Datasheet > OB2263MP

OB2263MP

更新时间： 2024-11-15 02:51:23

品牌	Logo	应用领域
其他 - ETC		/
页数	文件大小	规格书
13页	2442K
描述
Current Mode PWM Controller

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OB2263MP 数据手册

OB2263

Current Mode PWM Controller^{Frequency Shuffling}

Tone energy at below 20KHZ is minimized in the

design and audio noise is eliminated during operation.

OB2263 is offered in SOT23-6, SOP-8 and DIP-8

GENERAL DESCRIPTION

OB2263 is a highly integrated current mode PWM

control IC optimized for high performance, low

standby power and cost effective offline flyback

converter applications in sub 30W range.

packages.

FEATURES

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.

■

On-Bright Proprietary Frequency Shuffling

Technology for Improved EMI Performance.

Extended Burst Mode Control For Improved

Efficiency and Minimum Standby Power Design

Audio Noise Free Operation

External Programmable PWM Switching

Frequency

■

VDD low startup current and low operating current

contribute to a reliable power on startup design with

OB2263. 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(CS) input

removes the signal glitch due to snubber circuit diode

reverse recovery and thus greatly reduces the external

component count and system cost in the design.

OB2263 offers complete protection coverage with

automatic self-recovery feature including Cycle-by-

Cycle current limiting (OCP), over load protection

(OLP), VDD over voltage clamp 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

together with soft switching control at the totem pole

gate drive output.

■

Internal Synchronized Slope Compensation

Low VDD Startup Current and Low Operating

Current (1.4mA)

Leading Edge Blanking on Current Sense Input

Good Protection Coverage With Auto Self-

Recovery

■

VDD Over Voltage Clamp and Under Voltage

Lockout with Hysteresis (UVLO)

Gate Output Maximum Voltage Clamp (18V)

On-Bright Proprietary Line Input Compensated

Cycle-by-Cycle Over-current Threshold Setting

For Constant Output Power Limiting Over

Universal Input Voltage Range.

Overload Protection (OLP)

APPLICATIONS

Offline AC/DC flyback converter for

■

Battery Charger

Power Adaptor

Set-Top Box Power Supplies

Open-frame SMPS

TYPICAL APPLICATION

Confidential to Micro Bridge

- 1 -

OB_DOC_DS_63B5

12 3 4 5 6 7...13

中文翻译

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OB2269C	ETC	获取价格	current mode pwm controller
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