Motor de Búsqueda de Datasheet de Componentes Electrónicos
  Spanish  ▼
ALLDATASHEET.ES

X  

1N5818 Datasheet(PDF) 7 Page - ON Semiconductor

No. de pieza 1N5818
Descripción Electrónicos  1.5 A, 170 kHz, Buck Regulator with Synchronization Capability
Download  13 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Fabricante Electrónico  ONSEMI [ON Semiconductor]
Página de inicio  http://www.onsemi.com
Logo ONSEMI - ON Semiconductor

1N5818 Datasheet(HTML) 7 Page - ON Semiconductor

Back Button 1N5818 Datasheet HTML 3Page - ON Semiconductor 1N5818 Datasheet HTML 4Page - ON Semiconductor 1N5818 Datasheet HTML 5Page - ON Semiconductor 1N5818 Datasheet HTML 6Page - ON Semiconductor 1N5818 Datasheet HTML 7Page - ON Semiconductor 1N5818 Datasheet HTML 8Page - ON Semiconductor 1N5818 Datasheet HTML 9Page - ON Semiconductor 1N5818 Datasheet HTML 10Page - ON Semiconductor 1N5818 Datasheet HTML 11Page - ON Semiconductor Next Button
Zoom Inzoom in Zoom Outzoom out
 7 / 13 page
background image
NCP1546
http://onsemi.com
7
duty cycle of the sync pulses can vary from 10% to 90%. The
frequency foldback feature is disabled during the sync
mode.
Figure 4. A NCP1546 Buck Regulator is Synchronized
to an External 350 kHz Pulse Signal
Power Switch and Current Limit
The collector of the built−in NPN power switch is
connected to the VIN pin, and the emitter to the VSW pin.
When the switch turns on, the VSW voltage is equal to the
VIN minus switch Saturation Voltage. In the buck regulator,
the VSW voltage swings to one diode drop below ground
when the power switch turns off, and the inductor current is
commutated to the catch diode. Due to the presence of high
pulsed current, the traces connecting the VSW pin, inductor
and diode should be kept as short as possible to minimize the
noise and radiation. For the same reason, the input capacitor
should be placed close to the VIN pin and the anode of the
diode.
The saturation voltage of the power switch is dependent
on the switching current, as shown in Figure 5.
Figure 5. The Saturation Voltage of the Power Switch
Increases with the Conducting Current
0
0.5
1.0
1.5
SWITCHING CURRENT (A)
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
The NCP1546 contains pulse−by−pulse current limiting
to protect the power switch and external components. When
the peak of the switching current reaches the Current Limit,
the power switch turns off after the Current Limit Delay. The
switch will not turn on until the next switching cycle. The
current limit threshold is independent of switching duty
cycle. The maximum load current, given by the following
formula under continuous conduction mode, is less than the
Current Limit due to the ripple current.
IO(MAX) + ILIM *
VO(VIN * VO)
2(L)(VIN)(fs)
where:
fS = switching frequency,
ILIM = current limit threshold,
VO = output voltage,
VIN = input voltage,
L = inductor value.
When the regulator runs under current limit, the
subharmonic
oscillation
may
cause
low
frequency
oscillation, as shown in Figure 6. Similar to current mode
control, this oscillation occurs at the duty cycle greater than
50% and can be alleviated by using a larger inductor value.
The current limit threshold is reduced to Foldback Current
when the FB pin falls below Foldback Threshold. This
feature protects the IC and external components under the
power up or over−load conditions.
Figure 6. The Regulator in Current Limit


Número de pieza similar - 1N5818

Fabricante ElectrónicoNo. de piezaDatasheetDescripción Electrónicos
logo
Motorola, Inc
1N5818 MOTOROLA-1N5818 Datasheet
96Kb / 6P
   SCHOTTKY BARRIER RECTIFIERS 1 AMPERE 20, 30 and 40 VOLTS
logo
Mospec Semiconductor
1N5818 MOSPEC-1N5818 Datasheet
213Kb / 2P
   Schottky Barrier Rectifiers
logo
Stanson Technology
1N5818 STANSON-1N5818 Datasheet
67Kb / 1P
   SCHOTTKY BARRIER RECTIFIERS
logo
AiT Semiconductor Inc.
1N5818 AITSEMI-1N5818 Datasheet
563Kb / 5P
   SCHOTTKY DIODES SURFACE MOUNT SCHOTTKY BARRIER RECTIFIERS
REV1.0
logo
Central Semiconductor C...
1N5818 CENTRAL-1N5818 Datasheet
58Kb / 1P
   Schottky Barrier Rectifier
More results

Descripción similar - 1N5818

Fabricante ElectrónicoNo. de piezaDatasheetDescripción Electrónicos
logo
ON Semiconductor
NCV8842 ONSEMI-NCV8842_11 Datasheet
377Kb / 16P
   1.5 A, 170 kHz, Buck Regulator with Synchronization Capability
July, 2011 ??Rev. 10
NCV8842 ONSEMI-NCV8842 Datasheet
180Kb / 15P
   1.5 A, 170 kHz, Buck Regulator with Synchronization Capability
October, 2006 ??Rev. 1
NCV8843 ONSEMI-NCV8843 Datasheet
187Kb / 15P
   1.5 A, 340 kHz, Buck Regulator with Synchronization Capability
October, 2006 ??Rev. 1
NCV8843 ONSEMI-NCV8843_10 Datasheet
385Kb / 16P
   1.5 A, 340 kHz, Buck Regulator with Synchronization Capability
May, 2010 ??Rev. 10
NCP1547 ONSEMI-NCP1547 Datasheet
157Kb / 13P
   1.5 A, 340 kHz, Buck Regulator with Synchronization Capability
March, 2007 ??Rev. 0
NCP1547 ONSEMI-NCP1547_11 Datasheet
242Kb / 15P
   1.5 A, 340 kHz, Buck Regulator with Synchronization Capability
July, 2011 ??Rev. 5
NCV51411 ONSEMI-NCV51411 Datasheet
182Kb / 16P
   1.5 A, 260 kHz, Low Voltage Buck Regulator with Synchronization Capability
May, 2010 ??Rev. 15
NCV51411 ONSEMI-NCV51411 Datasheet
224Kb / 16P
   1.5 A, 260 kHz, Low Voltage Buck Regulator with Synchronization Capability
May, 2010 ??Rev. 15
CS51411 ONSEMI-CS51411_07 Datasheet
252Kb / 20P
   1.5 A, 260 kHz and 520 kHz, Low Voltage Buck Regulators with External Bias or Synchronization Capability
February, 2007 ??Rev. 17
CS51411-D ONSEMI-CS51411-D Datasheet
706Kb / 20P
   1.5 A, 260 kHz and 520 kHz, Low Voltage Buck Regulators with External Bias or Synchronization Capability
September, 2007 - Rev. 18
More results


Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13


Datasheet Descarga

Go To PDF Page


Enlace URL




Política de Privacidad
ALLDATASHEET.ES
¿ALLDATASHEET es útil para Ud.?  [ DONATE ] 

Todo acerca de Alldatasheet   |   Publicidad   |   Contáctenos   |   Política de Privacidad   |   Intercambio de Enlaces   |   Lista de Fabricantes
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