LTC3230EUD

Series:	*
Part Status:	Obsolete

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LTC3230EUD PMIC- LED Drivers

The LTC3230EUD is a high efficiency, high-current PMIC (power management integrated circuit) – LED driver from Linear Technology. This driver provides programmable current and voltage drive up to 6.2A for powering LEDs in various applications, such as handheld and medical devices, displays, or LED lighting systems. The driver offers strict LED current regulation and dimming performance and is designed to help reduce system power requirements.

Features of the LTC3230EUD

The LTC3230EUD has an internal linear regulator, allowing it to operate from a wide input voltage range (2.8V to 17V). It also features an adjustable current limit and Programmable dimming type, with a onboard programming capability. Additionally, the LTC3230EUD has an output short-circuit protection, thermal shutdown with hysteresis, and over-current protection.

The Application Field of LTC3230EUD

The LTC3230EUD is suitable for a broad range of applications, such as general illumination, medical, industrial and automotive lighting. Its output current limit can also be programmed from a 0.040A to 6.2A. This gives the user a great deal of flexibility when it comes to designing intricate, high power LED setups, such as backlighting, or automotive applications.

The Working Principle of LTC3230EUD

The LTC3230EUD incorporates a switching LED driver and linear LED driver, operating in a controlled type of dimming. This switching LED driver operates using a hysteretic buck topology, providing programmable current and voltage output up to 6.2A. The linear LED driver uses linear current control, allowing it to maintain a constant output current, even as the input voltage changes. To ensure the maximum system performance and efficiency, the LTC3230EUD offers several methods of dimming, such as frequency control and PWM dimming. Frequency control dimming uses a constant frequency PWM signal to reduce the output current of the driver. This is done by altering the switching frequency and amplitude of the buck output, which in turn reduces the output current of the driver.PWM dimming uses a fixed duty cycle PWM signal to reduce the output current. This is done by reducing the duty cycle of the PWM signal, which reduces the current output.The LTC3230EUD also features a built-in soft-start function, which enables a smooth current ramp-up. By slowly ramping up the current, overshoot effects can be avoided, helping to minimize the in-rush current.The LTC3230EUD also includes several protection functions, such as output current monitor and thermal shutdown protection. The output current monitor allows the user to monitor the current sense voltage and intrinsic transmission resistance, thereby preventing any over-current situations. The thermal shutdown protects against excessive junction temperatures, and can abort a shutdown through hysteresis control. Overall, the LTC3230EUD is a highly efficient, high power PMIC- LED driver, which offers a range of programmable current and voltage drive up to 6.2A. Its wide range of dimming options make it perfect for a range of LED applications. It is also equipped with several protection features, such as over-current protection, thermal shutdown and output current monitor, which ensures safe and reliable operation.

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