LT3474IFE-1#PBF

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LT3474IFE-1#PBF is an advanced power management integrated circuit (PMIC) which combines a highly efficient step-up DC-DC converter with an adjustable current limit switch and a fixed frequency high-side switch. It is available in an ultra-compact 14-lead TDFN package. This PMIC - LED Driver is aimed at providing designers a simple and easy to use device to power up LEDs. It has been designed to operate with small capacitors and inductors, resulting in a smaller, less expensive and more efficient solution than traditional discrete implementations.

The LT3474IFE-1#PBF is a current-mode boost converter with a wide input voltage range of 1.8V to 40V. It can support up to 4 LEDs in series at a constant current from 15mA up to 1A. It utilizes peak-current-mode control for maximum control loop stability. At the same time, it can provide a regulated output voltage from 0.3V up to 28V, depending on the inductor. The device is designed to draw only 2.5µA of quiescent current in shutdown mode.

The LT3474IFE-1#PBF supports several operating modes such as Constant On-Time (COT) mode, Pulse-Width Modulation (PWM) mode, and direct-external control mode. The device provides a wide PWM frequency range from 500kHz to 60kHz, allowing designers to customize it to their desired application requirements. Additionally, it operates in CC-CV (constant current/constant voltage) mode where the inductor current is regulated to a preset level as long as the output voltage is below the preset limit.

The LT3474IFE-1#PBF also features a programmable under-voltage lockout (UVLO) function, a 0.5% feedback voltage accuracy, a programmable soft-start feature and a programmable over-temperature shutdown (OTS). Additionally, the device has built in short circuit and over-current protection for continuous monitoring. The device also supports low-ripple, fast transient response and high efficiency operation.

The LT3474IFE-1#PBF is ideal for driving high-power LEDs with high efficiency and stability. It is also suitable for applications such as LED backlighting, gaming PCs, automotive lighting and signage. Additionally, it can be used in portable devices, flashlights, and any application that requires a constant current source and adjustable output voltage.

The LT3474IFE-1#PBF is suitable for a wide range of applications due to its flexibility and ease of use. It can efficiently deliver up to 1A of current with a wide input voltage range of 1.8V-40V and a wide PWM frequency range of 500 kHz to 60 kHz. It is also capable of providing a regulated output voltage from 0.3V to 28V. In addition, it has built in protection features like UVLO, OTS, short circuit, and over-current protection, enabling designers to create more robust designs. The device also offers excellent efficiency and fast transient response, making it a great choice for high-power LED designs.

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