UM1561 datasheet(4/39 Pages) STMICROELECTRONICS

Part #	UM1561

Description	This document describes how the firmware to manage the 250 W micro-inverter demo

PDF	39 Pages

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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4 / 39 page

System overview

UM1561

4/39

Doc ID 023556 Rev 1

System overview

This demonstration board consists of an isolated interleaved boost DC-DC converter and a

mixed frequency full bridge inverter used to deliver sinusoidal current at 50 Hz or 60 Hz to

the grid. The board is provided with a digital control section, capable of controlling the grid-

connected operation as well as an MPPT (maximum power point tracking) algorithm. The

firmware has been implemented on a 32-bit STM32F1xx microcontroller, high-performance

ARM® Cortex™-M3 32-bit RISC core operating at a 72 MHz frequency, high-speed

embedded memories (512 Kbytes for Flash memory and 64 Kbytes of SRAM), and an

extensive range of enhanced I/Os and peripherals connected to two APB buses. The device

offers three 12-bit ADCs, four general-purpose 16-bit timers plus two advanced PWM

timers, as well as standard and advanced communication interfaces: two I2Cs, three SPIs,

two I2Ss, one SDIO, five USARTs, a USB and a CAN.

Figure 1.

250 W microinverter - digital section based on STM32F1xx

microcontroller

STM32

ARM Cortex -M3

32-bit RISC core

™

AM15187v1

UM1561 Datasheet(PDF) 4 Page - STMicroelectronics