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LM3410XMFE Scheda tecnica(PDF) 21 Page - Texas Instruments

Il numero della parte LM3410XMFE
Spiegazioni elettronici  525kHz/1.6MHz, Constant Current Boost and SEPIC LED Driver with Internal Compensation
PDF  49 Pages
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Produttore elettronici  TI [Texas Instruments]
Homepage  http://www.ti.com
Logo TI - Texas Instruments

LM3410XMFE Scheda tecnica(HTML) 21 Page - Texas Instruments

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LM3410, LM3410Q
www.ti.com
SNVS541G – OCTOBER 2007 – REVISED MAY 2013
Table 5. Operating Conditions
VIN
3.3V
VOUT
16.7V
ILED
50mA
VD
0.45V
fSW
1.60MHz
IQ
3mA
tRISE
10nS
tFALL
10nS
RDSON
225m
Ω
LDCR
75m
Ω
D
0.82
IIN
0.31A
ΣPCOND + PSW + PDIODE + PIND + PQ = PLOSS
(36)
Quiescent Power Loss:
PQ = IQ x VIN = 10 mW
(37)
Switching Power Loss:
PSWR = 1/2(VOUT x IIN x fSW x tRISE) ≊ 40 mW
(38)
PSWF = 1/2(VOUT x IIN x fSW x tFALL) ≊ 40 mW
(39)
PSW = PSWR + PSWF = 80 mW
(40)
Internal NFET Power Loss:
RDSON = 225 mΩ
(41)
PCONDUCTION = IIN
2 x D x R
DSON = 17 mW
(42)
IIN = 310 mA
(43)
Diode Loss:
VD = 0.45V
(44)
PDIODE = VD x ILED = 23 mW
(45)
Inductor Power Loss:
RDCR = 75 mΩ
(46)
PIND = IIN
2 x R
DCR = 7 mW
(47)
Total Power Losses are:
Table 6. Power Loss Tabulation
VIN
3.3V
VOUT
16.7V
ILED
50mA
POUT
825W
VD
0.45V
PDIODE
23mW
fSW
1.6MHz
IQ
10nS
PSWR
40mW
tRISE
10nS
PSWF
40mW
IQ
3mA
PQ
10mW
RDSON
225m
Ω
PCOND
17mW
LDCR
75m
Ω
PIND
7mW
D
0.82
η
85%
PLOSS
137mW
Copyright © 2007–2013, Texas Instruments Incorporated
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Product Folder Links: LM3410 LM3410Q



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