Compared to alternative resistor dependent solutions, the MOSFET based approach is said to improve system efficiency and reduce start-up time.
To maximise resistance to high voltage creepage, the MOSFET is provided in a unique 4-pinned SOT223-package. By simply disconnecting one of the two conventional drain pin positions, the device’s new leadframe design significantly extends inter-pin spacing, which helps designers comply with UL and CE creepage distance specifications.
Characterised by low on resistance – a maximum of 50? – and supporting continuous drain currents up to 140mA, and pulsed currents of 600mA, the transistor offers a highly efficient power handling capability. Switching speed is also fast, with turn-on and rise times specified at 7ns.
