DC1037A

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The DC1037A, an Evaluation Board from Texas Instruments, is designed to illustrate the performance characteristics of off-line power supplies in the range of 5V to 25V. Commonly referred to as aDC/DC & AC/DC (Off-Line) SMPS – which stands for Switch Mode Power Supply – the DC1037A is widely used to evaluate the switching efficiency, control loop, and thermal performance of off-line power supplies. This evaluation board offers a wide range of features, including adjustable primary side current foldback, adjustable conduction time for power factor correction, adjustable dead times for phase-shifted zero voltage switching, and built-in current-mode control loop.

The DC1037A is a two-stage transformerless charger suitable for flyback, forward, and isolated buck converter architectures. Its design allows off-line power sources with different input and output voltages and currents. An onboard feature that is especially useful is the adjustable primary side current foldback. This feature adjusts the duty cycle of the main converter allowing for power savings under light load conditions.

The DC1037A is a complete evaluation board with all of the components needed for the power supply design. It includes an AC/DC power converter, a switch-mode power supply, a free-running oscillator, a power switch, and a controllable current-mode PFC controller. All of these components are assembled on a single board and interconnected with a permanent magnet flux gate that allows the circuit to operate in a closed loop with the power factor controller. The board also features a current-mode feedback loop. The feedback loop senses the current in the power switch and adjusts the frequency as necessary.

The DC1037A is the ideal evaluation board for low-power off-line supplies and systems thanks to its numerous adjustable features and the robust design which allows it to perform well in a wide variety of operating environments. The adjustable components allow designers to fine-tune the power supply to optimize performance for a given application. Furthermore, the board also offers protection against over-voltage, over-current, short-circuit, and thermal conditions, which helps preserve the longevity of the power supply.

The DC1037A also offers a built-in pre-bias circuit, which allows for continuous operation even with short periods of high ripple current. This feature is especially helpful for applications that require a stable input voltage, such as in lighting applications. Additionally, the adjustable conduction time for power factor correction ensures that the switching frequency is confined to a specified range that is suitable for use in a variety of power sources.

In conclusion, the DC1037A Evaluation Board from Texas Instruments is a versatile, easy-to-use solution for evaluating the performance of off-line power supplies. Its adjustable features, robust design, and built-in protections make it an ideal choice for evaluating the performance of a wide variety of applications. It is also an excellent solution for testing noise immunity in noisy environments and for testing the impact of power quality disturbances.

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