The NCL30080 is a PWM current mode controller targeting isolated flyback and non−isolated constant current topologies. The controller operates in a quasi−resonant mode to provide high efficiency. Thanks to a novel control method, the device is able to precisely regulate a constant LED current from the primary side. This removes the need for secondary side feedback circuitry, biasing and an optocoupler. The device is highly integrated with a minimum number of external components. A wide VCC range simplifies the design process and allows a single design to support a wide LED forward voltage range. A robust suite of safety protection is built in to simplify the design. This device is specifically intended for very compact space efficient designs

FEATUREs
• Quasi−resonant Peak Current−mode Control Operation
• Primary Side Sensing (no optocoupler needed)
• Wide VCC Range
• Precise LED Constant Current Regulation ±1% Typical
• Line Feed−forward for Enhanced Regulation Accuracy
• Low LED Current Ripple
• 250 mV ±2% Guaranteed Voltage Reference for Current Regulation
• ~ 0.9 Power Factor with Valley Fill Input Stage
• Low LED Current Ripple
• Source 300 mA / Sink 500 mA Totem Pole Driver with 12 V Gate
Clamp
• Low Start−up Current (13 A typ.)
• Small Space Saving Low Profile Package
• Wide Temperature Range of −40 to +125°C
• Pb−free, Halide−free MSL1 Product
• Robust Protection Features
   ♦ Over Voltage / LED Open Circuit Protection
   ♦ Secondary Diode Short Protection
   ♦ Output Short Circuit Protection
   ♦ Shorted Current Sense Pin Fault Detection
   ♦ Latched and Auto−recoverable Versions
   ♦ Brown−out
   ♦ VCC Under Voltage Lockout
   ♦ Thermal Shutdown

Typical Applications
• Integral LED Bulbs
• LED Power Driver Supplies
• LED Light Engines