LingLiEr company (Linear 80V) launched Corporation beaver voltage DC/DC side current detection, this device for LT3956 converter constant current and voltage as constant voltage and design work. It is very suitable for large current drive leds and battery charging and super capacitors. Its 4.5 V input voltage range 80V - which is suitable for a wide variety of applications, including automotive, industrial and building lighting. Using an internal LT3956 channel mosfets, can from N nominal values for 12V input drive up to 18 350mA white leds, providing more than 25W's power. It adopts high voltage side current detection, allowing the use of booster, step-down, step-down - or SEPIC and boost flyback type topology. LT3956 pressor mode in provide more than 94% of external thermal efficiency, thus no measures. A frequency adjust pin allows users to set limits on 100 KHZ 1MHz frequency, and optimize the maximum efficiency, reduce the size of the external components and cost. Combining QFN 5mm 6mm x LT3956 encapsulation, provide a highly compact 25W LED drive solutions.

LT3956 adopted PWM (True Color really colour PWM)? Light up to 3,000:1, dimming range providing a constant LED colors. Requires less demanding dimmer demand, CTRL pin the simulation experimental provide dimming range. LT3956 fixed frequency, the current mode framework in width and power to ensure stable output voltage range. A benchmark for the FB foot as the voltage protection function of several leds, which makes the converter input to a constant voltage source.

LT3956EUHE by 36 pin QFN 5mm 6mm x 1000 pieces, for the unit price of each batch purchase, for $3.50. Expand the temperature level I LT3956IUHE version for $4.12 购价 batch thousand pieces. Both versions are cash supply. If you need more information, please login www.elsung.com. Cn/pr/sit.

Photo shows: the voltage/current 80V, constant converter

Summary: LT3956 performance

3000:1 True Color PWM dimmer

Wide input voltage range: 80V to 4.5 V

Output voltage 80V up

A 3.3 84V switch inside

Constant current and constant voltage regulation

250mV pressure side current detection

To boost, step-down, step-down - SEPIC pressor, or flyback type topological drive leds

Adjustable frequency: 100 KHZ to 1MHz

Leds open protection

With hysteresis programmable undervoltage atresia

Constant voltage loop state pin

Cut the drive PWM

CTRL pin adjusting voltage side current detection threshold

Low downtime current: < 1uA

Programmable soft start-up

Using 36 lead (x) 5mm 6mm QFN encapsulation