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USRB01G-S08-R Datasheet(PDF) 1 Page - Unisonic Technologies |
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USRB01G-S08-R Datasheet(HTML) 1 Page - Unisonic Technologies |
1 / 7 page UNISONIC TECHNOLOGIES CO., LTD USRB01 Preliminary LINEAR INTEGRATED CIRCUIT www.unisonic.com.tw 1 of 7 Copyright © 2015 Unisonic Technologies Co., Ltd QW-R103-080.b HIGH PRECISION CC/CV PRIMARY SIDE SWITCH DESCRIPTION The UTC USRB01 is a primary controller for 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 USRB01 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 USRB01 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, VDD over voltage protection, feedback loop open protection, short circuit protection, leading edge blanking, OTP, VDD under voltage lockout, etc. FEATURES SOP-8 * ±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 * Eliminates control loop compensation circuitry * Flyback topology in DCM operation * Random frequency modulation to reduce system EMI * Built-in power NPN * Programmable cable drop compensation * Built-in leading edge blanking * Built-in primary winding inductance compensation * Open circuit protection * Output over voltage protection * VDD over voltage protection * Short circuit protection * Over temperature protection ORDERING INFORMATION Ordering Number Package Packing USRB01G-S08-R SOP-8 Tape Reel USRB01G-S08-R (1)Packing Type (2)Package Type (1) R: Tape Reel (2) S08: SOP-8 (3) G: Halogen Free and Lead Free (3)Green Package MARKING |
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