Board architecture

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Board architecture

The STEVAL-IHM011V1 can be schematized as in Figure 4.

Figure 4.

Power board architecture

The power board is developed around the IGBT power module that contains the inverter

bridge constituted of six IGBT power switches and the AC rectifier bridge (see Figure 3).

The board has been designed to operate with a 5 V or 3.3 V microcontroller so the power

supply stage provides 15 V, 5 V, and 3.3 V voltage reference respectively for the driver and

for the control board and a configuration can be selected by the jumpers.

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Table 3 indicates the maximum current sourced by the power supply pins of the MC

connector (28 and 25).

The board can be configured to work with three different configurations for current sensing:

●

1 Shunt resistor,

●

3 Shunt resistors or

●

3 Insulated Current Sensor ICS

The amplification network for current sensing is present and configurable for 1 or 3 signals.

In the one-shunt configuration the amplification is positive and the levels of the amplified

signal are compatible with the ST7MC control board STEVAL-IHM010V1 (range 0 V - 5 V).

Table 3.

Maximum values of current sourced by internal voltage regulators

Voltage level

Max current

Unit

+ 5 V

750

mA

+ 3.3 V

900

mA