NCP1566: Highly Integrated Dual-Mode Active Clamp PWM Controller

具体说明: The NCP1566 is a highly integrated dual-mode activ...
  • The NCP1566 is a highly integrated dual-mode active-clamp PWM controller targeting next-generation high-density, high-performance and small to medium power level isolated dc-dc converters for use in telecom and datacom industries. It can be configured in either voltage mode control with input voltage feed-forward or peak current mode control. Peak current mode control may be implemented with input voltage feedforward as well. Adjustable adaptive overlap time optimizes system efficiency based on input voltage and load conditions. This controller integrates all the necessary control and protection functions to implement an isolated active clamp forward or asymmetric half-bridge converter. It integrates a high-voltage startup bias regulator. The NCP1566 has a line undervoltage detector, cycle-by-cycle current limiting, line voltage dependent maximum duty ratio limit, over voltage protection, and programmable overtemperature protection using an external thermistor. It also includes a dual-function pin used for communicating the presence of a fault but also for shutting down the controller. A dedicated dual-function synchronization pin eases operations when associating bricks together.
  • 特性
  • Both Voltage Mode Control and Current Mode Control - Flexible topology solution
  • Line feedforward - Stable constant crossover across input voltage range
  • Adaptive Overlap time Control - Extended ZVS across input & output operating conditions
  • Integrated 120 V HV Startup - Lossless startup and reduced Vcc capacitor via dynamic startup
  • Programmable Line Undervoltage Lockout (UVLO) with Adjustable Hysteresis - Safely limits operating input voltage range
  • Cycle by Cycle Peak Current Limiting - Increased converter robustness
  • Adjustable Over Power Protection & Overcurrent Protection Based on Average Current - Precise output power limit
  • Programmable Duty Ratio Clamp - Efficiently prevents transformer saturation
  • Programmable Soft-Start - Lowers components stress at startup
  • Programmable Shutdown and Restart Delays - Robustness and flexibility of design
  • Programmable External Overtemperature Protection Using Thermistor - Robustness and flexibility of design
  • FLT/SD pin Used for Fault reporting and Shutdown Input - Easy system integration
  • Programmable Oscillator with a 1-MHz Maximum Frequency and Synchronization Capability. - Ready for high frequency designs & Paralleling
  • Over Voltage Protection through a dedicated pin - Robustness and flexibility of design
  • Main Switch Drive Capability of -2 A/3 A - Drive larger MOSFETs more efficiently
  • Active Clamp Switch Drive Capability of -2 A/1 A
  • Vcc Range: from 6.5 V to 20 V
  • 5 V/2% Voltage Reference
  • 应用
  • High Efficiency Isolated dc−dc Converters
  • 24 V and 48 V Telecom systems
  • Server Power Supplies
  • 48 V Automotive Applications
  • 终端产品
  • Telecom Converters
  • High power Servers
  • Audio PA converters
  • 技术文档及设计资源
    评估/开发工具信息
    供货情况和样品
    NCP1566MNTXG
  • 状况: Active
  • Compliance: Pb-free Halide free 
  • 具体说明: Highly Integrated Dual-Mode Active Clamp PWM Controller, Highly Integrated Dual-Mode Active Clamp PWM Controller
  • 封装 类型: QFN-24
  • 封装 外形: 485CW
  • MSL: 1
  • 容器 类型: REEL
  • 容器 数量: 4000
  • Specifications
  • Topology: Forward 
  • Phases:
  • Control Mode: Current/Voltage Mode 
  • VCC Min (V): 6.5 
  • VCC Max (V): 20 
  • fSW Typ (kHz): Programmable up to 1 MHz 
  • Package Type: QFN-24 
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