Zakładka z wyszukiwarką danych komponentów
  Polish  ▼
ALLDATASHEET.PL

X  

LTM4676A Arkusz danych(PDF) 67 Page - Linear Technology

Numer części LTM4676A
Szczegółowy opis  Dual 13A or Single 26A 關Module Regulator with Digital Power System Management
Download  136 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Producent  LINER [Linear Technology]
Strona internetowa  http://www.linear.com
Logo LINER - Linear Technology

LTM4676A Arkusz danych(HTML) 67 Page - Linear Technology

Back Button LTM4676A Datasheet HTML 63Page - Linear Technology LTM4676A Datasheet HTML 64Page - Linear Technology LTM4676A Datasheet HTML 65Page - Linear Technology LTM4676A Datasheet HTML 66Page - Linear Technology LTM4676A Datasheet HTML 67Page - Linear Technology LTM4676A Datasheet HTML 68Page - Linear Technology LTM4676A Datasheet HTML 69Page - Linear Technology LTM4676A Datasheet HTML 70Page - Linear Technology LTM4676A Datasheet HTML 71Page - Linear Technology Next Button
Zoom Inzoom in Zoom Outzoom out
 67 / 136 page
background image
LTM4676A
67
4676afa
For more information www.linear.com/LTM4676A
applicaTions inForMaTion
on DC1811B-B hardware; a 4-layer FR4 PCB measuring
99mm × 133mm × 1.6mm using outer and inner copper
weights of 2oz and 1oz, respectively. The power loss
curves are taken at room temperature, and are increased
with multiplicative factors with ambient temperature.
These approximate factors are listed in Table 14.
(Compute the factor by interpolation, for intermediate
temperatures.) The derating curves are plotted with the
LTM4676A’sparalleledoutputsinitiallysourcingupto26A
and the ambient temperature at 30°C. The output voltages
are 1V, 1.8V and 3.3V. These are chosen to include the
lower and higher output voltage ranges for correlating
the thermal resistance. Thermal models are derived
from several temperature measurements in a controlled
temperature chamber along with thermal modeling
analysis. The junction temperatures are monitored while
ambient temperature is increased with and without air
flow, and with and without a heat sink attached with
thermally conductive adhesive tape. The BGA heat sinks
evaluated in Table 18 (and attached to the LTM4676A
with thermally conductive adhesive tape listed in Table
19) yield very comparable performance in laminar airflow
despite being visibly different in construction and form
factor. The power loss increase with ambient temperature
change is factored into the derating curves. The junctions
are maintained at 120°C maximum while lowering output
current or power while increasing ambient temperature.
The decreased output current decreases the internal
module loss as ambient temperature is increased. The
monitored junction temperature of 120°C minus the
ambientoperatingtemperaturespecifieshowmuchmodule
temperaturerisecanbeallowed.AsanexampleinFigure 15,
the load current is derated to ~19A at ~80°C ambient
with 400LFM airflow and no heat sink and the room
temperature (25°C) power loss for this 12VIN to 1VOUT
at 19AOUT condition is ~4W. A 4.8W loss is calculated by
multiplyingthe~4Wroomtemperaturelossfromthe12VIN
to 1VOUT power loss curve at 19A (Figure 11), with the 1.2
multiplying factor at 80°C ambient (from Table 14). If the
80°C ambient temperature is subtracted from the 120°C
junction temperature, then the difference of 40°C divided
by 4.8W yields a thermal resistance, θJA, of 8.3°C/W—in
good agreement with Table 15. Table 15, Table 16 and
Table17provideequivalentthermalresistancesfor1V,1.8V
and3.3Voutputswithandwithoutairflowandheatsinking.
The derived thermal resistances in Table 15, Table 16
and Table 17 for the various conditions can be multiplied
by the calculated power loss as a function of ambient
temperature to derive temperature rise above ambient,
thus maximum junction temperature. Room temperature
power loss can be derived from the efficiency curves
in the Typical Performance Characteristics section and
adjusted with ambient temperature multiplicative factors
from Table 14.
Table 14. Power Loss Multiplicative Factors vs Ambient
Temperature
AMBIENT TEMPERATURE
POWER LOSS MULTIPLICATIVE
FACTOR
Up to 40°C
1.00
50°C
1.05
60°C
1.10
70°C
1.15
80°C
1.20
90°C
1.25
100°C
1.30
110°C
1.35
120°C
1.40


Podobny numer części - LTM4676A

ProducentNumer częściArkusz danychSzczegółowy opis
logo
Linear Technology
LTM4676A LINER-LTM4676A Datasheet
695Kb / 34P
   25A DC/DC Step-Down 關Module Regulator
logo
Analog Devices
LTM4676A AD-LTM4676A Datasheet
2Mb / 116P
   60V Dual Output Step-Up Controller with Digital Power System Management
logo
Linear Technology
LTM4676A LINER-LTM4676A Datasheet
1Mb / 34P
   30A DC/DC Step-Down 關Module Regulator
logo
Analog Devices
LTM4676A AD-LTM4676A Datasheet
3Mb / 118P
   Dual Loop 8-Phase Step-Down DC/DC Controller with Digital Power System Management
Rev. B
logo
Linear Technology
LTM4676A LINER-LTM4676A Datasheet
911Kb / 22P
   PolyPhase Step-Down Slave Controller for Digital Power System Management
More results

Podobny opis - LTM4676A

ProducentNumer częściArkusz danychSzczegółowy opis
logo
Linear Technology
LTM4676 LINER-LTM4676_15 Datasheet
1Mb / 78P
   Dual 13A or Single 26A Module Regulator with Digital Power System Management
LTM4676A LINER-LTM4676A_15 Datasheet
1Mb / 130P
   Dual 13A or Single 26A Module Regulator with Digital Power System Management
LTM4620 LINER-LTM4620 Datasheet
2Mb / 36P
   Dual 13A or Single 26A DC/DC 關Module Regulator
LTM4620 LINER-LTM4620_15 Datasheet
657Kb / 40P
   Dual 13A or Single 26A DC/DC Module Regulator
LTM4620A LINER-LTM4620A_15 Datasheet
716Kb / 40P
   Dual 13A or Single 26A DC/DC Module Regulator
LTM4620A LINER-LTM4620A Datasheet
554Kb / 36P
   Dual 13A or Single 26A DC/DC 關Module Regulator Frequency Synchronization
logo
Analog Devices
LTM4678 AD-LTM4678 Datasheet
6Mb / 124P
   Dual 25A or Single 50A 關Module Regulator with Digital Power System Management
LTM4686B AD-LTM4686B Datasheet
3Mb / 130P
   Ultrathin Dual 14A or Single 28A 關Module Regulator with Digital Power System Management
Rev. 0
logo
Linear Technology
LTM4676EY LINER-LTM4676EY Datasheet
2Mb / 10P
   26A Step-Down 關Module Regulator with PMBus Power System Management
LTM4675 LINER-LTM4675_15 Datasheet
2Mb / 128P
   Dual 9A or Single 18A Module Regulator with Digital Power System Management
More results


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 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100  ...More


Arkusz danych Pobierz

Go To PDF Page


Link URL




Polityka prywatności
ALLDATASHEET.PL
Czy Alldatasheet okazała się pomocna?  [ DONATE ] 

O Alldatasheet   |   Reklama   |   Kontakt   |   Polityka prywatności   |   Linki   |   Lista producentów
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
Indian : Alldatasheet.in  |   Mexican : Alldatasheet.com.mx  |   British : Alldatasheet.co.uk  |   New Zealand : Alldatasheet.co.nz
Family Site : ic2ic.com  |   icmetro.com