STEVAL-ISV006V2 STMicroelectronics

STEVAL-ISV006V2 Up to 5 W solar battery charger with embedded MPPT based on the SPV1040 Data brief Features High-efficiency monolithic step-up DC-DC converter Proprietary perturb & observe embedded MPPT algorithm Very low input voltage (down to 0.3 V) Integrated N-channel and P-channel MOSFETs with low R resistance ON Overcurrent and overtemperature protection Input reverse polarity protection LED charge status indicator RoHS compliant STEVAL-ISV006V2 Description The STEVAL-ISV006V2 demonstration board is supplied by a PV panel with P of 200 mW, PK The STEVAL-ISV006V2 demonstration board is which can be replaced with PV panels with P PK based on the SPV1040 high efficiency solar up to 5 W (V < 5 V) depending on application OC battery charger with embedded MPPT. The requirements. SPV1040 device is a low power, low voltage, The output load is a 220 mF, 5.5 V super- monolithic step-up converter with an input voltage capacitor that can be replaced with lead-acid, range from 0.3 V to 5.5 V, and is capable of NiCd or NiMh rechargeable batteries (max maximizing the energy generated by even a single voltage = 5 and > V of the selected PV panel). solar cell (or fuel cell), where low input voltage OC handling capability is extremely important. The demonstration board provides a simple charge status indicator using 2 LEDs, and 3 Thanks to the embedded MPPT algorithm, even trimmers are available to allow setup according to under varying environmental conditions (such as the specific application requirements. irradiation, dirt, temperature) the SPV1040 offers maximum efficiency in terms of power harvested from the cells and transferred to the output. The device employs an input voltage regulation loop, which fixes the charging battery voltage via a resistor divider. The maximum output current is set with a current sense resistor according to charging current requirements. The SPV1040 protects itself and other application devices by stopping the PWM switching if either the maximum current threshold (up to 2 A) is reached or the maximum temperature limit (up to 155 C) is exceeded. October 2011 Doc ID 018650 Rev 3 1/4 For further information contact your local STMicroelectronics sales office. www.st.com 4 Schematic diagram STEVAL-ISV006V2 1 Schematic diagram Figure 1. STEVAL-ISV006V2 circuit schematic optional V BAT+ J 1 C OUT Battery Charge Control circuit Lx PV+ R S Lx V OUT XX SHUT R V F1 LOAD+ I XSHUT CTRL PLUS R 1 VR 10 R C R 5 F F2 GND I CTRL MINUS R 3 J28 Super MPPMPP-SSETET V C D Cap CTRL IN OUT VR 2 C C 4 2 VR R 9 4 V PV- R LOAD- 1111 V BAT- AM06706v1 2/4 Doc ID 018650 Rev 3