STEVAL-ISA043V2

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The STEVAL-ISA043V2 is an AC-DC switch mode power supply (SMPS) evaluation board that is based on the offline topology for AC/DC applications. It is a non-isolated board with a rated power of 63 W that is capable of a wide input mains voltage range of 90-305V AC, which makes it suitable for both mains and battery-based applications. As such, it can be used for a variety of products ranging from air-conditioning systems to consumer electronics such as TVs, computers and home appliances.

The STEVAL-ISA043V2 consists of the following main components: an AC/DC converter, a PFC boost converter, an isolated driver, and an active clamp reset switch. The AC/DC converter is based on the IC STGP10NC60ND/BD, a 10A/600V N-channel MOSFET. This section of the board provides bias voltage, inrush current limiting, and overload protection. The PFC boost converter is based on the IC STUCC04V31YF/BF, a 4A/31V MOSFET. The isolated driver is based on the IC STX44H04BVL, a 4A/400V power half bridge driver. The active clamp reset switch is based on the IC CSD19530Q3A, a SenseFET. The board also includes a PWM controller IC, such as the STGP30NC60ND/BD, which is responsible for controlling the power stages. The board also includes several auxiliary functional blocks such as sense resistors, filter capacitors, overcurrent protection, thermal shutdown, and output voltage regulation.

The STEVAL-ISA043V2 operates in both continuous and quasi-resonant (QR) mode, depending on the load conditions. In continuous mode, the PFC boost converter runs at a fixed frequency, while in QR mode, it operates at a variable frequency. In continuous mode, the board is capable of achieving high efficiency, while in QR mode, the efficiency is lower but the power factor can be increased. To ensure optimal efficiency and power factor, the board features several techniques such as adaptive auto-frequency switching, adaptive burst-mode, adaptive phase-shift modulation, and primary-side regulation.

The STEVAL-ISA043V2 can be used in a wide variety of applications such as LED lighting, battery charging, and AC-DC adapters. It is flexible and can be easily configured for different operating requirements such as input voltage range, output voltage, and power. In addition, the board provides an array of protection features such as over-voltage, over-temperature, and overload protection. The board can be also monitor the status of output current, voltage, and temperature via an on-board LCD module.

In conclusion, the STEVAL-ISA043V2 is a well-designed AC-DC switch mode power supply evaluation board that is suitable for a variety of applications. It is capable of operating in both continuous and quasi-resonant mode and offers an array of features such as adaptive auto-frequency switching, burst-mode, phase-shift modulation, and primary-side regulation. The board also provides protection features such as over-voltage, over-temperature, and overload protection and features an onboard LCD module for monitoring output current, voltage, and temperature.

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