NH2D0245 EVAL BOARD

Preliminary Datasheet | NH2D0245 - Energy Harvesting PMIC Revision 1.0 - December, 2021 NH2D0245 Energy Harvesting PMIC 1. Description The NH2D0245 is a high-performance energy harvesting solution for low-power applications. The NH2D0245 harvests energy generated by a source, for instance, photo-voltaic (PV) cell, or a piezo-electric harvester with a rectifier. The energy charges a storage element such as a rechargeable battery or a supercapacitor. Nowi’s advanced maximum power point tracking (MPPT) uses an embedded hill-climbing algorithm to deliver the maximum power to the load. The MPPT is designed to be independent of specific characteristics of the harvesters, therefore any harvester that fits the specifications of the chip can be used. Moreover, the MPPT circuit can detect the maximum power point with an interval of 1 second resulting in maximum efficiency in various environments where energy can rapidly change over time. The NH2D0245 is available in a 16-lead, 3mm × 3mm QFN package. 2. Key Features 3. Applications • • • • • • • • • • • • • High-efficiency low-power DC-DC converter Harvesting power range 10 μW to 2 mW Advanced MPPT to maximize efficiency Ultra-fast MPPT interval of 1 second Small BOM with no external coil required Multiple battery and storage elements compatibility Wireless IoT devices Smart remote controls Electronic shelf labels Wearable devices Industrial and environmental monitoring Consumer electronics Beacons 4. Typical Application Figure 1: Typical PV-Cell Application © 2021 Nowi B.V. 1 Preliminary Datasheet | NH2D0245 - Energy Harvesting PMIC Revision 1.0 - December, 2021 5. Package Diagram and Pin Description Figure 2: QFN16 3x3 mm package Table 1: Pin Description PIN # PIN NAME 1 N.C. 2 ENABLE 3 VREF Decoupling for internal supply generation. No external load supported 4 GND Ground 5 VBAT Output of the energy harvester and device supply 6 GND Ground 7 GND Ground 8 PWRS Control input for power-range setting 9 R0 Control input for power-range setting 10 R1 Control input for power-range setting 11 R2 Control input for power-range setting 12 VBAT Output of the energy harvester and device supply 13 GND Ground 14 DCIN DC input of energy harvester © 2021 Nowi B.V. DESCRIPTION Not connected. Can be left floating or grounded Enable pin, active low 2 Preliminary Datasheet | NH2D0245 - Energy Harvesting PMIC Revision 1.0 - December, 2021 Continuation of Table 1 PIN # PIN NAME DESCRIPTION 15 SYS_RDY System Ready output. Indicates (HIGH) when start-up of device is ready 16 Reserved Reserved, should be left floating PAD GND Ground 6. Power Settings Table 2: Power Settings MODE INPUT POWER RANGE PWRS R2 R1 R0 Low Power 10 μW to 1 mW 0 0 0 0 High Power 20 μW to 2 mW 1 1 1 0 Other combinations are not supported 7. Block Diagram Figure 3: NH2D0245 block diagram © 2021 Nowi B.V. 3 Preliminary Datasheet | NH2D0245 - Energy Harvesting PMIC Revision 1.0 - December, 2021 8. Absolute Maximum Ratings Table 3: Absolute Maximum Ratings MIN MAX UNIT -0.3 5 V DCIN Input Voltage VBAT +0.3 V DCIN Input Current 100 mA DCIN , VBAT , ENABLE, R0, R1, R2, PWRS ESD voltage, Human Body Model (HBM) 1000 V Operating junction temperature range -50 125 °C Storage temperature -65 150 °C Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, which do not imply functional operation of the device at these or any other conditions beyond those indicated under Recommended Operating Conditions. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. 9. Recommended Operating Ratings Table 4: Recommended Operating Ratings MIN MAX UNIT VBAT 2.5 4.5 V Ambient temperature, TA -40 85 °C VALUE UNIT Junction-to-ambient thermal resistance 30 °C/W Junction-to-case (top) thermal resistance 49 °C/W 10. Thermal Information Table 5: Thermal specifications THERMAL METRIC RθJA RθJC(top) © 2021 Nowi B.V. 4 Preliminary Datasheet | NH2D0245 - Energy Harvesting PMIC Revision 1.0 - December, 2021 11. Electrical Characteristics VBAT = 3V, VOC = 3V, TA = 25°C unless otherwise specified. Table 6: Electrical Specifications SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNIT Supplies and Start-up VBAT Minimum battery voltage To startup SYS_RDY becomes high 2.5 After