{"id":896,"date":"2012-05-03T09:12:53","date_gmt":"2012-05-03T09:12:53","guid":{"rendered":"https:\/\/ibex.tech\/resources\/?p=896"},"modified":"2022-02-18T15:05:17","modified_gmt":"2022-02-18T15:05:17","slug":"pc-power-supplies","status":"publish","type":"post","link":"https:\/\/ibex.tech\/resources\/geek-area\/electronics\/power-supply\/pc-power-supplies","title":{"rendered":"PC Power Supplies"},"content":{"rendered":"

AT Power Supply (original IBM PC XT AT standard)<\/h4>\n

Connections:<\/p>\n

Ground (0V)<\/p>\n

+5 V<\/p>\n

+12 V (typically for disk drives and cooling fans)<\/p>\n

-5 V (typically for peripherals on the ISA bus)<\/p>\n

-12 V (typically for RS-232 serial port negative rail)<\/p>\n

Power Good – pin used to prevent digital circuitry operating while the power supply turns on and output is not yet properly stable.<\/p>\n

Typical power rating 63.5 watts (most of it on the +5 V rail)<\/p>\n

Power is turned on and off at the mains (no energy saving low-power mode).<\/p>\n

Wikipedia<\/a><\/p>\n

ATX Power Supply<\/h4>\n

Connections:<\/p>\n

Ground (0V)<\/p>\n

+3.3 V<\/p>\n

+3.3 V sense (should be connected to the +3.3 V at the motherboard to allow for remote sensing of the voltage drop in the power supply wiring)<\/p>\n

+5 V<\/p>\n

+12 V<\/p>\n

-5 V – absent in current power supplies (optional in ATX and ATX12V ver. 1.2, and deleted as of ver. 1.3)<\/p>\n

-12 V<\/p>\n

Power good (PWR_OK) – low when other outputs have not yet reached, or are about to leave, correct voltages (typically remains low for 100\u2013500 ms after the PS_ON# signal is pulled low)<\/p>\n

Power on (PS_ON#)- pulled up to +5 V by the PSU, motherboard drives low to turn on the PSU.<\/p>\n

+5 V standby (+5VSB) – provides a small amount of standby power when the computer is “off”<\/p>\n

Positive supply voltages must be within \u00b15% of their nominal values at all times. Negative supply voltages must be within \u00b110%.<\/p>\n

Wikipedia<\/a><\/p>\n

 <\/p>\n","protected":false},"excerpt":{"rendered":"

AT Power Supply (original IBM PC XT AT standard) Connections: Ground (0V) +5 V +12 V (typically for disk drives and cooling fans) -5 V (typically for peripherals on the ISA bus) -12 V (typically for RS-232 serial port negative rail) Power Good – pin used to prevent digital circuitry operating while the power supply […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[47],"tags":[],"class_list":["post-896","post","type-post","status-publish","format-standard","hentry","category-power-supply"],"_links":{"self":[{"href":"https:\/\/ibex.tech\/resources\/wp-json\/wp\/v2\/posts\/896","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ibex.tech\/resources\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ibex.tech\/resources\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ibex.tech\/resources\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/ibex.tech\/resources\/wp-json\/wp\/v2\/comments?post=896"}],"version-history":[{"count":5,"href":"https:\/\/ibex.tech\/resources\/wp-json\/wp\/v2\/posts\/896\/revisions"}],"predecessor-version":[{"id":2509,"href":"https:\/\/ibex.tech\/resources\/wp-json\/wp\/v2\/posts\/896\/revisions\/2509"}],"wp:attachment":[{"href":"https:\/\/ibex.tech\/resources\/wp-json\/wp\/v2\/media?parent=896"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ibex.tech\/resources\/wp-json\/wp\/v2\/categories?post=896"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ibex.tech\/resources\/wp-json\/wp\/v2\/tags?post=896"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}