Summary:
The TPS55010 is a transformer driver designed to provide isolated power to isolated interfaces such as RS-485 and RS-232 with a 3.3V or 5V input supply.
The device uses fixed frequency current mode control and a half-bridge power stage with primary side feedback to regulate the output voltage for the 2W power level. The switching frequency can be adjusted from 100 kHz to 2000 kHz, thus finding the best balance between size, efficiency and noise specifications. The switching frequency is set with a resistor or synchronized to an external clock using the RT/CLK pin. To minimize inrush current, connect a small capacitor to the SS pin. The EN pin is used as an enable pin or to increase the default input UVLO voltage (starting at 2.6V).
Device characteristics
Isolated Fly-Buck? topology
Primary side feedback
100 kHz to 2000 kHz switching frequency
Sync to external clock
Adjustable slow start
Adjustable input voltage UVLO
Open drain fault output
Cycle-by-cycle current limit
With thermal shutdown protection
3mm x 3mm 16-pin QFN package
Device application
Provides noise immunity in PLC, data acquisition and measurement equipment
Isolated RS-232 and RS-485 communication channels
Power line driver, ISO amplifier, sensor, CAN transceiver
Floating power supply for IGBT gate drivers
Improve the safety of medical equipment
TPS55010 pin structure
TPS55010 internal structure block diagram
TPS55010 typical application circuit
Reference materials:
1.TPS55010 data sheet can be found in the PDF document (click on the PDF file to download)
2. Learn electronic components from scratch: http://
3. For the content of related electronic components, please refer to: http://
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