Datasheet > NCP4355_12

NCP4355_12

更新时间： 2024-10-02 12:24:59

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	190K
描述
Secondary Side SMPS OFF Mode Controller for Low Standby Power

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NCP4355_12 数据手册

NCP4355

Secondary Side SMPS OFF

Mode Controller for Low

Standby Power

Description

http://onsemi.com

The NCP4355 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 NCP4355 automatically

restarts the primary side controller by ONOFF current that flows

through ONOFF optocoupler. The NCP4355 controls the primary

controller with an “Active ON” signal, meaning that it only drives

optocoupler current during ON mode to minimize consumption during

OFF mode.

SOIC−8

D SUFFIX

CASE 751

XXXXX

ALYWX

During normal power supply operation, the NCP4355 provides

integrated voltage feedback regulation, replacing the need for a shunt

regulator. The A and C versions include a current regulation loop in

addition to voltage regulation.

The NCP4355 includes a LED driver pin (except C version)

implemented with an open drain MOSFET driven by a 1 kHz square

wave with a 12.5% duty cycle for indication purpose.

XXXXX = Specific Device Code

= Assembly Location

= Wafer Lot

= Year

= Work Week

= Pb−Free Package

The NCP4355 is available in SOIC−8 package.

DEVICE MARKING INFORMATION

See general marking information in the device marking

section on page 16 of this data sheet.

DEVICE OPTIONS

NCP4355A

NCP4355B

Yes

NCP4355C

Yes

Adjustable Vmin

Current Regulation

LED driver

Yes

Features

• Operating Input Voltage Range: 3.5 V to 36.0 V

• Supply Current < 100 mA

•

0.5% Reference Voltage Accuracy (T = 25°C)

• Constant Voltage and Constant Current (A and C versions) Control

Loop

• Indication LED PWM Modulated Driver (except NCP4355C)

• These are Pb−free and Halide Free Devices

Typical Applications

• Offline Adapters for Notebooks, Game Stations and Printers

• High Power AC−DC Converters for TVs, Set−Top Boxes, Monitors etc.

Publication Order Number:

October, 2012 − Rev. 0

NCP4355/D

12 3 4 5 6 7...17

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