LT3519IMS#TRPBF

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PMIC - LED Drivers

LT3519IMS#TRPBF is an integrated dual buck-boost regulator that drives external switches to generate a regulated output such as Voltage, current or power. It has many applications ranging from powering LEDs, wireless charger, automotive motor control and many more.

The device includes two separate Buck Boost converters integrated in a single package that provide a very efficient output power delivery solution for LED lighting applications. Each converter uses a control loop to adjust the power delivered to the LED load and to keep the system at a constant output. This is achieved by using feedback from the LED load to adjust the output voltage, and from the output voltage to adjust the peak current.

The LT3519IMS#TRPBF also incorporates a low dropout (LDO) regulator, which provides a regulated supply voltage for the onboard microcontroller and other components. The LDO is designed to maintain constant supply voltage, thus improving the overall efficiency. The device also offers a variety of protection features, such as over current, over temperature, and short circuit protection.

Application Fields

The LT3519IMS#TRPBF is ideal for applications such as automotive headlights, outdoor lighting, mobile phones, tablets, smartwatches, and wearable devices. It is especially suitable for applications where low input voltage, low output voltage, and high efficiency are required. The device provides a maximum output voltage of 6V and can deliver up to 1A of output current, making it well-suited for higher power loads.

Working Principle

The LT3519IMS#TRPBF utilizes a current loop to adjust the duty cycle of its synchronous switching buck-boost converters. The duty cycle is determined by the voltage feedback of the LED load. The output voltage is regulated independently of the input voltage or load current, providing a consistently regulated output voltage and maximum efficiency over the operating temperature range. The LT3519IMS#TRPBF also incorporates a low dropout (LDO) regulator for powering the internal control IC and other components, ensuring that optimum performance is maintained even under low input voltage conditions.

The LT3519IMS#TRPBF includes a variety of protection features, such as over current, over temperature, and short circuit protection. The device also has LED open circuit protection, which ensures that the device is not damaged due to open LED connections. The LT3519IMS#TRPBF is also fully compatible with a wide range of LED sources, including single-color, RGB, and high-power COB light sources.

Conclusion

The LT3519IMS#TRPBF is a highly integrated dual buck-boost regulator specifically designed for applications such as automotive headlights, outdoor lighting, mobile phones, tablets, smartwatches, and wearable devices. The device provides a maximum output voltage of 6V and can deliver up to 1A of output current, making it well-suited for higher power loads. The LT3519IMS#TRPBF is a fully integrated solution and includes protection features, such as over current, over temperature, short circuit, and open LED protection.

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