this is preliminary information on a new product now in dev elopment or undergoing evaluati on. details are subject to change without notice. december 2014 docid025569 rev 3 1/32 SPV1050 ultralow power energy harv ester and battery charger datasheet - preliminary data features ? transformerless thermoelectric generators and pv modules energy harvester ? high efficiency for any harvesting source ? up to 70 ma maximum battery charging current ? fully integrated buck-boost dc-dc converter ? programmable mppt by external resistors ? 2.6 v to 5.3 v trimmable battery charge voltage level ( 1% accuracy) ? 2.2 v to 3.6 v trimmable battery discharge voltage level ( 1% accuracy) ? two fully independent ldos (1.8 v and 3.3 v output) ? enable/disable ldo control pins ? battery disconnect function for battery protection ? battery connected and ongoing charge logic open drain indication pins applications ? charge any battery chemistry, including lithium based, solid state thin film and super-capacitor. ? wsn, hvac, building and home automation, industrial control, remo te metering, lighting, security, surveillance. ? healthcare and biomedic al sensors, fitness. description the SPV1050 is an ultralow power and high- efficiency energy harvester and battery charger, which implements the mppt function and integrates the switching elements of a buck-boost converter. the SPV1050 device allows the charge of any battery, including the thin film batteries, by tightly monitoring the end-of-charge and the minimum battery voltage in order to avoid the overdischarge and to preserve the battery life. the power manager is suitable for both pv cells and teg harvesting sources, as it covers the input voltage range from 75 mv up to 18 v and guarantees high efficiency in both buck-boost and boost configuration. furthermore the SPV1050 device shows very high flexibility thanks also to the trimming capability of the end-of-charg e and undervoltage protection voltages. in such way any source and battery is matched. the mppt is programmable by a resistor input divider and allows maximizing the source power under any temperature and irradiance condition. an unregulated voltage output is available (e.g. to supply a microcontroller), while two fully independent ldos are embedded for powering sensors and rf transceiver s. both ldos (1.8 v and 3.3 v) can be independently enabled through two dedicated pins. vfqfpn 3 x 3 x 1 mm 20l wlcsp20 www.st.com
contents SPV1050 2/32 docid025569 rev 3 contents 1 block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 2 pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 3 pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 4 maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 5 electrical characteristi cs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 6 functional description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 6.1 battery charger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 6.2 boost configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 6.3 buck-boost configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 6.4 mppt setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 6.5 power manager . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 7 package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 8 ordering information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 9 revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
docid025569 rev 3 3/32 SPV1050 list of tables 32 list of tables table 1. pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 table 2. thermal data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 table 3. absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 table 4. electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 table 5. vfqfpn20 3 x 3 x 1 mm - 20-lead pitch 0.4 packa ge mechanical data . . . . . . . . . . . . . . 28 table 6. wlcsp20, die pads coordinates and pads size. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 table 7. device summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 table 8. document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
list of figures SPV1050 4/32 docid025569 rev 3 list of figures figure 1. block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 figure 2. pin configuration (top through vi ew) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 figure 3. battery management section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 figure 4. boost configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 figure 5. boost startup. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 figure 6. mppt tracking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 figure 7. triggering of v eoc (batt pin floating) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 figure 8. efficiency vs. input current - v oc = 1.0 v . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 figure 9. efficiency vs. input current - v oc = 1.5 v . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 figure 10. efficiency vs. input current - v oc = 2.0 v . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 figure 11. efficiency vs. input current - v oc = 2.5 v . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 figure 12. buck-boost configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 figure 13. buck-boost startup (i in = 5 a) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 figure 14. mppt tracking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 figure 15. efficiency vs. input current - v oc = 6 v . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 figure 16. efficiency vs. input current - v oc = 9 v . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 figure 17. efficiency vs. input current - v oc = 12 v . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 figure 18. efficiency vs. input current - v oc = 15 v . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 figure 19. mppt setup circuitry. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 figure 20. energy harvester equivalent circuit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 figure 21. voltage vs. time at different c values and fixed current . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 figure 22. ldo1 turn on with 100 ma load . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 figure 23. ldo2 turn on with 100 ma load . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 figure 24. vfqfpn20 3 x 3 x 1 mm - 20-lead pitch 0.4 pa ckage outline(1) . . . . . . . . . . . . . . . . . . . . 27 figure 25. wlcsp20, die and pads position (top view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
docid025569 rev 3 5/32 SPV1050 block diagram 32 1 block diagram figure 1. block diagram 3 * 1 ' , 1 b / 9 / ' 2 b ( 1 b b b b b b b b b b % $ 7 7 b & |