IS31LT3353-SDLS4-TR

IS31LT3353-SDLS4-TR, is one of the advanced LED drivers provided by Integrated Silicon Solution, Inc. (ISSI). It is a current-mode, fixed-frequency, constant-frequency LED driver with a wide range of LED current. It is designed to drive LED arrays with an external pulse-width modulation (PWM) dimming control. The IS31LT3353-SDLS4-TR belongs to the PMIC-LED driver category.

Application Field

The IS31LT3353-SDLS4-TR is ideal for use in a wide range of applications including automotive, industrial, and general lighting. It is designed to provide a simple, cost-effective, and highly efficient solution for driving LED arrays. The IS31LT3353-SDLS4-TR provides excellent temperature compensation, which ensures consistent performance across a wide range of temperature. The device is capable of driving up to four strings of LEDs with a peak current of 50 mA per string. The device operates from a wide range of supply voltages ranging from 6V to 38V and is suitable for buck, boost, and buck-boost topologies.

Working Principle

The IS31LT3353-SDLS4-TR employs a unique constant frequency peak current mode technique to accurately control the output current with a minimum number of external components. The current-mode control ensures a fast response and improved line and load regulation. The device operates in a fixed frequency current mode that provides excellent line and load regulation. The device is also designed to respond quickly to PWM input levels and can be dimmed over a wide range of PWM dimming levels. The device can operate in both continuous and discontinuous conduction mode to minimize switching losses. With the integrated temperature compensation and over-temperature protection, the device ensures reliable operation across the operating temperature range.

The IS31LT3353-SDLS4-TR can be used as either an LED driver or an LED dimmer. In LED driver mode, the device provides a constant current output with a fixed PWM duty cycle. This allows for accurate LED current control without the need for pulse-width modulation feedback loops. In LED dimmer mode, the device provides a variable duty cycle that can be adjusted with a PWM input. This allows for accurate dimming control of the LED array. The device also has an over-temperature protection feature that can be used to detect overheating and terminate the operation.

The IS31LT3353-SDLS4-TR is a highly integrated and reliable device that provides an adjustable and cost-effective solution for driving LED arrays. The device is capable of driving up to four strings of LEDs with a peak current of 50 mA per string and is suitable for buck, boost and buck-boost topologies. The device provides accurate and reliable performance with an integrated temperature compensation and over-temperature protection feature.