LT3597EUHG#TRPBF

Voltage - Output:	--
Base Part Number:	LT3597
Supplier Device Package:	52-QFN (5x8)
Package / Case:	52-WFQFN, 39 Leads, Exposed Pad
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C (TJ)
Applications:	Backlight
Dimming:	PWM
Frequency:	200kHz ~ 1MHz
Current - Output / Channel:	100mA
Series:	--
Voltage - Supply (Max):	55V
Voltage - Supply (Min):	6V
Number of Outputs:	3
Internal Switch(s):	Yes
Topology:	Step-Down (Buck)
Type:	DC DC Regulator
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Introduction

LT3597EUHG#TRPBF is a PMIC (Power Management Integrated Circuit) device specifically used for LED (Light Emitting Diode) drivers. This highly efficient converter utilizes a switching regulator that has a low noise level and is able to provide an adjustable current for an extended period of time. This device is perfect for applications such as camera flash, display backlighting, and general illumination of different types of LEDs.

Application Field

The LT3597EUHG#TRPBF is primarily used to power LEDs in different application fields. As mentioned, it is a very suitable device for digital cameras’ flash light, as its high switching frequency, low output noise and high efficiency offers the perfect conditions for optimum illumination. It has precisely adjustable current limit as well as adjustable dimming frequency with up to 1.2MHz switching frequency. Another application this device is suitable for is to provide backlighting for displays. It is typically used in GR-EL displays, which typically require high frequency, low noise and high efficiency circuitry. The high efficiency offered by the LT3597EUHG#TRPBF makes it perfect for this type of application. In addition to the cameras and display applications, this device is also highly used for general illumination purposes for different types of LEDs. Its low noise levels and its easy adjustable switching current limit makes it perfect for even small lighting applications.

Working Principle

The LT3597EUHG#TRPBF LED driver is based on a current-mode Buck regulator circuit with a voltage feedback loop. The IC takes the input from a DC-DC buck converter to the internal switches, allowing more current flow over an upgraded load circuit. The device utilizes a switching frequency of up to 1.2MHz and adjusts its switching frequency automatically depending on the load characteristics. This helps in regulating the amount of current that flows through the LEDs, which helps to maintain the voltage across the LEDs at a more consistent output. Additionally, the device is able to adjust the current limit of the LEDs with a range of 0.25 A to 1.6 A. The LT3597EUHG#TRPBF incorporates a PWM dimming with dimming frequency of up to 200K Hz. This helps to reduce the undesirable EMI (electromagnetic interference) generated by the LEDs. Additionally, the switching current of the device is increased by the ‘Current Boost’ feature to allow it to handle bigger current loads with ease. The LT3597EUHG#TRPBF is a robust, efficient and low noise switching converter that is uniquely designed for LED driver applications. It is excellent choice for applications from camera flashes to backlighting for displays and general illumination of LEDs.

Conclusion

The LT3597EUHG#TRPBF is a high performance power management integrated circuit that is designed specifically for LED driver applications. Its low noise and adjustable current limit makes it the perfect device for a wide range of applications such as digital cameras, displays and general illumination of different types of LEDs. The device’s precision regulation helps to ensure that the LEDs are powered with consistent voltage, while the PWM dimming reduces EMI effects. Overall, the LT3597EUHG#TRPBF is an excellent choice for LED driver applications.

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