|
PowerInt公司的HiperLCS系列具有多功能控制器,高邊和低邊柵極驅(qū)動器,以及有兩個(gè)半橋連接的功率MOSFET的綜合LLC功率級,節(jié)省了多達(dá)30個(gè)外接元件,最大工作頻率1MHz,穩(wěn)態(tài)工作頻率高達(dá)500kHz,滿負(fù)載效率高達(dá)98%,主要用在高效電源(80+銀,金和白金),LCD TV電源,LED街區(qū)和區(qū)域合作照明,打印機(jī)電源和音頻放大器電源.本文介紹了HiperLCS系列主要特性,方框圖, LCD TV和PC主電源應(yīng)用電路圖, 150 W激光打印機(jī)電源以及采用LCS701HG的125 W LCD TV電源電路圖,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. Figure 1 shows a simplified schematic of a HiperLCS based power stage where the LLC resonant inductor is integrated into the transformer. 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(yīng)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.HiperLCS系列LCD TV和PC主電源應(yīng)用電路圖
圖3.150 W激光打印機(jī)電源 采用LCS701HG的125 W LCD TV電源 125 W LLC DC-DC Resonant Converter Using HiperLCSTM LCS701HG This document is an engineering report describing a 12 V and 24 V, 125 W LLC DC-DC converter utilizing a LCS701HG integrated LLC power stage IC. This power supply is intended as for use in an LCD TV with LED back lighting. The board requires 12 VDC and 380 VDC inputs. The document contains the power supply specification, schematic, bill of materials, transformer documentation, printed circuit layout, and performance data. 125 W LCD TV電源主要特性: Low Profile Design 11 mm height idea for low profile LCD TV designs Low part count solution Integration of controller, drivers and MOSFET half bridge in a single HiperLCS IC dramatically reduces component count and complexity High Operating Frequency (190 kHz) Enabled use of ceramic output capacitors Enabled use of low profile EFD35 core size High Performance >94% full load efficiency Excellent output cross regulation Lossless capacitive current sense for reduced losses Burst mode ensures regulation under no-load condition
圖4.125 W LCD TV電源外形圖(頂視圖:2.97” x 5.8” (75.44 mm x 147.32 mm)) 1125 W LCD TV電源指標(biāo):
圖5.125 W LCD TV電源電路圖 125 W LCD TV電源材料清單(BOM):
圖6.電源變壓器電路圖 電源變壓器主要指標(biāo):
圖7.125 W LCD TV電源PCB布局圖(頂層)(尺寸為密爾)
圖8.125 W LCD TV電源PCB布局圖(底層) 詳情請見: 
hiperlcs_family_datasheet[1].pdf
(2.69 MB)
der270[1].pdf
(6.93 MB)
|
