LS0 Fault of S12VR

jasoncao — Tue, 03 Jan 2017 08:52:04 GMT

Hi,

There are some product whose LS0 Pin get out of control.We use S12VR for ANTI PINCH,and the LS0 is used to control the Relay.

Could tell me what reason may result the LS0 pin get out of control?

Thank you very much.

Re: LS0 Fault of S12VR

RadekS — Wed, 04 Jan 2017 16:39:46 GMT

Hi Jason,

Could you please specify what you mean by “the LS0 pin get out of control”?

Do you mean that the code works correctly, but low side switch does not react on LSDR_LSDR0 bit modification? Or code do not react on external request?

Is it temporary failure (until MCU reset) or permanent (MCU replacement is necessary)?

Each low-side driver has an over-current detection while enabled with a current threshold of ILIMLSX. If over-current is detected the related interrupt flag (LSOCIF1 or LSOCIF0) is set in the LSDRV Interrupt Flag Register (LSIF). As long as the over-current interrupt flag remains set the related low-side driver is turned off to protect the circuit.Clearing the related over-current interrupt flag returns back the control of the driver to the selected source in the PIM module.

Additionally, there is an active clamp (for driving relays) protecting each driver stage. The active clamp will turn on a low-side FET if the voltage on a pin exceeds VCLAMP (min. 40V) when the driver is turned off.

If possible, please specify also MCU maskset and share schematic for short check for any obvious/potential issue.

I hope it helps you.

Have a great day,
Radek

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S12 / MagniV MicrocontrollersのトピックLS0 Fault of S12VR

LS0 Fault of S12VR

Re: LS0 Fault of S12VR