Datasheet > NCP1239

NCP1239

更新时间： 2024-11-30 04:37:59

品牌	Logo	应用领域
安森美 - ONSEMI		控制器
页数	文件大小	规格书
38页	1133K
描述
Low−Standby High Performance PWM Controller

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中文翻译

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数据手册

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NCP1239 数据手册

NCP1239

Low−Standby High

Performance PWM Controller

Housed in SO−16 the NCP1239 represents a major leap toward

ultra−compact Switch Mode Power Supplies specifically tailored for

medium to high power off−line applications, e.g. notebook adapters.

The NCP1239 offers everything needed to build a rugged and efficient

power supply, including a dedicated event management to drive a

Power Factor Correction (PFC) front−end circuitry. The circuit

disables the front−end PFC stage while still in fault or standby

conditions by interrupting the PFC controller powering for improved

no−load consumption figures. As soon as normal operating mode

recovers, the NCP1239 feeds back the PFC that wakes−up.

http://onsemi.com

SO−16

FD or VD SUFFIX

CASE 751B

When power demand is low, the IC automatically enters the

so−called skip−cycle mode and provides excellent efficiency at light

loads. Because this occurs at a user adjustable low peak current, no

acoustic noise takes place.

MARKING DIAGRAM

Features

NCP1239xDG

AWLYWW

• Current−Mode Operation with Internal Ramp Compensation

• Internal High−Voltage Current Source for loss−less Startup

• Adjustable Skip−Cycle Capability

NCP1239xD = Device Code

• Selectable Soft−Start Period

= F or V

= Assembly Location

= Wafer Lot

= Year

= Work Week

= Pb−Free Package

• Internal Frequency Dithering for Improved EMI Signature

• Go−to−Standby Signal for PFC Front−Stage

• Large V Operation from 12.2 V to 36 V

• 500 mV Overcurrent Limit

• 500 mA/−800 mA Peak Current Capability

• 5 V/10 mA Pinned−out Reference Voltage

• Adjustable Switching Frequency up to 250 kHz.

PIN CONNECTIONS

GTS

REF5V

Fault Detect

• Overload Protection Independent of the Auxiliary V

• Adjustable Over Power Compensation (NCP1239F)

• Programmable Maximum Duty Cycle (NCP1239V)

• Pb−Free Packages are Available*

Brown−out

SS/Timer

Drv

GND

Skip Adjust

Over Power

Limit

Typical Applications

• High Power AC/DC Adapters for Notebooks etc.

• Offline Battery Chargers

NCP1239F

• Telecom and PC Power Supplies

GTS

REF5V

Fault Detect

• Flyback Applications (NCP1239F) and Forward Applications

(NCP1239V)

Brown−out

SS/Timer

Drv

GND

Skip Adjust

Max Duty−

Cycle

NCP1239V

*For additional information on our Pb−Free strategy and soldering details, please

download the ON Semiconductor Soldering and Mounting Techniques

Reference Manual, SOLDERRM/D.

ORDERING INFORMATION

See detailed ordering and shipping information in the package

dimensions section on page 5 of this data sheet.

Semiconductor Components Industries, LLC, 2005

Publication Order Number

October, 2005 − Rev. 5

NCP1239/D

12 3 4 5 6 7...38

中文翻译

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