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PMIC - LED Drivers

The LX1995-1CSG-TR is an integrated charge pump interface regulator from LXD Industries that combines a high-efficiency buck-boost regulator, two low dropout regulators (LDOs), a charge pump, and an adjustable output current limited current regulator. The device is designed to supply a wide range of power management functions for advanced applications requiring high performance and low power consumption. It is targeted for powering high-intensity LEDs for a variety of lighting applications.

Application Field and Working principle

The LX1995-1CSG-TR can be used in a wide range of LED lighting applications such as automotive lighting, lighting panels, indoor and outdoor lighting, and commercial LED lighting. It is also suitable for driving high power LED as well as LED cluster applications. The device is capable of regulating the LED current to maintain a consistent brightness level.

The LX1995-1CSG-TR features a wide input voltage range of 4.5V to 24V and has 8 adjustable LEDs for flexible power control. The device is an inexpensive and efficient solution for driving a range of LEDs from 20mA to 800mA. The device also supports wide temperature range of -40°C to +120°C.

The LX1995-1CSG-TR incorporates an input voltage controlling mechanism that monitors the input voltage and adjusts the charge pump frequency based on the input voltage to ensure stable output current. It also features an adjustable output current limit that can be programmed to achieve the desired output current with a simple external resistor. It is also capable of providing a wide range of output voltage as low as 0.15V and as high as 28V.

The LX1995-1CSG-TR also features two low dropout regulators that can be connected to either the charge pump or the buck-boost regulator. Each of the two LDOs has independent enable pins and can be configured to provide the required power supply for the LED. The two LDOs can be operated in both boost and buck mode for flexible power supply. The device also integrates an overcurrent protection circuit to protect the LEDs from excessive current.

In addition, the LX1995-1CSG-TR also comes with an integrated MOSFET switch that can be used to turn off the LED when the backlight is not needed and to minimize power consumption. It also features a programmable fault timer that can be set to ensure that the LED is turned off if an over-current event occurs or if the input voltage is out of range. The fault timer can be programmed to delay the LED off time to avoid erratic LED lighting and provide a more stable operation.

The LX1995-1CSG-TR is an ideal solution for driving high power and high intensity LEDs, providing an efficient and cost-effective solution. It is suitable for a wide range of applications, such as automotive lighting, lighting panels, industrial lighting, and commercial LED lighting. With its adjustable current limit and wide input voltage range, it is capable of providing a reliable and stable output current for high brightness LEDs. It also offers a wide range of protection circuits, ensuring safety and reliable operation.

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