Oscillator frequency

L6571A - L6571B

6/12

Doc ID 4946 Rev 6

4

Oscillator frequency

The frequency of the internal oscillator can be programmed using external resistor and

capacitor.

The nominal oscillator frequency can be calculated using the following equation:

Equation 1

some cares have to be taken:

1.

When CF is to GND the high side driver is off and the low side is on

2.

simple way to do this is to limit the current discharge with a resistive path imposing

Figure 3.

Fault signal

Figure 4.

Waveforms