NCP1234

购买收藏

Controller, Fixed Frequency, Current Mode, for Flyback Converters

制造商：ON

中文数据手册

产品信息

NCP1234 is a new fixed-frequency current-mode controller featuring Dynamic Self-Supply (DSS). This device is pin-to-pin compatible with the previous NCP12xx families.
The DSS function greatly simplifies the design of the auxiliary supply and the VCC capacitor by activating the internal startup current source to supply the controller during transients.
Due to frequency foldback, the controller exhibits excellent efficiency in light load condition while still achieving very low standby power consumption. Internal frequency jittering, ramp compensation, and a versatile latch input make this controller an excellent candidate for converters where component cost is the key constraint.
It features a timer-based fault detection that ensures the detection of overload independently of an auxiliary winding, and an adjustable compensation to help keep the maximum power independent of the input voltage.

Frequency Foldback then Skip Mode in light load and standby conditions
High voltage current source with brown-out detection and dynamic self-supply
Frequency Jittering
4.0 ms Soft-Start
Adjustable Overpower Compensation
Latched / Autorecovery Timer-Based Overload Protection

电路图、引脚图和封装图

NCP1234电路图
NCP1234电路图

在线购买

型号	制造商	描述	购买
NCP1234AD100R2G	ON	IC REG CTRLR FLYBACK PWM	立即购买
NCP1234BD100R2G	ON	IC REG CTRLR FLYBACK PWM 7SOIC	立即购买
NCP1234AD65R2G	ON	Converter Offline Flyback Topology 65kHz 7-SOIC	立即购买
NCP1234BD65R2G	ON	Converter Offline Flyback Topology 65kHz 7-SOIC	立即购买

技术资料

标题	类型	大小（KB）	下载
Fixed Frequency Current Mode Controller for Flyback Converters	PDF	225	点击下载
NCP1236: 65 W Off-Line Adapter	PDF	3072	点击下载
SOIC 7 CASE OUTLINE	PDF	60	点击下载
NCP1234_PO.JPG	UNKNOW	5	点击下载
NCP1234_PD.JPG	UNKNOW	16	点击下载
NCP1234_AD.JPG	UNKNOW	32	点击下载

应用案例更多案例

51单片机控制动态数码管显示12345和HELLO字样的设计
如图4.13.1所示，P0端口接动态数码管的字形码笔段，P2端口接动态数码管的数位选择端，P1.7接一个开关，当开关接高电平时，显示“12345”字样；当开关接低电平时，显示“HELLO”字样。
2019-05-15
安森美半导体基于NCP1246和NCP4354低待机能耗电源适配器方案
交流-直流（AC-DC）电源适配器的应用非常广泛，如用于笔记本电脑、液晶显示器及打印机等。这些电源适配器长时间处于空载待机模式，而且使用量巨大，由此带来巨大的电能损耗。美国“能源之星”标准对这类外部电源（EPS）...
2013-09-26
测试123456
used.nbsp;Thenbsp;designnbsp;solutionnbsp;isnbsp;optimizednbsp;fornbsp;high
2021-04-13
NCP1200显示器开关电源电路图,NCP1200 monitor power supply
NCP1200显示器开关电源电路图,NCP1200 monitor power supply 关键字：NCP1200,开关电源 NCP1200显示器开关电源电路图，多路输出
2018-09-21
面向数字政府4.0，中兴通讯端出了“12345理念”套餐
从内涵来看，从数字政府1.0到4.0，可谓层层递进，逐步深化。从时间线来看，数字政府4.0，与今年国家推动新基建部署相契。新基建强调自主创新，正好在数字政府上一展身手。张军说，数字政府4.0，是新时代数字政府建设的最...
2020-10-14
MAX1233/MAX1234 触摸屏控制器入门
MAX1233/MAX1234触摸屏控制器入门摘要：本应用笔记介绍怎样
2016-10-14
MAX1233/MAX1234触摸屏控制器入门
摘要：本应用笔记介绍怎样使用MAX1233/MAX1234触摸屏控制器的功能。所提供的简化控制台菜单系统支持对MAX1233/MAX1234器件寄存器的底层直接访问。每一寄存器在32个SPI™时钟周期内
2016-10-14
MAX1233/MAX1234触摸屏控制器入门
摘要：本应用笔记介绍怎样使用MAX1233/MAX1234触摸屏控制器的功能。所提供的简化控制台菜单系统支持对MAX1233/MAX1234器件寄存器的底层直接访问。每一寄存器在32个SPI™时钟周期内
2016-10-14

系列产品索引查看所有产品

NV25040WF	NUF4220	NB100LVEP91	NLSX5002
NTNS41006PZ	NCP1249	NCP1653	NCP1244
NUF6410	NCP302045	NB3H73113G	NCL30186
NCP1252	NSR1020MW2	NCP51400	NCP1093
NCP4355	NLSV4T244	NB4L52	NB3L208K

元器件商品{{ gnNumber + hkNumber }}