The NCL30488 is a power factor corrected flyback controller

targeting isolated constant current LED drivers. The controller

operates in a quasi−resonant mode to provide high efficiency. Thanks

to a novel control method, the device is able to tightly regulate a

constant LED current from the primary side. This removes the need

for secondary side feedback circuitry, its biasing and for an

optocoupler.

The device is highly integrated with a minimum number of external

components. A robust suite of safety protection is built in to simplify

the design.

Features

• High Voltage Startup

• Quasi−resonant Peak Current−mode Control Operation

• Primary Side Feedback

• CC / CV Accurate Control Vin up to 320 V rms

• Tight LED Constant Current Regulation of ±2 Typical

• Digital Power Factor Correction

• Analog and Digital Dimming

• Cycle by Cycle Peak Current Limit

• Wide Operating VCC Range

• −40 to + 125°C

• Robust Protection Features

♦ Brown−Out

♦ OVP on VCC

♦ Constant Voltage / LED Open Circuit Protection

♦ Winding Short Circuit Protection

♦ Secondary Diode Short Protection

♦ Output Short Circuit Protection

♦ Thermal Shutdown

♦ Line over Voltage Protection

• This is a Pb−Free Device

Typical Applications

• Integral LED Bulbs

• LED Power Driver Supplies

• LED Light Engines