Os motores de busca de Datasheet de Componentes eletrônicos
  Portuguese  ▼
ALLDATASHEETPT.COM

X  

LTM8067 Folha de dados(PDF) 14 Page - Linear Technology

Nome de Peças LTM8067
Descrição Electrónicos  2.8VIN to 40VIN Isolated 關Module DC/DC Converter
Download  20 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Fabricante Electrônico  LINER [Linear Technology]
Página de início  http://www.linear.com
Logo LINER - Linear Technology

LTM8067 Folha de dados(HTML) 14 Page - Linear Technology

Back Button LTM8067 Datasheet HTML 10Page - Linear Technology LTM8067 Datasheet HTML 11Page - Linear Technology LTM8067 Datasheet HTML 12Page - Linear Technology LTM8067 Datasheet HTML 13Page - Linear Technology LTM8067 Datasheet HTML 14Page - Linear Technology LTM8067 Datasheet HTML 15Page - Linear Technology LTM8067 Datasheet HTML 16Page - Linear Technology LTM8067 Datasheet HTML 17Page - Linear Technology LTM8067 Datasheet HTML 18Page - Linear Technology Next Button
Zoom Inzoom in Zoom Outzoom out
 14 / 20 page
background image
LTM8067
14
8067fc
For more information www.linear.com/LTM8067
APPLICATIONS INFORMATION
age at the VIN pin of the LTM8067 can ring to more than
twice the nominal input voltage, possibly exceeding the
LTM8067’s rating and damaging the part. If the input
supply is poorly controlled or the user will be plugging
the LTM8067 into an energized supply, the input network
should be designed to prevent this overshoot. This can be
accomplished by installing a small resistor in series to VIN,
but the most popular method of controlling input voltage
overshoot is adding an electrolytic bulk capacitor to the
VIN net. This capacitor’s relatively high equivalent series
resistance damps the circuit and eliminates the voltage
overshoot. The extra capacitor improves low frequency
ripplefilteringandcanslightlyimprovetheefficiencyofthe
circuit, though it can be a large component in the circuit.
Thermal Considerations
The LTM8067 output current may need to be derated if it
is required to operate in a high ambient temperature. The
amount of current derating is dependent upon the input
voltage, output power and ambient temperature. The
temperature rise curves given in the Typical Performance
Characteristicssectioncanbeusedasaguide.Thesecurves
were generated by the LTM8067 mounted to a 58cm2
4-layer FR4 printed circuit board. Boards of other sizes
and layer count can exhibit different thermal behavior, so
it is incumbent upon the user to verify proper operation
over the intended system’s line, load and environmental
operating conditions.
Forincreasedaccuracyandfidelitytotheactualapplication,
many designers use FEA to predict thermal performance.
To that end, the Pin Configuration section of the data sheet
typically gives four thermal coefficients:
θJA: Thermal resistance from junction to ambient
θJCbottom: Thermal resistance from junction to the bot-
tom of the product case
θJCtop: Thermal resistance from junction to top of the
product case
θJCboard:Thermalresistancefromjunctiontotheprinted
circuit board.
While the meaning of each of these coefficients may
seem to be intuitive, JEDEC has defined each to avoid
Minimum Load
Due to the nature of the flyback regulator in general, and
the LTM8067 control scheme specifically, the LTM8067
requires a minimum load for proper operation. Other-
wise, the output may go out of regulation if the load is
too light. The most common way to address this is to
place a resistor across the output. The Minimum Load
Current vs VOUT Over Full Output Voltage Range graph
in the Typical Performance Characteristics section may
be used as a guide in selecting the resistor. Note that this
graph describes room temperature operation. If the end
applicationoperatesatacoldertemperature,theminimum
load requirement may be higher and the minimum load
condition must be characterized for the lowest operating
temperature.
If it is impractical to place a resistive load permanently
across the output, a resistor and Zener diode may be used
instead, as shown in Figure 2. While the minimum load
resistor mentioned in the prior paragraph will always draw
current while the LTM8067 output is powered, the series
resistor-Zener diode combination will only draw current if
the output is too high. When using this circuit, take care to
ensure that the characteristics of the Zener diode are ap-
propriatefortheintendedapplication’stemperaturerange.
Figure 2: Use a Resistor and Zener Diode to Meet the
Minimum Load Requirement
Hot-Plugging Safely
The small size, robustness and low impedance of ceramic
capacitors make them an attractive option for the input
bypass capacitor of the LTM8067. However, these capaci-
tors can cause problems if the LTM8067 is plugged into a
live supply (see Linear Technology Application Note 88 for
a complete discussion). The low loss ceramic capacitor
combined with stray inductance in series with the power
source forms an underdamped tank circuit, and the volt-
LTM8067
VOUTP
VOUTN
8067 F02


