ADP8140ACPZ-2-R7

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The ADP8140ACPZ-2-R7 is an LED driver from Texas Instruments (TI). It is an integrated DC-DC converter, specifically suited for driving pixelated LED displays in a wide range of applications. This LED driver comes in a space-saving, surface-mount 680-mil WQFN package and is available in 1.8V and 2.0V rated versions. The device incorporates state-of-the-art safety features such as thermal shutdown, over- and under-voltage protection, which makes it a reliable and robust solution for driving LED displays.

In the field of PMIC (Power Management ICs) - LED Drivers, the ADP8140ACPZ-2-R7 is an ideal choice for driving up to 8 pixelated LED displays of up to 640-by-480 resolution. This LED driver has fast slew rate and very low output impedance, making it suitable for applications requiring high switching frequency and power delivery. Its wide input voltage range of 4.5V to 24V makes it suitable for use in both AC and DC power supplies. It also features high-accuracy current matching across all its outputs, making it ideal for applications requiring uniform color and brightness levels.

The ADP8140ACPZ-2-R7 is capable of providing up to 24mA of constant current on each output. This ensures that each LED remains within its safe operating range regardless of the ambient temperature. This LED driver also features advanced power management features such as soft-start, charge pump, and light load regulation, making it suitable for automated lighting control applications.

The working principle of the ADP8140ACPZ-2-R7 is quite straightforward. It is essentially an eight-channel current-regulating switching device that utilizes linear voltage regulators to maintain a constant current output. Basically, each of the eight outputs is connected to a high-speed switching transistor and linear voltage regulator. The switching transistor is controlled by an external pulse-width modulation (PWM) signal that varies the duty cycle to regulate the output current to the desired level.

The linear voltage regulator is responsible for maintaining a constant output voltage despite variations in input voltage and load current. This ensures that the resulting current output is constant and does not vary with changing input voltage or load current. The resulting output is then fed to the LED displays, maintaining a constant color and brightness level.

The ADP8140ACPZ-2-R7 is a very efficient LED driver, with power efficiency greater than 95% across its entire operating range. It also features low power dissipation and low electromagnetic interference (EMI). This LED driver is also very cost-effective and is backed by a global 24/7 support network from TI.

In conclusion, the ADP8140ACPZ-2-R7 is a very efficient and cost-effective LED driver that is specifically designed for driving pixelated LED displays in a wide range of applications. It features advanced safety features, fast slew rate and very low output impedance. It also incorporates advanced power management features such as soft-start, charge pump and light load regulation, making it an ideal choice for driving LED displays.

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