Weltrend | Products

AC/DC switching regulators

WT7161R

The WT7161R 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. The WT7161R helps to improve the overall efficiency and optimize the product performance. It operates in continuous Current Mode (CCM) during heavy load and operates in discontinuous conduction mode with valley switching during light load. The WT7161R minimizes the components counts and is available in a SOP-8 package. It provides important protection features, such as Brown In/Out, Vo UVP, VDD OVP, OLP, OCP and Output Short Circuit Protection. Without an external LDO circuit, the WT7161R can easily provide 3.3V~21V (7x volts) wide-range output voltage application to effectively reduce total BOM cost.

Features

- 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
- 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
- Built-in X-Cap Discharge Function
- Internal Soft-Start Function
- Protection:
- Brown In/Out Protection on HV 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)

- Internal Over Temperature Protection

- CS Pin Open/Short Protection
- Green Package: 8-pin SOP

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