Datasheet > UCSR3654

UCSR3654

更新时间： 2023-12-06 20:02:53

品牌	Logo	应用领域
友顺 - UTC		/
页数	文件大小	规格书
9页	221K
描述
high precision cc/cv primary-side pwm power s...

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UCSR3654 数据手册

UNISONIC TECHNOLOGIES CO., LTD

UCSR3654

Preliminary

CMOS IC

HIGH PRECISION CC/CV

PRIMARY-SIDE PWM POWER

SWITCH

DIP-8



DESCRIPTION

The UTC UCSR3654 is a primary control switch mode charger

and adapter applications. The controlled variable is transferred by

an auxiliary winding from the secondary to the primary side. The

device integrates PWM controller to enhance the performance of

discontinuous conduction mode (DCM) flyback converters.

The UTC UCSR3654 operates in primary-side sensing and

regulation. Opto-coupler and TL431 could be eliminated. It also

provides off-time modulation to linearly decrease PWM frequency

under light-load conditions so that low standby power can be

achieved.

SOP-8

The UTC UCSR3654 achieves high precision CV/CC regulation

and high power efficiency. It offers comprehensive protection

coverage with auto-recovery features including Cycle-by-cycle

current limiting, V_DDover voltage protection, V_DDclamp, OTP,

leading edge blanking, V_DDunder voltage lockout, etc.



FEATURES

* Built-in primary winding inductance

* Built-in 650V Power MOSFET

compensation

* Power on soft start

* Gate Output Maximum Voltage Clamped at

15V

* ±5% constant voltage regulation at universal AC input

* High precision constant current regulation at universal AC input

* Primary side control without TL431 and opto-coupler

* Programmable CV and CC regulation

* Cycle-by-cycle current limiting

* Over voltage protection

* V_DDunder-voltage lockout

* Programmable cable compensation in CV mode

* Flyback topology in DCM operation

* Frequency hopping to reduce system EMI

* Built-in leading edge blanking



ORDERING INFORMATION

Ordering Number

Lead Free

Package

Packing

Halogen Free

UCSR3654L-D08-T

UCSR3654L-S08-R

UCSR3654G-D08-T

UCSR3654G-S08-R

DIP-8

Tube

SOP-8

Tape Reel

www.unisonic.com.tw

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