Datasheet > UC3916A

UC3916A

更新时间： 2024-09-12 14:55:15

品牌	Logo	应用领域
友顺 - UTC		/
页数	文件大小	规格书
9页	365K
描述
low cost power-saving mode pwm controller for...

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

UC3916A 数据手册

UNISONIC TECHNOLOGIES CO., LTD

UC3916A

Preliminary

CMOS IC

LOW COST POWER-SAVING

MODE PWM CONTROLLER

FOR FLYBACK CONVERTERS



DESCRIPTION

The UTC UC3916A provides a CCM/valley switching mixed

mode operation for better efficiency performance. The operation

mode stays at CCM at heavy load, and switch to valley switching at

light load.

SOP-8

The UTC UC3916A 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.

The UTC UC3916A 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 UC3916A 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

* 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

1 of 9

QW-R103-171.a

12 3 4 5 6 7...9

中文翻译

下载PDF

与UC3916A相关器件

型号	品牌	获取价格	描述	数据表
UC3943	UTC	获取价格	high performance current mode controllers
UC39431	TI	获取价格	Precision Adjustable Shunt Regulator
UC39431B	TI	获取价格	Precision Adjustable Shunt Regulator
UC39431BD	TI	获取价格	VOLT REGULATOR\|ADJUSTABLE\|+10.42V\|BIPOLAR\|SOP\|8PIN\|PLASTIC
UC39431BJ	TI	获取价格	1-OUTPUT THREE TERM VOLTAGE REFERENCE, CDIP8
UC39431BN	TI	获取价格	VOLT REGULATOR\|ADJUSTABLE\|+10.42V\|BIPOLAR\|DIP\|8PIN\|PLASTIC
UC39431D	TI	获取价格	VOLT REGULATOR\|ADJUSTABLE\|+10.42V\|BIPOLAR\|SOP\|8PIN\|PLASTIC
UC39431DG4	TI	获取价格	1-OUTPUT THREE TERM VOLTAGE REFERENCE, 5V, PDSO8, 0.150 INCH, PLASTIC, SOIC-8
UC39431DTR	ETC	获取价格	Industrial Control IC
UC39431J	TI	获取价格	1-OUTPUT THREE TERM VOLTAGE REFERENCE, 5V, CDIP8, CERAMIC, DIP-8