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UC1108 Scheda tecnica(PDF) 1 Page - Unisonic Technologies |
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UC1108 Scheda tecnica(HTML) 1 Page - Unisonic Technologies |
1 / 8 page UNISONIC TECHNOLOGIES CO., LTD UC1108 Preliminary CMOS IC www.unisonic.com.tw 1 of 8 Copyright © 2015 Unisonic Technologies Co., Ltd QW-R103-098.a LOW-POWER OFF-LINE PRIMARY SIDE REGULATION CONTROLLER DESCRIPTION The UTC UC1108 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 UC1108 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 UC1108 achieves excellent regulation and high average efficiency, yet meets the requirement for no-load consumption less than 30mW. The UTC UC1108 has the built-in programmable cable voltage drop compensation function, which make it flexible to accommodate various cables with different gauges and lengths The UTC UC1108 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, feedback loop open protection, short circuit protection, leading edge blanking, VCC under voltage lockout, etc. FEATURES * 30mW No-load Input Power * Primary side control for eliminating opto-coupler and secondary CV/CC control circuitry * Proprietary CC tightening technique to achieve vertical CC profile * Programmable output cable voltage drop compensation * Compensation for external component temperature variations * Random frequency adjustment to reduce system EMI * Flyback topology in DCM operation * Built-in soft start * Over voltage protection * Short circuit protection SOP-8 ORDERING INFORMATION Ordering Number Package Packing UC1108G-S08-R SOP-8 Tape Reel UC1108G-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 |
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