Weltrend | Products

AC/DC switching regulators

WT7165

The WT7165 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 WT7165 has a deep burst mode to reduce no-load power consumption. Working with Weltrend’s USB PD controller, the WT7165 can achieve no-load power consumption of less than 20mW on a 65W USB PD adapter when the USB-C cable is detached. The WT7165 also 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 (DCM) with valley switching during light load. The WT7165 minimizes the external components and is available in a SOP-8 package. It provides important protection features, such as Brown In/Out, AC_OVP, VDD OVP, OTP, OLP, OCP and Output Short Circuit Protection. Without an external LDO circuit, the WT7165 can easily provide 5V to 21V wide-range output voltage application to effectively reduce total BOM cost.

Features

- Deep Burst Mode for No Load < 20mW@230Vac
- 700V Ultra HV Start-up Current
- Peak Load Frequency Boost (130 kHz)
- Optimized for Wide Output Voltage
- Wide VDD Range: 7V to 85V

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

- AC Input Over Voltage Protection on HV Pin (AC_OVP)

- Output Over Voltage Protection (VS_OVP)

- VDD Over Voltage Protection (VDD_OVP)

- Open Loop Protection (OLP) when Feedback Loop Open

- Two Level Over Current Protection (OCP)

- External Over Temperature Protection Through a NTC on CS Pin (CS_OTP)

- Output Rectifier Short Protection

- Internal Over Temperature Protection

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

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