LT1937ESC6#TRPBF

Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Active
Type:	DC DC Regulator
Topology:	Step-Up (Boost)
Internal Switch(s):	Yes
Number of Outputs:	1
Voltage - Supply (Min):	2.5V
Voltage - Supply (Max):	10V
Voltage - Output:	36V
Current - Output / Channel:	320mA (Switch)
Frequency:	1.2MHz
Dimming:	Analog, PWM
Applications:	Backlight
Operating Temperature:	-40°C ~ 85°C (TA)
Mounting Type:	Surface Mount
Package / Case:	6-VSSOP, SC-88, SOT-363
Supplier Device Package:	SC-70-6
Base Part Number:	LT1937

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Introduction

The LT1937ESC6#TRPBF is a PMIC-LED Drivers device manufactured by Linear Technologies. It is designed with an integrated switching output stage, designed to drive high brightness LED\'s. The device has the ability to perform PWM dimming in a current limited configuration for LED brightness control. It has a high efficiency current-mode LED driver topology, with a large temperature range achievable with small parts count. The device also has adjustable current limiting, wide input voltage range and protection features including short circuit and over temperature protection. It also has low quiescent current due to low voltage reference.

Application Field

The LT1937ESC6#TRPBF can be used in applications that require the control of the output current of high brightness LED\'s including automotive lighting, LCD backlighting, and indicator lighting. This device can be used for motor control applications where fine dimming is needed or as a PWM dimmer for high brightness LED\'s.

Working Principle

The LT1937ESC6#TRPBF working principle involves the use of an internal switching regulator as well as a dimming control circuit. The device has an internal 150mA current limit and will operate with an input voltage of 4.5V to 40V and a wide temperature range of -40°C to +125°C. The device is designed to drive high power LED\'s in PWM dimming with a slew rate of 20kHz and a minimum on-time of 50ns.The device is designed for applications where current limiting and PWM dimming are required. The device will limit the current to a safe level as well as allowing for dimming of the output current. The device can also be used in applications where more than two outputs are needed and an additional PWM input can be added.

Protection Features

The LT1937ESC6#TRPBF device has several protection features. The device has a dual mode over temperature protection which protects the device from over temperature conditions. It also has an adjustable current limit which can be set to limit the current output and protect the LED\'s. The device also has a short circuit protection which will detect any short circuit between the input and the output, and will shut down the device to protect the LED\'s. The device also has thermal shutdown protection which will shut down the device if the die temperature exceeds a predetermined temperature level.

Conclusion

The LT1937ESC6#TRPBF is an ideal device for applications that require the control of the output current of high brightness LED’s. The device is designed with switching regulator, adjustable current limitation and a wide temperature range. It also has protection features such as short circuit protection, over temperature protection and thermal shutdown protection. The device is also able to perform PWM dimming for LED brightness control and for motor control applications.

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