L99DZ120 datasheet(88/162 Pages) STMICROELECTRONICS

部品番号	L99DZ120

部品情報	Automotive door actuator driver with embedded LIN

PDF	162 Pages

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メーカー	STMICROELECTRONICS [STMicroelectronics]

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L99DZ120

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DocID029145 Rev 4

monitor event may start the filter time. The threshold voltage VSCd_HB can be programmed

using the SPI bits DIAG_x (CR 10).

Figure 38. H-bridge diagnosis

4.27

H-bridge monitoring in off-mode

The drain source voltages of the H-bridge driver external transistors can be monitored, while

the transistors are switched off. If either bit OL_H1L2 (CR 10) or OL_H2L1 (CR 10) is set to

1, while bit HEN (CR 1) = 1, the H-drivers enter resistive low mode and the drain-source

voltages can be monitored. Since the pull-up resistance is equal to the pull-down resistance

on both sides of the bridge a voltage of 2/3 VS on the pull-up highside and 1/3 VS on the low-

side is expected, if they drive a low-resistive inductive load (e.g. motor). If the drain source

voltage on each of these Power-MOS is less than 1/6 VS, the drain-source monitor bit of the

associated driver is set.

The open-load filter time is tOL_HB.

L99DZ120 データシート(PDF) 88 Page - STMicroelectronics