Solid State LED Drivers

LED Driver Solutions for General Illumination

The adoption of LED as a new light source in general lighting is proving to be a promising but very disruptive approach for the lighting industry.

The industry is quickly embracing the energy savings, light quality and novel features enabled by LED and at the same time is painfully realizing the limitations of conventional ballast and driver solutions originally developed for other light sources with remarkably different electrical, photometric and thermal behavior.

Intelligent and optimized LED drivers and driving systems (that can integrate sensors, color management and the communication interface as necessary) are key to achieving the long life and value promised by LED manufacturers.

Solid State Lighting

Microsemi Portfolio

- Power Supplies

- IC Solutions

Power Factor Correction
LED Drivers
Specialty Functions IC

- Light Sensors

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PORTFOLIO OVERVIEW

Microsemi's unique combination of advanced analog mixed signal capabilities, proven light management and power conversion experience as well as advanced color and digital control IP, supported by a unique and robust supply chain allows us to offer BOTH complete AC/DC modules (power supplies) and ICs to the customers.

MicrosemiSSLDrivers

LX1973Bsml

The end product performance can be further enhanced by the use of our light sensors (visible light or RGB), many outfitted with our BestEye^TM technology to closely match the human eye response to light. With BestEye^TM the fixture can therefore react to light changes and ensure increased power savings and longer LED life only if and when the consumer actually notices a change in ambient light.

Products Categories

LED Driver Modules (Power Supplies) for LED Lighting Fixtures
IC Solutions
Light Sensors

LED Driver Modules (Power Supplies) for LED Lighting Fixtures

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BENEFITS	ITEM	LXMG221W-0700034-D0	LXMG221W-0700034-D1	LXMG221W-0350017-D0	LXMG221D-0700040-D2F
VERSATILITY	Input V Range	100-277V_AC(90-305V_AC)			347-480V_AC
	Output Strings	Single
	Output Current	700mA		350mA	700mA
	Output Voltage	14-48V_DC	20-48V_DC		40-57V_DC
	Max P_OUT	34W		17W	40W
	Package	IP66, Plastic			IP66, Metal
EFFICIENCY	Peak Efficiency	90%	85%	82%	91%
EFFICIENCY	Active Power Factor	>0.9 (0.99@120V)	>0.9 (0.98@120V)	See Datasheet	>0.9
ADDITIONAL SAVINGS OPTIONS	Dimming	0-10V, Pot, PWM	0-10V, Potentiometer		0-10V, Pot, PWM
ADDITIONAL SAVINGS OPTIONS	Minimum Dimming	10%	15%	15%	10%
PROTECTION	Protections	Over Voltage, Over Current, Over Temperature (Automatic Shutoff)
PROTECTION	Fault Management	No			Available!
ADDITIONAL DETAILS	UL1310	Class 2 Isolated Power Supplies, UL1310 E337545
	Status	In full production
	Datasheet	Datasheet	Datasheet	Datasheet	Datasheet

IC Solutions for LED Lighting Fixtures - Power Factor Correction IC

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PART NUMBER	HIGHLIGHTS/BENEFITS	STATUS	MORE INFORMATION
IPS401 Continuous Conduction Mode	- Active power factor correction IC that support a wide variety of single and multi-strings applications - Can be used individually or in combination with a buck stage Features Unique self oscillating operation: the determination of the critical point does not require an auxiliary transformer winding for self oscillation in non-isolated applications (IPS401 only: the switch turn on point is set such that the minimum residual inductor stored energy is a programmable percentage of the peak stored energy) An external voltage regulator is not necessary for the V_CC pin which is maintained at 10V The error amplifier compares feedback to a 0.5V reference allowing direct sensing across a current sense resistor (no amplification of the current sense Voltage is necessary) The BYPASS pin RMS multiplier function normalizes the loop gain independent of VAC RMS voltages. This provides a more stable control loop and better PFC over a wide line voltage range. Over Temperature Protection (150°C)	In production	Datasheet and Application Note
AAL412 Critical Conduction Mode		Sampling	Datasheet and Application Note
AAL412 Critical Conduction Mode		Click for a larger view

