EVAL5970D

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EVAL5970D is an evaluation board designed to provide a quick and easy means of evaluating and using STMicroelectronics STF5970D switching, power management and power delivery integrated circuit. This evaluation board includes a 5 V to 100 V DC input, a 5 A peak current mode PWM synchronous Fly Buck power supply designed to provide up to 5 W output power. As its name implies, the EVAL5970D can be used either as a standard, non-synchronous, low power or high power step-down converter, and as an optional synchronous, high-efficiency, low ripple, and low EMI-compliant power supply.

The DC/DC & AC/DC (Offline) SMPS application field of EVAL5970D includes, but is not limited to, automotive applications, consumer applications such as products for home appliances, and industrial applications such as motor control and lighting. It can also be used as a reference design for the evaluation and testing of various applications and system solutions, or even as an integrated solution. The EVAL5970D is thus suitable for use in a wide range of applications that require high efficiency, low cost, high power density, and high power conversion quality.

EVAL5970D\'s working principle is based on synchronous rectification, where both high-side and low-side transistors are operated in phase with the PWM signals generated by the controller, allowing higher efficiency in the converter. Furthermore, the EVAL5970D employs a power MOSFET to "pull up" the voltage from the low side switch to the high side switch. This so-called "synchronous rectification" helps to minimize switching losses and reduce conduction losses, resulting in improved efficiency and better dynamic performance. The EVAL5970D also employs an optimized loop voltage feed forward (LVFF) control architecture and a peak current mode control loop, which provides a highly accurate output voltage sensing for improved stability and better control of the output voltage under all conditions.

The EVAL5970D evaluation board supports a wide input voltage range of 5 V to 100 V DC, which is connected to the input of the STF5970D via a power plane, enabling efficient management of the transient power demand. The EVAL5970D includes a complete set of components necessary for a successful evaluation of the circuit and provides an easy connection to a variety of output power stages.

For easy setup and evaluation purpose, several sense and triggering points are provided on the board. The board also has a thermal protection module which will turn off the power supply if the temperature reaches a certain level.

Overall, the EVAL5970D provides a wide range of features and functionality and is an ideal evaluation board for designs requiring versatility and performance in the DC-DC & AC/DC (Offline) SMPS application field.

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