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L9177 Datasheet(PDF) 40 Page - STMicroelectronics

Part # L9177
Description  Peripheral on chip for low end engine control
PDF  49 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L9177 Datasheet(HTML) 40 Page - STMicroelectronics

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Functional description
L9177
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DocID17617 Rev 1
Note:
Hysteresis voltages are achieved injecting an hysteresis bias current on VRIN ± external
resistors (typ. 10 kΩ each, see Figure 38 application circuit). Resulting HV voltage is
HV = I_hys*Rtyp. Changing the value of R would change in a linear mode the hysteresis
value.
Figure 32. Input-output behaviour of VRS interface
Table 32. Peak voltage detector precision
Pick voltage [PV]
Value
Unit
Min.
Typ.
Max.
PV1
850
900
950
mV
PV2
1452
1560
1638
mV
PV3
2118
2230
2341
mV
PV4
2755
2900
3045
mV
Table 33. Hysteresis threshold precision
Pick voltage [PV]
Value
Unit
Min.
Typ.
Max.
H0
70
100
130
mV
HV1
140
200
220
mV
HV2
250
347
390
mV
HV3
490
644
720
mV
HV4
730
1000
1120
mV



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