IC Solutions for LED Lighting Fixtures - LED Drivers IC

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PART NUMBER	HIGHLIGHTS/BENEFITS	STATUS	MORE INFORMATION
IPS20 and IPS21 V/I Feedback Amplifiers	- Dual Drive of Optocoupler for Isolated Solutions - Usable with Any Primary Side Controller IPS20: integrates a trimmed 50mV reference with a positive temperature coefficient which closely matches that of a PCB copper trace for the most economical implementation IPS21: temperature compensated 100mV reference Features Dual precision regulators for SMPS voltage and current control Output currents up to 50A Output voltage down to 1.2V 50mV or 100mV current sensing voltage 1.20V voltage reference Operates with grounded optocoupler 4V shunt regulator for VCC supply	In Production	Datasheet and Application Note
		Click for a larger view
IPS402 Buck Controller	- Single and Multi-string applications are supported with one IPS401/string (all feedback pins can be tied together) - Proprietary feedback function intended to regulate upstream Bus Voltage - Low power dissipation Features External FET for wider voltage/current applicability External resistor for current-set function Constant current LED operation for maximum LED brightness, maximum life and reliability Feedback function to optimize efficiency in buck applications High-efficiency switch-mode conversion to save power and reduce heat dissipation PWM brightness control	Sampling	Datasheet and Application Note
		Click for a larger view
IPS403 Linear Current Controller	- Single and Multi-string applications are supported with one IPS401/string (all feedback pins can be tied together) - Proprietary feedback function intended to regulate upstream Bus Voltage - Low power dissipation Features Internal FET for simple, compact, low-cost implementation External resistor for current-set function Constant current LED operation for maximum LED brightness, maximum life and reliability Feedback function to optimize efficiency PWM brightness control	Limited Sampling	More Information
		Click for a larger view
AAC242/243 PWM Controllers	- Current Mode PWM Controllers - AAC242 – Offline Level UVLO (16V on/10V off) - AAC243 – Battery Level UVLO (8.4V on/7.6V off) Features Integrated Soft-Start Function (~330 Clock Cycles) I-limit: 0.25Vth ± 3% Accuracy (!!) 100ns Current Blanking for Reduced Filtering on Current Signal 1A/Higher I-drive (Higher Freq Operation)	In Production	Datasheet and Application Note
		Click for a larger view

IC Solutions for LED Lighting Fixtures - Specialty Functions

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PART NUMBER	HIGHLIGHTS/BENEFITS	STATUS	MORE INFORMATION
AAL406 Fault Monitoring and Protection IC	Features Open and Short LED Detection Supports up to 3 LED and can be used in a daisy chain configuration for a higher number of LED Potentially shortens any down and replacement time Compatible with IPS402 and AAL403	In Production	Datasheet
		Click for a larger view

Light Sensors: enhance your energy savings and user experience

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PART NUMBER	Useful Light range (Lux)	Light Output Function	Output Topology	Input Supply Range	output Current a@100Lux	Highlights	Datasheet
LX1970	<1-12K	Linear	Current sink and current source vs. light	2V-5.5	~38μA	General purpose for illumination and display control applications	Datasheet
LX1971	<1-15K	Square Root	Current sink and current source vs. light	3V-5.5	~10μA	Wide dynamic range with extreme sensitivity at low ambient light conditions	Datasheet
LX1972	<1-5K	Linear	Two terminal current source vs. light	2V-5.5V	~10μA	Low cost, small size, high performance sensor with "human eye" response, packaged for top light applications	Datasheet
LX1974	<1-5K	Linear	Two terminal current source vs. light	2V-5.5V	~10μA	Same as LX1972 but packaged for bottom light applications	Datasheet
LX1972A	<1-5K	Linear	Two terminal current source vs. light	2V-5.5V	~10μA	Proprietary BestEye^TM technology provides near perfect immunity to non visible light spectra	Datasheet
LX1973	0.01-500	Quarter Root	Current source vs. light	4.5V-5.5V	380μA	High precision sensor for ultra low light applications with internal dark current cancellation	Datasheet
LX1973A	0.005-500	Quarter Root	Current source vs. light	4.5V-5.5V	360μA	High precision sensor for ultra low light applications with internal dark current cancellation, BestEye^TM	Datasheet
LX1973B	0.005-400	Quarter root	Current source vs. light	4.5V-5.5V	410μA	High precision sensor for ultra low light applications with 60% better dark current cancellation than LX1973A, BestEye^TM	Datasheet
LX1977	0-500 0-100 0-2500 0-500	Linear	Serial data stream using I2C compatible SMBus interface. Programmable interrupt pin support	3.0V-4.5V	N/A	Human eye spectral response, +-/5% accuracy, 12b ADC, 50/60Hz interface rejection, programmable integration time and gain	Datasheet
LX1980	10-1000	RGB Linear	Output voltage for Red, Green, Blue	3.0V-3.6V	N/A	High accuracy maintained over temperature and fast response	Sampling