Electronic Components Datasheet Search
  English  ▼
ALLDATASHEET.COM

X  

TPS23756 Datasheet(PDF) 8 Page - Texas Instruments

Click here to check the latest version.
Part # TPS23756
Description  High Power/High Efficiency PoE Interface and DC/DC Controller
Download  41 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

TPS23756 Datasheet(HTML) 8 Page - Texas Instruments

Back Button TPS23756 Datasheet HTML 4Page - Texas Instruments TPS23756 Datasheet HTML 5Page - Texas Instruments TPS23756 Datasheet HTML 6Page - Texas Instruments TPS23756 Datasheet HTML 7Page - Texas Instruments TPS23756 Datasheet HTML 8Page - Texas Instruments TPS23756 Datasheet HTML 9Page - Texas Instruments TPS23756 Datasheet HTML 10Page - Texas Instruments TPS23756 Datasheet HTML 11Page - Texas Instruments TPS23756 Datasheet HTML 12Page - Texas Instruments Next Button
Zoom Inzoom in Zoom Outzoom out
 8 / 41 page
background image
PIN DESCRIPTION
APD
(
)
(
)
APD1
APD2
ADPTR_ON
APDEN
APDEN
APD1
APD2
ADPTR_OFF
APDEN
APDH
APD2
R
= R
V
V
V
R
+ R
V
=
V
V
R
´
-
´
-
(1)
BLNK
( )
( )
BLNK
BLNK
R
k
= t
ns
W
(2)
CLS
TPS23754
TPS23754-1
TPS23756
SLVS885B – OCTOBER 2008 – REVISED MAY 2009 ....................................................................................................................................................... www.ti.com
Refer to Figure 1 for component reference designators (RCS for example), and the Electrical Characteristics table
for values denoted by reference (VCSMAX for example). Electrical Characteristic values take precedence over any
numerical values used in the following sections.
APD forces power to come from an external adapter connected from VDD1 to RTN by opening the hotswap
switch, disabling the CLS output (see PPD pin description), and enabling the T2P output. A resistor divider is
recommended on APD when it is connected to an external adapter. The divider provides ESD protection,
leakage discharge for the adapter ORing diode, and input voltage qualification. Voltage qualification assures the
adapter output voltage is high enough that it can support the PD before the PoE current is cut off.
Select the APD divider resistors per Equation 1 where VADPTR-ON is the desired adapter voltage that enables the
APD function as adapter voltage rises.
Place the APD pull-down resistor adjacent to the APD pin.
APD should be tied to ARTN when not used.
Blanking provides an interval between GATE going high and the current-control comparators on CS actively
monitoring the input. This delay allows the normal turn-on current transient (spike) to subside before the
comparators are active, preventing undesired short duty cycles and premature current limiting.
Connect BLNK to ARTN to obtain the internally set blanking period. Connect a resistor from BLNK to ARTN for a
more accurate, programmable blanking period. The relationship between the desired blanking period and the
programming resistor is defined by Equation 2.
Place the resistor adjacent to the BLNK pin when it is used.
A resistor from CLS to VSS programs the classification current per the IEEE standard. The PD power ranges and
corresponding resistor values are listed in Table 1. The power assigned should correspond to the maximum
average power drawn by the PD during operation.
High-power PSEs may perform two classification cycles if Class 4 is presented on the first cycle. The TPS23754
presents the same (resistor programmed) class each cycle per the standard.
Table 1. Class Resistor Selection
POWER AT PD
RESISTOR
CLASS
NOTES
MINIMUM
MAXIMUM
(
Ω)
(W)
(W)
0
0.44
12.95
1270
Minimum may be reduced by pulsed loading. Serves as a catch-all default class.
1
0.44
3.84
243
2
3.84
6.49
137
3
6.49
12.95
90.9
4
12.95
25.5
63.4
Not allowed for IEEE 802.3-2005. Use to indicate a Type 2 PD (high power) per
IEEE 802.3at.
8
Submit Documentation Feedback
Copyright © 2008–2009, Texas Instruments Incorporated
Product Folder Link(s): TPS23754 TPS23754-1 TPS23756


Similar Part No. - TPS23756

ManufacturerPart #DatasheetDescription
logo
Texas Instruments
TPS23756 TI-TPS23756 Datasheet
1Mb / 41P
[Old version datasheet]   High Power/High Efficiency PoE Interface and DC/DC Controller
TPS23756 TI1-TPS23756 Datasheet
2Mb / 45P
[Old version datasheet]   High-Power/High-Efficiency PoE Interface and DC-DC Controller
TPS23756PWP TI-TPS23756PWP Datasheet
1Mb / 41P
[Old version datasheet]   High Power/High Efficiency PoE Interface and DC/DC Controller
TPS23756PWP TI1-TPS23756PWP Datasheet
2Mb / 45P
[Old version datasheet]   High-Power/High-Efficiency PoE Interface and DC-DC Controller
TPS23756PWPR TI-TPS23756PWPR Datasheet
1Mb / 41P
[Old version datasheet]   High Power/High Efficiency PoE Interface and DC/DC Controller
More results

Similar Description - TPS23756

ManufacturerPart #DatasheetDescription
logo
Texas Instruments
TPS23754 TI1-TPS23754_17 Datasheet
2Mb / 45P
[Old version datasheet]   High-Power/High-Efficiency PoE Interface and DC-DC Controller
TPS23754 TI-TPS23754_10 Datasheet
1Mb / 41P
[Old version datasheet]   High Power/High Efficiency PoE Interface and DC/DC Controller
TPS23757 TI-TPS23757 Datasheet
1Mb / 37P
[Old version datasheet]   High Efficiency PoE Interface and DC/DC Controller
TPS23785B TI-TPS23785B Datasheet
1Mb / 47P
[Old version datasheet]   High-Power, High-Efficiency PoE PD and DC-to-DC Controller
TPS23751 TI1-TPS23751_14 Datasheet
1Mb / 47P
[Old version datasheet]   IEEE 802.3at PoE Interface with Wide Range High Efficiency DC-DC Controller
TPS23751 TI1-TPS23751 Datasheet
336Kb / 7P
[Old version datasheet]   IEEE 802.3at PoE Interface with Wide Range High Efficiency DC/DC Controller
logo
ON Semiconductor
NCP1081 ONSEMI-NCP1081 Datasheet
239Kb / 17P
   Integrated High Power PoE-PD Interface & DC-DC Converter Controller
September, 2008 ??Rev. 4
NCP1083 ONSEMI-NCP1083_13 Datasheet
263Kb / 18P
   Integrated High Power PoE-PD Interface & DC-DC Converter Controller
May, 2013 ??Rev. 3
logo
Silicon Standard Corp.
SS6650 SSC-SS6650 Datasheet
496Kb / 6P
   High-Efficiency, Inverting DC/DC Controller
logo
Lowpower Semiconductor ...
LP6240 POWER-LP6240 Datasheet
311Kb / 6P
   High Efficiency Boost DC/DC Controller
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


Datasheet Download

Go To PDF Page


Link URL




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

About Alldatasheet   |   Advertisement   |   Datasheet Upload   |   Contact us   |   Privacy Policy   |   Link Exchange   |   Manufacturer List
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