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Powerint公司的HiperLCS系列LCS702HG集成了多功能控制器,高邊和低邊柵極驅動(dòng)器,以及半橋配置的兩個(gè)功率MOSFET,可節省30多個(gè)外接元件,工作頻率高達1MHz,20%,50%和100%負載點(diǎn)的平均效率為95%,主要用在高效電源(80PLUS 銀,金和白金),LCD TV電源和LED街區和區域照明.本文介紹了HiperLCS系列主要特性,方框圖, 150 W 激光打印機電源圖以及采用HiperLCSTM LCS702HG的150W LLC高壓DC/DC諧振轉換器參考設計主要特性,電路圖,材料清單和PCB布局圖. The HiperLCS is an integrated LLC power stage incorporating a multi-function controller, high-side and low-side gate drivers, plus two power MOSFETs in a half-bridge configuration. The variable frequency controller provides high efficiency by switching the power MOSFETs at zero voltage (ZVS), eliminating switching losses. HiperLCS系列主要特性: • LLC half-bridge power stage incorporating controller, high and low-side gate drives, and high-voltage power MOSFETs • Eliminates up to 30 external components • High maximum operating frequency of 1 MHz • Nominal steady-state operation up to 500 kHz • Dramatically reduces magnetics size and allows use of SMD ceramic output capacitors • Precise duty symmetry balances output rectifier current, improving efficiency • 50% ±0.3% typical at 300 kHz • Comprehensive fault handling and current limiting • Programmable brown-in/out thresholds and hysteresis • Undervoltage (UV) and overvoltage (OV) protection • Programmable over-current protection (OCP) • Short-circuit protection (SCP) • Over-temperature protection (OTP) • Programmable dead-time for optimized design • Programmable burst mode maintains regulation at no-load and improves light load efficiency • Programmable soft-start time and delay before soft-start • Accurate programmable minimum and maximum frequency limits • Single package designed for high-power and high-frequency • Reduces assembly cost and reduces PCB layout loop areas • Simple single clip attachment to heat sink • Exposed thermal pad connected to ground potential – no insulators required between package and heat sink • Staggered pin arrangement for simple PC board routing and high-voltage creepage requirements • Paired with HiperPFS PFC product gives complete, high efficiency, low part count PSU solutions HiperLCS系列應用: • High-efficiency power supplies (80 PLUS Silver, Gold and Platinum) • LCD TV power supplies • LED street and area lighting • Printer power supplies • Audio amplifier 
圖1. HiperLCS系列方框圖
圖2.150 W 激光打印機電源 采用HiperLCSTM LCS702HG的150W LLC高壓DC/DC諧振轉換器參考設計 This document is an engineering report describing a 24 V, 150 W LLC DC-DC converter utilizing a LCS702HG integrated LLC power stage IC. The report and board is intended as a general purpose test platform to demonstrate operation and capabilities of the HiperLCS family of devices. The design operates from an input voltage range of 300 V to 420 V DC and requires an auxiliary supply of 12 V. The high-voltage DC input in a typical system would be supplied from a PFC stage and the 12 V from system bias or standby supply. 150W電源參考設計主要特性: Low parts count, low cost, simple resonant (LLC) converter Integration of controller, high-side and low-side MOSFETS and drivers reduces component count and design effort High operating frequency (250 kHz) Reduces transformer core size (EEL25) and size of converter Enables ceramic in place of electrolytic output capacitors High-efficiency >95% efficiency at full load >95% average efficiency (20%, 50%, 100% load points) Capacitive current sense for low power dissipation Burst mode ensures no-load regulation
圖3. 150W電源參考設計外形圖 150W電源參考設計指標:
圖5.150W電源參考設計電路圖 150W電源參考設計材料清單(BOM):
圖6. 150W電源變壓器電路框圖
圖7.150W電源PCB布局圖(頂層)
圖8.150W電源PCB布局圖(底層) 詳情請見(jiàn): http://www.powerint.com/sites/default/files/product-docs/hiperlcs_family_datasheet.pdf 和 http://www.powerint.com/sites/default/files/PDFFiles/rdr239.pdf |
