Electronic Components Datasheet Search
  English  ▼

X  

Preview PDF HTML

LM5155 Datasheet(PDF) 20 Page - Texas Instruments

Click here to check the latest version.
Part # LM5155
Description  LM5155x-Q1 2.2-MHz Wide Input Nonsynchronous Boost, SEPIC, Flyback Controller
PDF  51 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

LM5155 Datasheet(HTML) 20 Page - Texas Instruments

Back Button LM5155 Datasheet HTML 16Page - Texas Instruments LM5155 Datasheet HTML 17Page - Texas Instruments LM5155 Datasheet HTML 18Page - Texas Instruments LM5155 Datasheet HTML 19Page - Texas Instruments LM5155 Datasheet HTML 20Page - Texas Instruments LM5155 Datasheet HTML 21Page - Texas Instruments LM5155 Datasheet HTML 22Page - Texas Instruments LM5155 Datasheet HTML 23Page - Texas Instruments LM5155 Datasheet HTML 24Page - Texas Instruments Next Button
Zoom Inzoom in Zoom Outzoom out
 20 / 51 page
background image
RS
ISLOPE
CS
+
±
+
±
VCS1
VCSTH
VCS2
PWM
Comparator
Current Limit
Comparator
COMP
GCOMP
RF (optional)
CF (optional)
RSL(optional)
=0.142
VSLOPE + offset
RCOMP
CCOMP
CHF
(optional)
Figure 9-17. Current Sensing and Slope Compensation
Sensed Inductor
Current (RS × ILM)
Fixed Slope
Compensation
Ramp
VSLOPE × D + 0.17V
Programmable Slope
Compensation Ramp
ISLOPE × RSL × D
V
Figure 9-18. Slope Compensation Ramp (a) at PWM
Comparator Input
Sensed Inductor
Current (RS × ILM)
Programmable Slope
Compensation Ramp
V
ISLOPE × RSL × D
Figure 9-19. Slope Compensation Ramp (b) at
Current Limit Comparator Input
Use Equation 6 to calculate the value of the peak slope current (ISLOPE) and use Equation 7 to calculate the
value of the peak slope voltage (VSLOPE).
RT
SLOPE
SYNC
f
I
30 A
f
P u
(6)
RT
SLOPE
SYNC
f
V
40mV
f
u
(7)
where
• fSYNC = fRT if clock synchronization is not used.
According to peak current mode control theory, the slope of the compensation ramp must be greater than half of
the sensed inductor current falling slope to prevent subharmonic oscillation at high duty cycle. Therefore, the
minimum amount of slope compensation in boost topology should satisfy the following inequality:
LOAD
F
SUPPLY
S
SW
M
V
V
V
0.5
R
Margin
40mV f
L
u
u
u
u
(8)
LM5155-Q1, LM51551-Q1
SNVSAY4E – AUGUST 2018 – REVISED JANUARY 2021
www.ti.com
20
Submit Document Feedback
Copyright © 2021 Texas Instruments Incorporated
Product Folder Links: LM5155-Q1 LM51551-Q1



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


Datasheet Download

Go To PDF Page


Link URL



Does ALLDATASHEET help your business so far?  [ DONATE ] 

About Alldatasheet   |   Advertisement   |   Contact us   |   Privacy Policy   |   Link to Datasheet    |   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