Datasheet > UC3800_18

UC3800_18

更新时间： 2024-11-19 01:03:23

品牌	Logo	应用领域
友顺 - UTC		/
页数	文件大小	规格书
10页	221K
描述
LOW COST POWER-SAVING MODE PWM CONTROLLER

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数据手册

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UC3800_18 数据手册

UNISONIC TECHNOLOGIES CO., LTD

UC3800/B

Preliminary

LINEAR INTEGRATED CIRCUIT

LOW COST POWER-SAVING

MODE PWM CONTROLLER

FOR FLYBACK CONVERTERS



DESCRIPTION

The UTC UC3800/B is a high performance current mode PWM

controller ideally suited for low standby power. High voltage startup

is implemented in UTC UC3800/B, which features with short

startup time and no standby current. 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 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 UC3800/B 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 * Fixed switch frequency 65kHz

performance.

* Gate output voltage clamped at 16V

* Low start-up current

* Cycle-by-cycle Current Limiting

* Under voltage lockout (UVLO)

* Few external components required

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

* Soft Start

* Dynamic peak current limiting for constant output power

* Built-in synchronized slope compensation

* OTP,OLP,OVP, LNO-OVP, Brownout and V_DDclamp for higher

security



ORDERING INFORMATION

Ordering Number

Package

Packing

Lead Free

Halogen Free

UC3800L-S08-R

UC3800BL-S08-R

UC3800G-S08-R

UC3800BG-S08-R

SOP-8

Tape Reel

www.unisonic.com.tw

1 of 10

QW-R103-083.d

12 3 4 5 6 7...10

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