Linear release 36V, 2.2MHz buck LED driver LT3592

Linear Technology Corporation (Linear Technology Corporation) launched 36V DC/DC buck converter LT3592 is used as a constant current LED driver. Its internal 36V, 900mA switch allows the device to be driven from the 36V input by a single LED string consisting of up to 6 500mA white LED, suitable for industrial and LED marking applications. It can also use 12V lead-acid battery input to drive two 500mA LED, suitable for automotive applications.

LED series connection can make the current of the LED the same, so as to achieve the same brightness and no ballast resistance. The switching frequency of LT3592 can be adjusted in the range of 400kHz to 2.2MHz by a single resistor. This allows the designer to set the switching frequency higher than the critical frequency band (e.g. AM radio) while minimizing the size of external components. LT3592 uses 2mm x 3mm DFN-10 or MSOP-10 package, can form a very compact 500mA LED driver solution.

By driving the LT3592 pin of the BRIGHT, the current value of the LED can be selected as 10% or 100% of the programmed value. LT3592 uses a fixed frequency, high voltage side detection, as well as the realization of fast transient response and cycle by cycle current mode architecture. Other features include: short circuit and open circuit LED protection, single line LED function and thermal shutdown.

2mm x DFN-10 or MSOP-10E packages are available in both LT3592EDDB and LT3592EMSE are available in stock, in order to buy 1000 units in bulk, each price of $1.65 and $1.75, respectively. The application requires a wide temperature range for the I Version (LT3592IDDB and LT3592IMSE) also have the cash supply, purchase price thousand pieces were $1.90 and $2.01 per piece.

Performance overview: LT3592

Wide input voltage range: 3.6V to 36V range

Resistance adjustable 400kHz to 2.2MHz switching frequency

Short circuit and open circuit LED protection

Internal switch current sense resistor

10:1 programming with an external resistor to the LED current through the pin select ratio

50mA/500mA LED current setting

Small heat resistant enhanced 10 lead DFN (2mm x 3msm) and MSOP-10 package

2mm x 3mm package using 36V, 500mA buck mode LED driver DFN

Source: Electronic Engineering album