Onsemi NCL30082

Description

The NCL30082 is a PWM current mode controller targeting isolatedflyback and non−isolated constant current topologies. The controlleroperates in a quasi−resonant mode to provide high efficiency. Thanksto a novel control method, the device is able to precisely regulate aconstant LED current from the primary side. This removes the needfor secondary side feedback circuitry, biasing and an optocoupler.The device is highly integrated with a minimum number of externalcomponents. A robust suite of safety protection is built in to simplifythe design. This device supports analog/digital dimming as well asthermal current fold−back. While the NCL30082 has integrated fixedovervoltage protection, the designer has the flexibility to program alower OVP level.

Features

• Quasi−resonant Peak Current

−mode Control Operation

• Primary Side Sensing (no optocoupler needed)
• Wide VCC Range
• Source 300 mA / Sink 500 mA Totem Pole Driver with 12 V GateClamp
• 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 A typ.)
• Analog or Digital Dimming
• Thermal Fold−back
• Wide Temperature Range of −40 to +125°C
• Pb−free, Halide−free MSL1 Product
• 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
• VCC Under Voltage Lockout
• Thermal Shutdown

Typical applications

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

More information

• Datasheet
• IC product information