Datasheet > UC3869AG-S08-R

UC3869AG-S08-R

更新时间： 2024-11-30 01:06:35

品牌	Logo	应用领域
友顺 - UTC		高压
页数	文件大小	规格书
9页	310K
描述
HIGH VOLTAGE GREEN MODE PWM CONTROLLER

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UC3869AG-S08-R 数据手册

UNISONIC TECHNOLOGIES CO., LTD

UC3869A

CMOS IC

HIGH VOLTAGE GREEN MODE

PWM CONTROLLER



DESCRIPTION

The UTC UC3869A is a highly integrated current mode PWM

control IC with high voltage start up, optimized for high

performance, low standby power consumption and cost effective

offline flyback converter applications.

PWM switching frequency at normal operation is internally fixed

and is trimmed to a tight range. At no load condition, the IC

operates in power-saving mode for lower standby power,

decreasing frequency for Higher conversion efficiency at light load

condition. The internal slope compensation improves system

stability at high PWM duty cycle output. Leading-edge blanking on

current sense input removes the signal glitch, which offering

minimal external component count in the design.

The UTC UC3869A offers complete protection coverage

including Cycle-by-Cycle current limiting (OCP), V_DDunder voltage

lockout (UVLO), over load protection (OLP), over temperature

protection (OTP), and over voltage protection (OVP). Excellent EMI

performance is achieved with UTC proprietary frequency hopping

technique (ZL201020615247.1) together with soft driver control.

Audio noise is eliminated due to switch frequency more than 20kHz

during operation. The tone energy at below 22 kHz is minimized to

avoid audio noise during operation.



FEATURES

* High voltage startup

* Power on soft start reducing MOSFET Vds stress

* Efficiency and minimum standby power

* Frequency shuffling for EMI

* Audio noise free operation

* Fixed 65 kHz switching frequency

* Comprehensive protection coverage

V_DDUnder Voltage Lockout with Hysteresis (UVLO)

Cycle-by-cycle over current protection (OCP)

Overload Protection (OLP)

External programmable Over Temperature Protection (OTP)

V_DDOver voltage Protection(OVP)

www.unisonic.com.tw

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