This document provides preliminary information on a new product currently under development or evaluation. Details are subject to change.
The STEVAL-ISA007V1 is a high power 3-phase auxiliary power supply evaluation board designed for industrial applications requiring a wide input voltage range. It features a maximum output power of 150W and utilizes a fly-back converter operating in mixed mode (Continuous and Discontinuous Current Mode) to handle high power and wide input voltage requirements efficiently.
| Maximum output power | 150W |
|---|---|
| Input voltage | 400Vac +/- 20% |
| Output voltage 1 | 24V, 6.25A |
| Output voltage 2 | 5V, 0.075A |
| Auxiliary output voltage | 15V, 0.01A |
| Efficiency | > 85% |
| Switching frequency | > 90kHz |
| Stand-by switching frequency | > 35kHz |
The board is based on the L5991 PWM SMPS controller and the ESBT STCO8DE150HV Emitter Switched Bipolar Transistor.
The converter operates in mixed mode, using Continuous Current Mode (CCM) for higher power levels and Discontinuous Current Mode (DCM) for stand-by or low power levels.