Weltrend | Products

AC/DC switching regulators

WT7141BB

The WT7141BB is a high-performance synchronous rectification controller with an integrated 100V MOSFET. It can replace a diode rectifier in a flyback switch mode power supply. Without external auxiliary winding supplies, the WT7141BB can easily provide power to the VDD. It can be powered by D and VD pin. The WT7141BB built-in several circuits to minimize external part counts and overall total system cost.
By sensing the voltage across the conduction resistance of MOSFET, the controller can determine the turn-on/turn-off timing of the internal driver to achieve the lowest loss and high speed sensing. Due to the WT7141BB built-in 100V MOSFET, the WT7141BB is suitable for high output current and wide output voltage range application (e.g., PD3.0 and PPS, from 5V to 21V).

Features

- Secondary side controller optimized for USB PD
- Built-in 100V/10mΩ (Typ.) MOSFET
- Low startup current
- Suitable for flyback CCM/DCM/QR/Valley switching operation
- No need the auxiliary winding
- Unique dynamic DRV control technology for fast turn off
- Outline package (Green Package): SOP-8

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