WT7180数据手册Weltrend中文资料规格书

描述 Description

The WT7180 is a high performance multi-mode (CCM/Valley Switching) Flyback PWM controller. It is specifically designed to work with USB PD controller to provide a total solution for USB PD or a programmable power adapter. It minimizes the components counts and is available in a tiny SOT-26 package. The controller operates in Continuous Current Mode (CCM) during heavy load and operates in discontinuous conduction mode with valley switching during light load. The WT7180 helps to improve the overall efficiency and optimize the product performance. The controller provides with important protection features, such as DC Brown In/Out, Vo UVP, VDD OVP, OTP, OLP, OCP and Output Short Circuit Protection.

特性 Features

●Ultra-low Start-up current (1.5uA Typ.)
●Optimized for Wide Output Voltage Operation (USB PD 2.0 & PD 3.0V)
 - Wide VDD Range: 7.5V to 66V (Typ.)
 - Adaptive OCP Compensation with Adjustable Line Compensation
 - Adaptive Green Mode Control
 - No External VDD Linear Regulator Circuit
 - Only One VDD Auxiliary Winding
●CCM/DCM/Valley-Switching Multi-Mode Operation
●DRV pin with Soft Driver to Reduce EMI Noise
●Internal Soft-Start Function
●Protection:
 - DC Brown In/Out Protection on VS Pin
 - Output Under Voltage Protection (VS_UVP)
 - Output Over Voltage Protection (VS_OVP)
 - VDD Over Voltage Protection (VDD_OVP)
 - Open Loop Protection (OLP) when Feedback Loop Open
 - Over Current Protection (OCP)
 - External Over Temperature Protection Through a NTC (VS_OTP)
 - Internal Over Temperature Protection
 - CS Pin Open/Short Protection
 - Output Rectifier Short Protection
●Package: SOP-26