データシートサーチシステム
  Japanese  ▼
ALLDATASHEET.JP

X  

LMZ14203EXT データシート(PDF) 11 Page - Texas Instruments

Click here to check the latest version.
部品番号 LMZ14203EXT
部品情報  3A SIMPLE SWITCHER Power Module With 42-V Maximum Input Voltage for Military and Rugged Applications
Download  31 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
メーカー  TI [Texas Instruments]
ホームページ  http://www.ti.com
Logo TI - Texas Instruments

LMZ14203EXT データシート(HTML) 11 Page - Texas Instruments

Back Button LMZ14203EXT Datasheet HTML 7Page - Texas Instruments LMZ14203EXT Datasheet HTML 8Page - Texas Instruments LMZ14203EXT Datasheet HTML 9Page - Texas Instruments LMZ14203EXT Datasheet HTML 10Page - Texas Instruments LMZ14203EXT Datasheet HTML 11Page - Texas Instruments LMZ14203EXT Datasheet HTML 12Page - Texas Instruments LMZ14203EXT Datasheet HTML 13Page - Texas Instruments LMZ14203EXT Datasheet HTML 14Page - Texas Instruments LMZ14203EXT Datasheet HTML 15Page - Texas Instruments Next Button
Zoom Inzoom in Zoom Outzoom out
 11 / 31 page
background image
0.47 éF
6.8 éH
Co
CIN
Cvcc
FB
EN
SS
Vin
Linear reg
RON
Timer
Css
RON
RFBT
RFBB
CFF
Regulator IC
VO
Internal
Passives
VOUT
GND
VIN 1
2
3
4
5
6
7
LMZ14203EXT
www.ti.com
SNVS666H – JUNE 2010 – REVISED OCTOBER 2015
7 Detailed Description
7.1 Overview
7.1.1 COT Control Circuit Overview
Constant ON-Time control is based on a comparator and an ON-time one-shot, with the output voltage feedback
compared with an internal 0.8-V reference. If the feedback voltage is below the reference, the main MOSFET is
turned on for a fixed ON-time determined by a programming resistor RON. RON is connected to VIN such that ON-
time is reduced with increasing input supply voltage. Following this ON-time, the main MOSFET remains off for a
minimum of 260 ns. If the voltage on the feedback pin falls below the reference level again the ON-time cycle is
repeated. Regulation is achieved in this manner.
7.2 Functional Block Diagram
7.3 Feature Description
7.3.1 Output Overvoltage Comparator
The voltage at FB is compared to a 0.92-V internal reference. If FB rises above 0.92 V the ON-time is
immediately terminated. This condition is known as overvoltage protection (OVP). It can occur if the input voltage
is increased very suddenly or if the output load is decreased very suddenly. When OVP is activated, the top
MOSFET ON-times will be inhibited until the condition clears. Additionally, the synchronous MOSFET will remain
on until inductor current falls to zero.
7.3.2 Current Limit
Current limit detection is carried out during the OFF-time by monitoring the current in the synchronous MOSFET.
Referring to the Functional Block Diagram, when the top MOSFET is turned off, the inductor current flows
through the load, the PGND pin and the internal synchronous MOSFET. If this current exceeds 4.2 A (typical) the
current limit comparator disables the start of the next ON-time period. The next switching cycle will occur only if
the FB input is less than 0.8 V and the inductor current has decreased below 4.2 A. Inductor current is monitored
during the period of time the synchronous MOSFET is conducting. So long as inductor current exceeds 4.2 A,
further ON-time intervals for the top MOSFET will not occur. Switching frequency is lower during current limit due
to the longer OFF-time. It must also be noted that current limit is dependent on both duty cycle and temperature.
Copyright © 2010–2015, Texas Instruments Incorporated
Submit Documentation Feedback
11
Product Folder Links: LMZ14203EXT


