{"action":"opened","issue":{"url":"https://api.github.com/repos/sinara-hw/Booster/issues/77","repository_url":"https://api.github.com/repos/sinara-hw/Booster","labels_url":"https://api.github.com/repos/sinara-hw/Booster/issues/77/labels{/name}","comments_url":"https://api.github.com/repos/sinara-hw/Booster/issues/77/comments","events_url":"https://api.github.com/repos/sinara-hw/Booster/issues/77/events","html_url":"https://github.com/sinara-hw/Booster/issues/77","id":357996232,"node_id":"MDU6SXNzdWUzNTc5OTYyMzI=","number":77,"title":"Hardware interlock","user":{"login":"hartytp","id":21218399,"node_id":"MDQ6VXNlcjIxMjE4Mzk5","avatar_url":"https://avatars0.githubusercontent.com/u/21218399?v=4","gravatar_id":"","url":"https://api.github.com/users/hartytp","html_url":"https://github.com/hartytp","followers_url":"https://api.github.com/users/hartytp/followers","following_url":"https://api.github.com/users/hartytp/following{/other_user}","gists_url":"https://api.github.com/users/hartytp/gists{/gist_id}","starred_url":"https://api.github.com/users/hartytp/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/hartytp/subscriptions","organizations_url":"https://api.github.com/users/hartytp/orgs","repos_url":"https://api.github.com/users/hartytp/repos","events_url":"https://api.github.com/users/hartytp/events{/privacy}","received_events_url":"https://api.github.com/users/hartytp/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"assignees":[],"milestone":null,"comments":0,"created_at":"2018-09-07T09:44:41Z","updated_at":"2018-09-07T09:44:41Z","closed_at":null,"author_association":"COLLABORATOR","body":"Context:\r\n- We want a hardware interlock for the output power in Booster instead of just having a software interlock\r\n- the hardware interlock will be much faster responding than a software interlock, making it better at protecting sensitive loads. Let's aim for a response time of <100us as an absolute maximum. Ideally, let's go for < 10us\r\n- the hardware interlock also means that Booster will still protect sensitive loads in case the firmware crashes\r\n- currently, the hardware interlock is provided using the [ADL5904](http://www.analog.com/media/en/technical-documentation/data-sheets/adl5904.pdf) power detector's internal comparator. That's annoying because the required threshold voltage is quite low and the threshold input requires quite a bit of current, making it inconvenient to drivewithout a negative supply rail.\r\n\r\nSo, let's see if we can do this instead using the power detector's analog output and an external comparator. I'll post some details in this issue"}}
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