www.德州仪器.com
TYPICALCHARACTERISTICS
TPS61060
TPS61061
TPS61062
SLVS538–NOVEMBER2004
PARAMETERTESTCONDITIONSMINTYPMAXUNIT
FEEDBACKFB
I
FB
FeedbackinputbiascurrentV
FB
=500mv11.5ua
V
FB
feedbackregulationvoltageiled=地,afterstart-up485500515mv
V
FB
feedbackregulationvoltageiled=高,afterstart-up240250260mv
powerswitchsynchronousrectifierandcurrentlimit(sw)
r
ds(在)
p-channelmosfeton-resistancev
O
=10v,isw=10ma2.53.7
Ω
n-channelmosfeton-resistancev
在
=V
GS
=3.6v,isw=100ma0.60.9
Ω
R
ds(在)
n-channelmosfeton-resistancev
在
=V
GS
=2.7v,isw=100ma0.71.0
Ω
I
swleak
SwitchleakagecurrentV
在
=V
SW
=6.0v,v
输出
=地,0.12µa
EN=GND
I
SW
n-channelmosfetcurrentlimitv
O
=10V325400475mA
振荡器
f
s
switchingfrequency0.81.01.2mhz
输出
VovpOutputovervoltageprotectionV
O
rising;tps610601414.516v
VovpOutputovervoltageprotectionV
O
rising;tps610611818.519.8v
VovpOutputovervoltageprotectionV
O
rising;tps6106222.223.525v
vovpoutputovervoltageprotectionhysteresistps61060/61/62,v
O
falling0.7v
vooutputvoltagethresholdforshort-circuitv
O
fallingV
在
–0.7v
发现
vooutputvoltagethresholdforshort-circuitv
O
risingV
在
–0.3v
发现
开始-向上,en=lowtohigh,
OUT=GND
V
在
=6V180
iprepre-chargecurrentandshortcircuitcurrentma
V
在
=3.6v95
V
在
=2.7v65
DMaximumdutycycle95%
TableofGraphs
图示
η
efficiencyvsledcurrent;2leds,iled=high2
vsledcurrent;3leds,iled=low3
vsledcurrent;3leds,iled=high4
vsledcurrent;4leds,iled=low5
vsledcurrent;4leds,iled=high6
vsledcurrent;5leds,iled=high7
PWMdimming8
digitalbrightnesscontrolfeedbackvoltagevsiledprogram-9
mingstep
LEDcurrentvsPWMdutycycle10
软-startoperation11
短的-circuitprotection12
Overvoltageprotection13
Inputvoltageripple14
5
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