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electricalcharacteristics(持续)
TPS61140
TPS61141
SLVS624A–JANUARY2006–REVISEDFEBRUARY2006
vin=3.6v,selx=vin,rset=80k
Ω
,vout=15v,viout=15v,t
一个
=–40
°
Cto85
°
c,typicalvaluesareatt
一个
=25
°
c(除非
otherwisenoted)
PARAMETERTESTCONDITIONSMINTYPMAXUNIT
VOLTAGEANDCURRENTCONTROL
I
FB
VoltagefeedbackinputbiascurrentV
FB
=1.229v100na
V
FB
voltagefeedbackregulationvoltage1.2041.2291.254v
V
ISET
isetpinvoltage1.2041.2291.254v
K
ISET
currentmultipleriout/iset820900990
V
IFB
IFBRegulationvoltage300330360mV
V
ifb_l
IFBlowthreshold
(1)
60mV
德州仪器
下沉
CurrentsinksettletimeMeasuredfromSELxrisingedge
(2)
6
µ
s
I
leak
IFBpinleakagecurrentIFBvoltage=25V1
µ
一个
V
delta
iout-voutregulationthresholdiout-vout270330380mv
V
delta_l
iout-voutlowthreshold
(3)
45mV
I
ldo_leak
ldoleakagecurrentiout=25v,vout=0v1
µ
一个
psrrldopsrriout–vout=330mv,2ma,20khz20db
POWERSWITCHANDDIODE
R
ds(在)
n-channelmosfeton-resistancev
在
=V
GS
=3.6v0.60.9
Ω
I
ln_nfet
n-channelleakagecurrentv
DS
=25V1
µ
一个
V
F
powerdiodeforwardvoltageid=0.7a0.831.0v
OCANDOVP
dualoutput,v(iout)=15v,d=76%0.751.01.26
singleoutput(pfm)0.270.320.38
I
LIM
n-channelmosfetcurrentlimit
(4)
一个
singleoutput(pwm),v(iout)=15v,0.400.550.70
D=76%
I
ldo_最大值
LDOmaxoutputcurrentIout–Vout=330mV35mA
I
ifb_最大值
CurrentsinkmaxoutputcurrentIFB=330mV35mA
TPS61140272829
V
ovp
OvervoltagethresholdV
TPS61141212223
TPS61140550
V
ovp_hys
OvervoltagehysteresismV
TPS61141440
PWMANDPFMCONTROL
f
S
oscillatorfrequency1.01.21.5mhz
D
最大值
maximumdutycyclepwm,vfb=1.0v9093%
T
在_最大值
maximumontimepfmonly5.7
µ
s
T
止_最小值
MinimumofftimePFMonly413ns
THERMALSHUTDOWN
T
关闭
Thermalshutdownthreshold160
°
C
T
hys
Thermalshutdownthresholdhysteresis15
°
C
(1)whentheifbpinvoltagedropsthisamountbelowvifb,theifbpinisusedastheboostconverterfeedbackiftheiout-voutvoltageis
inregulation.thisonlyoccursinboth-onmode.
(2)thisspecificationdeterminestheminimumontimerequiredforpwmdimming.usingthisspecification,themaximumpwmdimming
frequencycanbecalculatedfromtheminimumdutycyclerequiredintheapplication.
(3)wheniout-voutvoltagedropsthisamountbelowv
delta
,iout-voutisusedastheboostrconverterfeedbackinputregardlessoftheifb
电压.thisonlyoccursinboth-onmode.
(4)measuredwithdccurrent.seeapplicationinformationfordetails.
5
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