LT3596EUHG

The LT3596EUHG is an efficient and highly integrated LED driver specifically designed for high-power LED applications. It features a unique low-profile monolithic design, which makes it suitable for a wide range of applications including LED lighting, medical, automotive and portable devices. This article will discuss the application field and working principle of the LT3596EUHG.

Overview

The LT3596EUHG is a buck-boost LED driver that is capable of operating from a 5V to 60V supply voltage. It can support up to 2A of LED current and provides an accurate LED current regulation of 0.2%. The LED drivers also feature a wide operating temperature range of -40 to 150C and a maximum operation frequency of 1MHz. It also has a wide dimming range of 280:1 and offers high-power off-time (up to 10s) at low current levels.

Features

The LT3596EUHG features an integrated 3-V buck-boost synchronous PWM boost converter, which allows it to provide a constant current to its output light source. In addition, it also integrates a large value on-chip capacitor to reduce output ripple and ensure PWM operation. Furthermore, the driver also features an integrated current sensing circuit that provides accurate current regulation.

The LT3596EUHG also offers a variety of protection features such as under-voltage lockout, over-voltage lockout, short-circuit protection, fault signal reporting, and temperature-controlled shutdown. In addition, it offers an OTP feature to enable over-current and over-temperature protection to ensure that the system can operate safely. The driver also features a shutdown/restart/sleep control feature to reduce the consumption of power in standby mode.

Applications

The LT3596EUHG is suitable for a wide range of applications including LED lighting, medical devices, automotive, and portable devices. It can provide constant current to drive a variety of LED configurations such as single, double, or triple strings. Additionally, it can also be used to drive high-power LEDs in applications such as automotive interior/exterior lighting, LED panel and display backlighting, and LED street lighting.

Working Principle

The LT3596EUHG operates by controlling the LED current via an input voltage regulator that monitors the LED voltage. The voltage regulator is connected to a current control loop that regulates the LED current. The current control loop senses the LED current and provides a signal to the voltage regulator to maintain the desired LED current. The voltage regulator also provides feedback to the current control loop to ensure that the LED current is accurately regulated.

The LT3596EUHG then translates the voltage regulator signal to a PWM signal for the boost converter. The boost converter steps up the input voltage to the output voltage required for the LED current. The current control loop then keeps track of the LED current and provides a feedforward signal to the boost converter in order to maintain the desired current. Finally, the output of the boost converter is connected to the output LED/LED string.

Conclusion

The LT3596EUHG is an efficient and highly integrated LED driver that is specifically designed for high-power LED applications. It features a unique low-profile monolithic design and can provide accurate LED current regulation of 0.2%. It can support up to 2A of LED current and offers a wide operating temperature range. Additionally, it also integrates a variety of protection features to ensure safe operation. The LT3596EUHG is suitable for a wide range of applications including LED lighting, medical devices, automotive, and portable devices.