Electronic Components Datasheet Search
  English  ▼
ALLDATASHEET.COM

X  

MP2493 Datasheet(PDF) 7 Page - Monolithic Power Systems

Part # MP2493
Description  2A, 36V, Low EMI Step-Down Converter with Programmable Output Current Limit
Download  12 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Manufacturer  MPS [Monolithic Power Systems]
Direct Link  http://www.monolithicpower.com
Logo MPS - Monolithic Power Systems

MP2493 Datasheet(HTML) 7 Page - Monolithic Power Systems

Back Button MP2493 Datasheet HTML 3Page - Monolithic Power Systems MP2493 Datasheet HTML 4Page - Monolithic Power Systems MP2493 Datasheet HTML 5Page - Monolithic Power Systems MP2493 Datasheet HTML 6Page - Monolithic Power Systems MP2493 Datasheet HTML 7Page - Monolithic Power Systems MP2493 Datasheet HTML 8Page - Monolithic Power Systems MP2493 Datasheet HTML 9Page - Monolithic Power Systems MP2493 Datasheet HTML 10Page - Monolithic Power Systems MP2493 Datasheet HTML 11Page - Monolithic Power Systems Next Button
Zoom Inzoom in Zoom Outzoom out
 7 / 12 page
background image
MP2493 – 2A, 36V, LOW EMI STEP-DOWN WITH PROGRAMMABLE OUTPUT CURRENT LIMIT
MP2493 Rev. 0.9
www.MonolithicPower.com
7
4/23/2010
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2010 MPS. All Rights Reserved.
OPERATION
Main Control Loop
The MP2493 is a current mode buck regulator.
That is, the error amplifier (EA) output voltage is
proportional to the peak inductor current.
At the beginning of a cycle, the integrated high
side power switch M1 (Fig.1) is off; the EA
output voltage is higher than the current sense
amplifier output; and the current comparator’s
output is low. The rising edge of the 130kHz
clock signal sets the RS Flip-Flop. Its output
turns on M1 thus connecting the SW pin and
inductor to the input supply.
The increasing inductor current is sensed and
amplified by the Current Sense Amplifier. Ramp
compensation is added to Current Sense
Amplifier output and compared to the Error
Amplifier output by the PWM Comparator.
When the Current Sense Amplifier plus Slope
Compensation signal exceeds the EA output
voltage, the RS Flip-Flop is reset and the
MP2493 reverts to its initial M1 off state.
If the Current Sense Amplifier plus Slope
Compensation signal does not exceed the
COMP voltage, then the falling edge of the CLK
resets the Flip-Flop.
The output of the Error Amplifier integrates the
voltage difference between the feedback and
the 0.8V bandgap reference. The polarity is
such that a FB pin voltage lower than 0.8V
increases the EA output voltage. Since the EA
output voltage is proportional to the peak
inductor current, an increase in its voltage
increases current delivered to the output. An
external Schottky Diode (D1) carries the
inductor current when M1 is off.
Load Current Limiting Loop
The output current information is sensed via the
ISP and ISN pins. The regulation threshold is
set at 100mV. If VSENSE, the difference of VISP
and VISN, is less than 100mV, the output voltage
of the power supply will be set by the FB pin. If
VSENSE reaches 100mV, the current limit loop
will pull down SS and regulate the output at a
constant current determined by the external
sense resistor. The external capacitor on SS
pin is the dominant compensation capacitor for
load current regulation loop. The capacitor has
normal value of 100nF, which will put the
bandwidth of load current regulation loop to be
less than 1 kHz. When VSENSE is higher than
100mV, SS will not drop down to the final
regulation level immediately. It will cause the
load current to be higher than the programmed
level for a short period. A fast comparator is
added to shut down power switch when the
average load current is higher than 120% of the
programmed current limit level.
An inductor DC resistance (DCR) or accurate
sense resistor can be used for load current
sensing.


Similar Part No. - MP2493

ManufacturerPart #DatasheetDescription
logo
Monolithic Power System...
MP2490 MPS-MP2490 Datasheet
338Kb / 13P
   1.5A, 36V, 700KHz Step-Down Converter with Programmable Output Current Limit
MP2490CP MPS-MP2490CP Datasheet
338Kb / 13P
   1.5A, 36V, 700KHz Step-Down Converter with Programmable Output Current Limit
MP2490DQ MPS-MP2490DQ Datasheet
338Kb / 13P
   1.5A, 36V, 700KHz Step-Down Converter with Programmable Output Current Limit
MP2490DS MPS-MP2490DS Datasheet
338Kb / 13P
   1.5A, 36V, 700KHz Step-Down Converter with Programmable Output Current Limit
MP2492 MPS-MP2492 Datasheet
588Kb / 11P
   2A, 55V, 100kHz Step-Down Converter with Programmable Output Current Limit
More results

Similar Description - MP2493

ManufacturerPart #DatasheetDescription
logo
Monolithic Power System...
MP2490 MPS-MP2490 Datasheet
338Kb / 13P
   1.5A, 36V, 700KHz Step-Down Converter with Programmable Output Current Limit
MP2492 MPS-MP2492 Datasheet
588Kb / 11P
   2A, 55V, 100kHz Step-Down Converter with Programmable Output Current Limit
MPQ2490 MPS-MPQ2490 Datasheet
914Kb / 11P
   Industrial Grade, 1.5A, 36V, 700kHz Step-Down Converter with Programmable Output Current Limit
MP2115 MPS-MP2115 Datasheet
461Kb / 11P
   2A Synchronous Step-Down Converter with Programmable Input Current Limit
logo
Maxim Integrated Produc...
MAX16977 MAXIM-MAX16977 Datasheet
2Mb / 17P
   36V, 2A, 2.2MHz Step-Down Converter with Low Operating Current
Rev 0; 5/11
MAX16977 MAXIM-MAX16977_V01 Datasheet
1Mb / 18P
   36V, 2A, 2.2MHz Step-Down Converter with Low Operating Current
2017
logo
Skyworks Solutions Inc.
AAT1138 SKYWORKS-AAT1138 Datasheet
3Mb / 21P
   2A Step-Down Converter with Adjustable Input Current Limit
logo
Monolithic Power System...
EV4420-J-00A MPS-EV4420-J-00A Datasheet
891Kb / 8P
   2A, 36V, Synchronous Step Down Converter
MP2110 MPS-MP2110 Datasheet
619Kb / 15P
   3A Synchronous Step-Down Converter with Programmable Input Current Limit
logo
Maxim Integrated Produc...
MAX16907 MAXIM-MAX16907 Datasheet
2Mb / 17P
   36V, 2.2MHz Step-Down Converter with Low Operating Current
Rev 0; 3/11
More results


Html Pages

1 2 3 4 5 6 7 8 9 10 11 12


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