Electronic Components Datasheet Search
  English  ▼

Delete All
ON OFF
ALLDATASHEET.COM

X  

Preview PDF Download HTML

TPS53851 Datasheet(PDF) 24 Page - Texas Instruments

Part No. TPS53851
Description  DUAL OR 2-PHASE, STACKABLE CONTROLLER
Download  64 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

TPS53851 Datasheet(HTML) 24 Page - Texas Instruments

Back Button TPS53851 Datasheet HTML 20Page - Texas Instruments TPS53851 Datasheet HTML 21Page - Texas Instruments TPS53851 Datasheet HTML 22Page - Texas Instruments TPS53851 Datasheet HTML 23Page - Texas Instruments TPS53851 Datasheet HTML 24Page - Texas Instruments TPS53851 Datasheet HTML 25Page - Texas Instruments TPS53851 Datasheet HTML 26Page - Texas Instruments TPS53851 Datasheet HTML 27Page - Texas Instruments TPS53851 Datasheet HTML 28Page - Texas Instruments Next Button
Zoom Inzoom in Zoom Outzoom out
 24 / 64 page
background image
+
+
+
+
CSRTn
CSn
+
_
PWM
+
+
0.5 V
0 V
ERROR AMP
COMP
CSgain = 12.5
V
SHR
, 1.8 V
I
LIM
20 mA
OVERCURRENT
R1
R2
V
OUT
R
SNS
U1
U2
U3
U4
U5
U6
U7
RAMP
V
C
+
_
V
e
V
OUT
I
OUT
5
.
12
)
R
I
(
V
COMP
SNS
PEAK
e
´
´
+
=
SHR
IN
OUT
e
V
V
V
RAMP
V
+
´
=
5
.
12
)
R
I
(
V
V
V
RAMP
COMP
SNS
PEAK
SHR
IN
OUT
´
´
+
+
´
=
TPS53851
SLUS985 – DECEMBER 2009
www.ti.com
5.23
CURRENT SENSE
The current sensing and overcurrent detection architecture is shown in Figure 5-8.
Figure 5-8. Output Current Sensing and Overcurrent Detection
The output current, IOUT, flows through RSNS and develops a voltage, VC across it, representative of the
output current. The voltage, VC, could also be derived from an R-C network in parallel with the output
inductor. This voltage is amplified with a gain of 12.5 and then subtracted from the Error Amp output,
COMP, to generate the Ve voltage. The Ve signal is compared to the slope-compensation RAMP signal to
generate the PWM for the modulator. As the output current is increased, the amplified VC causes the Ve
signal to decrease. In order to maintain the proper duty cycle (PWM), the COMP signal must increase.
Therefore the magnitude of the COMP signal contains the output current information:
(7)
This is integral in the overcurrent detection as can be seen at comparator U7, comparing the ILIM voltage
with COMP. In order to have the proper duty cycle at PWM, Ve is:
(8)
Combining equations:
(9)
This equation for COMP shows the reason for resistors R1 and R2 being tied to VSHR and VOUT
respectively.
24
APPLICATION INFORMATION
Copyright © 2009, Texas Instruments Incorporated
Submit Documentation Feedback
Product Folder Link(s): TPS53851


Similar Part No. - TPS53851

ManufacturerPart No.DatasheetDescription
Texas Instruments
Texas Instruments
TPS53819A TI-TPS53819A Datasheet
971Kb / 43P
[Old version datasheet]   High-Performance, Eco-mode, Single Synchronous Step-Down Controller with PMBus
TPS53819ARGTR TI-TPS53819ARGTR Datasheet
971Kb / 43P
[Old version datasheet]   High-Performance, Eco-mode, Single Synchronous Step-Down Controller with PMBus
TPS53819ARGTT TI-TPS53819ARGTT Datasheet
971Kb / 43P
[Old version datasheet]   High-Performance, Eco-mode, Single Synchronous Step-Down Controller with PMBus
TPS53819A TI-TPS53819A_15 Datasheet
1Mb / 52P
[Old version datasheet]   TPS53819A High-Performance, Eco-mode?? Single Synchronous Step-Down Controller with PMBus?
TPS53820 TI1-TPS53820 Datasheet
168Kb / 10P
[Old version datasheet]   Integrated Step-Down Converter with SVID Interface for Intel짰 CPU Power Supply
More results

Similar Description - TPS53851

ManufacturerPart No.DatasheetDescription
Texas Instruments
Texas Instruments
TPS40140 TI-TPS40140 Datasheet
1Mb / 65P
[Old version datasheet]   DUAL OR 2-PHASE, STACKABLE CONTROLLER
TPS40140 TI1-TPS40140_16 Datasheet
2Mb / 68P
[Old version datasheet]   Dual or 2-Phase, Stackable Controller
TPS40140 TI-TPS40140_15 Datasheet
2Mb / 71P
[Old version datasheet]   TPS40140 Dual or 2-Phase, Stackable Controller
TPS40180 TI-TPS40180 Datasheet
1Mb / 52P
[Old version datasheet]   SINGLE PHASE STACKABLE CONTROLLER
ON Semiconductor
ON Semiconductor
NCP81243 ONSEMI-NCP81243 Datasheet
338Kb / 26P
   Dual Output 3 & 2 Phase Controller
February, 2016 ??Rev. 0
NCP81243 ONSEMI-NCP81243_17 Datasheet
341Kb / 26P
   Dual Output 3 & 2 Phase Controller
June, 2017 ??Rev. 2
Microchip Technology
Microchip Technology
MIC21LV32 MICROCHIP-MIC21LV32 Datasheet
1Mb / 50P
   36V Dual Phase, Advanced COT Buck Controller Stackable for Multiphase Operation
02/28/20
Texas Instruments
Texas Instruments
TPS40322 TI1-TPS40322_16 Datasheet
1Mb / 47P
[Old version datasheet]   Dual Output or Two-Phase Synchronous Buck Controller
TPS40322 TI1-TPS40322 Datasheet
1,023Kb / 40P
[Old version datasheet]   Dual Output or Two-Phase Synchronous Buck Controller
TPS40322 TI-TPS40322_15 Datasheet
1Mb / 42P
[Old version datasheet]   Dual Output or Two-Phase Synchronous Buck 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  42  43  44  45  46  47  48  49  50  51  52  53  54  55  56  57  58  59  60  61  62  63  64 


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