Zakładka z wyszukiwarką danych komponentów
  Polish  ▼
ALLDATASHEET.PL

X  

Preview PDF HTML

SC453 Arkusz danych(PDF) 12 Page - Semtech Corporation

Numer części SC453
Szczegółowy opis  Portable, VID Programmed Single Phase Power Supply Controller
PDF  26 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Producent  SEMTECH [Semtech Corporation]
Strona internetowa  http://www.semtech.com
Logo SEMTECH - Semtech Corporation

SC453 Arkusz danych(HTML) 12 Page - Semtech Corporation

Back Button SC453 Datasheet HTML 8Page - Semtech Corporation SC453 Datasheet HTML 9Page - Semtech Corporation SC453 Datasheet HTML 10Page - Semtech Corporation SC453 Datasheet HTML 11Page - Semtech Corporation SC453 Datasheet HTML 12Page - Semtech Corporation SC453 Datasheet HTML 13Page - Semtech Corporation SC453 Datasheet HTML 14Page - Semtech Corporation SC453 Datasheet HTML 15Page - Semtech Corporation SC453 Datasheet HTML 16Page - Semtech Corporation Next Button
Zoom Inzoom in Zoom Outzoom out
 12 / 26 page
background image
12
© 2009 Semtech Corp.
www.semtech.com
POWER MANAGEMENT
SC453
Applications Information (Cont.)
SUPPLY, BIAS, UVLO, POWER GOOD GENERATOR
Supply
The chip is optimized to operate from a 5V ± 5% rail but
also designed to work up to 6V maximum supply voltage.
Under-Voltage Lock-Out Circuit
The Under-Voltage Lock-Out (UVLO) circuitry monitors both
the VCCA and V5 voltage levels. The SC453 is in UVLO
mode while either supply has not ramped above the up-
per threshold or has dropped below the lower threshold.
During UVLO, the external FETs are held off.
Over-Voltage Protection
If the CORE voltage is greater than +14% of the DAC (i.e.,
out of the power good window), the SC453 will latch off
and hold the low-side driver on permanently. Either of the
5V supplies or the EN pin must be cycled to clear the latch.
The latch is disabled during soft-start and VID/Sleep tran-
sitions. For safety, the latch is enabled if the CORE voltage
exceeds 2V even during VID/Sleep transitions.
Thermal Shutdown
The device will be disabled and latched off when the inter-
nal junction temperature reaches approximately 160°C.
Either the power or EN must be recycled to clear the
latch.
Band Gap Reference
A ± 0.85% precision band gap reference acts as the in-
ternal reference voltage standard of the chip, which all
critical biasing voltages and currents are derived from. All
references to V
REF
in the equations to follow will assume
V
REF
= 1.7V.
Precision DAC
This 6-bit digital-to-analog converter (DAC) serves as the
programmable reference source of the core comparator.
Programming is accomplished by logic voltage levels ap-
plied to the DAC inputs. The VID code vs. the DAC output
is shown in the following table. The accuracy of the VID
/DAC is maintained on the same level as the band gap
reference.
VID
V
DAC
VID
V
DAC
54
3
2
1
0
V
5
4
3
2
1
0
V
00000
0
1.708
1
0
0
0
00
1.196
00000
1
1.692
1
0
0
0
0
1
1.180
0000
1
0
1.676
1
0
0
0
1
0
1.164
0000
11
1.660
1
0
0
0
11
1.148
0
0
0
1
0
0
1.644
1
0
0
1
0
0
1.132
0
0
0
1
0
1
1.628
1
0
0
1
0
1
1.116
0
0
0
1
1
0
1.612
1
0
0
1
1
0
1.100
0
0
0
1
1
1
1.596
1
0
0
1
1
1
1.084
0
0
1
0
0
0
1.580
1
0
1
0
0
0
1.068
0
0
1
0
0
1
1.564
1
0
1
0
0
1
1.052
0
0
1
0
1
0
1.548
1
0
1
0
1
0
1.036
0
0
1
0
1
1
1.532
1
0
1
0
1
1
1.020
0
0
1
1
0
0
1.516
1
0
1
1
0
0
1.004
0
0
1
1
0
1
1.500
1
0
1
1
0
1
0.988
00
111
0
1.484
1
0
111
0
0.972
00
1111
1.468
1
0
1111
0.956
0
1
000
0
1.452
1
1
0
0
00
0.940
0
1
0
0
0
1
1.436
1
1
0
0
0
1
0.924
0
1
0
0
1
0
1.420
1
1
0
0
1
0
0.908
0
1
0
0
1
1
1.404
1
1
0
0
1
1
0.892
0
1
0
1
0
0
1.388
1
1
0
1
0
0
0.876
0
1
0
1
0
1
1.372
1
1
0
1
0
1
0.860
0
1
0
1
1
0
1.356
1
1
0
1
1
0
0.844
0
1
0
1
1
1
1.340
1
1
0
1
1
1
0.828
0
1
1
0
0
0
1.324
1
1
1
0
0
0
0.812
0
1
1
0
0
1
1.308
1
1
1
0
0
1
0.796
0
1
1
0
1
0
1.292
1
1
1
0
1
0
0.780
0
1
1
0
1
1
1.276
1
1
1
0
1
1
0.764
0
1
1
1
0
0
1.260
1
1
1
1
0
0
0.748
0
1
1
1
0
1
1.244
1
1
1
1
0
1
0.732
0
1
111
0
1.228
1
1
111
0
0.716
0
1
1111
1.212
1
1
1111
0.700



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


Arkusz danych Pobierz

Go To PDF Page


Link URL



Czy Alldatasheet okazała się pomocna?  [ DONATE ] 

O Alldatasheet   |   Reklama   |   Kontakt   |   Polityka prywatności   |   Link do karty katalogowej    |   Linki   |   Lista producentów
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