LD5525中文资料AC-DC控制器 : 隔离式低压启动控制/驱动器数据手册Leadtrend规格书

描述 Description

In order to enhance the efficiency performance, the LD5525 integrates the multi-mode PWM controller, which consists of Quasi-Resonant (QR) PWM control for light load condition and Continue Conduction Mode (CCM) for heavy load condition.Moreover, the QR controller not only gains the system performance, but also brings the worse EMI capability, while the frequency swapping function of LD5525 can reduce the EMI emission of SMPS and helps the power circuit designers to simply deal with EMI filter and saves several component and developing time.The LD5525 is implemented in SOT-26 package, and includes the comprehensive protection function, such as Over Load Protection (OLP), Over Voltage Protection (OVP), Output Short Circuit Protection (OSCP) and internal Over Temperature Protection (OTP). Furthermore, the programmable Brown-in/out Protection is built-in.

特性 Features

·Secondary-side feedback control with quasi-resonant operation
·Low Startup Current (<3μA)
·0.5mA Ultra-low operating current at light load
·Current Mode Control with Cycle-by-Cycle Current Limit
·Green Mode Control
·UVLO (Under Voltage Lockout)
·LEB (Leading-Edge Blanking) on CS Pin
·VCC OVP (Over Voltage Protection)
·Adj. OVP (Over Voltage Protection) on FB pin.
·Adj. UVP (Under Voltage Protection) on FB pin.
·Adjustable Brown in/out on FB pin.
·OLP (Over Load Protection)
·External OTP (Over Temperature Protection) on CS Pin
·Internal OTP (Over Temperature Protection)
·Gate Source/Sink Capability: 250mA/-500mA

应用 Application

·Switching AC/DC Adaptor