AN4068 datasheet(5/63 Pages) STMICROELECTRONICS

5 / 63 page

AN4068

List of figures

Doc ID 022923 Rev 2

5/63

List of figures

Figure 1.

ST7580 reference design board with outline dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Figure 2.

ST7580 block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Figure 3.

Board drawing with the various sections indicated . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Figure 4.

Schematics of the ST7580 reference design board (part 1) . . . . . . . . . . . . . . . . . . . . . . . . 15

Figure 5.

Schematics of the ST7580 reference design board (part 2) . . . . . . . . . . . . . . . . . . . . . . . . 16

Figure 6.

Line coupling section schematics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Figure 7.

Measured frequency response of the transmission active filter (typical) . . . . . . . . . . . . . . 22

Figure 8.

Montecarlo simulation of the transmission active filter frequency response . . . . . . . . . . . . 22

Figure 9.

Measured frequency response of the reception passive filter (typical) . . . . . . . . . . . . . . . . 24

Figure 10.

Montecarlo simulation of the reception passive filter response . . . . . . . . . . . . . . . . . . . . . 24

Figure 11.

Measured frequency response of the transmission line coupling loaded with the EN50065-1

LISN impedance (typical)26

Figure 12.

Measured frequency response of the transmission line coupling loaded with 5 W + 15 µF

(typical) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Figure 13.

Montecarlo simulation of the transmission line coupling response loaded with the

EN50065-1 LISN impedance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Figure 14.

Isolated zero crossing coupling circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Figure 15.

Zero crossing coupling - positive edge delay . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Figure 16.

Zero crossing coupling - negative edge delay . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Figure 17.

Connections between the STM32F103CBT6 and the ST7580 devices on the

EVALST80-1 board. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Figure 18.

STM32F103CB external connections: schematics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Figure 19.

STM32 configurable signalling LEDs and pushbuttons . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Figure 20.

Measured input impedance modulus of the line coupling - reception mode (typical) . . . . . 35

Figure 21.

Measured input impedance modulus of the line coupling - transmission mode (typical) . . 35

Figure 22.

Conducted emissions test setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

Figure 23.

Conducted emissions: PSK transmission spectrum, peak measurement, 9 kHz - 150 kHz,

line-to-earth. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

Figure 24.

Conducted emissions: PSK transmission spectrum, peak measurement, 9 kHz - 150 kHz,

neutral-to-earth . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

Figure 25.

Conducted emissions: PSK transmission spectrum, quasi-peak measurement, 150 kHz -

30 MHz, line-to-earth . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

Figure 26.

Conducted emissions: PSK transmission spectrum, quasi-peak measurement, 150 kHz -

30 MHz, neutral-to-earth . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

Figure 27.

Conducted emissions: FSK transmission spectrum, peak measurement, 9 kHz - 150 kHz

, line-to-earth. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Figure 28.

Conducted emissions: FSK transmission spectrum, peak measurement, 9 kHz - 150 kHz,

neutral-to-earth . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Figure 29.

Conducted emissions: FSK transmission spectrum, quasi-peak measurement, 150 kHz -

30 MHz, line-to-earth . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

Figure 30.

Conducted emissions: FSK transmission spectrum, quasi-peak measurement, 150 kHz -

30 MHz, neutral-to-earth . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

Figure 31.

Common mode disturbance protection - positive disturbance . . . . . . . . . . . . . . . . . . . . . . 41

Figure 32.

Common mode disturbance protection - negative disturbance. . . . . . . . . . . . . . . . . . . . . . 42

Figure 33.

Differential mode disturbance protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

Figure 34.

Example of stencil openings for the QFN48 package. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

Figure 35.

PCB copper dissipating area on top layer (left) and bottom layer (right) for the ST7580

reference design board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

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