Datasheet > OB2268

OB2268

更新时间： 2024-11-15 00:55:15

品牌	Logo	应用领域
台湾光宝 - LITEON		/
页数	文件大小	规格书
12页	254K
描述
Current Mode PWM Controller

阅读下载

中文翻译

获取价格

数据手册

如果您发现信息不准确，欢迎纠错

OB2268 数据手册

OB2268

OB2269

Current Mode PWM Controller

OB2268/9 is offered in SOP-8 and DIP-8 packages.

GENERAL DESCRIPTION

FEATURES

OB2268/9 is a highly integrated current mode PWM

control IC optimized for high performance, low

standby power and cost effective offline flyback

converter applications in above 20W power level.

PWM switching frequency at normal operation is

externally programmable and trimmed to tight range.

At no load or light load condition, the IC operates in

extended ‘burst mode’ to minimize switching loss.

Lower standby power and higher conversion

efficiency is thus achieved.

VDD low startup current and low operating current

contribute to a reliable power on startup design with

OB2268/9. A large value resistor could thus be used

in the startup circuit to minimize the standby power.

The internal slope compensation improves system

large signal stability and reduces the possible sub-

harmonic oscillation at high PWM duty cycle output.

Leading-edge blanking on current sense input

removes the signal glitch due to snubber circuit diode

reverse recovery. and greatly reduces the external

component count and system cost in the design.

OB2268/9 offers complete protection coverage with

automatic self-recovery feature including Cycle-by-

Cycle current limiting (OCP), over load protection

(OLP), over temperature protection (OTP), VDD

over voltage protection (OVP) and under voltage

lockout (UVLO). The Gate-drive output is clamped

to maximum 18V to protect the power MOSFET.

Excellent EMI performance is achieved with On-

Bright proprietary frequency shuffling technique

(OB2269 only) together with soft switching control at

the totem pole gate drive output.

■

Extended Burst Mode Control For Improved

Efficiency and Minimum Standby Power Design

Audio Noise Free Operation

External Programmable PWM Switching

Frequency

■

Internal Synchronized Slope Compensation

Low VIN/VDD Startup Current(4uA) and Low

Operating Current (2.3mA)

■

Leading Edge Blanking on Current Sense Input

Complete Protection Coverage With Auto Self-

Recovery

External Programmable Over Temperature

Protection (OTP)

With or Without On-chip VDD OVP for

Output Over Voltage Protection.

Under Voltage Lockout with Hysteresis

(UVLO)

Gate Output Maximum Voltage Clamp (18V)

Line Compensated Cycle-by-Cycle Over-

current Threshold Setting For Constant Output

Current Limiting Over Universal Input Voltage

Range (OCP)

Over Load Protection. (OLP)

■

On-Bright Proprietary Frequency Shuffling

Technology for Improved EMI Performance

(OB2269 only)

APPLICATIONS

Offline AC/DC flyback converter for

■

Laptop Power Adaptor

PC/TV/Set-Top Box Power Supplies

Open-frame SMPS

The tone energy at below 20KHZ is minimized in

operation. Consequently, audio noise performance is

greatly improved.

Battery Charger

TYPICAL APPLICATION

Confidential

A Liteon Semiconductor Company

- 1 -

V2.1

12 3 4 5 6 7...12

中文翻译

下载PDF

与OB2268相关器件

型号	品牌	获取价格	描述	数据表
OB2268AP	LITEON	获取价格	Current Mode PWM Controller
OB2268APAV	LITEON	获取价格	Current Mode PWM Controller
OB2268APV	LITEON	获取价格	Current Mode PWM Controller
OB2268CPAV	LITEON	获取价格	Current Mode PWM Controller
OB2269	LITEON	获取价格	Current Mode PWM Controller
OB2269AP	LITEON	获取价格	Current Mode PWM Controller
OB2269APAV	LITEON	获取价格	Current Mode PWM Controller
OB2269C	ETC	获取价格	current mode pwm controller
OB2269CP	LITEON	获取价格	Current Mode PWM Controller
OB2269CPAV	LITEON	获取价格	Current Mode PWM Controller

与OB2268相关文章

国产厂商思特威CMOS图像传感器芯片单月出货超1亿颗，技术创新引领行业发展
2024-11-14

28
台积电5nm和3nm产能利用率达100%，半导体行业景气度持续攀升
2024-11-14

11
AMD宣布全球裁员约1000人，调整战略聚焦增长
2024-11-14

13
英伟达新AI芯片Rubin或提前半年亮相
2024-11-05

34

产品中心

服务支持

精选活动

关于我们

帮助中心

OB2268

OB2268 数据手册

与OB2268相关器件

与OB2268相关文章

您还可以找

产品中心

服务支持

精选活动

关于我们

帮助中心

OB2268

OB2268 数据手册

与OB2268相关器件

与OB2268相关文章

您还可以找

您在本页遇到什么问题？