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The LT3950JMSE is a multi-topology DC/DC converter specifically designed to drive high current LEDs. it contains a 1.5A, 60V DMOS switch and supports an external PWM dimming PMOS. the LT3950JMSE has an internal PWM generator for dimming that maps the analogue control signals to an exponential coordinate system for defining the duty cycle of PWM dimming. Using the exponential coordinate system to define the duty cycle maintains dimming resolution over a wide range of LED currents. In addition to being a constant current source, the LT3950JMSE also provides output voltage regulation. This can be used to prevent damage to components if an open circuit LED event occurs. The programmable switching frequency provides design flexibility to increase efficiency or reduce component size. EMI can be reduced by enabling spread spectrum frequency modulation, and the switching frequency can also be easily synchronised by using an external clock to drive the SYNC/SPRD pins.The LED current can be programmed via a single external sense resistor and can be adjusted from zero to full scale using an analogue signal on the CTRL pin.

Benefits and features

Operates in boost, SEPIC, buck and buck/buck modes

128:1 internal exponential scale PWM dimming

Wide input voltage range (3V to 60V)

1.5A, 60V internal switch

20000:1 100Hz external PWM dimming

±2% LED current and output voltage regulation

PMOS switch driver for PWM dimming

LED short/break protection and indication

Constant voltage and constant current regulation

Adjustable switching frequency from 300kHz to 2MHz

Adjustable PWM generator frequency from 100Hz to 1kHz

Internal Spread Spectrum Frequency (SSFM)

Easy synchronisation to external clock

Programmable VIN UVLO with hysteresis

Available in 16-pin MSOP package

Applications

Display backlighting

Automotive and avionics lighting

• 1.Is the inventory and price seen on the platform accurate?

  A: all online goods on the shelves can be ordered online, but considering the large liquidity of spot inventory, it is not possible to achieve 100% accuracy at present. In case of any abnormality, you can contact our company online and give the corresponding solution.

• 2.Are all our products genuine?

  A: our self-supporting products are from cooperative domestic and foreign original factories or authorized agents, and the source can be traced to ensure the original and authentic products.

• 3.Can you provide the qualification certificate of the original factory or agent?

  A: at present, our self-employed brands TI，ST，ADI，NXP，LATTICE，CYPRESS，INFINEON，XILINX and other first-line brands. Other channels are the original factory and agency channels. If necessary, we can communicate and confirm according to the specific brand and model.

• 4.Can I make an inquiry through the company's website?

  A: You can inquire through the website, or by phone and email.

• 5.When can I deliver the goods after placing an order? How long will it take to get there?

  A: the delivery date is marked in most commodity information. You can estimate the delivery time of the commodity according to the delivery date. The specific arrival time depends on the warehouse where the commodity is located and the logistics mode you choose.

• 6.Can the company issue an invoice?

  A: you can issue ordinary invoices for individual users or special VAT invoices for enterprise users.