LP8556SQ-E00/NOPB

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Texas Instruments’ LP8556SQ-E00/NOPB is a Multi-String LED Driver that offers precision, safety and system performance. This high-efficiency driver is designed with multiple strings in a single chip in order to achieve high power density, enabling space efficient applications. The LP8556SQ-E00/NOPB is ideal for applications such as automotive and general illumination, and is rated for up to 40V and up to 1.2A per string.

This device is particularly interesting due to its high power, multi-functional nature and wide range of operating modes. It is designed with a multi-string architecture and up to 8 programmable strings of individually controllable LED channels, which can be programmed for desired brightness and current levels. The LP8556SQ-E00/NOPB includes Power Monitoring, which allows for precise control of the LED current regardless of the voltage variation. This device also includes temperature monitoring and open LED protection, to ensure the longevity and safety of the LED driver system.

In addition to multi-string LED driver capabilities, the LP8556SQ-E00/NOPB also offers two low cost and low power consumption - sleep and standby modes, as well as a programmable boost frequency to achieve tighter and faster output regulation. This device can also be used in a variety of dynamic lighting applications due to its dimmable capabilities and PWM output.

The LP8556SQ-E00/NOPB is highly-configurable to meet a wide range of application design requirements. It offers a user configurable ratio of number of channels on each string, as well as the ability to enable multiple strings and configure them independently. Additionally, the device is compliant with multiple standards including UL, EN, and IEC standards for safe operation, and supports a wide range of input voltages and temperature ranges.

The working principle of the LP8556SQ-E00/NOPB is based on an inverting Buck-Boost controller. This controller uses an internal high and low side MOSFET to rapidly turn on and off the LED string, while varying the on-time period to control the LED current, achieving a precisely regulated current level. This device also contains a Power MOSFET driving circuit, which is configured to control the boost voltage accurately, in order to regulate the LED current level.

In summary, the LP8556SQ-E00/NOPB is a perfect device for applications requiring high power driven LED strings and safety features. With its wide range of features, such as power monitoring, temperature monitoring, and PWM dimming, it is ideal for automotive and general lighting applications. With its multi-string LED driver and its high compatibility with multiple standards, it can be used to implement complex LED driver systems. Additionally, its Buck-Boost controller and Power MOSFET driving circuit help to regulate the LED current levels accurately, achieving superior system performance.

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