LT3517EUF#TRPBF

LT3517 is a current mode DC/DC converter with an internal 1.5A, 45V switch specifically designed to drive LEDs. This device operates as a LED driver in boost, buck mode and buck-boost mode. It combines a traditional voltage loop and a unique current loop to operate as a constant-current source or constant-voltage source. Programmable switching frequency allows optimization of the external components for efficiency or component size. The switching frequency of LT3517 can be synchronized to an external clock signal. The LED current is externally programmable with a 100mV sense resistor. The external PWM input provides up to 5000:1 LED dimming. The CTRL pin provides further 10:1 dimming ratio. It is used in application such as display backlighting, automotive and avionic lighting, illumination, scanners etc.

• Open LED protection, gate driver for PMOS LED disconnect
• Switching frequency is 1MHz typical at (RT = 16.7K)
• Wide input voltage range is 3V to 30V, transient protection to 40V
• Gate driver for PMOS LED disconnect
• Constant-current and constant-voltage regulation
• Low shutdown current is 1µA maximum
• Maximum duty cycle is 97% typical at (RT = 91.5K, 250KHz)
• Switch current limit is 1.9A, switch VCESAT is 300mV typical at (SW = 1A)
• Operating temperature is -40°C to 125°C
• Package style is 16-lead plastic QFN

Notes

ADI products are only authorized (and sold) for use by the customer and are not to be resold or otherwise passed on to any third party