Datasheet > NCP1351DDR2G

NCP1351DDR2G

更新时间： 2024-09-20 01:18:43

品牌	Logo	应用领域
安森美 - ONSEMI		开关光电二极管
页数	文件大小	规格书
27页	532K
描述
Variable Off Time PWM Controller

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技术参数
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NCP1351DDR2G 技术参数

是否无铅：	不含铅	是否Rohs认证：	符合
生命周期：	Obsolete	零件包装代码：	SOIC
包装说明：	LEAD FREE, SOIC-8	针数：	8
Reach Compliance Code：	compliant	ECCN代码：	EAR99
HTS代码：	8542.39.00.01	Factory Lead Time：	1 week
风险等级：	5.66	Is Samacsys：	N
模拟集成电路 - 其他类型：	SWITCHING CONTROLLER	控制模式：	CURRENT-MODE
控制技术：	PULSE WIDTH MODULATION	最大输入电压：	28 V
最小输入电压：	9.5 V	标称输入电压：	12 V
JESD-30 代码：	R-PDSO-G8	JESD-609代码：	e3
长度：	4.9 mm	湿度敏感等级：	1
功能数量：	1	端子数量：	8
最大输出电流：	0.4 A	封装主体材料：	PLASTIC/EPOXY
封装代码：	SOP	封装等效代码：	SOP8,.25
封装形状：	RECTANGULAR	封装形式：	SMALL OUTLINE
峰值回流温度（摄氏度）：	260	认证状态：	Not Qualified
座面最大高度：	1.75 mm	子类别：	Switching Regulator or Controllers
表面贴装：	YES	切换器配置：	SINGLE
最大切换频率：	65 kHz	端子面层：	Tin (Sn)
端子形式：	GULL WING	端子节距：	1.27 mm
端子位置：	DUAL	处于峰值回流温度下的最长时间：	40
宽度：	3.9 mm	Base Number Matches：	1

NCP1351DDR2G 数据手册

NCP1351

Variable Off Time PWM

Controller

The NCP1351 is a current-mode controller targeting low power

off-line flyback Switched Mode Power Supplies (SMPS) where cost

is of utmost importance. Based on a fixed peak current technique

http://onsemi.com

MARKING DIAGRAMS

(quasi-fixed T ), the controller decreases its switching frequency as

the load becomes lighter. As a result, a power supply using the

NCP1351 naturally offers excellent no-load power consumption,

while optimizing the efficiency in other loading conditions. When the

frequency decreases, the peak current is gradually reduced down to

approximately 30% of the maximum peak current to prevent

transformer mechanical resonance. The risk of acoustic noise is thus

greatly diminished while keeping good standby power performance.

An externally adjustable timer permanently monitors the feedback

activity and protects the supply in presence of a short-circuit or an

overload. Once the timer elapses, NCP1351 stops switching and stays

latched for version A, and tries to restart for version B.

Versions C and D include a dual overcurrent protection trip point,

allowing the implementation of the controller in peak-power

requirements applications such as printers and so on. When the fault is

acknowledged, C version latches-off whereas D version

auto-recovers.

SOIC-8

D SUFFIX

CASE 751

1351x

ALYW

NCP1351x

AWL

YYWWG

PDIP-8

P SUFFIX

CASE 626

= A, B, C, or D Options

= Assembly Location

L, WL = Wafer Lot

Y, YY = Year

The internal structure features an optimized arrangement which

allows one of the lowest available startup current, a fundamental

parameter when designing low standby power supplies.

W, WW = Work Week

G or G = Pb-Free Package

(Note: Microdot may be in either location)

The negative current sensing technique minimizes the impact of the

switching noise on the controller operation and offers the user to select

the maximum peak voltage across his current sense resistor. Its power

dissipation can thus be application optimized.

Finally, the bulk input ripple ensures a natural frequency smearing

which smooths the EMI signature.

PIN CONNECTIONS

TIMER

LATCH

Features

•ꢀQuasi-fixed T , Variable T

Current Mode Control

OFF

GND

DRV

•ꢀExtremely Low Current Consumption at Startup

•ꢀPeak Current Compression Reduces Transformer Noise

•ꢀPrimary or Secondary Side Regulation

•ꢀDedicated Latch Input for OTP, OVP

•ꢀProgrammable Current Sense Resistor Peak Voltage

•ꢀNatural Frequency Dithering for Improved EMI Signature

•ꢀEasy External Over Power Protection (OPP)

•ꢀUndervoltage Lockout

(Top View)

ORDERING INFORMATION

See detailed ordering and shipping information in the package

dimensions section on page 25 of this data sheet.

•ꢀVery Low Standby Power via Off-time Expansion

•ꢀSOIC-8 Package

Typical Applications

• Standard Overcurrent Protection, Latched or

Auto-Recovery, A & B Versions

• Auxiliary Power Supply

• Printer, Game Stations, Low-Cost Adapters

• Off-line Battery Charger

• Dual Trip Point Overcurrent Protection, Latched or

Auto-Recovery, C & D Versions

• These are Pb-Free Devices

November, 2007 - Rev. 3

Publication Order Number:

NCP1351/D

12 3 4 5 6 7...27

中文翻译

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NCP1351DDR2G 替代型号

型号	品牌	替代类型	描述	数据表
NCP1351CDR2G	ONSEMI	完全替代	Variable Off Time PWM Controller
NCP1215ADR2G	ONSEMI	完全替代	Low Cost Variable OFF Time Switched Mode Power Supply Controller
NCP1380BDR2G	ONSEMI	类似代替	Quasi-Resonant Current-Mode Controller for High-Power Universal Off-Line Supplies

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NCP1360	ONSEMI	获取价格	Low Power Offline Constant Current & Constant Voltage Primary Side PWM Current-Mode Contro
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