Datasheet > UPSRB04L-AF5-R

UPSRB04L-AF5-R

更新时间： 2024-11-22 01:14:59

品牌	Logo	应用领域
友顺 - UTC		开关
页数	文件大小	规格书
7页	173K
描述
HIGH PRECISION CC/CV PRIMARY SIDE SWITCHING REGULATOR

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数据手册

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UPSRB04L-AF5-R 数据手册

UNISONIC TECHNOLOGIES CO., LTD

UPSRB04

Preliminary

CMOS IC

HIGH PRECISION CC/CV

PRIMARY SIDE SWITCHING

REGULATOR



DESCRIPTION

The UTC UPSRB04 is a primary control unit for switch mode

charger and adapter applications. The controlled variable is

transferred by an auxiliary winding from the secondary to the

primary side. The device uses Pulse Frequency Modulation (PFM)

method to build discontinuous conduction mode (DCM) flyback

power supplies.

The UTC UPSRB04 operates in primary-side sensing and

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

eliminates the need of loop compensation circuitry while

maintaining stability.

The UTC UPSRB04 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, output over voltage protection, V_DDover voltage

protection, feedback loop open protection, short circuit protection,

leading edge blanking, OTP, V_DDunder voltage lockout, etc.



FEATURES

* ±5% constant voltage regulation at universal AC input

* Primary side control without TL431 and opto-coupler

* High precision constant current regulation at universal AC input

* Programmable CV and CC regulation

* Built-in leading edge blanking

* Built-in primary winding inductance

compensation

* Open circuit protection

* Eliminates control loop compensation circuitry

* Flyback topology in DCM operation

* Random frequency modulation to reduce system EMI

* Driver BJT switch

* Output over voltage protection

* V_DDover voltage protection

* Short circuit protection

* Over temperature protection

* Programmable cable drop compensation



ORDERING INFORMATION

Ordering Number

Package

SOT-25

Packing

Lead Free

Halogen Free

UPSRB04G-AF5-R

UPSRB04L-AF5-R

Tape Reel

www.unisonic.com.tw

1 of 7

QW-R129-033.a

12 3 4 5 6 7

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