Difference between revisions of "Gps1"
From DIDEAS Wiki
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==LCD back light== | ==LCD back light== | ||
| − | *3.8 - 4.2V @ 240mA max | + | *3.8 - 4.2V @ 240mA max, |
*LTC3454 - LED driver. | *LTC3454 - LED driver. | ||
| Line 21: | Line 21: | ||
== GPS== | == GPS== | ||
| − | *direct to LiPo | + | *direct to LiPo, |
| + | *or through LDO - TPS780xx Iq=500nA, 150mA output. | ||
| + | *TPS735xx 25mW @ 50mA, 500mA max, IQ 46uA | ||
| + | *TPS734xx 25mV @ 50mA, 250mA IQ 44ua | ||
| + | *TPS799xx 25mV @ 50mA, 200mA, 40uA | ||
| + | |||
* LOCOSYS LS20031/33 - direct Lipo connections! (41/44 mA) | * LOCOSYS LS20031/33 - direct Lipo connections! (41/44 mA) | ||
Revision as of 20:56, 16 July 2009
Contents
power management
- 3 to 4.2 LiPo (1.3 Ahr) - 26 hrs @ 50mA
- Need upower LV cutoff.
Battery charger
- LT3650-8.2 [[1]]
LCD display
- 5V @ 1.5mA
- TPS61220 boost converter - very efficient at lite load
LCD back light
- 3.8 - 4.2V @ 240mA max,
- LTC3454 - LED driver.
dsPICsupply
- 3.0V @ upto 100mA GPS
- TPS63030 (buck - boost)
GPS
- direct to LiPo,
- or through LDO - TPS780xx Iq=500nA, 150mA output.
- TPS735xx 25mW @ 50mA, 500mA max, IQ 46uA
- TPS734xx 25mV @ 50mA, 250mA IQ 44ua
- TPS799xx 25mV @ 50mA, 200mA, 40uA
- LOCOSYS LS20031/33 - direct Lipo connections! (41/44 mA)
