposition)
OutputAmp 6A(seetextbelow)
Voltagestability Betterthan1%(between0and5A)
Tempprotection Yes
Reverseinputpolarityprotection No
Outputshortsprotection Yes(AutoProtect)
Maxpowerdissipated 8Wfor30seconds
REGARDING THE LINEAR VOLTAGE REGULATOR 6A
REMINDERABOUTINTERNALBECs
MostaftheESCsonthemarketareequipedwithintegratedBECorU‐BEC.ThiskindofregulatorisdesignedtopowertheRxdevices(receiverand
servos)fromthemainbatteryusedtopowerthemodel.Soyoudon’tneedaRxbatteryanymore.This
solutionisseducingbutithasitslimits:
- Availablec urrentisrarelyabove2or3Asoyoucan’tusethisBEConlargeorevenmiddlescalemodelsneitherthanonamodelequiped
with4servosormore.
- Thepowerthatcanbedissipated
isextremlylow.Rarelyabove1W.
Thesetwoconditionsleadinyouinaveryhazardouswaysince:
- Numbersofservosishigherthan4,especiallywithhightorqueordigitalservos.
- Batteryvoltagereachesorexceeds10V
YourLVR6Aisusingalinearvoltage
regulationprinciple.Thisoffersalotofadvantages:
- Verystableoutputvoltageservostorqueisconstant
- NonoisegeneratednoreductionoftheR/Csystemrange
- Extremesimplicityreliability
- VerylowAmpdrawbetterefficiency
WHERE TO USE A LINEAR VOLTAGE REGULATOR
TheLVR6Aistobeusedwhenthebatteryvoltageishigherthanthevoltagerequiredbytheservos.
TopoweraRx,3solutions:
- ClassicNiMhbatterypack.Thisisusedformanyyearsonglowmodelsandglidersbutit’sheavyandselfdischarging.
- A
PRO‐TRONIKU‐Becpoweredbythemainbattery.VerylightweightbutneedsahighqualityRx.
- TheLVR6A.Thissolutionregroupsalltheadtvantagesofthetwoabovewithoutanytheirdrawback.
TheLVR6Aisdesignedtobepoweredbya2SLiPobatterywhichcapacity
mightbechoosenaccordingtotheRxconsumption.A2SLiPobattery
hasitsvoltagebetween8,4V(fullycharged)and6V(fullydischarged).ThisistheoptimumLVR6Arange.
Pleasenotethatlikeanylinearregulator,theLVR6Acan’tdeliveranoutputvoltagehigherthanitsinput
voltage.Sowhentheinputreachesa
voltagelowerthantheselectedoutput,theLVR6Awillonly“letthrough”thecurrent.Thismayoccurifyouhaveselectedanoutputvoltageof
5,8Vor6V.
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TheLVR6Acanalsobepoweredbya6cellsNi‐MHbattery.Inthiscase,theinputvoltageoftheLVR6Awillbebetween7,8V(fullycharged)and
4,8V(fullydischarged).ThisinputrangeexceedstheoptimumuseoftheLVR6A.Soifyou
useNiMhbatteries,werecommandnottosetthe
outputvoltagehigherthan5.2V

YourLVR6AisalsoequipedwithaLEDBargraphshowingtheremindingcapacityofyourLiPobattery.This«voltmeter»iscomposedof4LEDs(3
greenand1red)
WARNING:thebargraph
issettoshowthestatutofaLiPotypebattery.ThisinfomightnotbeusedwithNiMhbatteries.
HOW TO USE YOUR LINEAR VOLTAGE REGULATOR 6A
Assaidbefore,yourLVR6Aisalinearvoltageregulator.
Thismeansthattheoutputvoltagewillbesettoafixedvalue(jumperselected),regardlessoftheinputvoltage.
Thistypeofsystem,veryreliable,goeswithanobligatorywarmingdependingoftheusingconditions.Thiswarmingisnatural.
Tokeepthissystem
reliable,youhavetoensurethattheoveralltempwon’treachtheprotectiontemp(seedetailsabove).

Here’sanexampleshowingyouwhyandhowtheLVR6Aiswarming:
- Battery=LiPo2S2200mAh,whichvoltageis7,5V
- LVR6Aset
to5V
- Rxconsumptionisestimatedto3Aconstant(5standardanalogservos)
- Roomtemp20°C
TheLVR6Ahavetoeliminatetheexcessvoltage,thatis2,5V(7,5V–5V=2,5V).
This«elimination»isdoneintotheLVR6A,asheat.
Theradiatormustdissipate7,5W(3Ax2,5V=7,5W).Thisvaluerepresentsthelimit
acceptedbytheLVR6A,supposingitisperfectlycooled!
Forcomparison,notethatsomeSMDsolderingironsareonly6W…
ThisisthereasonwhytheLVR6AMUSTBEcooled.
Withoutthepropercooling,youaretakingthechancethattheLVR6AswitchestotheAuto
Protectmode,whichprobablymeansacrash.

