TL2842P

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TL2842P is a DC/DC controller IC that is used for various fields in power management. It includes a fixed frequency, current mode PWM control, allowing for an output current of up to 12A. The TL2842P provides precise voltage regulation with a tight tolerance of 1% over a wide line and load range. It features high performance with accurate line and load regulation under heavy load transients. This makes it ideal for applications that require tight regulation with high accuracy.

The TL2842P operates in a fixed frequency, peak current mode. This control method means that it regulates the output voltage by controlling the on-time ratio of the power switch. The current of the power switch cycles above and below the peak current threshold, so that the average inductor current becomes equal to the output current. Any variation in the input or output current results in a change in the on-time ratio, which in turn maintains the output voltage.

The power switch current is sensed with a dedicated external current sensing resistor. When the current through the sensing resistor exceeds the peak current threshold, the power switch is turned off. The peak current threshold of the power switch is inversely proportional to the current sensing resistor. This allows for a wide range of applications by changing the power switch current. The switching frequency of the TL2842P can also be adjusted to optimize the efficiency and size of the external components.

The TL2842P has various features that make it useful for multiple applications. It includes thermal shutdown protection for the power switch, allowing for higher current operation. It also has a power good indicator, which can be used to indicate a stable output voltage and indicate an overload condition. The external synchronization feature is also included, which allows the switching frequency to be synchronized to an external oscillator. This feature is especially useful for applications where noise could be generated due to the switching frequency of the power switch.

In summary, the TL2842P is a fixed frequency, current mode PWM controller designed for precise voltage regulation. It has excellent line and load regulation, making it suitable for applications that require accurate voltage regulation. It also has adjustable peak current protection, allowing for higher current operation. There are various other features which make the TL2842P suitable for various applications such as battery management, motor control, and dc/dc power supply applications.

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