Application information

L6230

16/24

Doc ID 18094 Rev 2

The uncommitted internal comparator with open-drain output is available.

Figure 14.

F.O.C. typical application

6.2

Six-step driving method with current control

In this configuration only one sense resistor are needed, the three OUT pins are connected

The non-inverting input comparator CP+ monitors the voltage drop across the external

sense resistor connected between the source of the three lower power MOS transistors and

ground.

proportionally. When the voltage drop across the sense resistor becomes greater than the

reference voltage applied at inverting input CP- the comparator open-drain output is

switched on pulling down the CPOUT pin.

This signal could be managed by controller to generate the proper input sequence for six-

step driving method with current control and select what current decay method to

implement.

When the sense voltage decrease below the CP- voltage, the open-drain is switched off and

the voltage at CPOUT pin start to increase charging the capacitor C3.

The reference voltage at pin CP- will be set according to sense resistor value and the

voltage is to low-pass filter a PWM output of a controller.