Electronic Components Datasheet Search
  English  ▼
ALLDATASHEET.COM

X  

TPS54528DDA Datasheet(PDF) 8 Page - Texas Instruments

Click here to check the latest version.
Part # TPS54528DDA
Description  4.5V to 18V Input, 5-A Synchronous Step-Down Converter with Eco-Mode?
Download  23 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

TPS54528DDA Datasheet(HTML) 8 Page - Texas Instruments

Back Button TPS54528DDA Datasheet HTML 4Page - Texas Instruments TPS54528DDA Datasheet HTML 5Page - Texas Instruments TPS54528DDA Datasheet HTML 6Page - Texas Instruments TPS54528DDA Datasheet HTML 7Page - Texas Instruments TPS54528DDA Datasheet HTML 8Page - Texas Instruments TPS54528DDA Datasheet HTML 9Page - Texas Instruments TPS54528DDA Datasheet HTML 10Page - Texas Instruments TPS54528DDA Datasheet HTML 11Page - Texas Instruments TPS54528DDA Datasheet HTML 12Page - Texas Instruments Next Button
Zoom Inzoom in Zoom Outzoom out
 8 / 23 page
background image
TPS54528
SLVSAY4B – JULY 2011 – REVISED MAY 2012
www.ti.com
Current Protection
The output overcurrent protection (OCP) is implemented using a cycle-by-cycle valley detect control circuit. The
switch current is monitored by measuring the low-side FET switch voltage between the SW pin and GND. This
voltage is proportional to the switch current. To improve accuracy, the voltage sensing is temperature
compensated.
During the on time of the high-side FET switch, the switch current increases at a linear rate determined by VIN,
VOUT, the on-time and the output inductor value. During the on time of the low-side FET switch, this current
decreases linearly. The average value of the switch current is the load current Iout. The TPS54528 constantly
monitors the low-side FET switch voltage, which is proportional to the switch current, during the low-side on-time.
If the measured voltage is above the voltage proportional to the current limit, an internal counter is incremented
per each SW cycle and the converter maintains the low-side switch on until the measured voltage is below the
voltage corresponding to the current limit at which time the switching cycle is terminated and a new switching
cycle begins. In subsequent switching cycles, the on-time is set to a fixed value and the current is monitored in
the same manner. If the over current condition exists for 7 consecutive switching cycles, the internal OCL
threshold is set to a lower level, reducing the available output current. When a switching cycle occurs where the
switch current is not above the lower OCL threshold, the counter is reset and the OCL limit is returned to the
higher value.
There are some important considerations for this type of over-current protection. The peak current is the average
load current plus one half of the peak-to-peak inductor current. The valley current is the average load current
minus one half of the peak-to-peak inductor current. Since the valley current is used to detect the overcurrent
threshold, the load current is higher than the over-current threshold. Also, when the current is being limited, the
output voltage tends to fall as the demanded load current may be higher than the current available from the
converter. When the over current condition is removed, the output voltage will return to the regulated value. This
protection is non-latching.
UVLO Protection
Undervoltage lock out protection (UVLO) monitors the voltage of the VREG5 pin. When the VREG5 voltage is lower
than UVLO threshold voltage, the TPS54528 is shut off. This protection is non-latching.
Thermal Shutdown
TPS54528 monitors the temperature of itself. If the temperature exceeds the threshold value (typically 165°C),
the device is shut off. This is non-latch protection.
8
Copyright © 2011–2012, Texas Instruments Incorporated
Product Folder Link(s) :TPS54528


Similar Part No. - TPS54528DDA

ManufacturerPart #DatasheetDescription
logo
Texas Instruments
TPS54528DDA TI1-TPS54528DDA Datasheet
1Mb / 26P
[Old version datasheet]   4.5-V To 18-V Input, 5-A Synchronous Step-Down Converter With Eco-Mode
TPS54528DDAR TI1-TPS54528DDAR Datasheet
1Mb / 26P
[Old version datasheet]   4.5-V To 18-V Input, 5-A Synchronous Step-Down Converter With Eco-Mode
More results

Similar Description - TPS54528DDA

ManufacturerPart #DatasheetDescription
logo
Texas Instruments
TPS56528 TI-TPS56528 Datasheet
1Mb / 23P
[Old version datasheet]   4.5V to 18V Input, 5-A Synchronous Step-Down Converter with Advanced Eco-mode?
TPS54526 TI1-TPS54526 Datasheet
970Kb / 28P
[Old version datasheet]   4.5V to 18V Input, 5.5-A Synchronous Step-Down Converter with Eco-Mode?
TPS54329E TI1-TPS54329E Datasheet
791Kb / 24P
[Old version datasheet]   4.5V to 18V Input, 3-A Synchronous Step-Down Converter with Eco-Mode?
TPS54229E TI1-TPS54229E Datasheet
816Kb / 24P
[Old version datasheet]   4.5V to 18V Input, 2-A Synchronous Step-Down Converter with Eco-Mode?
TPS56628 TI-TPS56628_15 Datasheet
1,019Kb / 24P
[Old version datasheet]   4.5V to 18V Input, 6-A Synchronous Step-Down Converter with Eco-mode?
TPS54228 TI-TPS54228_15 Datasheet
1Mb / 30P
[Old version datasheet]   4.5V to 18V Input, 2-A Synchronous Step-Down Converter with Eco-mode?
TPS54628 TI-TPS54628 Datasheet
1,006Kb / 22P
[Old version datasheet]   4.5V to 18V Input, 6-A Synchronous Step-Down Converter with Eco-mode?
TPS56628 TI1-TPS56628 Datasheet
1Mb / 23P
[Old version datasheet]   4.5V to 18V Input, 6-A Synchronous Step-Down Converter with Eco-mode
TPS54329E TI-TPS54329E_15 Datasheet
724Kb / 25P
[Old version datasheet]   4.5V to 18V Input, 3-A Synchronous Step-Down Converter with Eco-Mode?
TPS54326 TI1-TPS54326_16 Datasheet
1Mb / 30P
[Old version datasheet]   4.5V to 18V Input, 3-A Synchronous Step-Down Converter with Eco-mode
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


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