STEVAL-ISV018V1 STMICROELECTRONICS [STMicroelectronics], STEVAL-ISV018V1 Datasheet

STEVAL-ISV018V1

Manufacturer Part Number

STEVAL-ISV018V1

Description

300 W PV converter to be integrated into a photovoltaic panel based on SPV1020 and bypass diodes SPV1001N30 and SPV1001N40

Manufacturer

STMICROELECTRONICS [STMicroelectronics]

Datasheet

1.STEVAL-ISV018V1.pdf (4 pages)

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300 W PV converter to be integrated into a photovoltaic panel based

Features

■

Description

The STEVAL-ISV018V1 demonstration board

contains three SPV1020s in the same PCB and is

suitable for distributed PV panels with 3 isolated

strings. The outputs of the SPV1020s can be

connected in parallel or in series, despite the

pairs of independent inputs.

The STEVAL-ISV018v1 default setting is output

series connection.

The SPV1020, is a monolithic DC-DC boost

converter designed to maximize the power

generated by photovoltaic panels independent 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 PV panels, replacing the

bypass diodes and, thanks to the fact that 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.

April 2012

For further information contact your local STMicroelectronics sales office.

on SPV1020 and bypass diodes SPV1001N30 and SPV1001N40

PWM mode DC-DC boost converter

Duty cycle controlled by MPPT algorithm with

0.2% accuracy

Operating input voltage range: 6.5 V to 40 V

Operating output voltage: up to 120 V

Overvoltage, overcurrent, overtemperature

protection

Built in soft-start

Up to 98% efficiency

Automatic transition to burst mode for

improved efficiency at low solar radiation

SPI interface for remote telemetry and control

RoHS compliant

Doc ID 023149 Rev 1

For a cost effective application solution and the

meeting of miniaturization needs, 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 allows the use of electrolytic capacitors

to be avoided, which could severely limit the

lifetime.

It works at fixed frequency in PWM mode, where

the duty cycle is controlled by the embedded logic

running a Perturb and Observe MPPT algorithm.

The switching frequency, internally generated and

set by default at 100 kHz, is externally tunable,

while the duty cycle can range from 5% to 90%

with a step of 0.2%.

Safety of the application is guaranteed by

stopping the drivers in the case of output

overvoltage or overtemperature.

STEVAL-ISV018V1

Data brief

www.st.com

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STEVAL-ISV018V1 Summary of contents

Page 1

... PV panels with 3 isolated strings. The outputs of the SPV1020s can be connected in parallel or in series, despite the pairs of independent inputs. The STEVAL-ISV018v1 default setting is output series connection. The SPV1020 monolithic DC-DC boost converter designed to maximize the power generated by photovoltaic panels independent of temperature and amount of solar radiation ...

Page 2

... Schematic 1 Schematic Figure 1. Schematic diagram 2/4 Doc ID 023149 Rev 1 STEVAL-ISV018V1 ...

Page 3

... STEVAL-ISV018V1 2 Revision history Table 1. Document revision history Date 26-Apr-2012 Revision 1 Initial release. Doc ID 023149 Rev 1 Revision history Changes 3/4 ...

Page 4

... Australia - Belgium - Brazil - Canada - China - Czech Republic - Finland - France - Germany - Hong Kong - India - Israel - Italy - Japan - Malaysia - Malta - Morocco - Philippines - Singapore - Spain - Sweden - Switzerland - United Kingdom - United States of America 4/4 Please Read Carefully: © 2012 STMicroelectronics - All rights reserved STMicroelectronics group of companies www.st.com Doc ID 023149 Rev 1 STEVAL-ISV018V1 ...

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