DESCRIPTION

JW1779 is a non-isolated, constant output current

step-down LED driver with 500V MOSFET

integrated. Operating in the boundary mode

makes it high efficiency and low radiation.

Patented algorithms ensure good current

accuracy and excellent line/load regulations with

lowest BOM cost.

JW1779 is supplied from the MOSFET drain

directly, so the auxiliary winding is eliminated,

which can light up the LED within 100mS.

With unique sampling techniques, JW1779 has

multi-protection functions which can largely

enhance the safety and reliability of the system,

including VDD UVLO, inductor short protection,

LED short protection and over-temperature

protection.

FEATURES

Integrate 500V, Low Rdson MOSFET

30Ohm,100mA maximum output current

Excellent line/load regulation

Boundary mode operation

High efficiency

LED SCP

VDD UVLO

Over-temperature protection

Brown Out Protection

Inductor short protection

TO-92 package

APPLICATIONS

LED lighting