Datasheet

L6460 Power bridges
Doc ID 17713 Rev 1 73/139
14.1.6 Synchronous buck regulator configuration (Bridge 3)
Bridge 3 can be configured to be used as 2 independent synchronous buck regulators or as
a single high current synchronous buck regulator using GPIOs pins in order to close the
voltage loop. The resulting regulator(s) will implement a non linear, pulse skipping, control
loop using an internally generated PWM signal. The voltage will be set externally with a
divider network and PWM duty cycle that can be programmed in order to ensure a proper
regulation.
The regulator will be enabled/disabled using serial interface and will implement a soft start
strategy similar to that used by primary switching regulator.
Table 27. Stepper fast decay
MixDecPhX[4:0]
Fast decay percentage
during off time
Unit
Typ
00000 0 %
00001 6.25 %
00010 12.5 %
00011 18.75 %
00100 25 %
00101 31.25 %
00110 37.6 %
00111 43.75 %
01000 50 %
01001 56.25 %
01010 62.5 %
01011 68.75 %
01100 75 %
01101 81.25 %
01110 87.5 %
01111 93.75 %
1xxxx 100 %