AN3392 datasheet(11/57 Pages) STMICROELECTRONICS

Part #	AN3392

Description	The SPV1020 is a monolithic DC-DC boost converter designed

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

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AN3392

SPV1020 description

Doc ID 018749 Rev 1

11/57

SPV1020 description

The SPV1020 is an IC designed to provide a boost with a 4-phase interleaved topology

when supplied by photovoltaic panels.

In a 4-phase topology, the inductor-switch-diode branch is cloned 3 times and the resulting

four branches are connected in parallel. The resulting architecture is shown in Figure 8

below:

Figure 8.

Boost converter interleaved 4-phase architecture

The SPV1020 drives the four switching elements with the same waveform but shifted by

TSW/4.

In order to increase application efficiency each diode can be replaced by a switching

element driven complimentary with respect to the corresponding switch. Furthermore, these

four switching elements (synchronous rectifiers) must be driven in order to prevent current

flow from the output to the input.

The SPV1020 integrates four zero crossing blocks (ZCB), one for each branch. Their role is

to turn off the related synchronous rectifier to prevent reverse current flow from output to

input.

AN3392 Datasheet(PDF) 11 Page - STMicroelectronics