Motor de Búsqueda de Datasheet de Componentes Electrónicos
Selected language     Spanish  ▼

Delete All
ON OFF
ALLDATASHEET.ES

X  

Preview PDF Download HTML

TPS61085 Datasheet(PDF) 11 Page - Texas Instruments

Click here to check the latest version.
No. de Pieza. TPS61085
Descripción  650-kHz,1.2-MHz, 18.5-V Step-Up DC-DC Converter
Descarga  30 Pages
Scroll/Zoom Zoom In 100% Zoom Out
Fabricante  TI1 [Texas Instruments]
Página de inicio  http://www.ti.com
Logo 

TPS61085 Datasheet(HTML) 11 Page - Texas Instruments

Zoom Inzoom in Zoom Outzoom out
 11 / 30 page
background image
D
avg
forward
P
I
V
=
×
avg
OUT
I
I
=
2
-
IN
S
IN
S
OUT
S
V
V
V
L
V
I
f
0.35
h
æ
ö
æ
ö
æ
ö
=
×
×
ç
÷
ç
÷
ç
÷
×
è
ø
è
ø è
ø
TPS61085
www.ti.com
SLVS859B – JUNE 2008 – REVISED DECEMBER 2014
(5)
with
VIN
Minimum input voltage
VS
Output voltage
Iout
Maximum output current in the application
fS
Converter switching frequency (typically 1.2 MHz or 650 kHz)
η
Estimated converter efficiency (please use the number from the efficiency plots or 90% as an estimation)
Table 3. Inductor Selection
L
COMPONENT
SIZE
DCR TYP
SUPPLIER
Isat (A)
CODE
(
μH)
(L×W×H mm)
(m
Ω)
1.2 MHz
3.3
Sumida
CDH38D09
4 x 4 x 1
240
1.25
4.7
Sumida
CDPH36D13
5 × 5 × 1.5
155
1.36
3.3
Sumida
CDPH4D19F
5.2 x 5.2 x 2
33
1.5
3.3
Sumida
CDRH6D12
6.7 x 6.7 x 1.5
62
2.2
4.7
Würth Elektronik
7447785004
5.9 × 6.2 × 3.3
60
2.5
5
Coilcraft
MSS7341
7.3 × 7.3 × 4.1
24
2.9
650 kHz
6.8
Sumida
CDP14D19
5.2 x 5.2 x 2
50
1
10
Coilcraft
LPS4414
4.3 × 4.3 × 1.4
380
1.2
6.8
Sumida
CDRH6D12/LD
6.7 x 6.7 x 1.5
95
1.25
10
Sumida
CDR6D23
5 × 5 × 2.4
133
1.75
10
Würth Elektronik
744778910
7.3 × 7.3 × 3.2
51
2.2
6.8
Sumida
CDRH6D26HP
7 x 7 x 2.8
52
2.9
9.2.2.3 Rectifier Diode Selection
To achieve high efficiency, a Schottky type should be used for the rectifier diode. The reverse voltage rating
should be higher than the maximum output voltage of the converter. The averaged rectified forward current Iavg,
the Schottky diode needs to be rated for, is equal to the output current IOUT:
(6)
Usually a Schottky diode with 2 A maximum average rectified forward current rating is sufficient for most
applications. The Schottky rectifier can be selected with lower forward current capability depending on the output
current Iout but has to be able to dissipate the power. The dissipated power, PD , is the average rectified forward
current times the diode forward voltage, Vforward .
(7)
Typically the diode should be able to dissipate around 500mW depending on the load current and forward
voltage.
Table 4. Rectifier Diode Selection
CURRENT
COMPONENT
PACKAGE
Vr
Vforward / Iavg
SUPPLIER
RATING Iavg
CODE
TYPE
750 mA
20 V
0.425 V /
Fairchild Semiconductor
FYV0704S
SOT 23
750 mA
1 A
20 V
0.39 V / 1 A
NXP
PMEG2010AEH
SOD 123
1 A
20 V
0.52 V / 1 A
Vishay Semiconductor
B120
SMA
1 A
20 V
0.5 V / 1 A
Vishay Semiconductor
SS12
SMA
Copyright © 2008–2014, Texas Instruments Incorporated
Submit Documentation Feedback
11
Product Folder Links: TPS61085


Html Pages

1  2  3  4  5  6  7  8  9  10  11  12  13  14  15  16  17  18  19  20  21  22  23  24  25  26  27  28  29  30 


Datasheet Download




Enlace URL




Privacy Policy
ALLDATASHEET.ES
Does ALLDATASHEET help your business so far?  [ DONATE ]  

Todo acerca de Alldatasheet   |   Publicidad   |   Contáctenos   |   Política de Privacidad   |   Favorito   |   Intercambio de Enlaces   |   Lista de Fabricantes
All Rights Reserved© Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn