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power-1-title.sch
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v 20140308 2
C 40000 40000 0 0 0 title-A1.sym
T 66100 40800 9 30 1 0 0 0 1
Power Board v4
T 66100 40400 9 8 1 0 0 0 1
power-v4-hw.git/power-1-title.sch
T 66500 40100 9 10 1 0 0 0 1
1
T 68200 40100 9 10 1 0 0 0 1
6
T 70000 40100 9 8 1 0 0 0 1
Richard Barlow <[email protected]>
B 64100 42000 8400 2900 3 50 1 0 -1 -1 0 -1 -1 -1 -1 -1
L 64100 44400 72500 44400 3 0 1 0 -1 -1
L 65300 44900 65300 42000 3 0 1 0 -1 -1
L 64100 43600 72500 43600 3 0 1 0 -1 -1
L 72500 44000 64100 44000 3 0 1 0 -1 -1
T 64700 44500 9 20 1 0 0 3 1
Page
T 68900 44500 9 20 1 0 0 3 1
Description
T 64700 44200 9 10 1 0 0 4 1
1
T 64700 43800 9 10 1 0 0 4 1
2
T 64700 43400 9 10 1 0 0 4 1
3
T 65400 44200 9 10 1 0 0 1 1
Title, Block Diagram
T 65400 43800 9 10 1 0 0 1 1
Battery (Overcurrent and Polarity Protection, Battery Monitoring)
T 65400 43400 9 10 1 0 0 1 1
Supply (Power Switch, UVLO, 3V3 & 5V SMPS, Output Control and Monitoring)
T 40500 40500 9 45 1 0 0 0 2
The full source of this design is available at:
https://www.studentrobotics.org/git/boards/power-v4-hw.git
T 64000 47800 9 40 1 0 0 4 1
USB
V 64000 47800 1100 3 100 1 0 -1 -1 0 -1 -1 -1 -1 -1
T 64000 51400 9 40 1 0 0 4 1
µC
L 63500 57000 63500 56100 4 100 1 0 -1 -1
T 70000 40400 9 10 1 0 0 0 1
B
V 42500 60000 1500 3 100 1 0 -1 -1 0 -1 -1 -1 -1 -1
T 42500 60000 9 40 1 0 0 4 1
Battery
B 45000 58500 4500 3000 3 100 1 0 -1 -1 0 -1 -1 -1 -1 -1
T 47200 60200 9 36 1 0 0 4 3
Overcurrent
and Polarity
Protection
B 50500 58900 4000 2200 3 100 1 0 -1 -1 0 -1 -1 -1 -1 -1
T 52500 60200 9 36 1 0 0 4 2
Battery
Monitoring
B 62000 57100 3000 2200 3 100 1 0 -1 -1 0 -1 -1 -1 -1 -1
T 63500 58200 9 40 1 0 0 4 2
Power
Switch
B 61500 53800 4000 2200 3 100 1 0 -1 -1 0 -1 -1 -1 -1 -1
T 63500 55100 9 36 1 0 0 4 2
3V3 SMPS
+ UVLO
B 67600 53800 3000 2200 3 100 1 0 -1 -1 0 -1 -1 -1 -1 -1
T 69100 55100 9 36 1 0 0 4 2
5V
SMPS
B 62500 50300 3000 2200 3 100 1 0 -1 -1 0 -1 -1 -1 -1 -1
B 66500 50300 5400 2200 3 100 1 0 -1 -1 0 -1 -1 -1 -1 -1
T 69200 51400 9 40 1 0 0 4 2
Output Control
and Monitoring
B 41000 49000 20500 2200 3 100 1 0 -1 -1 0 -1 -1 -1 -1 -1
T 51300 50100 9 40 1 0 0 4 1
12V Output Control and Monitoring
V 42500 45500 1500 3 100 1 0 -1 -1 0 -1 -1 -1 -1 -1
T 42500 45500 9 40 1 0 0 4 2
High
Power
V 49500 45500 1500 3 100 1 0 -1 -1 0 -1 -1 -1 -1 -1
T 49500 45500 9 40 1 0 0 4 2
Low
Power
V 46000 45500 1500 3 100 1 0 -1 -1 0 -1 -1 -1 -1 -1
T 46000 45500 9 40 1 0 0 4 2
