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): 64/139頁
文件大小: 3837K
代理商: L6460TR
Internal supplies
L6460
30/139
Doc ID 17713 Rev 1
4
Internal supplies
L6460 includes three internal regulators used to provide a regulated voltage to internal
circuits.
The internal regulators are the following:
- VSupplyInt regulator.
- Charge pump regulator.
- V3v3 regulator.
4.1
VSupplyInt regulator
VSupplyInt is the output of an internal regulator used to supply some 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 to this pin (preferably towards
VSupply pin), recommended value is in the range 80 ÷ 120 nF.
Figure 3.
VSupplyInt pin
The VSupplyInt pin may also be externally connected to VSupply pin by means of an external
resistor REXT: this allows REXT, particularly when VSupply is at the max values of the
operative supply range, to dissipate power that otherwise would be dissipated inside the
chip. The choice of the optimal resistor depends on the application since it is strictly
depending on both VSupply and the current used inside the chip (that is changing with the
chosen configuration).
R
EXT could be chosen by applying this formula: REXT = (VSupply min - VS_Int max)/(IS_Int max).
I
S_Int max is depending from the chosen configuration and represents the total current needed
by the circuits connected to this pin.
For example, with V
Supply = 32 V and IS_Int = 12 mA a typical resistor value is 1 kΩ.
VsupplyInt
IS_Int_TYP
Vsupply
GND
internal
circuits
L6460
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