Datasheet > UC3875L-S08-R

UC3875L-S08-R

更新时间： 2024-11-02 20:07:23

品牌	Logo	应用领域
友顺 - UTC		开关
页数	文件大小	规格书
9页	290K
描述
Switching Controller

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技术参数
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UC3875L-S08-R 技术参数

生命周期：	Active	包装说明：	,
Reach Compliance Code：	unknown	ECCN代码：	EAR99
HTS代码：	8542.39.00.01	风险等级：	5.68
模拟集成电路 - 其他类型：	SWITCHING CONTROLLER	Base Number Matches：	1

UC3875L-S08-R 数据手册

UNISONIC TECHNOLOGIES CO., LTD

UC3875

Preliminary

LINEAR INTEGRATED CIRCUIT

LOW COST POWER-SAVING

MODE PWM CONTROLLER

FOR FLYBACK CONVERTERS



DESCRIPTION

The UTC UC3875 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 UTC UC3875 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 UTC UC3875 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 UTC UC3875 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

Lead Free

Package

SOP-8

Packing

Halogen Free

UC3875L-S08-R

UC3875G-S08-R

Tape Reel

www.unisonic.com.tw

1 of 9

QW-R103-075.a

12 3 4 5 6 7...9

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与UC3875L-S08-R相关器件

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UC3876N	TI	获取价格	Phase Shift Resonant Controller

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