LT3761EMSE-1#TRPBF

Voltage - Output:	--
Base Part Number:	LT3761
Supplier Device Package:	16-MSOP-EP
Package / Case:	16-TFSOP (0.118", 3.00mm Width) Exposed Pad
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C (TA)
Applications:	--
Dimming:	Analog, PWM
Frequency:	100kHz ~ 1MHz
Current - Output / Channel:	--
Series:	True Color PWM™
Voltage - Supply (Max):	60V
Voltage - Supply (Min):	4.5V
Number of Outputs:	1
Internal Switch(s):	No
Topology:	Flyback, SEPIC, Step-Down (Buck), Step-Up (Boost)
Type:	DC DC Controller
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Introduction

LT3761EMSE-1#TRPBF is a high efficiency, synchronous LED DRIVER for LED backlighting applications. It has a wide adjustable switching frequency range from 200kHz to 2.2MHz, which is suitable for supply Voltage from 6V to 48V in almost any LED application. The device is also built-in with excellent features such as open LED detection, maximum dim level setting, low ripple current and low quiescent current. All these features make it suitable for many LED applications, especially LED backlighting applications.

Application Field

The main application field of LT3761EMSE-1#TRPBF is LED backlighting applications. The wide input voltage range and adjustable switching frequency make it ideal for applications which require higher efficiency and need to be driven by a wide voltage range. It is also an ideal solution for dimmable LED applications requiring open detection and maximum dim level setting.

Working Principle

The LT3761EMSE-1#TRPBF works on the principle of constant current regulation. It regulates the LED current by varying the switching frequency and pulse width modulation. The device uses a high-side current sense resistor to monitor the current flow and provides feedback to the controller. The controller then variably adjusts the switching frequency and the duty cycle of the pulse width modulation to maintain a constant current.The device is also built-in with open LED protection. This feature makes it possible to detect open LED faults which could otherwise cause the device to overheat and malfunction. The maximum dim level setting makes dimmable LED applications easier to design. By setting a register, the user can adjust the maximum output current limit. This prevents the device from exceeding a preset brightness level and helps to protect the LEDs from thermal runaway.

Conclusion

In conclusion, the LT3761EMSE-1#TRPBF is a powerful LED DRIVER for LED backlighting applications. Its wide adjustable switching frequency range, open LED detection, maximum dim level setting, low ripple current and low quiescent current features make it ideal for many LED applications.

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