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AN4050

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DocID022816 Rev 3

Revision history

Table 2: Document revision history

Date

Version

Changes

11-Jun-2012

Initial release.

21-Mar-2013

Updated Figure 5: SPV1040 internal block diagram.

05-Dec-2017

Text and formatting changes throughout document.

Updated

Section 5: "Bill of materials"

Содержание STEVAL-ISV012V1

Страница 1: ...1 STEVAL ISV012V1 evaluation board The board is designed to charge lithium ion and lithium polymer batteries with VBATT_max 4 1 or 4 2 V and it includes a 400 mWpk polycrystalline PV panel SZGD6060 4...

Страница 2: ...cID022816 Rev 3 Contents 1 SPV1040 operation 4 2 L6924D operation 6 2 1 L6924D operation in solar powered applications 6 3 Reference design description 10 4 Schematic diagrams 12 5 Bill of materials 1...

Страница 3: ...harge curve in Quasi pulse mode 7 Figure 8 Battery charging at low irradiation 8 Figure 9 Battery charging at low irradiation zoom 8 Figure 10 Maximum available current vs Pin 200 mW peak PV panel 9 F...

Страница 4: ...output voltage and current The converter guarantees the safety of the overall application and its own by stopping PWM switching in case of an overvoltage overcurrent or overtemperature condition The I...

Страница 5: ...tput voltage regulation VCTRL pin triggers the 1 25 V internal reference Output current limitation RS ICTRL_PLUS ICTRL_MINUS 50 mV MPP SET voltage VMPP SET 300 mV at startup and VMPP SET 450 mV in run...

Страница 6: ...uce the current until the charge termination has completed Regardless of the charging approach a closed loop thermal control features protects the device from overheating The L6924D allows the user to...

Страница 7: ...power MOSFET of the charger In this mode the L6924D charges the battery with the same three phases as in linear mode but power dissipation is greatly reduced as shown in the following figure Figure 7...

Страница 8: ...it is possible that D1 starts flickering or appearing ON at lower irradiation levels while D2 is ON as well This is due to the battery charger which tries to charge the battery at 4 2 V or 4 1 V depen...

Страница 9: ...vs Pin 200 mW peak PV panel Figure 11 Maximum available current vs Pin 2 W peak PV panel 0 10 20 30 40 50 60 70 80 0 50 100 150 200 250 300 350 400 Pin mW Iout max mA Vout 4 5V 0 50 100 150 200 250 30...

Страница 10: ...from ISOTECH Figure 13 V I and P V plot diagrams Figure 14 Partial charge and Figure 15 Full charge show the partial and full charge curves respectively The partial charge curve shows charge current...

Страница 11: ...85 94 for SPV1040 and 90 for L6924D Figure 14 Partial charge Figure 15 Full charge 0 20 40 60 80 100 120 0 0 5 1 1 5 2 2 5 3 3 5 4 4 5 0 50 100 150 200 250 300 Output Current mA Output Voltage V Time...

Страница 12: ...fault open PV SHDWN TH Voprg Vosns Vo Iend Vpre Iprg Ipre PV VOUT_SPV1040 mc2 mc1 VREF VBAT NTC PV PV VREF VBAT PV R16 DNM R9 470 Ohm SW3 1 3 2 R15 DNM SW4 1 3 2 D1 D1 R6 1k Ohm R6 1k Ohm 4 7uF C9 R12...

Страница 13: ...4F5 0A VOUT_SPV1040 VIN_sns PV LX_1040 Vctrl Ictrl Ictrl X_SHUT Vctrl Vrs Vrs Ictrl Ictrl Vrs Vrs VIN_sns PV RF2 1k RF2 1k C2 1nF C2 1nF TP1 TP1 CF1 1uF CF1 1uF Cout1 10uF Cout1 10uF TP2 TP2 R2 820k R...

Страница 14: ...PAC7800 5 1 R3 1 k 0805 Resistor Vishay CRCW08051 K00FKEA 6 1 R4 3 3 m 63M Resistor DNM 7 1 L1 10 H Isat 1 5 A at vmp 2 V 2220 EIA Power inductor Coilcraft MSS7341 103ML EPCOS B82442T110 3K050 8 1 VRS...

Страница 15: ...5 Ceramic capacitors Kemet C0805C476M 9PAC7800 20 1 C7 10 nF 50 V 0805 Ceramic capacitors Kemet C0805C103K 5RAC 21 1 C8 1 nF 50 V 0805 Multilayer ceramic capacitor Kemet C0805C102K 5RAC 22 1 C9 4 7 F...

Страница 16: ...on history Table 2 Document revision history Date Version Changes 11 Jun 2012 1 Initial release 21 Mar 2013 2 Updated Figure 5 SPV1040 internal block diagram 05 Dec 2017 3 Text and formatting changes...

Страница 17: ...sers are solely responsible for the choice selection and use of ST products and ST assumes no liability for application assistance or the design of Purchasers products No license express or implied to...

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