700 V buck converter with fast start-up is ideal for industrial controls and home appliances
The AL17052 from Diodes Incorporated steps a mains voltage input down to a fixed 5 V output, providing a well regulated supply to devices which require low power consumption in standby mode.
The AL17052 from Diodes Incorporated is a non-isolated buck converter with an integrated 700 V MOSFET which produces a maximum output current of 50 mA at 5 V from a universal mains input-voltage range of 85 V to 300 V ac.
Suitable for the power supply of industrial control systems, IoT devices and home appliances, the converter offers fast start-up in less than 8 ms to give better system response time.
The AL17052 provides outstanding dynamic performance and load regulation without the use of an optocoupler. Low standby power consumption of 10 mW means that the AL17052 can be used in IoT devices which need to maintain always-on connectivity, even when not in active use.
Conversion efficiency is 60% when stepping down a rectified mains voltage to 5 V with the output at 50 mA. Efficiency is 50% with a 10 mA light load.
With an on-chip 700 V MOSFET, the AL17052 enables the development of integrated power supplies with a streamlined bill-of-materials and a small board footprint. The MOSFET operates with a small 330 µH inductor.
Built-in protection features include:
- Over-temperature protection
- Under-voltage lockout
- Over-current protection
- Overload protection