LX1744CPW

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LX1744CPW is a PMIC (Power Management Integrated Circuit) designed to power LEDs by providing a constant current across a variety of voltages up to 36 V. It is primarily used in applications such as LED displays for TVs and digital signage, LED architectural lighting, point-of-sale displays, automotive lighting and emergency lighting.

The LX1744CPW is a constant-current LED driver with integrated high-voltage power MOSFET, built-in fault protection circuits and dimming control, and a programmable soft-start and fault timer. It supports a wide input voltage range of 6 V to 36 V and offers a programmable output current up to 1 A.

The LX1744CPW features a wide line current range and wide output voltage range, high efficiency, low power dissipation to reduce system temperature, and a linear current control mode for dimming or pulse width modulation (PWM) control.

The LX1744CPW also provides two configurable low-side output channels to enable multiple LEDs to be driven from a single device, with the option to connect them in series or parallel depending on the desired amount of brightness.

Working Principle

The LX1744CPW is a constant-current LED driver with an integrated high voltage power MOSFET. It regulates the current through the LEDs with a low-side MOSFET driver that switches current to the LEDs on a pulse width modulation signal.

The MOSFET driver is controlled by a control circuit, which senses the voltage and current in the LED string and adjusts the width of the pulses to maintain a precise current. This precise current is maintained regardless of the input voltage or variations in the forward voltage of the LEDs.

The LX1744CPW also offers dimming control, programmable soft-start and fault timer, and integrated fault protection circuits. It is also energy efficient and has a low system temperature.

Conclusion

The LX1744CPW is a PMIC designed specifically for LED applications. It features a wide input voltage range, high voltage power MOSFET, low-side MOSFET driver, programmable soft-start and fault timer, and integrated fault protection circuits. It is energy efficient and has a low system temperature. It is suitable for LED displays for TVs and digital signage, LED architectural lighting, point-of-sale displays, automotive lighting and emergency lighting.

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