參數(shù)資料
型號： L6460TR
廠商： STMICROELECTRONICS
元件分類： 運動控制電子
英文描述： STEPPER MOTOR CONTROLLER, PQFP64
封裝： 10 X 10 MM, 1 MM HEIGHT, ROHS COMPLIANT, TQFP-64
文件頁數(shù)： 65/139頁
文件大?。?/td> 3837K
代理商： L6460TR
L6460
Internal supplies
Doc ID 17713 Rev 1
31/139
4.2
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 “l(fā)ow power mode”.
Figure 4.
Charge pump block diagram
An example of capacitors value is:
C
FLY = 100 nF and CBOOST = 1 F
4.3
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.
Driver
CFLY
-
+
CPH
VSupply
CPL
VPump
CBOOST
CLKBOOST
EnVPump
Ref
M1
M2
VSupplyInt
for VSupply lower than 15V,
external diodes are required
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