STMicroelectronics SPV1020
The SPV1020 is a monolithic 4-phase interleaved DC-DC boost converter designed to maximize the power generated by photovoltaic panels independent of temperature and amount of solar radiation. Datasheet − production data PowerSSO-36 For a cost effective application solution and to minimize size, the SPV1020 embeds power MOSFETs for active switches and synchronous rectifiers, minimizing the number of external devices.FEATURES
● PWM mode DC-DC boost converter● Duty cycle controlled by MPPT algorithm with 0.2% accuracy
● Operating voltage range 6.5 - 40 V
● Overvoltage, overcurrent, overtemperature protection
● Interleaved 4-phase topology
● Built-in soft-start
● Up to 98% efficiency
● Power capability 320 W at 40 V output
● Automatic transition to burst mode for improved efficiency at low solar radiation
● SPI interface
APPLICATIONS
● Photovoltaic panels● Battery charging with a CVCC controller
DESCRIPTION
Optimization of the power conversion is obtained with embedded logic which performs the MPPT (max. power point tracking) algorithm on the PV cells connected to the converter. One or more converters can be housed in the connection box of the PV panels, replacing the bypass diodes. As the maximum power point is locally computed, the efficiency at system level is higher than that of conventional topologies, where the MPP is computed in the main centralized inverter. In addition, the 4-phase interleaved topology of the DC-DC converter obviates the need to use electrolytic capacitors, which may severely limit system lifetime.