LT3760IFE

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Introduction to LT3760IFE

The LT3760IFE is an advanced, high efficiency, linear mode switched current buck regulator with both current sink and source capability. It features Constant-Current (CC) / Constant-Voltage (CV) regulation with dual stage regulation, providing more precise regulation than traditional single stage buck regulator. The LT3760IFE can be easily configured either as SEPIC (Single Ended Primary-Inductance Converter) buck regulator or as current source / sink to drive a load. It is designed to drive LEDs with either a constant-current or a constant-voltage operation.

Application Field

LT3760IFE is primarily used in PMIC - LED Drivers. It is an ideal solution for driving and controlling a variety of LED applications including high power-backlight and display (LCD/TFT), automotive lighting, solid-state lighting, etc. The high efficiency and wide input voltage range of the LT3760IFE makes it especially suitable for automotive and battery powered applications. Additionally, the CC/CV application options of this regulator enable high-efficiency current and voltage regulation for the LED applications without requiring the use of additional components.

Working Principle

The LT3760IFE switches current between input and output). In the buck regulator mode, the LT3760IFE operates using a current mode control for improved transient response, stability and accuracy. The maximum switching frequency of the LT3760IFE can be chosen from 0.25MHz to 2MHz, allowing for an optimized solution for all applications. Additionally, a read-back pin is available to monitor the output voltage and current, providing a more precise regulation. The LT3760IFE is capable of sinking and sourcing up to 1A of current and can operate from 2.5V to 30V input.

The LT3760IFE uses a PFM/PWM dimming method to control the LED brightness or current. The frequency of PWM or PFM is controlled by an external ramp signal, which is used to control the brightness. Additionally, the LT3760IFE features over-voltage and over-current protection, providing a robust and reliable solution for all LED applications.

Conclusion

The LT3760IFE is a versatile linear mode switched current buck regulator with both current sink and source capabilities. It is an advanced solution for PMIC - LED Driver applications and is capable of achieving high efficiency and wide input voltage range with its CC/CV mode operation. The PFM/PWM dimming, rated at 1A sinking and sourcing capabilities make the LT3760IFE an ideal choice for a variety of LED applications.

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