Nº de peça semelhante - LTM8067

Fabricante ElectrônicoNome de PeçasFolha de dadosDescrição Electrónicos
logo
Linear Integrated Syste...
LTM8067 LINEAR-LTM8067 Datasheet
1Mb / 18P
   Dual SEPIC or Inverting Module DC DC Converter
logo
Linear Technology
LTM8067 LINER-LTM8067 Datasheet
1Mb / 20P
   Dual SEPIC or Inverting 關Module DC/DC Converter
LTM8067 LINER-LTM8067 Datasheet
889Kb / 20P
   2.8VIN to 40VIN Isolated 關Module DC/DC Converter with LDO Post Regulator
More results

Descrição semelhante - LTM8067

Fabricante ElectrônicoNome de PeçasFolha de dadosDescrição Electrónicos
logo
Linear Technology
LTM8068 LINER-LTM8068 Datasheet
889Kb / 20P
   2.8VIN to 40VIN Isolated 關Module DC/DC Converter with LDO Post Regulator
LTM8048 LINER-LTM8048 Datasheet
347Kb / 20P
   3.1VIN to 32VIN Isolated 關Module DC/DC Converter
LTM8046 LINER-LTM8046 Datasheet
383Kb / 20P
   3.1VIN to 31VIN, 2kVAC Isolated DC/DC 關Module Converter
LTM8046 LINER-LTM8046_15 Datasheet
383Kb / 20P
   Isolated DC/DC Module Converter
logo
Astec America, Inc
AIF25R48 ASTEC-AIF25R48_03 Datasheet
742Kb / 29P
   Isolated DC/DC Converter Module
logo
Linear Technology
LTM8047 LINER-LTM8047_15 Datasheet
343Kb / 18P
   3.1VIN to 32VIN Isolated Module DC/DC Converter
LTM8057 LINER-LTM8057_15 Datasheet
233Kb / 20P
   3.1VIN to 31VIN Isolated Module DC/DC Converter
logo
Bellnix Co.,Ltd.
BSU-1.8S1R0 BELLNIX-BSU-1.8S1R0 Datasheet
3Mb / 20P
   High-Efficiency 關Module Non-Isolated POL DC-DC Converter
BSU12-3.3S3R0 BELLNIX-BSU12-3.3S3R0 Datasheet
1Mb / 18P
   High-Efficiency 關Module Non-Isolated POL DC-DC Converter
BSU12-3.3S1R0 BELLNIX-BSU12-3.3S1R0 Datasheet
1Mb / 18P
   High-Efficiency 關Module Non-Isolated POL DC-DC Converter
More results


Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20


Folha de dados Download

Go To PDF Page


Ligação URL




Privacy Policy
ALLDATASHEETPT.COM
ALLDATASHEET é útil para você?  [ DONATE ] 

Sobre Alldatasheet   |   Publicidade   |   Contato conosco   |   Privacy Policy   |   roca de Link   |   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
Indian : Alldatasheet.in  |   Mexican : Alldatasheet.com.mx  |   British : Alldatasheet.co.uk  |   New Zealand : Alldatasheet.co.nz
Family Site : ic2ic.com  |   icmetro.com