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240 W photovoltaic battery charger based on the SPV1020

The STEVAL-ISV005V2 demonstration board is mainly based on the SPV1020 device, a monolithic DC-DC boost converter designed to maximize the power generated by photovoltaic panels independently of temperature and amount of solar radiation.

The optimization of the power conversion is obtained with an 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. Since the maximum power point is locally computed, the efficiency at system level will be higher than that of conventional topologies, where the MPP is computed in the main centralized inverter.

For a cost-effective application solution and miniaturization requirements, the SPV1020 embeds the power MOSFETs for active switches and synchronous rectification, minimizing the number of external devices. Furthermore, the 4-phase interleaved topology of the DC-DC converter renders unnecessary the use of electrolytic capacitors, which would severely limit the lifetime.

The SPV1020 works at fixed frequency in PWM mode, where the duty cycle is controlled by the embedded logic running a “Perturb & Observe” MPPT algorithm. The switching frequency, internally generated and set by default at 100 kHz, can be tuned externally, while the duty cycle ranges from 5% to 90% with a step of 0.2%.

Safety of the application is guaranteed by stopping the drivers in case of output overvoltage or overtemperature.

The bypass diodes SPV1001N40 guarantee very high application efficiency even when the PV panel voltage is lower than the UVLO threshold of the SPV1020 (6.5 V) and the connection is in series consisting of two or more PV panels.

The SEA05 is connected to the output stage of the application and is used to implement the output current limitation (not available with the SPV1020 alone) through the current sensing resistors R9 and R10.

pdf 下载
Data Brief

Key Features

  • PWM mode DC-DC boost converter
  • Duty cycle controlled by MPPT algorithm with 0.2% accuracy
  • Operating voltage range 0-40 V
  • Overvoltage, overcurrent, overtemperature protections
  • Built in soft-start
  • Up to 98% efficiency
  • Automatic transition to burst mode for improved efficiency at low solar radiation
  • SPI interface
  • Output current limitation
  • RoHS compliant


图案 资源


Technical Documentation

Product Specifications

描述 版本 大小
DB1543: 240 W photovoltaic battery charger based on the SPV1020
1.0 327 KB

Application Notes

描述 版本 大小
AN3971: STEVAL-ISV005V2: solar battery charger for lead acid batteries based on the SPV1020 and SEA05
2.0 1,542 KB

Hardware Resources

Board Manufacturing Specification

描述 版本 大小
STEVAL-ISV005V2 gerber files
1.0 347 KB

Bill of Materials

描述 版本 大小
3.0 61 KB

Schematic Pack

描述 版本 大小
STEVAL-ISV005V2 schematics
1.0 69 KB

样品 & 购买

产品型号 Marketing StatusCore ProductOrder From STUnit Price (US$)*
@ 1
Distributor AvailabilityRoHS Compliance GradeDownload
Material Declaration**
STEVAL-ISV005V2NRNDSPV1020-82No availability reported, please contact our Sales officeEcopack2-

(*) 建议零售价格仅用于预算,以美元为单位,每。的报价,以当地货币计算的价格,请联系您当地的 ST 销售办事处 或我们的 分销商
(**) 材料声明表格上提供st.com可以是一般的文件,根据最常用的包,包内的家庭。出于这个原因,他们可能不是100%准确,对于一个特定的设备。请联系我们 销售支持 在特定设备上的信息。
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