NCL30081ASNT1G ON Semiconductor

NCL30081 Dimmable Quasi-Resonant Primary Side Current-Mode Controller for LED Lighting The NCL30081 is a PWM current mode controller targeting isolated flyback and nonisolated constant current topologies. The controller www.onsemi.com operates in a quasiresonant 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. 1 The device is highly integrated with a minimum number of external TSOP6 components. A robust suite of safety protection is built in to simplify SN SUFFIX CASE 318G the design. This device is specifically intended for very compact space efficient designs. It supports step dimming by monitoring the AC line and detecting when the line has been toggled onoffon by the user to MARKING DIAGRAM reduce the light intensity in 5 steps down to 5% dimming. Features AAxAYW Quasiresonant Peak Currentmode Control Operation Primary Side Sensing (no optocoupler needed) 1 Wide V Range CC AAx = Specific Device Code Precise LED Constant Current Regulation 1% Typical x = G or H Line Feedforward for Enhanced Regulation Accuracy A = Assembly Location Y = Year Low LED Current Ripple W = Work Week 250 mV 2% Guaranteed Voltage Reference for Current Regulation = PbFree Package ~ 0.9 Power Factor with Valley Fill Input Stage (Note: Microdot may be in either location) Low Startup Current (10 A typ.) Small Space Saving Low Profile Package PIN CONNECTIONS 5 State Quasilog Dimmable 1 Wide Temperature Range of 40 to +125C ZCD VIN Pbfree, Halidefree MSL1 Product GND VCC Robust Protection Features CS DRV Over Voltage / LED Open Circuit Protection (Top View) Secondary Diode Short Protection Output Short Circuit Protection Shorted Current Sense Pin Fault Detection Typical Applications Latched and Autorecoverable Versions Integral LED Bulbs Brownout LED Power Driver Supplies V Under Voltage Lockout CC Thermal Shutdown LED Light Engines ORDERING INFORMATION See detailed ordering and shipping information in the package dimensions section on page 30 of this data sheet. Semiconductor Components Industries, LLC, 2015 1 Publication Order Number: January, 2015 Rev. 1 NCL30081/DNCL30081 Aux . 1 6 2 5 34 Figure 1. Typical Application Schematic for NCL30081 Table 1. PIN FUNCTION DESCRIPTION Pin No Pin Name Function Pin Description 1 ZCD Zero Crossing Detection Connected to the auxiliary winding, this pin detects the core reset event. 2 GND The controller ground 3 CS Current sense This pin monitors the primary peak current 4 DRV Driver output The current capability of the totem pole gate drive (+0.3/0.5 A) makes it suit- able to effectively drive a broad range of power MOSFETs. 5 VCC Supplies the controller This pin is connected to an external auxiliary voltage. 6 VIN Input voltage sensing This pin observes the HV rail and is used in valley selection. This pin also BrownOut monitors and protects for low mains conditions. www.onsemi.com 2