High
Power
V 53000 45500 1500 3 100 1 0 -1 -1 0 -1 -1 -1 -1 -1
T 53000 45500 9 40 1 0 0 4 2
Low
Power
V 56500 45500 1500 3 100 1 0 -1 -1 0 -1 -1 -1 -1 -1
V 60000 45500 1500 3 100 1 0 -1 -1 0 -1 -1 -1 -1 -1
T 56500 45500 9 40 1 0 0 4 2
Low
Power
T 60000 45500 9 40 1 0 0 4 2
Low
Power
V 69100 47800 1700 3 100 1 0 -1 -1 0 -1 -1 -1 -1 -1
T 69100 47800 9 40 1 0 0 4 2
Beagle-
Bone
L 44000 60000 45000 60000 4 400 0 0 -1 -1
L 49500 60000 50500 60000 4 400 0 0 -1 -1
L 52500 52500 52500 58700 4 400 1 0 -1 -1
L 51200 52500 51200 51400 4 400 1 0 -1 -1
L 52500 52500 51200 52500 4 400 1 0 -1 -1
L 42500 49000 42500 47000 4 400 0 0 -1 -1
L 46000 49000 46000 47000 4 400 0 0 -1 -1
L 49500 49000 49500 47000 4 200 0 0 -1 -1
L 53000 49000 53000 47000 4 200 0 0 -1 -1
L 56500 49000 56500 47000 4 200 0 0 -1 -1
L 60000 49000 60000 47000 4 200 0 0 -1 -1
L 54600 60000 69100 60000 4 100 1 0 -1 -1
L 63500 59900 63500 59400 4 100 1 0 -1 -1
L 69100 59900 69100 56100 4 100 1 0 -1 -1
L 63500 53700 63500 52600 4 100 1 0 -1 -1
L 69100 53700 69100 52600 4 100 1 0 -1 -1
L 69100 50200 69100 49600 4 100 1 0 -1 -1
L 64000 50200 64000 49000 4 100 1 0 -1 -1
L 65600 51400 66400 51400 4 100 1 0 -1 -1
L 65000 53200 65000 52600 4 100 1 0 -1 -1
L 66500 54900 66500 53200 4 100 1 0 -1 -1
L 66500 53200 65000 53200 4 100 1 0 -1 -1
L 67500 54900 66600 54900 4 100 1 0 -1 -1
L 61600 50700 62400 50700 4 100 1 0 -1 -1
L 53500 52000 62400 52000 4 100 1 0 -1 -1
L 53500 58800 53500 52000 4 100 1 0 -1 -1
L 64100 43200 72500 43200 3 0 1 0 -1 -1
T 64700 43000 9 10 1 0 0 4 1
4
T 65400 43000 9 10 1 0 0 1 1
Output (12V Output Control and Monitoring)
L 64100 42800 72500 42800 3 0 1 0 -1 -1
T 64700 42600 9 10 1 0 0 4 1
5
T 65400 42600 9 10 1 0 0 1 1
Control (µC, USB)
T 51200 49300 9 18 1 0 0 3 1
Iq = 10µA
T 63500 54100 9 18 1 0 0 3 1
Iq = 8µA
T 69100 54100 9 18 1 0 0 3 1
Iq = 2µA
T 52500 59200 9 18 1 0 0 3 1
Iq = 0.4µA
T 47200 58800 9 18 1 0 0 3 1
Iq = 0.4µA
T 41500 57500 9 14 1 0 0 2 9
The UVLO activates when the cell voltage reaches ~3.2V (9.6V total),
leaving around 20mAh of charge in the battery (2200mAh battery).
If the board has been left switched on the quiescent current at 9.6V will
be ~21µA, giving a run time of approximately 40 days until the battery is
potentially damaged.
If the board has been switched off with the battery at 50% the quiescent
current will be ~13µA, giving a run time of approximately 9.5 years.
L 64100 42400 72500 42400 3 0 1 0 -1 -1
T 64700 42200 9 10 1 0 0 4 1
6
T 65400 42200 9 10 1 0 0 1 1
Mechanical