About DDeye.1

DDeye.1 · 2019-12-19

Our circuit uses an L99MC6 6-ch driver in 3-ch bridged mode to drive 3 relays (Song Chuan p/n 301-1A-C-R1-U03-12VDC) with a common +12V rail connected to the relays. The relays are activated by a sink output. The circuit's 3.3V logic Vcc is temporari...

DDeye.1 · 2020-02-13

ok. In separate cases I will remove the S3M, I can monitor DRN1's current during this event, and temporarily disconnect SRC1,2,3 from all L99MC6s. I will get back to you once I try these tests.Thank you for your answer. Dennis

DDeye.1 · 2020-02-12

Hi Salvo,Attached are scope images of the L99MC6 DRN1 voltage rail, 6.0V switching regulator and the 3.3V microcontroller rail. The first scope capture is a normal power up sequence with open half-H outputs. Nothing connected to the outputs. This ...

DDeye.1 · 2020-02-11

Hi Salvo,I carefully read your response and will provide answers to your questions. Forgive the long response. There is a lot to discuss.L99MC6 is supposed to be power up with proper sequence. When high side driver is used (all outputs are used in ...

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We are running into an L99MC6 caution (lowest caution on page 12 of Doc ID 16523 Rev 1) where our +13.8V supply is bleeding back through relay coils to source outputs and elevating the 3.3V Vcc supply before the charge pump seems to ramp up). Workarounds?

Re: We are running into an L99MC6 caution (lowest caution on page 12 of Doc ID 16523 Rev 1) where our +13.8V supply is bleeding back through relay coils to source outputs and elevating the 3.3V Vcc supply before the charge pump seems to ramp up). Workarounds?

Re: We are running into an L99MC6 caution (lowest caution on page 12 of Doc ID 16523 Rev 1) where our +13.8V supply is bleeding back through relay coils to source outputs and elevating the 3.3V Vcc supply before the charge pump seems to ramp up). Workarounds?

Re: We are running into an L99MC6 caution (lowest caution on page 12 of Doc ID 16523 Rev 1) where our +13.8V supply is bleeding back through relay coils to source outputs and elevating the 3.3V Vcc supply before the charge pump seems to ramp up). Workarounds?