AC/DC LED Driver IC targets general lighting applications.

Press Release Summary:

With operating voltage from 85–265 Vac, PFC greater than 0.95, and current accuracy of ±3%, Model IS31LT3916 is suited for lighting fixture designs which meet UL compliance for galvanic isolation. Fixed-frequency, peak current mode controller delivers accurate current regulation at constant power to LED load. Housed in RoHS-compliant MSOP-8 package, device includes soft-start, Vcc undervoltage lockout with hysteresis, and protections against output over-voltage, output open, and short circuit.

Original Press Release:

ISSI Expands LED Driver Family with AC/DC LED Driver IC for General Lighting Applications

Integrated Active Power Factor and Primary Side Sensing Minimize BOM for Smallest Form Factor in Bulb Retrofits, T8 and PAR Designs

SAN JOSE, Calif. -- Integrated Silicon Solution, Inc. (Nasdaq:ISSI), a leader in advanced memory and analog IC solutions, today introduced the IS31LT3916 a high performance LED driver for solid-state lighting (SSL) applications. With an input operating voltage range from 85 to 265VAC, a Power Factor Correction greater than 0.95 and a typical current accuracy of +/-3%, the IS31LT3916 is ideally suited for isolated lighting fixture designs which meet UL compliance for galvanic isolation.

The IS31LT3916 is a fixed-frequency, peak current mode controller designed to deliver highly accurate current regulation at a constant power to the LED load. Designs utilizing this device will maintain current accuracy without any type of secondary side feedback such as an opto-coupler while being insensitive to external component tolerances. The device has an automatic correction for peak current threshold that keeps the current constant with varying line voltage while maintaining high power factor. In addition, the IS31LT3916 LED driver incorporates many features such as soft-start, Vcc undervoltage lockout with hysteresis, and protections against output over-voltage, output open and short circuit, primary side over-current and thermal shutdown with hysteresis enabling a robust and reliable system solution.

Industry analysts expect 2013 to be a pivotal year as LED lighting adoption gains momentum in general lighting applications. With environmental regulations worldwide limiting high power incandescent use, LEDs offer an alternative solution which is becoming attractive as SSL solution costs decline rapidly. ISSI continues to expand its LED Driver offerings with innovative and cost effective solutions to address the gamut of indoor and outdoor lighting applications. "IS31LT3916 extends our LED Driver offering for general lighting applications," remarked Ven Shan, ISSI VP of Analog products. "Lighting manufacturers will find this driver to be highly flexible and yet cost effective as it can be tailored to either isolated or non isolated designs with reduced part count and small form factor for reliable LED lighting solutions."

Price and Availability

The IS31LT3916 is available now in a space saving, RoHS compliant MSOP-8 package and is priced at $0.89 in 1,000 piece quantities. For more information on this and other HBLED products visit the ISSI Analog products website

ISSI High Brightness(HB) LED Product Line

ISSI's HBLED product line offers a broad variety of devices for most types of SSL, including MR-16, GU-10, PAR, Bulb, Street lamps, Emergency lighting, and etc. Devices operate from Battery voltage, low voltage AC or DC, as well as AC line input voltage. The HBLED product line is geared towards simplifying the application circuit for ease of use, as well as expediting our customer's time to market.

About ISSI

ISSI is a fabless semiconductor company that designs and markets high performance integrated circuits for the following key markets: (i) automotive, (ii) communications, (iii) industrial, medical, and military, and (iv) digital consumer. The Company's primary products are high speed and low power SRAM and low and medium density DRAM. The Company also designs and markets NOR flash products and high performance analog and mixed signal integrated circuits. ISSI is headquartered in Silicon Valley with worldwide offices in Taiwan, Japan, Singapore, China, Europe, Hong Kong, India, and Korea. Visit our web site at


Integrated Silicon Solution, Inc.

 Ven Shan 408.969.4622


Aaron Reynoso 408.969.5141

Tom Doczy 408-969-4620

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