Datenblatt-Suchmaschine für elektronische Bauteile
  German  ▼
ALLDATASHEETDE.COM

X  

LM25056A Datenblatt(PDF) 11 Page - Texas Instruments

Click here to check the latest version.
Teilenummer LM25056A
Bauteilbeschribung  System Power Measurement IC
Download  39 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Hersteller  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

LM25056A Datenblatt(HTML) 11 Page - Texas Instruments

Back Button LM25056A Datasheet HTML 7Page - Texas Instruments LM25056A Datasheet HTML 8Page - Texas Instruments LM25056A Datasheet HTML 9Page - Texas Instruments LM25056A Datasheet HTML 10Page - Texas Instruments LM25056A Datasheet HTML 11Page - Texas Instruments LM25056A Datasheet HTML 12Page - Texas Instruments LM25056A Datasheet HTML 13Page - Texas Instruments LM25056A Datasheet HTML 14Page - Texas Instruments LM25056A Datasheet HTML 15Page - Texas Instruments Next Button
Zoom Inzoom in Zoom Outzoom out
 11 / 39 page
background image
SDA
SCL
SMBA
VREF
DIODE
ADR0
ADR1
ADR2
VDD
DGND
AGND
VAUX
ENABLE
VIN
VS+
VS-
SMBus
Interface
MMBT3904
POL
REGULATOR
LM25056
RS
+12V
CVDD
VIN
VOUT
CVREF
VDD
CIN
NC
NC
LM25056A
www.ti.com
SNVS785A – JANUARY 2011 – REVISED APRIL 2013
Additionally, VDD can be driven from an external source to maintain telemetry readings for VIN and temperature
if the VIN drops below its operation point. To do this, use an external 5V supply driving the VDD through a
Schottky diode. This allows for telemetry readings down to VIN=0. A large capacitor (100uF) can also be placed
at on the VDD line to momentarily supply current to the device to similarly maintain telemetry readings that would
normally shutdown and reset the device. Note that when using an external VDD drive, ENABLE will not operate
independently. To use this functionality, simply connect the external VDD source to ENABLE and lower this
source to put the LM25056A into low power mode.
Remote Temperature Sensing
The LM25056A is designed to measure temperature remotely using an MMBT3904 NPN transistor. The base
and collector of the MMBT3904 should be connected to the DIODE pin and the emitter of the MMBT3904
connected to AGND. Place the MMBT3904 near the device whose temperature is to be monitored. In noisy
environments with large currents or switching noise, it is especially important to bring this connection back to
AGND and not just to the nearest ground plane. If the temperature of a pass MOSFET is to be measured, the
MMBT3904 should be placed as close to device as the layout allows. The temperature is measured by means of
a change in an external diode voltage in response to a step in current supplied by DIODE. DIODE sources 9.2
µA but pulses 240 µA once every millisecond in order to measure the diode temperature. Care must be taken in
the PCB layout to keep the parasitic resistance between DIODE and the MMBT3904 low so as not to degrade
the measurement. Additionally, a small 100 pF bypass capacitor can be placed in parallel with the MMBT3904 to
reduce the effects of noise. The temperature can be read using the READ_TEMPERATURE_1 PMBus command
(8Dh). The default warning limit of the LM25056A will cause SMBA to be pulled low if the measured temperature
code exceeds 07D0h. The PMBus will also indicate an over temperature fault if the measured temperature code
exceeds 0960h. These thresholds can be reprogrammed via the PMBus interface using the OT_WARN_LIMIT
(51h) and OT_FAULT_LIMIT (4Fh) commands. If the temperature measurement and protection capability of the
LM25056A is not used the DIODE pin should be grounded.
Application Section
Figure 16. Typical Application Circuit
DESIGN-IN PROCEDURE
(Refer to Figure 16 for Typical Application Circuit) Shown here is the step-by-step procedure for hardware design
of the LM25056A. This procedure refers to section numbers that provide detailed information on the following
design steps. The recommended design-in procedure is as follows:
Copyright © 2011–2013, Texas Instruments Incorporated
Submit Documentation Feedback
11
Product Folder Links: LM25056A


Ähnliche Teilenummer - LM25056A

HerstellerTeilenummerDatenblattBauteilbeschribung
logo
Texas Instruments
LM25056A TI1-LM25056A Datasheet
624Kb / 33P
[Old version datasheet]   System Power Measurement IC with PMBus?
LM25056APSQ TI1-LM25056APSQ Datasheet
624Kb / 33P
[Old version datasheet]   System Power Measurement IC with PMBus?
LM25056APSQE TI1-LM25056APSQE Datasheet
624Kb / 33P
[Old version datasheet]   System Power Measurement IC with PMBus?
LM25056APSQX TI1-LM25056APSQX Datasheet
624Kb / 33P
[Old version datasheet]   System Power Measurement IC with PMBus?
More results

Ähnliche Beschreibung - LM25056A

HerstellerTeilenummerDatenblattBauteilbeschribung
logo
Texas Instruments
LM25056 TI1-LM25056_16 Datasheet
934Kb / 39P
[Old version datasheet]   System Power Measurement IC
LM25056A TI1-LM25056A Datasheet
624Kb / 33P
[Old version datasheet]   System Power Measurement IC with PMBus?
LM25056 TI1-LM25056 Datasheet
623Kb / 33P
[Old version datasheet]   System Power Measurement IC with PMBus?
logo
Maxim Integrated Produc...
78M6631 MAXIM-78M6631 Datasheet
600Kb / 30P
   3-Phase Power-Measurement IC
Rev 1; 1/12
logo
Silergy Corp.
78M6631 SILERGY-78M6631 Datasheet
567Kb / 30P
   3-Phase Power-Measurement IC
logo
Maxim Integrated Produc...
78M6631_1204 MAXIM-78M6631_1204 Datasheet
475Kb / 30P
   3-Phase Power-Measurement IC
Rev 2; 4/12
logo
Toshiba Semiconductor
TC7739FTG TOSHIBA-TC7739FTG Datasheet
906Kb / 39P
   System power IC
2016-09-29
TC7738WBG TOSHIBA-TC7738WBG Datasheet
1Mb / 48P
   System Power IC
2016-11-17
logo
Agilent(Hewlett-Packard...
N4371A HP-N4371A Datasheet
256Kb / 4P
   RIN Measurement System
logo
Silergy Corp.
78M6613 SILERGY-78M6613 Datasheet
813Kb / 33P
   Single-Phase AC Power Measurement IC
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


Datenblatt Download

Go To PDF Page


Link URL




Privatsphäre und Datenschutz
ALLDATASHEETDE.COM
War ALLDATASHEET hilfreich?  [ DONATE ] 

Über Alldatasheet   |   Werbung   |   Kontakt   |   Privatsphäre und Datenschutz   |   Linktausch   |   Hersteller
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