TPS61177RGRR

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The TPS61177RGRR LED driver is an integrated switching device specifically designed to drive multiple LED strings with an exceptionally low external component count. As a member of the PMIC – LED Drivers family, the TPS61177RGRR is used in a range of different applications, including display backlighting, gaming systems, projector systems, camera flashes, and industrial lighting.

The TPS61177RGRR is a constant-current controlled, step-down DC-DC converter that provides a high-efficiency solution for driving multiple LED strings. It features PWM operation at up to 500 kHz, a power factor correction circuit, and a high-side MOSFET switch. The device can be operated in either boost or buck-boost mode and supports pulse width modulation (PWM) for brightness dimming.

The TPS61177RGRR also features an enable pin, allowing it to be used in a sleep mode configuration to reduce power consumption. Additionally, the device features thermal protection and overvoltage protection, making it highly reliable and safe to operate.

The TPS61177RGRR’s working principle is quite simple. It converters the input voltage to the desired output voltage using a step-down, constant-current controlled, DC-DC converter and a high-side MOSFET switch. The switch is controlled using a PWM signal, which enables it to regulate the current through the LED strings. Due to its high switching frequency, the TPS61177RGRR can switch up to 500kHz, providing a smooth and efficient current regulation.

Additionally, the device features a power factor correction circuit, enabling it to reduce the total harmonic distortion (THD). The device’s enable pin allows it to be put into low power or sleep modes. This feature reduces overall power consumption and provides a more efficient system performance.

In summary, the TPS61177RGRR is a versatile and efficient LED driver and member of the PMIC – LED Driver family. Its efficient step-down, constant-current switch with PWM control, power factor correction circuit, enable pin, and protection features make it a great choice for multiple applications. This device is a powerful and reliable solution for driving multiple LED strings.

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