From: Bdale Garbee <bdale@gag.com>
Date: Wed, 8 Jan 2020 18:34:49 +0000 (-0700)
Subject: update comment on GPS backup current limiting resistor
X-Git-Tag: fab-v4.0~3
X-Git-Url: https://git.gag.com/?a=commitdiff_plain;h=0896ad379417fa8fe01e01605605b0dc902891dc;p=hw%2Ftelemega

update comment on GPS backup current limiting resistor
---

diff --git a/telemega.sch b/telemega.sch
index 53ec6f2..490ae56 100644
--- a/telemega.sch
+++ b/telemega.sch
@@ -2316,13 +2316,14 @@ N 76600 66100 77000 66100 4
 N 77000 66100 77000 66200 4
 N 76600 66100 76200 66100 4
 N 76200 66100 76200 66200 4
-T 72000 65500 9 10 1 0 0 0 6
+T 71900 65200 9 10 1 0 0 0 7
 v_charge can be 4.2 volts
 v_bckp must be 1.4 - 3.6 volts
-i_bckp on the order of 22uA
+i_bckp on the order of 15uA
 
-56k should drop 1.232 volts,
-and consume 27 microwatts
+We could use up to 80k here, 
+but 56k should drop 0.84 volts,
+which is sufficient.
 C 73800 67100 1 180 0 resistor.sym
 {
 T 73500 66700 5 10 0 0 180 0 1