Electronic Components Datasheet Search
  Indian  ▼
ALLDATASHEET.IN

X  

Preview PDF HTML

SC4612STRT Datasheet(PDF) 11 Page - Semtech Corporation

Part # SC4612STRT
Description  Wide Input Range High Performance Synchronous Buck Switching Controller
PDF  24 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Manufacturer  SEMTECH [Semtech Corporation]
Direct Link  http://www.semtech.com
Logo SEMTECH - Semtech Corporation

SC4612STRT Datasheet(HTML) 11 Page - Semtech Corporation

Back Button SC4612STRT Datasheet HTML 7Page - Semtech Corporation SC4612STRT Datasheet HTML 8Page - Semtech Corporation SC4612STRT Datasheet HTML 9Page - Semtech Corporation SC4612STRT Datasheet HTML 10Page - Semtech Corporation SC4612STRT Datasheet HTML 11Page - Semtech Corporation SC4612STRT Datasheet HTML 12Page - Semtech Corporation SC4612STRT Datasheet HTML 13Page - Semtech Corporation SC4612STRT Datasheet HTML 14Page - Semtech Corporation SC4612STRT Datasheet HTML 15Page - Semtech Corporation Next Button
Zoom Inzoom in Zoom Outzoom out
 11 / 24 page
background image
11
 2007 Semtech Corp.
www.semtech.com
SC4612
POWER MANAGEMENT
Applications Information (Cont.)
Below are examples of calculating the OCP trip voltages.
Low Side R
DS_ON Current Limit
1. Ra, Rb - Not installed:
2
R
Vphase
mV
100
3
R
mV
100
V
75
.
2
−
=
−
solving for: V
PHASE = -100mV, therefore the circuit will trip @ RDS_ON x ILOAD = 100mV
2. To lower trip voltage - install Rb. For example: Rb = 13k
)
1
R
Rb
(
||
2
R
Vphase
mV
100
3
R
mV
100
V
75
.
2
+
−
=
−
solving for: V
PHASE = -20mV, obviously more sensitive! RDS_ON x ILOAD = 20mV
3. To increase trip voltage - install Ra. For example: Ra = 800k; V
DRIVE = 7.8V typ.
2
R
Vphase
mV
100
1
R
Ra
Vdrive
3
R
mV
100
V
75
.
2
−
=
+
+
−
solving for: V
PHASE = -200mV. Current limit has doubled compared to original conditions.
NOTE! Allow for tempco and R
DS_ON variation of the MOSFET - see “overcurrent protection” information on page 11 in the
datasheet.
PHASE pin
2.75V
OCP
SC4612
R5
10k
R1
2k
Ra
Rb
R4
260k
R3
130k
R2
10k
C2
5pF
C1
2pF
ILIM pin
DRV pin
COMP
+100mV
L
R
load
Vin
Iload@Toff



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


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