L6460 View Datasheet(PDF) - STMicroelectronics
Part Name
Description
MFG CO.
'L6460' PDF : 139 Pages View PDF
L6460
4.2
Internal supplies
Charge pump regulator
L6460 implements a charge pump regulator to generate a voltage over VSupply.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 VPump voltage reaches its undervoltage rising threshold. If VPump 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”.
Figure 4. Charge pump block diagram
VSupplyInt
VSupply
CBOOST
VPump
4.3
EnVPump
M2
Driver
M1
CPH
CPL
for VSupply lower than 15V,
external diodes are required
CFLY
-
+ Ref
CLKBOOST
An example of capacitors value is: CFLY = 100 nF and CBOOST = 1 µF
V3v3 regulator
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.
Doc ID 17713 Rev 1
31/139
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