#2 [Schematics] Swap MOXVAR standalone TVS for non-MOXVAR

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opened 5 years ago by Houkime · 3 comments
Houkime commented 5 years ago

Metal-Oxide Varistors are known to develop leakages over time which will shorten device lifespan if not fixed. Also size of currently used TVS is far from optimal.

Metal-Oxide Varistors are known to develop leakages over time which will shorten device lifespan if not fixed. Also size of currently used TVS is far from optimal.
Houkime commented 4 years ago
Owner

Candidates:

  • ESDA5-1F4

https://eu.mouser.com/datasheet/2/389/esda5-1f4-1156271.pdf

  • Transil Transzorb
Candidates: * ESDA5-1F4 https://eu.mouser.com/datasheet/2/389/esda5-1f4-1156271.pdf * Transil Transzorb
Houkime commented 4 years ago
Owner

Replaced a MOXVAR guarding flash LED with VCUT07B1-HD1. ESDA5-1F4 wasn't enough for it since it needs maximum of 6.8V when working. VCUT07B1-HD1 is 7V standoff, 7.3V break down and 12V clamping (at 1A).

Other variant (in case VCUT07B1-HD1 is a problem) is PTVS7V5Z1USK (8.3V breakdown voltage 13V clamp)

Replaced a MOXVAR guarding flash LED with VCUT07B1-HD1. ESDA5-1F4 wasn't enough for it since it needs maximum of 6.8V when working. VCUT07B1-HD1 is 7V standoff, 7.3V break down and 12V clamping (at 1A). Other variant (in case VCUT07B1-HD1 is a problem) is PTVS7V5Z1USK (8.3V breakdown voltage 13V clamp)
Houkime commented 4 years ago
Owner

Remaining (around 20 pcs) MOXVARs were replaced with ESDA5-1F4 in a38086a042

This also should alleviate #4

Remaining (around 20 pcs) MOXVARs were replaced with ESDA5-1F4 in https://notabug.org/Houkime/Neo900/commit/a38086a04200d4ad8b3ead7f12b3c4e884ae5567 This also should alleviate https://notabug.org/Houkime/Neo900/issues/4
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