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PINASSIGNMENT
C2−
C1−
C1+
C2+
PGND
VIN
EN1
D2
D1
VOUT
ISET
地
NC
NC
D3
31 2
7
5
6
8
12 11 10
9
15
13
14
16
EN2
4
qfn pACKAGE
(t运算 视图)
TPS60231
SLVS544–OCTOBER2004
TerminalFunctions
终端
i/odescription
nameno.
C1+10–ConnecttotheflyingcapacitorC1
C1–11–ConnecttotheflyingcapacitorC1
C2+9–ConnecttotheflyingcapacitorC2
C2–12–ConnecttotheflyingcapacitorC2
d1-d36-4icurrentsinkinput.connectthecathodeofthewhiteledstotheseinputs.
enableinput.alogichighenablestheconverter,logiclowforcesthedeviceintoshutdownmodereducing
EN115I
thesupplycurrenttolessthan1µaifen2istiedtognd.
anappliedpwmsignalreducestheledcurrentasafunctionofthedutycycleofthepwmsignal.en1and
en2canbetiedtogetherforpwmdimmingbetween0maandthemaximumsetwithiset.en1anden2
EN216I
canalsobeusedfordigitaldimmingwith4stepsfrom0matothemaximumcurrentsetwithiset.seethe
applicationsectionformoredetails.
GND14–Analogground
iset1iconnectaresistorbetweenthispinandgndtosetthemaximumcurrentthroughtheleds.
nc2,3–nointernalconnection
PGND7–Powerground
VIN13ISupplyvoltageinput
vout80connecttheoutputcapacitorandtheanodeoftheledstothispin.
PowerPAD––ConnectwithPGNDandGND
4
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