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L9300 Datasheet(PDF) 55 Page - STMicroelectronics

Part # L9300
Description  Automotive flexible U-chip for braking and transmission
PDF  178 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L9300 Datasheet(HTML) 55 Page - STMicroelectronics

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Figure 32. Driver timing chart HS_config=0, SW_cntr=1
INx
INx_in_ft
LOADx_toffXX
LOADx_tonXX
80%
20%
Trigger for average
current calculation
Average current calculation interval
LOADx
GADG1807171514PS
Figure 33. Driver timing chart HS_config=1, SW_cntr=1
INx
INx_in_ft
LOADx_tonXX
LOADx_toffXX
80%
20%
Trigger for average
current calculation
Average current calculation interval
LOADx
GADG1807171519PS
10.1.1.3
Solenoid current feedback
Solenoid computed average current, sensed through internal current sense amplifier, is available for SPI reading
in the AVGCUR register; the current information is stored in 11 bits.
AVGCUR is the average current post processed by the control algorithm over an entire PWM period. The Average
current is updated every PWM cycle. The calculation starts when PWM raises and stops when a new PWM
raises.
Table 32. Average current configuration
AVGCURR
Load target current HILOAD = 0
[bit resolution = 1500/2047 = 0.733 mA]
Load target current HILOAD = 1
[bit resolution = 2000/2047 = 0.9770 mA]
0
0 [mA]
0 [mA]
1
1 * 0,733 [mA]
1 * 0,977 [mA]
2
2 * 0,733 [mA]
2 * 0,977 [mA]
…
…
…
2046
2046 * 0,733 [mA]
2046 * 0,977 [mA]
2047
1500 [mA]
2000 [mA]
L9300
Valve drivers
DS12258 - Rev 5
page 55/178



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