STMicroelectronics FlexSPIN: SPI configurable stepper and DC multi motor driver evaluation board EVAL6460 EVAL6460 Fiche De Données

Doc ID 17713 Rev 1

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L6460 implements a charge pump regulator to generate a voltage over V

Supply

.This voltage 

is used to drive internal circuits and the external FET driver and cannot be used for any 
other purpose.

This circuit is always under the supervisory circuit control, so no regulator can start before 
the V

Pump

 voltage reaches its undervoltage rising threshold. If V

Pump

 voltage falls down 

below its under voltage falling threshold, all the regulators will be switched off.

The charge pump circuit is disabled when L6460 is in “low power mode”.

An example of capacitors value is: 

C

FLY

 = 100 nF and C

BOOST

 = 1 µF

V3v3 is the output of an internal regulator used to supply some low voltage internal circuits. 
This regulator is not intended to provide external current so it must not be used to supply 
external loads. An external capacitor must always be connected from this pin to GND, 
recommended value is in the range 80 ÷ 120 nF.

Driver 

C

FLY

-

+

CLK

BOOST

Ref

M1

M2

for V

Supply

 lower than 15V, 

external diodes are required