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L9300 bảng dữ liệu(PDF) 48 Page - STMicroelectronics

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Giải thích chi tiết về linh kiện  Automotive flexible U-chip for braking and transmission
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L9300 bảng dữ liệu(HTML) 48 Page - STMicroelectronics

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10
Valve drivers
10.1
Solenoid driver
10.1.1
Solenoid driver functional description
The device provides 6 current control channels. Each channel includes the driving transistor, the recirculation
transistor and the current sensing structure and can work in low–side driving mode with high–side recirculation or
in high–side driving mode with low–side recirculation, as reported in Figure 27.
The LS or HS mode is configured through an SPI bit.
If HS_config_x = 0 (default) low–side mode is enabled (the load is connected to VS), if HS_config_x = 1, high–
side mode is activated (the load is connected to ground).
Channels can be configured independently as high–side or low–side, however channel configuration is managed
by channel pairs and on a single pair not all the configurations are possible: in case HS/LS configuration is
needed the first channel must be LS and the second channel HS.
Table 28. First and second channel configurations
First channel configuration
Second channel configuration
HS
HS
Allowed
LS
HS
Allowed
HS
LS
Forbidden
LS
LS
Allowed
The microcontroller can inhibit solenoid activation by means of the EN_DR input pin: if this pin is kept low the
solenoid is kept in disable condition; to avoid spurious event on EN_DR input pin, a de-glitch filter is present.
L9300
Valve drivers
DS12258 - Rev 5
page 48/178



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