onsemi NCL30082ADMR2G

The NCL30082 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 robust suite of safety protection is built in to simplify the design. This device supports analog/digital dimming as well as thermal current fold−back. While the NCL30082 has integrated fixed overvoltage protection, the designer has the flexibility to program a lower OVP level.

• Quasi−resonant Peak Current−mode Control Operation
• Primary Side Sensing (no optocoupler needed)
• Wide V_CC Range
• Source 300 mA / Sink 500 mA Totem Pole Driver with 12 V Gate Clamp
• 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 Start−up Current 13 μA typ.
• Analog or Digital Dimming
• Thermal Fold−back
• Wide Temperature Range of -40 to +125 ℃
• Pb−Free, Halide−Free MSL1 Product
• Robust Protection Features
  • Over Voltage / LED Open Circuit Protection
  • Over Temperature Protection
  • Secondary Diode Short Protection
  • Output Short Circuit Protection
  • Shorted Current Sense Pin Fault Detection
  • Latched and Auto−recoverable Versions
  • Brown−out
  • V_CC Under Voltage Lockout
  • Thermal Shutdown

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