EVL5520-QJ-00A

MPL Optimized Performance with MPS Inductor The EVL5520-QJ-00A is an evaluation board designed to demonstrate the capabilities of the MP5520, a high-efficiency, monolithic converter used for power management in enterprise and datacenter solid-state drive (SSD) applications. The MP5520 integrates dual input current-limit switches (e-fuses), a bidirectional buck-boost converter, and a bidirectional power-sharing converter. The dual e-fuses feature low on resistance (RDS(ON)) and are designed for input voltages (VIN1 and VIN2) up to 16V and 6V, respectively. Both e-fuses provide input current limiting and reverse-current blocking. Soft start (SS) prevents inrush current during system start-up. The bidirectional buck-boost converter provides energy management. Backup energy is stored in high-voltage capacitors, where the configurable charging current controls the rate at which the storage voltage (VSTRG) ramps up. Paired with the reverse-current blocking function of the e-fuses, the backup energy is fully utilized to support the load during power outages. When the bidirectional converter releases the energy from the storage capacitors, constant-on-time (COT) control minimizes the voltage drop during the transition from charge mode to backup mode. Only one inductor is required, which minimizes the total solution size. The bidirectional power-sharing converter provides power sharing between the e-fuses. It can be configured to two modes: boost-sharing mode or buck-sharing mode. In buck-sharing mode, the MP5520 can work in either standalone mode or power-sharing mode. The internal analog-to-digital converter (ADC) accurately monitors the input voltages (VINx), input currents (IINx), and input powers (PINx). To guarantee long-term system reliability, the MP5520 provides storage capacitor health monitoring. The MP5520 requires a minimal number of readily available, standard external components, and is available in a QFN-37 (5mmx6mm) package.