NCP12700数据手册集成电路（IC）的ACDC转换器离线开关规格书PDF

描述 Description

The NCP12700 is a fixed frequency, peak current mode, PWM controller containing all of the features necessary for implementing single-ended power converter topologies. The device features a high voltage startup capable of operating over a wide input range(9 – 120/200 V MSOP10/WQFN10) and supplying at least 20 mA to provide temporary bias to VCC during system startup.
The controller offers an adjustable soft-start, input voltage UVLO protection, and an adjustable Over-Power Protection circuit which limits the total power capability of the circuit as the input voltage increases, easing the system thermal design. The UVLO pin also features a shutdown comparator which allows for an external signal to disable switching and bring the controller into a low quiescent state.

特性 Features

• Wide Input Range (9 – 120/200 V; MSOP10/WQFN10)
• Simplify design and reduce BOM cost
• Current Mode Control with Integrated Slope Compensation
• No sub-harmonic oscillation in CCM mode .
• Single Resistor Programmable Oscillator
• Easy and flexible
• 1 A / 2.8 A Source / Sink Gate Driver
• Drive any type of MOSFET's
• Input Voltage UVLO with Hysteresis
• To protect the design or bring the controller into a low quiescent state
• Several Fault Protections:- User Adjustable Over-Power Protection- Overload Protection with 30 ms Overload Timer- NTC-Compatible Fault Interface for Thermal Protection- Output OVP Fault Interface
• Robust and safe design

应用 Application

• Low to medium voltage isolated DC-DC
• CCM & DCM Flyback Converters
• Forward converters
• Telecom DC-DC Modules
• Industrial power converters
• Railway DC-DC Modules

简介

NCP12700属于集成电路（IC）的ACDC转换器离线开关。由制造生产的NCP12700AC DC 转换器，离线开关该系列是元器件级控制产品，用于构建将交流市电转换为直流电（通常电压大幅降低）的设备。集成和未集成系统主要开关元件的器件均包括在内。由于高输入输出电压比，以及此类系统中通常需要隔离，这些器件通常与外部变压器配合使用。尽管通常使用定制变压器来实现此用途，但也有许多专门用于此用途的库存产品，请参见“开关转换器，SMPS 变压器”标题。