Datasheet > UC3879AG-S08-R

UC3879AG-S08-R

更新时间： 2024-01-06 16:24:58

品牌	Logo	应用领域
友顺 - UTC		/
页数	文件大小	规格书
9页	336K
描述
Switching Regulator/Controller,

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UC3879AG-S08-R 技术参数

生命周期：	Active	包装说明：	,
Reach Compliance Code：	unknown	Base Number Matches：	1

UC3879AG-S08-R 数据手册

UNISONIC TECHNOLOGIES CO., LTD

UC3879A

Preliminary

CMOS IC

LOW COST POWER-SAVING

MODE PWM CONTROLLER

FOR FLYBACK CONVERTERS



DESCRIPTION

The UTC UC3879A provides a CCM/valley switching mixed

mode operation for better efficiency performance. The UTC

UC3879A 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. 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.

SOP-8

The UTC UC3879A contains protection with automatic recovery

including OLP (over load protection), OCP (cycle-by-cycle current

limiting), and UVLO (V_DDover voltage clamp and under voltage

lockout). It also provides the protections including OTP (over

temperature protection), BNO(AC Brown Out protection) , LNO(AC

Over voltage protection), OVP (V_CCor DC output over voltage

protection) with automatic recovery. To protect the power

MOSFET, Gate-drive output is fixed up to 16V max.

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 minima

external component count in the design. 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.

UTC UC3879A is packaged by using tiny SOP-8 package. It

has such applications as: battery charger, power adaptor, set-top

box power supplies, ink jet printers, open-frame SMPS.



FEATURES

* Built in high voltage startup

* Built in x-cap discharge function

* Proprietary frequency hopping for Improved EMI performance

* Cycle-by-cycle current limiting

* CCM/Valley Switching Operation

* Fixed switch frequency 60~70kHz

* Dynamic peak current limiting for constant output power

* Built-in synchronized slope compensation

* Gate output voltage clamped at 16V

* Adjustable DC output OVP

* OLP/V_CCOVP/OTP/BNO/LNO (automatic recovery)

* Internal Soft Start

www.unisonic.com.tw

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QW-R103-173.a

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与UC3879AG-S08-R相关器件

型号	品牌	获取价格	描述	数据表
UC3879AL-S08-R	UTC	获取价格	Switching Regulator/Controller,
UC3879DW	TI	获取价格	PHASE SHIFT RESONANT CONTROLLER
UC3879DWTR	TI	获取价格	PHASE SHIFT RESONANT CONTROLLER
UC3879DWTRG4	TI	获取价格	Phase Shift Resonant Controller 20-SOIC 0 to 70
UC3879L	TI	获取价格	0.1A SWITCHING CONTROLLER, 300kHz SWITCHING FREQ-MAX, CQCC28
UC3879N	TI	获取价格	PHASE SHIFT RESONANT CONTROLLER
UC3879NG4	TI	获取价格	Phase Shift Resonant Controller 20-PDIP 0 to 70
UC3879Q	ETC	获取价格	Current/Voltage-Mode SMPS Controller
UC3879QTR	TI	获取价格	0.02A SWITCHING CONTROLLER, 300kHz SWITCHING FREQ-MAX, PQCC20, PLASTIC, LCC-20
UC387DW	ETC	获取价格	Analog IC

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