有源钳位反激 (ACF) 控制器将业界最高的集成度和转换效率与超低空载功耗相结合

SZ1131 33W to 100W

Silanna CO2 Smart Power™ 技术系列的最新成员通过简化设计和提高性能，同时通过更高效的能源使用来满足环境可持续性目标，解决了工程师面临的极致电源管理挑战。

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SZ1131 提供了简单反激控制器的简易设计，具有 ACF 设计的所有优点，包括回收反激变压器的漏感能量和限制初级MOSFET关断时的漏极电压尖峰。

SZ1131 采用 Silanna Semiconductor 的 OptiMode™ 数字控制架构，可逐周期调整其工作模式，以保持高效率、低 EMI、快速动态负载调节和其他关键电源参数，以响应不断变化的线路电压和加载。在 (90Vac – 265Vac) 输入电压和不同负载的条件下效率最高达 95%，同时结合低于 20mW 的超低空载功耗，可显著降低整体能耗。

SZ1131 集成了自适应数字 PWM 控制器、有源钳位 FET、有源钳位驱动器和高压启动器。针对过热、过压、过流、过功率和短路情况以及变压器磁饱和故障的内置保护进一步减少了对外围元件的需求。

Vin=265 Vac, Vout=20 V, Lout=3.25 A, Vds_pri (max) = 551 V Vds_sec (max) = 95 V

Vin=265 Vac, Vout=20 V, Lout=3.25 A, Vds_pri (max) = 551 V Vds_sec (max) = 95 V

Key Features:

  • Integrated UHV active clamp FET, active clamp driver and start-up regulator
  • Capable of over 95% efficiency
  • Flat efficiency across universal (90Vac to 265Vac) input voltage and load
  • < 20mW system no-load power consumption
  • OptiMode™ cycle-by-cycle adaptive digital control
  • Self-tuning valley mode switching (VMS)
  • Multi-mode operation (burst mode, QR, VMS)
  • > 6 dB EMI margin
  • OTP, OVP, OCP, OPP, output short circuit and transformer saturation protection
  • Up to 65W output power with universal input and 100W+ output power with front-end PFC
  • 16-pin SOIC package
  • CO2 Smart Power by Silanna Semiconductor

Applications:

  • High power density AC/DC power supplies
  • High-efficiency power adapters
  • USB-PD/QC AC/DC power adapters
  • Battery chargers for mobile devices

    SZ1131 is currently available as engineering samples and will be released for full production in Q4, 2021

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