LT3755IUD#PBF

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The LT3755IUD#PBF is a high power, Integrated-Driver (ID) designed for multiple LEDs with up to four strings and a maximum current of 8A per string. It is the most versatile driver on the market. It combines very high current capabilities that can support up to 32 strings of LEDs with very low thermal resistance to achieve a wide output power range. The LT3755IUS#PBF is a single-string, integrated, high power LED driver, capable of driving up to 8A of constant current. It provides up to 30A of peak current and 4A of combined output current. It is one of the most versatile LED drivers on the market and is suitable for a wide range of LED applications.

The LT3755IUD#PBF is ideal for lighting applications like LED street lighting, industrial, and architectural lighting. It integrates a high-voltage buck converter, linear constant current driver, protection circuits, error amplifier, PWM dimming circuitry and a SW pin to enable dimming control. It maximizes efficiency up to 95%, and requires very few external components. It features a wide input voltage range of 4.5V to 42V and wide temperature operating range of −40°C to 125°C.

The LT3755IUD#PBF achieves optimal thermal performance while reducing components and board space. It features low power loss, minimal ZVS inductor ripple current, and wide dimming range with digital dimming control. It has high power efficiency up to 95%, high PWM dimming frequency up to 500 kHz, and a wide range of dimmable outputs. The LT3755IUD#PBF is also capable of rejecting maximum power point tracking (MPPT), allowing its usage for high power applications. The device is fully digital and does not require any external components for programming.

The LT3755IUS#PBF consists of a high power switching controller and a current sense amplifier. The current sense amplifier senses the output current from the switching controller and regulates its voltage. The switching controller adjusts the current output by controlling the switch on times and off times of the external power MOSFETs. The high power switching controller and the current sense amplifier are interconnected and synchronized, enabling the current control and dimming functions of the device.

The LT3755IUS#PBF has a 0.5V reference voltage and a wide dimming range with a dimming resolution of 0.5V to 42V. The device also provides bootstrap current with peak current limit and a soft-start function. It can be programmed to operate in low-power mode to reduce quiescent current consumption. The device also features a flexible current stabilization circuit that increases the current accuracy and reduces the line regulation of the device. It also features a burst mode operation, which reduces current consumption and improves the efficiency of the device.

In summary, the LT3755IUD#PBF is a high performance, integrated-driver designed for multiple-LED applications with a maximum current of 8A per string. It is suitable for lighting applications like LED street lighting, industrial, and architectural lighting. The device features low power loss, minimal ZVS inductor ripple current, and wide dimming range with digital dimming control. It provides up to 30A of peak current and can achieve power efficiencies up to 95%. It is a flexible, efficient and versatile device for high-power LED applications.

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