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