Motore di ricerca datesheet componenti elettronici
  Italian  ▼
ALLDATASHEETIT.COM

X  

L6995S Scheda tecnica(PDF) 10 Page - STMicroelectronics

Il numero della parte L6995S
Spiegazioni elettronici  LOSSLESS CURRENT LIMIT
Download  26 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Produttore elettronici  STMICROELECTRONICS [STMicroelectronics]
Homepage  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L6995S Scheda tecnica(HTML) 10 Page - STMicroelectronics

Back Button L6995S Datasheet HTML 6Page - STMicroelectronics L6995S Datasheet HTML 7Page - STMicroelectronics L6995S Datasheet HTML 8Page - STMicroelectronics L6995S Datasheet HTML 9Page - STMicroelectronics L6995S Datasheet HTML 10Page - STMicroelectronics L6995S Datasheet HTML 11Page - STMicroelectronics L6995S Datasheet HTML 12Page - STMicroelectronics L6995S Datasheet HTML 13Page - STMicroelectronics L6995S Datasheet HTML 14Page - STMicroelectronics Next Button
Zoom Inzoom in Zoom Outzoom out
 10 / 26 page
background image
Obsolete
Product(s)
- Obsolete
Product(s)
L6995S
10/26
be supposed linear function of the time.
Eq 8
so the output voltage is given by:
Eq 9
calling Vout as the Vout final value, the output charging time can be estimated as:
Eq 10
the minimum CSS value is given imposing this condition:
Eq 11
Tout =Tuvp
4.5 Current limit
The current limit comparator senses the inductor current through the low side MOSFET RDSON drop and com-
pares this value with the ILIM pin voltage value. While the current is above the current limit value, the control
inhibits the one-shot start.
To properly set the current limit threshold, it should be noted that this is a valley current limit. Average current
depends on the inductor value, VIN VOUT and switching frequency.
The average output current in current limit is given by:
Eq 12
Thus, to set the current threshold, choose RILIM according to the following equation:
Eq 13
In current limit the system keeps the current constant until the output voltage meets the undervolatge threshold.
The system is capable to sink current, but it has not a negative current limit.
The system accuracy is function of the exactness of the resistance connected to ILIM pin and the low side MOS-
FET RDSON accuracy. Moreover the voltage on ILIM pin must range between 10mV and 2V to ensure the sys-
tem linearity.
Figure 9. Current limit schematic
I
L t,CSS
()
R
ilim /Rdson
K
C
I
SS t
⋅⋅
()
V
SS
C
SS
()
-------------------------------------------------------------------
=
V
out t,CSS
()
Qt,C
SS
()
C
out
-------------------------
R
ilim/Rdson
K
C
I
SS
t
2
⋅⋅
()
C
out
V
SS
C
SS 2
⋅⋅
()
----------------------------------------------------------------------
==
I
out CSS
()
V
out
C
out
V
SS
C
SS
2
⋅⋅
⋅⋅
()
R
ilim /Rdson
K
C
I
SS
⋅⋅
()
----------------------------------------------------------------------------
0.5
=
I
OUT
CL
I
max valley
I
2
-----
+
=
I
max valley
R
ILim
Rds
on
-----------------
I
Lim
5.2
----------
=
Positive current limit
R
ILIM
5µA
Current
Comparator
To
logic
PGN
D
PHASE
To inductor
LS


Codice articolo simile - L6995S

Produttore elettroniciIl numero della parteScheda tecnicaSpiegazioni elettronici
logo
STMicroelectronics
L6995 STMICROELECTRONICS-L6995 Datasheet
336Kb / 25P
   STEP DOWN CONTROLLER FOR HIGH DIFFERENTIAL INPUT-OUTPUT CONVERSION
L6995D STMICROELECTRONICS-L6995D Datasheet
336Kb / 25P
   STEP DOWN CONTROLLER FOR HIGH DIFFERENTIAL INPUT-OUTPUT CONVERSION
L6995DTR STMICROELECTRONICS-L6995DTR Datasheet
336Kb / 25P
   STEP DOWN CONTROLLER FOR HIGH DIFFERENTIAL INPUT-OUTPUT CONVERSION
More results

Descrizione simile - L6995S

Produttore elettroniciIl numero della parteScheda tecnicaSpiegazioni elettronici
logo
Maxim Integrated Produc...
MAX8537EVKIT MAXIM-MAX8537EVKIT Datasheet
228Kb / 11P
   Lossless Adjustable Hiccup Current Limit
Rev 0; 7/04
logo
Richtek Technology Corp...
RT2530Q RICHTEK-RT2530Q Datasheet
141Kb / 10P
   Current Limit
logo
Advanced Monolithic Sys...
AMS3131 ADMOS-AMS3131 Datasheet
319Kb / 9P
   Current Limit protection
AMS3132 ADMOS-AMS3132 Datasheet
439Kb / 10P
   Current Limit protection
logo
STMicroelectronics
STEVAL-ISA052V2 STMICROELECTRONICS-STEVAL-ISA052V2 Datasheet
137Kb / 4P
   Negative current limit
May 2008 Rev 1
logo
M.S. Kennedy Corporatio...
MSK146 MSK-MSK146_15 Datasheet
246Kb / 8P
   Programmable Current Limit
logo
STMicroelectronics
STEVAL-ISA052V1 STMICROELECTRONICS-STEVAL-ISA052V1 Datasheet
123Kb / 4P
   Negative current limit
November 2010 Rev 1
logo
Unisonic Technologies
LR1112G-XX-AE5-R UTC-LR1112G-XX-AE5-R Datasheet
177Kb / 6P
   Current limit protection
logo
Texas Instruments
PT5071-12V TI1-PT5071-12V Datasheet
150Kb / 4P
[Old version datasheet]   Output Current Limit
logo
Solid State Optronic
AD4C111-L SSOUSA-AD4C111-L_15 Datasheet
221Kb / 5P
   Current Limit Protection
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


Scheda tecnica Scarica

Go To PDF Page


Link URL




Privacy Policy
ALLDATASHEETIT.COM
Lei ha avuto il aiuto da alldatasheet?  [ DONATE ] 

Di alldatasheet   |   Richest di pubblicita   |   contatti   |   Privacy Policy   |   scambio Link   |   Ricerca produttore
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