ThisexamplehelpstounderstandthatthepowerdissipatedasheatbyyourLVRisdependentonthevoltagedifferencebetweenitsinputand
output
ontheonehand,andthecurrentflowingontheother.Thehigherthevoltagedifferenceis,moretheheatdissipationwillbeimportant.
Similarly,morethepowerishigh,morethedissipationwillbehigh.
Finally,moretheambienttemperatureishigh,morethepowerofdissipationoftheradiator
islow.Youshouldalwaystakeintoaccountthese
threeparameterstouseyourLVR6Ainthebestconditionsofsafety.

Youcanfindoutputvoltagecurvesattheendofthismanualaccordingtothepositionofthejumper,thevoltageandcurrentconsumption.Itisup
to
youtodeterminefromthesecurvestheminimumsupplyvoltageoftheLVR6A regardingyourapplication.
Example:Ifyouchooseanoutputvoltageof5.4V(5.4Vjumperposition),andthatpermanentconsumptionofyourmodelis3A(bluecurve)then
thevoltageofyourLVR6Awillremainabove6.5V.Below,theoutputvoltagewillbereducedaccordingly.Thus,againforthesamemodel,the
outputvoltagewillbe5.1Vifthevoltagedropsto6V,whichisstillquiteacceptable(6V=maxdischargevoltageofa
2SLiPobattery)
LVR 6A OVERALL SPECIFICATIONS
TheoutputoftheLVR6Aisprotectedagainstshorts.Incaseofanexcessofconsumptionorashortcircuit,thedevicewillnotbedestroyed.
YourLVR6AswitchesdirectlytotheAutoProtectmodeandshutsdownitsoutput.Whenconsumptiondropsbackbelowtheratedcurrent,
the
outputvoltagereturnstoitsnominalvalue.
YourLVR6AwillalsoswitchtotheAutoProtectiftempgoesabove65°C.
WARNING:Wedrawyourattentiontothefactthattheonsetofoneorotheroftheseprotectionsduringaflightcancausethemodeltocrash.It
isyourresponsibilitytotakeallnecessaryprecautionssothatthissituationdoesnothappen.PROTRONIKwillinnowaybeheldliableforthecrash
ofamodel.
YourLVR6Ahasajumperselectionofoutputvoltage,allowingyoutoselectthevoltagepowerbestsuitedtotheservosinyourmodel.Read
thefollowingcharacteristicsofthedatasheetofthemanufacturer,andsetthejumperonaccordingly.Ifyourservosarecompatible,youcan
supply
avoltagehigherthan5Vandbenefitofoptimumspeedandtorque.Youcanalsouseanoutputvoltageof6Vifyourmodelusesadual
powerproducingavoltagedropastheX‐BICPROTRONIKaccessories(checktheinstructionsfortheaccessoryinquestion),tohaveanoptimal
voltage
supply.
YourLVR6Aisdesignedtoovertakecurrentpeaksgeneratedbytheservosduringaflight.Thus,averybriefinrushcurrentupto10Awillnot
beaproblem.
YourLVR6Ahasaspecialcircuitthatadaptsthebestoutputvoltageversuscurrentconsumption.Itisthereforenormalthattheoutput
voltagemeasuredwhentheservosareatrestisslightlylessthanthatindicatedbythepositionofthejumper.Inflight,whenconsumptionis
normal,yourLVR6Aissuethetensionyouhavechosen.Powerandspeedoftheservosareoptimizedduringtheentireflight!
YourLVR6Aisprovidedwithhighqualitysiliconepowercordsmadeof0.5mm²twistedwires.Thischoiceallowsaverylowvoltagedrop,
despitethehighcurrentpassingthroughthewires.Thus,at3A,thevoltagedropisapproximately0.1V.Underacurrentof5A,thevoltagedrop
remainsbelow0.15V.Weadviseyounotunderanycircumstancesextendthesepowercords,otherwisesignificantlyincreasethevoltagedrop.
Moreover,thesecordsaresuppliedsiliconetwisted.Thesetwistshavenotadecorativerole.Theyareessentialfortheproperfunctioningofthe
device.Regularlychecktheyaretight.Ifnecessary,feelfreetotightenthesetwists.