TI TIDA－01494 480W工业电源参考设计

TI公司的TIDA-01494是480W工业电源AC／DC转换器参考设计,具有PFC前端和半桥LLC谐振转换器,输入电压85V到 265VAC,提供20A连续电流,可调输出电压从22V到28V,满负载时的效率93.5%,峰值效率大于94%,能够实现自然冷却,功率因素大于0.99,满足Per IEC 61000-3-2 Class A的PFC稳压和电流THD,主要用在工业AC／DC,DIN轨电源,医疗电源,能量存储系统和电池充电器.本文介绍了参考设计TIDA-01494主要特性和指标,框图,电路图,材料清单和PCB设计图.
Industrial AC／DC power supplies are used in various applications such as process control, data logging,machinery control, instrumentation, factory automation, and security systems. These AC／DC suppliesprovide a convenient means for powering DC operated devices including programmable logic controllers(PLCs), sensors, transmitters and receivers, analyzers, motors, actuators, solenoids, relays, and so on.
These supplies are convection cooled and need to support features like power boost where it supplies aincreased output load for a short duration. The supplies operate over a wide input range from 85- to 265-VAC, delivering full load for entire input voltage range. The output voltages from these supplies range from5 to 56 V with power ratings from 7.5 to 480 W. Many of these supplies can be connected in parallel forhigher power applications.
This reference design is a 480-W high efficiency industrial AC／DC power supply. The design consists of aCCM boost PFC converter, which operates from an input voltage range of 85- to 265-V AC RMS andgenerates a 390-V DC bus. The second stage is made up of an isolated half-bridge LLC stage, whichgenerates a 24-V, 20-A nominal output. The output voltage range is settable from 22 to 28 V usingpotentiometer present on the board. Industrial power supplies have requirements of high efficiency overtheir entire operating voltage range and wide load variations from a 50% to 100% load. This designdemonstrates high efficiency operation in a small form factor (155 × 125 mm) and delivers continuous480 W of power over the entire input ope...