WT7162RH
【 General Description 】 |
The WT7162RH is a high frequency multi-mode (QR/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. The WT7162RH helps to improve the overall efficiency and optimize the product performance. It operates in quasi-resonant (QR) mode during heavy load and operates in discontinuous conduction mode with valley switching during light load. |
The WT7162RH minimizes the components counts and is available in a SOP-10/SOP-08 package. It provides important protection features, such as Brown In/Out, VDD OVP, OLP, OCP and Output Short Circuit Protection. Without an external LDO circuit, the WT7162RH can easily provide 3.3V~21V (7x volts) wide-range output voltage application to effectively reduce total BOM cost. |
【 Features 】 | |
● | 180 kHz Max. Frequency Operation |
● | 600V Ultra HV Start-up Current |
● | Ultra HV Valley Charge Mode (VCM) for Wide Output Voltage Operation (USB PD 3.0 & PPS 3.3V~21V) |
● | Optimized for Wide Output Voltage |
- Adaptive OCP Compensation with Adjustable Line Compensation | |
- Adaptive Green Mode Control | |
- No External VDD Linear Regulator Circuit | |
- Only One VDD Auxiliary Winding | |
● | QR Mode/Valley-Switching Multi-Mode Operation |
● | Built-in X-Cap Discharge Function |
● | Internal Soft-Start Function |
● | Protection: |
- Brown In/Out Protection on HV Pin | |
- Output Over Voltage Protection (VS_OVP) | |
- VDD Over Voltage Protection (VDD_OVP) | |
- Open Loop Protection (OLP) when Feedback Loop Open | |
- Over Current Protection (OCP) | |
- Internal Over Temperature Protection | |
- CS Pin Open/Short Protection | |
● | Green Package: 10-pin/8-pin SOP/td> |
【 Application Circuit 】 |