Analog Devices / Maxim Integrated MAX15004电流模式PWM控制器
Maxim IC MAX15004A和MAX15004B高性能电流模式PWM控制器在启动后，运行时输入电压降至2.5V，而且包含真空荧光显示器(VFD)的输出过电压保护。Maxim IC MAX15004 PWM控制器集成了为实现固定频率隔离/非隔离电源供应所需的所有构建模块。可简便地围绕MAX15004设计通用升压式、反激式、正激式和SEPIC转换器。电流模式控制架构提供出色的线路瞬态响应和逐周期电流限制，同时简化了频率补偿。可编程斜率补偿进一步简化了设计。60ns快速电流限制响应时间和300mV低电流限制阈值使控制器适用于高效率的高频DC-DC转换器。该器件包含一个内部误差放大器和1%的精度参考，为初级侧稳压单端反激式转换器或非隔离转换器提供服务。这些Maxim IC PWM控制器是汽车、VFD电源、隔离反激式、正激式和非隔离式SEPIC以及升压转换器等各种应用的理想产品。
特性
- Wide Supply Voltage Range Meets Automotive Power-Supply Operating Requirement Including "Cold Crank" Conditions
- 4.5V to 40V Operating Input Voltage Range (Can Operate at Lower Voltage After Startup if Input is Bootstrapped to a Boosted Output)
- Control Architecture Offers Excellent Performance While Simplifying the Design
- Current-Mode Control
- 300mV, 5% Accurate Current-Limit Threshold Voltage
- Programmable Slope Compensation
- 50% (MAX15004) or Adjustable (MAX15005) Maximum Duty Cycle
- Accurate, Adjustable Switching Frequency and Synchronization Avoids Interference with Sensitive Radio Bands
- Switching Frequency Adjustable from 15kHz to 500kHz (1MHz for the MAX15005A/B)
- RC Programmable 4% Accurate Switching Frequency
- External Frequency Synchronization
- Built-In Protection Capability for Improved System Reliability
- Cycle-by-Cycle and Hiccup Current-Limit Protection
- Overvoltage and Thermal-Shutdown Protection
- -40°C to +125°C Automotive Temperature Range
- AEC-Q100 Qualified
应用
- Automotive
- Isolated Flyback, Forward, Nonisolated SEPIC, Boost Converters
- Vacuum Fluorescent Display (VFD) Power Supply
Functional Diagram
发布日期: 2011-02-14
| 更新日期: 2023-04-21