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L9663 데이터시트(PDF) 15 Page - STMicroelectronics

부품명 L9663
상세설명  Automotive PSI5 Transceiver IC
PDF  106 Pages
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제조업체  STMICROELECTRONICS [STMicroelectronics]
홈페이지  http://www.st.com
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L9663 데이터시트(HTML) 15 Page - STMicroelectronics

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DS11401 Rev 6
15/106
L9663
Overall description
105
The high supply voltage of the IC can be a battery or a regulated voltage provided by the
ECU.
To reduce disturbances on the voltage supply which might have a negative influence on the
PSIx interface and therefore lead to bit errors, a PI filter can be employed in the supply line.
Possible power supply configurations(b) are:
VB, VASSUP connected to VSUP, VAS and VSYNCx generated by the IC with external
components (as in the above figure);
VAS, VB, VASSUP connected to VSUP, VSYNCx generated by bootstrap, no external
MOS, VGS pin open;
VB, VASSUP, BH1, BH2 connected to VSUP, no external capacitors CBx, VAS
generated by IC pre-regulator and external MOS;
VB connected to VSUP, VASSUP connected to 0V (charge pump off), VAS supplied by
an external source and VSYNCx generated by the IC with external components.
The values of the external components RE2_x, CE_x and CL_x are specified in PSI5
standard.
The assumed line model for the PSI5 interface on which the transceiver IC operates is as
follows:
Figure 5. Supply line model for PSI5
b. The high supply voltage VSUP must be in the correct operative range of connected pins.
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