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NCP1351DDR2G: 产品描述Switching Controllers PWM CONTROLLER; 产品类别电源/电源管理电源电路; 文件大小524KB，共27页; 制造商ON Semiconductor(安森美); 官网地址http://www.onsemi.cn; 标准

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NCP1351DDR2G概述

Switching Controllers PWM CONTROLLER

NCP1351DDR2G规格参数

参数名称	属性值
Brand Name	ON Semiconductor
是否无铅	不含铅
是否Rohs认证	符合
零件包装代码	SOIC
包装说明	SOP, SOP8,.25
针数	8
制造商包装代码	751-07
Reach Compliance Code	compliant
ECCN代码	EAR99
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
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

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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

(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.

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.

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.

Features

http://onsemi.com

MARKING DIAGRAMS

SOIC-8

D SUFFIX

CASE 751

1351x

ALYW

PDIP-8

P SUFFIX

CASE 626

L, WL

Y, YY

W, WW

or G

NCP1351x

AWL

YYWWG

= A, B, C, or D Options

= Assembly Location

= Wafer Lot

= Year

= Work Week

= Pb-Free Package

(Note: Microdot may be in either location)

PIN CONNECTIONS

FB 1

Ct 2

CS 3

GND 4

(Top View)

8 TIMER

7 LATCH

6 V

5 DRV

•

Quasi-fixed T

, Variable T

OFF

Current Mode Control

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

Very Low Standby Power via Off-time Expansion

SOIC-8 Package

Standard Overcurrent Protection, Latched or

Auto-Recovery, A & B Versions

•

Dual Trip Point Overcurrent Protection, Latched or

Auto-Recovery, C & D Versions

•

These are Pb-Free Devices

ORDERING INFORMATION

See detailed ordering and shipping information in the package

dimensions section on page 25 of this data sheet.

Typical Applications

•

Auxiliary Power Supply

•

Printer, Game Stations, Low-Cost Adapters

•

Off-line Battery Charger

Semiconductor Components Industries, LLC, 2007

November, 2007 - Rev. 3

Publication Order Number:

NCP1351/D

NCP1351DDR2G相似产品对比

	NCP1351DDR2G	NCP1351CDR2G	NCP1351ADR2G
描述	Switching Controllers PWM CONTROLLER	Switching Controllers PWM CONTROLLER	Switching Controllers OSPI PWM CONTROLLER
Brand Name	ON Semiconductor	ON Semiconductor	ON Semiconductor
是否无铅	不含铅	不含铅	不含铅
是否Rohs认证	符合	符合	符合
零件包装代码	SOIC	SOIC	SOIC
包装说明	SOP, SOP8,.25	SOP, SOP8,.25	SOP, SOP8,.25
针数	8	8	8
制造商包装代码	751-07	751-07	751-07
Reach Compliance Code	compliant	compliant	compliant
ECCN代码	EAR99	EAR99	EAR99
模拟集成电路 - 其他类型	SWITCHING CONTROLLER	SWITCHING CONTROLLER	SWITCHING CONTROLLER
控制模式	CURRENT-MODE	CURRENT-MODE	CURRENT-MODE
控制技术	PULSE WIDTH MODULATION	PULSE WIDTH MODULATION	PULSE WIDTH MODULATION
最大输入电压	28 V	28 V	28 V
最小输入电压	9.5 V	9.5 V	9.5 V
标称输入电压	12 V	12 V	12 V
JESD-30 代码	R-PDSO-G8	R-PDSO-G8	R-PDSO-G8
JESD-609代码	e3	e3	e3
长度	4.9 mm	4.9 mm	4.9 mm
湿度敏感等级	1	1	1
功能数量	1	1	1
端子数量	8	8	8
最大输出电流	0.4 A	0.4 A	0.4 A
封装主体材料	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY
封装代码	SOP	SOP	SOP
封装等效代码	SOP8,.25	SOP8,.25	SOP8,.25
封装形状	RECTANGULAR	RECTANGULAR	RECTANGULAR
封装形式	SMALL OUTLINE	SMALL OUTLINE	SMALL OUTLINE
峰值回流温度（摄氏度）	260	260	260
认证状态	Not Qualified	Not Qualified	Not Qualified
座面最大高度	1.75 mm	1.75 mm	1.75 mm
表面贴装	YES	YES	YES
切换器配置	SINGLE	SINGLE	SINGLE
最大切换频率	65 kHz	65 kHz	65 kHz
端子面层	Tin (Sn)	Tin (Sn)	Tin (Sn)
端子形式	GULL WING	GULL WING	GULL WING
端子节距	1.27 mm	1.27 mm	1.27 mm
端子位置	DUAL	DUAL	DUAL
处于峰值回流温度下的最长时间	40	40	40
宽度	3.9 mm	3.9 mm	3.9 mm
Base Number Matches	1	1	1

NCP1351DDR2G

NCP1351DDR2G在线购买

NCP1351DDR2G概述

NCP1351DDR2G规格参数

文档预览

NCP1351DDR2G相似产品对比

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