STSPIN32F0 datasheet(29/40 Pages) STMICROELECTRONICS

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STSPIN32F0

Device description

6.8

Operational amplifiers

The device integrates four rail-to-rail operational amplifiers suitable for signal conditioning,

in particular for analog Hall-effect sensors decoding and current sensing.

The operational amplifiers provide a rail-to-rail output stage with fast recovery in the

saturation condition. The output stage saturation happens in linear applications when a high

amplitude input signal occurs and causes the output of the operational amplifier to move

outside its real capabilities.

Figure 14. Operational amplifiers

6.9

Comparator

A comparator is available to perform an overcurrent protection. The OC Comp pin can be

connected to the shunt resistor to monitor the load current, the internal OC threshold can be

set via MCU (PF6 and PF7 port, see Table 12).

When an OC event is triggered, the OC comparator output signals the OC event to the

PB12 input of the MCU (BKIN).

Depending on the status of the OC_SEL signal (see Table 11) the OC event is acting

directly on the control logic of the gate driver switching off all high-side gate outputs, and

consequently the external high-side power switches.

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