同様の部品番号 - LMZ14203EXT

メーカー部品番号データシート部品情報
logo
Texas Instruments
LMZ14203EXT TI-LMZ14203EXT Datasheet
4Mb / 25P
[Old version datasheet]   LMZ14203EXT 3A SIMPLE SWITCHER짰 Power Module with 42V Maximum Input Voltage for Military and Rugged Applications
logo
National Semiconductor ...
LMZ14203EXTTZ NSC-LMZ14203EXTTZ Datasheet
748Kb / 10P
   LMZ1420xEXT/ LMZ1200xEXT Evaluation Board
logo
Texas Instruments
LMZ14203EXTTZ TI-LMZ14203EXTTZ Datasheet
4Mb / 25P
[Old version datasheet]   LMZ14203EXT 3A SIMPLE SWITCHER짰 Power Module with 42V Maximum Input Voltage for Military and Rugged Applications
LMZ14203EXTTZE TI-LMZ14203EXTTZE Datasheet
4Mb / 25P
[Old version datasheet]   LMZ14203EXT 3A SIMPLE SWITCHER짰 Power Module with 42V Maximum Input Voltage for Military and Rugged Applications
LMZ14203EXTTZX TI-LMZ14203EXTTZX Datasheet
4Mb / 25P
[Old version datasheet]   LMZ14203EXT 3A SIMPLE SWITCHER짰 Power Module with 42V Maximum Input Voltage for Military and Rugged Applications
More results

同様の説明 - LMZ14203EXT

メーカー部品番号データシート部品情報
logo
Texas Instruments
LMZ10503EXT TI-LMZ10503EXT_15 Datasheet
4Mb / 36P
[Old version datasheet]   3A SIMPLE SWITCHER Power Module With 5.5-V Maximum Input Voltage for Demanding and Rugged Applications
logo
National Semiconductor ...
LMZ10503EXT NSC-LMZ10503EXT Datasheet
1Mb / 22P
   3A SIMPLE SWITCHER짰 Power Module with 5.5V Maximum Input Voltage for Military and Rugged Applications
logo
Texas Instruments
LMZ14202EXT TI-LMZ14202EXT_15 Datasheet
6Mb / 32P
[Old version datasheet]   2A SIMPLE SWITCHER Power Module With 42-V Maximum Input Voltage for Demanding Environments and Rugged Applications
LMZ14201EXT TI-LMZ14201EXT_15 Datasheet
6Mb / 32P
[Old version datasheet]   1A SIMPLE SWITCHER Power Module With 42-V Maximum Input Voltage for Demanding Environments and Rugged Applications
LMZ12003EXT TI1-LMZ12003EXT Datasheet
3Mb / 19P
[Old version datasheet]   3A SIMPLE SWITCHER짰 Power Module with 20V Maximum Input Voltage for Military and Rugged Applications
LMZ12003EXT TI-LMZ12003EXT_15 Datasheet
1Mb / 29P
[Old version datasheet]   3A SIMPLE SWITCHER Power Module With 20-V Maximum Input Voltage for Demanding Environments and Rugged Applications
LMZ14203EXT TI-LMZ14203EXT Datasheet
4Mb / 25P
[Old version datasheet]   LMZ14203EXT 3A SIMPLE SWITCHER짰 Power Module with 42V Maximum Input Voltage for Military and Rugged Applications
LMZ10505EXT TI-LMZ10505EXT_15 Datasheet
4Mb / 36P
[Old version datasheet]   5A SIMPLE SWITCHER Power Module With 5.5-V Maximum Input Voltage for Demanding and Rugged Applications
LMZ10504EXT TI-LMZ10504EXT_15 Datasheet
4Mb / 36P
[Old version datasheet]   4A SIMPLE SWITCHER Power Module With 5.5-V Maximum Input Voltage for Demanding and Rugged Applications
LMZ10505EXT TI1-LMZ10505EXT Datasheet
1Mb / 27P
[Old version datasheet]   5A SIMPLE SWITCHER짰 Power Module with 5.5V Maximum Input Voltage for Military and Rugged Applications
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


データシート ダウンロード

Go To PDF Page


リンク URL




プライバシーポリシー
ALLDATASHEET.JP
ALLDATASHEETはお客様のビジネスに役立ちますか?  [ DONATE ] 

Alldatasheetは   |   広告   |   お問い合わせ   |   プライバシーポリシー   |   リンク交換   |   メーカーリスト
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