Milpitas, CA – December 9, 2015 – Linear Technology CorporaTIon introduces the LT3965 LED Bypass Switching Device, which allows independent of 8 individual LEDs or LED segments Dimming and diagnosis. The LT3965 operates with an LED driver circuit configured as a current source. The LT3965 has eight individually controlled floating 17V/330m? NMOS switches. With these internal power switches and an integrated I2C serial interface, each LED in the LED string can be individually turned on or off, or they can be PWM dimmed to provide a unique illumination pattern for the LED matrix. Typical applications include automotive matrix LED headlights, industrial lighting, and large LED display lighting. Digital programming with a 256:1 dimming ratio via the I2C serial interface allows for a gradual transition with or without 11-bit resolution between dimming states. Each switch can control and monitor a single LED or a segment of LED connected in series with a voltage of up to 16V. The LT3965's 8V to 60V input voltage range is suitable for a wide range of LED drivers used in automotive and industrial applications. For larger LED matrix applications, multiple LT3965s (up to 16) can use a common I2C bus. The eight switches of the LT3965 can be connected in parallel and/or in series to bypass one or more LEDs in the LED string. When using multiple LT3965s, the I2C serial interface allows the primary microcontroller to communicate with one or more LT3965s configured as slaves. The LT3965 provides an internal clock generator and also supports an external clock source for PWM dimming. In addition, each channel of the LT3965 provides open LED and shorted LED fault reporting and protection. The device is packaged in a 28-lead TSSOP heat-resistant enhancement package to ensure a compact footprint solution for matrix dimming applications. The LT3965EFE is available in a thermally enhanced 28-lead TSSOP package. The industrial temperature version LT3965IFE has been tested to operate over the –40°C to 125°C operating junction temperature range. The 1,000-piece purchase price is $3.95 per piece, both versions are available from stock. Photo caption: 8 switch LED matrix dimmer Performance Summary: LT3965 · 8 independent 17V 330m? NMOS switches · Each switch independently performs on/off/dimming control · I2C serial interface with open LED and shorted LED fault reporting · Programmable I2C address · VDD range: 2.7V to 5.5V; VIN range: 8V to 60V Digitally programmable 256:1 PWM dimming · Gradient transition between PWM dimming states · Optional internal clock generator or external clock source for PWM dimming · Switch with limited conversion rate to reduce noise · Open circuit LED overvoltage protection · Programmable open LED and shorted LED threshold · 28 Lead Thermally Enhanced TSSOP Package The US quotes given in this article are for budgetary purposes only. Quotations around the country may vary depending on local tariffs, taxes, fees and exchange rates. Linear Technology Company Profile Linear Technology CorporaTIon is a member of the S&P 500 Index and has been designing, manufacturing and selling a wide range of high performance analog integrated circuits for major companies worldwide for more than 30 years. Linear Technology's products form an indispensable bridge between the analog world and digital electronics in our applications, including communications, networking, industrial, automotive, computer, medical, instrumentation, consumer, and military and aerospace systems. . Linear Technology manufactures power management, data conversion, signal conditioning, RF and interface ICs, μModuleÒ subsystems, and wireless sensor networking products.
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