Datasheet > UC3863

UC3863

更新时间： 2024-11-24 02:59:03

品牌	Logo	应用领域
友顺 - UTC		/
页数	文件大小	规格书
10页	351K
描述
LOW COST POWER-SAVING MODE PWM CONTROLLER FOR FLYBACK CONVERTERS

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UC3863 数据手册

UNISONIC TECHNOLOGIES CO., LTD

UC3863

LINEAR INTEGRATED CIRCUIT

LOW COST POWER-SAVING

MODE PWM CONTROLLER

FOR FLYBACK CONVERTERS



DESCRIPTION

The UC3863 is a high performance current mode PWM

controller ideally suited for low standby power. The PWM switching

frequency is programmable externally at normal operation. Low

V_DDstartup current make the power reliable on startup design and

a large value resistor could be used in the startup circuit to

minimize the standby power. 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 UC3863 contains protection with automatic recovery

including OLP (over load protection), OTP (over temperature

protection), OVP (over voltage protection), UVLO (V_DDover voltage clamp and under voltage lockout).To protect

the power MOSFET, Gate-drive output is fixed up to 15V max. The UC3863 contains protection OCP (cycle-by-cycle

current limiting).

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. 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 UC3863 has such applications as: battery charger, power adaptor, set-top box power supplies, ink jet

printers, open-frame SMPS



FEATURES

* UTC proprietary frequency hopping technology for Improved EMI

performance.

* Power-saving mode for high light-load and standby efficiency

* Dynamic peak current limiting for constant output power

* Built-in synchronized slope compensation

* Programmable PWM Frequency

* Gate output voltage clamped at 15V

* Low start-up current

* Cycle-by-cycle Current Limiting

* Under voltage lockout (UVLO)

* Few external components required

* OTP,OLP,OVP and V_DDclamp for higher security



ORDERING INFORMATION

Ordering Number

Package

Packing

Lead Free

Halogen Free

UC3863G-AG6-R

UC3863G-D08-T

UC3863G-S08-R

SOT-26

DIP-8

Tape Reel

Tube

UC3863L-D08-T

SOP-8

Tape Reel

www.unisonic.com.tw

1 of 10

QW-R103-058.F

12 3 4 5 6 7...10

中文翻译

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与UC3863相关器件

型号	品牌	获取价格	描述	数据表
UC3863_15	UTC	获取价格	LOW COST POWER-SAVING MODE PWM CONTROLLER
UC3863_17	UTC	获取价格	LOW COST POWER-SAVING MODE PWM CONTROLLER
UC3863A	UTC	获取价格	LOW COST POWER-SAVING MODE PWM CONTROLLER
UC3863AG-AG6-R	UTC	获取价格	LOW COST POWER-SAVING MODE PWM CONTROLLER
UC3863AG-S08-R	UTC	获取价格	LOW COST POWER-SAVING MODE PWM CONTROLLER
UC3863AG-SH2-R	UTC	获取价格	LOW COST POWER-SAVING MODE PWM CONTROLLER
UC3863AL-AG6-R	UTC	获取价格	LOW COST POWER-SAVING MODE PWM CONTROLLER
UC3863AL-S08-R	UTC	获取价格	LOW COST POWER-SAVING MODE PWM CONTROLLER
UC3863AL-SH2-R	UTC	获取价格	LOW COST POWER-SAVING MODE PWM CONTROLLER
UC3863DW	TI	获取价格	Resonant-Mode Power Supply Controllers

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