Datasheet > NCP4354B

NCP4354B

更新时间： 2024-10-02 12:19:03

品牌	Logo	应用领域
安森美 - ONSEMI		开关控制器
页数	文件大小	规格书
17页	321K
描述
Secondary Side SMPS OFF Mode Controller for Low Standby Power

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中文翻译

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NCP4354B 数据手册

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.

http://onsemi.com

MARKING

DIAGRAMS

TSSOP−6

CASE 318G

XXXAYWG

SOIC−8

CASE 751

XXXXX

ALYW G

= Assembly Location

= Wafer Lot

= Year

= Work Week

= 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.

Features

• Operating Input Voltage Range: 2.5 V to 36.0 V

• Supply Current < 100 mA

•

0.5% Reference Voltage Accuracy (T = 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.

DEVICE OPTIONS

NCP4353A

NCP4353B

NCP4354A

NCP4354B

Adjustable

Yes

min

Current

Regulation

Yes

LED Driver

Package

Yes

TSOP−6

SOIC−8

Publication Order Number:

August, 2013 − Rev. 3

NCP4353/D

12 3 4 5 6 7...17

中文翻译

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与NCP4354B相关器件

型号	品牌	获取价格	描述	数据表
NCP4354BDR2G	ONSEMI	获取价格	Secondary Side SMPS OFF Mode Controller for Low Standby Power
NCP4355	ONSEMI	获取价格	Secondary Side SMPS OFF Mode Controller
NCP4355_12	ONSEMI	获取价格	Secondary Side SMPS OFF Mode Controller for Low Standby Power
NCP4355ADR2G	ONSEMI	获取价格	Secondary Side SMPS OFF Mode Controller
NCP4355BDR2G	ONSEMI	获取价格	Secondary Side SMPS OFF Mode Controller
NCP4355CDR2G	ONSEMI	获取价格	Secondary Side SMPS OFF Mode Controller
NCP435FCT2G	ONSEMI	获取价格	受控负载开关，超小型，2.0 A，带自动放电路径
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