LM2756TM/NOPB

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The LM2756TM/NOPB is a constant current LED driver PMIC (Power Management Integrated Circuit) developed by Texas Instruments.

The LM2756TM/NOPB provides a highly efficient solution for controlling two or three strings of LEDs with a wide range of applications. It is designed to operate either singly or in multiple-string configurations. The output current is externally adjustable with a precision reference voltage. The device can be driven from a wide range of input voltages. It contains on-chip thermal protection circuitry and reverse current blocking diodes.

The LM2756TM/NOPB is ideal for applications such as automotive headlight and signal lighting, digital signage, instrumentation and medical equipment, solar panel backlighting and system panel backlighting.

The working principle of the LM2756TM/NOPB is based on a linear regulator approach. The circuit consists of an internal voltage reference, an error amplifier, a transistor and an output current sensing feedback loop. The output current is set by adjusting an external resistor. This output current is compared to a reference voltage, and the error signal is fed to an error amplifier which drives the output transistor. The output voltage is regulated to the reference voltage, and the output current is determined by the external resistor. Thus, the LM2756TM/NOPB provides a simple and accurate way to control the output current for each LED string.

In addition, the LM2756TM/NOPB includes on-chip thermal protection circuitry that shuts down the device in the event of thermal overload. It also includes reverse current blocking diodes to protect the LEDs from overtemperature conditions. This can also be used to connect multiple devices in parallel for increased output current and increased brightness.

The LM2756TM/NOPB is a high performance constant current LED driver PMIC that provides a highly efficient solution for controlling two or three strings of LEDs. It is designed to operate either singly or in multiple-string configurations and can be driven from a wide range of input voltages. The output current is externally adjustable with a precision reference voltage. The device also features on-chip thermal protection circuitry and reverse current blocking diodes for robust operation.

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