DataSheet26.com

NCP4354 PDF даташит

Спецификация NCP4354 изготовлена ​​​​«ON Semiconductor» и имеет функцию, называемую «Secondary Side SMPS OFF Mode Controller».

Детали детали

Номер произв NCP4354
Описание Secondary Side SMPS OFF Mode Controller
Производители ON Semiconductor
логотип ON Semiconductor логотип 

17 Pages
scroll

No Preview Available !

NCP4354 Даташит, Описание, Даташиты
NCP4353, NCP4354
Secondary Side SMPS OFF
Mode Controller for Low
Standby Power
The NCP4353/4 is a secondary side SMPS controller designed for
use in applications which require extremely low no load power
consumption. The device is capable of detecting “no load” conditions
and entering the power supply into a low consumption OFF mode.
During OFF mode, the primary side controller is turned off and energy
is provided by the output capacitors thus eliminating the power
consumption required to maintain regulation. During OFF mode, the
output voltage relaxes and is allowed to decrease to an adjustable
level. Once more energy is required, the NCP4353/4 automatically
restarts the primary side controller. The NCP4353/4 controls the
primary side controller with an “Active OFF” signal, meaning that it
drives optocoupler current during OFF mode to pull−down the FB pin
of the primary controller.
During normal power supply operation, the NCP4353/4 provides
integrated voltage feedback regulation, replacing the need for a shunt
regulator. The A versions include a current regulation loop in addition
to voltage regulation. Feedback control as well as ON/OFF signal can
be provided with only one optocoupler.
The NCP4354 includes a LED driver pin implemented with an open
drain MOSFET driven by a 1 kHz square wave with a 12.5% duty
cycle when primary side is in regulation for indication purpose.
The NCP4353 is available in TSOP−6 package while the NCP4354
is available in SOIC−8 package.
Features
Operating Input Voltage Range: 2.5 V to 36.0 V
Supply Current < 100 mA
±0.5% Reference Voltage Accuracy (TJ = 25°C)
Constant Voltage and Constant Current (A versions) Control Loop
Indication LED PWM Modulated Driver (NCP4354x)
Designed for use with NCP1246 Fixed Frequency PWM Controller
These Devices are Pb−Free, Halogen Free/BFR Free and are RoHS
Compliant
Typical Applications
Offline Adapters for Notebooks, Game Stations and Printers
High Power AC−DC Converters for TVs, Set−Top Boxes, Monitors, etc.
www.onsemi.com
MARKING
DIAGRAMS
TSSOP−6
CASE 318G
XXXAYWG
G
11
8
1
SOIC−8
CASE 751
8
XXXXX
ALYW G
G
1
A = Assembly Location
L = Wafer Lot
Y = Year
W = Work Week
G = Pb−Free Package
(Note: Microdot may be in either location)
ORDERING INFORMATION
See detailed ordering, marking and shipping information in the
package dimensions section on page 15 of this data sheet.
DEVICE OPTIONS
NCP4353A
Adjustable
Vmin
No
Current
Regulation
Yes
LED Driver
No
Package
TSOP−6
NCP4353B
Yes
No
No
TSOP−6
NCP4354A
Yes
Yes
Yes
SOIC−8
NCP4354B
Yes
No
Yes
SOIC−8
© Semiconductor Components Industries, LLC, 2015
April, 2015 − Rev. 4
1
Publication Order Number:
NCP4353/D









No Preview Available !

NCP4354 Даташит, Описание, Даташиты
NCP4353, NCP4354
VCC
DRIVE
VCC
management
VDD
VREF
IDRIVEOFF
Power
RESET
SW1
Power
RESET
Current
Regulation
Sink only
OTA
VDD
IBIASV
VREFC
SW3
ISNS
QS
QR
Sink only
OTA
Voltage
Regulation
VREF
0.9 x VREF
VSNS
IBIASV
Enabling
VCC
Off Mode
Detection
10%VCC
OFFDET
GND
Power RESET
NCP4353A
VCC
DRIVE
VCC
management
VDD
VREF
IDRIVEOFF
Power
RESET
SW1
Power
RESET
QS
QR
VDD
IBIASV
SW3
Sink only
OTA
Voltage
Regulation
VREF
0.9 x VREF
VSNS
IBIASV
Enabling
VCC
Off Mode
Detection
10%VCC
OFFDET
GND
Power RESET
Min Output
Voltage
VREFM
NCP4353B
Figure 1. Simplified Block Diagrams NCP4353A and NCP4353B
VMIN
www.onsemi.com
2









No Preview Available !

NCP4354 Даташит, Описание, Даташиты
NCP4353, NCP4354
VCC
DRIVE
V CC
management
VDD
VREF
IDRIVEOFF
Power
RESET
Power
RESET
Current
Regulation
Sink only
OTA
VDD
IBIASV
VREFC
SW3
Sink only
OTA
Voltage
Regulation
VREF
0.9 x VREF
ISNS
VSNS
SW1
LED
QS
QR
IBIASV
Enabling
VCC
Off Mode
Detection
10%VCC
OFFDET
GND
VCC
FBC
ON/OFF
SW2 1 kHz, 12% D.C.
Oscillator
Power RESET
NCP4354A
Min Output
Voltage
VREFM
VCC
management
VDD
VREF
IDRIVEOFF
Power
RESET
Power
RESET
VDD
IBIASV
SW3
Sink only
OTA
Voltage
Regulation
VREF
0.9 x VREF
VMIN
VSNS
SW1
LED
QS
QR
IBIASV
Enabling
VCC
Off Mode
Detection
10% VCC
OFFDET
GND
SW2 1 kHz, 12% D.C.
Oscillator
Power RESET
Min Output
Voltage
VREFM
NCP4354B
Figure 2. Simplified Block Diagrams NCP4354A and NCP4354B
VMIN
www.onsemi.com
3










Скачать PDF:

[ NCP4354.PDF Даташит ]

Номер в каталогеОписаниеПроизводители
NCP435(NCP434 / NCP435) 2A Ultra-Small Controlled Load SwitchON Semiconductor
ON Semiconductor
NCP4350Supervisory ICON Semiconductor
ON Semiconductor
NCP4353Secondary Side SMPS OFF Mode ControllerON Semiconductor
ON Semiconductor
NCP4353ASecondary Side SMPS OFF Mode ControllerON Semiconductor
ON Semiconductor

Номер в каталоге Описание Производители
TL431

100 мА, регулируемый прецизионный шунтирующий регулятор

Unisonic Technologies
Unisonic Technologies
IRF840

8 А, 500 В, N-канальный МОП-транзистор

Vishay
Vishay
LM317

Линейный стабилизатор напряжения, 1,5 А

STMicroelectronics
STMicroelectronics

DataSheet26.com    |    2020    |

  Контакты    |    Поиск