60V buck LED driver consists of 3 independent LED strings composed of 100mA LED and provides 10000:1 True Color dimming

(Linear Technology Corporation) technology company launched 60V, 1MHz, Buck DC/DC converter LT3597, this device is designed as 3 channel constant current LED driver work. Each channel of the LT3597 contains a constant current LED driver and dedicated adaptive output buck converter. This design provides the highest efficiency for applications such as RGB displays, where each LED string requires different output voltages. In the 48V input, the LT3597 can drive up to 3 LED strings (each string consisting of up to 10 100mA LED Series), providing over 90% efficiency. The multi-channel capability of LT3597 makes it ideal for large LED billboard backlighting, and is also suitable for industrial, automotive and medical displays. Similarly, the 6V to 60V input voltage range makes the device very suitable for industrial, automotive and medical applications. Each LED string can be set independently to provide up to 100mA of the LED current, with a + 2% current matching accuracy between LED strings. In addition, each channel can be used True Color PWM dimming mode independent dimming, providing up to 10000:1 dimming ratio. The programmable fixed frequency operation of 200kHz to 1MHz and the current mode architecture ensure stable operation over a wide range of power supply and output voltages, thereby minimizing the size of external components. In addition, the switching frequency can be synchronized to an external clock. LT3597 using thermally enhanced 5mm x 8mm QFN package, can be composed of solution extremely compact footprint for LED lighting applications. The LT3597 uses 3 separate 400mA, 60V internal switches to provide a step-down constant current source. The internal buck converter uses an adaptive feedback loop to adjust the output voltage to slightly higher than the desired LED voltage to ensure maximum efficiency. If any string of LED has an open circuit or a short circuit fault, the LT3597 continues to regulate the other LED strings and sends a signal to the FAULT pin. Other features include day temperature and / or LED temperature LED based on current derating and when in shutdown LED. LT3597EUHG 5mm x 8mm with 39 lead QFN package. To buy 1000 units in bulk, each price of $3.95. Industrial grade version of LT3597IUHG after the test, to ensure the working temperature range of -40 DEG C to 125 DEG C, 1000 purchase price of $4.54 per piece. All versions are available from stock.

Photo Description: with 10000:1 True PWM dimming 60V buck 3 channel LED driver for Color

Performance overview: LT3597 3 100mA buck regulator, each with fast NPN current source to drive up to 10 LED fast current source