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:
http://www.powerint.com/sites/default/files/product-docs/hiperlcs_family_datasheet.pdf
和
http://www.powerint.com/sites/default/files/PDFFiles/rdr239.pdf
