TL1451ACD

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The TL1451ACD is a DC-DC switching controller, part of the Voltage  Regulators subsection found within PMIC (power management integrated circuits). This device is designed for controlling a wide variety of DC-DC converter topologies and is optimized for voltage regulator and DC/DC conversion designs. It incorporates advanced control features that enable high performance, small form-factor designs with low total cost. It also offers low cost and low power over a wide range of applications due to its frequency control and power limit features.

On-chip features of the TL1451ACD include an oscillator, a clock divider, a power limit circuit, a pulse width modulator, an error amplifier, a reference (VREF) output and comparator, and an open drain output driver. The power stage utilizes an external MOSFET to drive an inductive load with a switching frequency up to 1MHz. The optimized VREF, power limit, and frequency control algorithms enable high efficiency, small size, and low cost designs.

The main application fields for the TL1451ACD include automotive, computing, communications, consumer, and industrial systems. This device is particularly well-suited for applications such as PWM DC-DC converter, LED driver non-isolated buck and boost converter, multiple-output DC-DC controller, and point-of-load converter. It provides excellent power conservation, efficient power delivery, and low noise performance. Moreover, the TL1451ACD can meet the requirements of different applications due to its integrated features and easy programmability.

The working principle of the TL1451ACD is based on the pulse width modulation (PWM). The clock inputs (CLKIN) switch the external power MOSFET at a duty cycle determined by the voltage at the error amplifier output. The VREF output pin compares the output of the error amplifier to the programmed reference voltage and VFB inputs. The power limit circuit keeps the duty cycle from exceeding a predetermined amount. This ensures that the output voltage does not drop below the programmed value. In addition, the device operates over a wide input voltage range from 3.3V to 40V and has an adjustable output voltage range from 0.8V to 88V.

The TL1451ACD provides low noise operation due to its frequency control and power limit circuitry. Its built-in protection and diagnostic features protect the device against over-voltage, over-current and temperature conditions. These features make it very reliable in critical system operations. Furthermore, the TL1451ACD provides excellent current load transient performance required for a wide range of applications.

The TL1451ACD is an ideal DC-DC switching controller for many DC-DC converter topologies requiring high efficiency, small size and low cost, such as automotive, computing, communications, consumer, and industrial systems. Due to its low noise operation and excellent performance, the TL1451ACD is the perfect choice for any type of application.

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