Datasheet > NCP1288_11

NCP1288_11

更新时间： 2024-09-18 12:24:59

品牌	Logo	应用领域
安森美 - ONSEMI		转换器控制器
页数	文件大小	规格书
39页	276K
描述
Fixed Frequency Current Mode Controller for Flyback Converters

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NCP1288_11 数据手册

NCP1288

Fixed Frequency Current

Mode Controller for Flyback

Converters

The NCP1288 is a new generation of the NCP12xx fixed−frequency

current−mode controllers featuring a high−voltage startup current,

pin−to−pincompatible with the previous generation.

Due to its proprietary Soft−Skip™ mode combined with frequency

foldback, the controller exhibits excellent efficiency in light load

condition while still achieving very low standby power consumption.

This Soft−Skip feature also dramatically reduces the risk of acoustic

noise, which enables the use of inexpensive transformers and

capacitors in the clamping network.

Internal frequency jittering, ramp compensation, and a versatile

latch input make this controller an excellent candidate for converters

where ruggedness and components cost are the key constraints.

In addition, the controller includes a new high voltage circuitry that

combines a startup current source and a brown−out / line OVP detector

able to sense the input voltage either from the rectified ac line or the dc

filtered bulk voltage.

Finally, due to a careful design, the precision of critical parameters

is well controlled over the entire temperature range (−40°C to

+125°C), enabling easier design and increased safety (e.g. $5% for

the peak current limit, $7% for the oscillator).

http://onsemi.com

MARKING

DIAGRAM

88Xff

ALYWX

SOIC−7

CASE 751U

88Xff = Specific Device Code

X = A or B

ff = 65, 00, or 33

= Assembly Location

= Wafer Lot

= Year

= Work Week

= Pb−Free Package

ORDERING INFORMATION

See detailed ordering and shipping information in the package

dimensions section on page 38 of this data sheet.

Features

• Timer−Based Overload Protections with Auto−

Recovery (Option B) or Latched (Option A) Operation

• High−Voltage Current Source with Built−in Brown−out

and Line Overvoltage Protections

• Fixed−Frequency Current−Mode Operation with

Built−in Ramp Compensation

• Frequency Jittering for a Reduced EMI Signature

• Adjustable Overpower Compensation

• Latch−off Input for Severe Fault Conditions, with

Direct Connection of an NTC for Overtemperature

Protection (OTP)

• V Operation up to 28 V

• Increased Precision on Critical Parameters

1.0 A Peak Drive Capability

•

• 4.0 ms Soft−Start

• Internal Thermal Shutdown with Hysteresis

• These Devices are Pb−Free, Halogen Free/BFR Free

and are RoHS Compliant*

Typical Applications

• ac−dc Adapters for Notebooks, LCD, and Printers

• Offline Battery Chargers

• Consumer Electronic Power Supplies

• Auxiliary/Housekeeping Power Supplies

• Protection Against Winding Short−Circuit

• Frequency Foldback transitioning into Soft−Skip for

Improved Performance in Standby

• 65 kHz Oscillator (100 kHz and 133 kHz Versions

Available Upon Request)

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

download the ON Semiconductor Soldering and Mounting Techniques

Reference Manual, SOLDERRM/D.

Publication Order Number:

July, 2011 − Rev. 3

NCP1288/D

12 3 4 5 6 7...39

中文翻译

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与NCP1288_11相关器件

型号	品牌	获取价格	描述	数据表
NCP1288BD65R2G	ONSEMI	获取价格	Fixed Frequency Current Mode Controller for Flyback Converters
NCP1294	ONSEMI	获取价格	Enhanced Voltage Mode PWM Controller
NCP1294ED16	ONSEMI	获取价格	Enhanced Voltage Mode PWM Controller
NCP1294ED16G	ONSEMI	获取价格	Enhanced Voltage Mode PWM Controller
NCP1294EDBR2G	ONSEMI	获取价格	Flyback, Boost, Forward PWM Controller
NCP1294EDR16	ONSEMI	获取价格	Enhanced Voltage Mode PWM Controller
NCP1294EDR16G	ONSEMI	获取价格	Enhanced Voltage Mode PWM Controller
NCP1294EDR2G	ONSEMI	获取价格	Flyback, Boost, Forward PWM Controller
NCP1294EDTB16G	ONSEMI	获取价格	Enhanced Voltage Mode PWM Controller
NCP1294EDTB16R2G	ONSEMI	获取价格	Enhanced Voltage Mode PWM Controller

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