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L9969X Datasheet(PDF) 35 Page - STMicroelectronics

Part # L9969X
Description  Automotive chip for single and dual H-bridge
PDF  70 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L9969X Datasheet(HTML) 35 Page - STMicroelectronics

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Figure 22. Principle of the short circuit across load detection (OVC on LS1 when PWM = 1)
Device enabled and working: HS2 and LS1 are ON
OVC occurs on LS1
LS1 is immediately turned OFF (t_DF_off)
HS2 is turned OFF too after t_DF_del
Drivers are turned ON again after t_retest
OVC occurs on LS1?
LS1 is immediately turned OFF (t_DF_off)
HS2 is turned OFF too after t_DF_del
LS1 Driver is turned ON again after t_SC
With HS2 OFF
OVC occurs on LS1?
LS1 is immediately turned OFF (t_DF_off)
SCB is asserted on DIA1_REG
SCL is asserted on DIA1_REG
NO
YES
NO
YES
Attempt to restart
Short discrimination
L9969x
Functional description
DS14029 - Rev 6
page 35/70



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