startup SYS_RDY is high 2.0 V VIN Harvester input voltage 1.65 ISTBY Standby-current VREF Internally generated supply 1.8 V TSTART SYS_RDY high after applying VBAT 50 ms ENABLE = HIGH tbd 625 V tbd nA Power Converter AV Boost Factor Unloaded power converter PIN_MIN Minimum input power PWRS=R2=R1=R0=LOW, efficiency= 75% PIN_MAX Maximum input power PWRS=R2=R1=HIGH, R0=LOW, efficiency= 80% PMIN_DET Low-power detection level PWRS=R2=R1=R0=LOW TMPPT MPPT Interval tMPPT_OPT Time for MPPT optimization fCONV_MIN Minimum powerconverter frequency fCONV_MAX Maximum powerconverter frequency 2 or 2.3 15 μW 1000 μW 10 μW Low Power 1 High Power 0.7 s 10 ms PWRS=R2=R1=R0=LOW, Pin= 15μW 42 kHz PWRS=R2=R1=HIGH, R0=LOW, Pin= 1000μW 2 MHz Control VIL Logic low level for R2,R1,R0,PWRS VIH Logic high level for R2,R1,R0,PWRS VIL_ENABLE Logic low level for ENABLE VIH_ENABLE Logic high level for ENABLE © 2021 Nowi B.V. 0.2 * VREF 0.8 * VREF V 0.1 * VBAT 0.9 * VBAT V V V 5 Preliminary Datasheet | NH2D0245 - Energy Harvesting PMIC Revision 1.0 - December, 2021 12. Typical Performance Curves VBAT = 3V, VOC = 3V, TA = 25°C, unless otherwise specified Figure 4: Stand-by Current vs. VBAT over Temperature Figure 5: Start-up sequence, ENABLE= LOW Figure 6: Efficiency vs. Available Power Two power modes Figure 7: Efficiency vs. Input Current Two power modes Figure 8: Efficiency vs. Available Power Low Power Mode over Temperature Figure 9: Efficiency vs. Input Current Low Power Mode over Temperature © 2021 Nowi B.V. 6 Preliminary Datasheet | NH2D0245 - Energy Harvesting PMIC Revision 1.0 - December, 2021 12. Typical Performance Curves Continued VBAT = 3V, VOC = 3V, TA = 25°C, unless otherwise specified Figure 10: Efficiency vs. Available Power High Power Mode over Temperature Figure 11: Efficiency vs. Input Current High Power Mode over Temperature Figure 12: Efficiency vs. Available Power High Power Mode over VBAT Figure 13: Efficiency vs. Input Current High Power Mode over VBAT Figure 14: Efficiency vs. Available Power High Power Mode over VOC Figure 15: Efficiency vs. Input Current High Power Mode over VOC © 2021 Nowi B.V. 7 Preliminary Datasheet | NH2D0245 - Energy Harvesting PMIC Revision 1.0 - December, 2021 13. Application Information 13.1. Typical Application Figure 16: Typical PV-Cell Application Table 7: Bill of Materials REF DES DESCRIPTION TYPE VALUE QUANTITY U1 NH2 PMIC NH2D0245 C1, C2 Capacitor X5R / 6.3V 2.2 uF 2 C3 Capacitor X7R / 6.3V 5.6 nF 1 1 13.2. Efficiency Calculation Efficiency numbers shown in this datasheet are calculated based on available power, rather than (only) input power. Available power is the power presented at the input of the harvested IC when PV-cell and harvester are optimally matched. Non-optimal matching results in a reduced overall efficiency. Efficiency(%) = POUT PAVAILABLE ∗ 100 This equation implies that the matching of PV-cell and NH2D0245 is included in the efficiency number. © 2021 Nowi B.V. 8 Preliminary Datasheet | NH2D0245 - Energy Harvesting PMIC Revision 1.0 - December, 2021 Figure 17 depicts a PV-cell connected to the NH2D0245, where the PV-cell is represented by voltage source (VOC ) and a series resistor RSOURCE . Figure 17: PV-cell representation Optimal harvesting is achieved when the input impedance (RIN ) of the harvester IC is equal to the source impedance (RSOURCE ) of the PV-cell. In that case, the NH2D0245 input voltage (VDC_IN ) is 1/2 of the open circuit voltage (VOC ). The available power can be calculated accordingly: PAVAILABLE = (0.5 ∗ VOC ) RSOURCE 2 13.3. Selecting PV-cell For best efficiency, the operating voltage of the PV-cell (VOPE ) needs to align with the input voltage of the NH2D0245 (VDC_IN ). The input voltage of the NH2D0245 relates to the battery voltage (VBAT ) via the loaded boost factor. For the NH2D0245, the loaded boost factor is about 1.8x. So: VDC_IN = VBAT 1.8 The PV-cell’s optimal operating voltage depends on its characteristics and the level of light exposure. Typically, this is about VOPE = 0.7 ∗ VOC It is not needed to do this very precise. As a result of the true MPPT feature of the NH2D0245, VDC_IN will tune automatically to the optimal value within the supported power range. © 2021 Nowi B.V. 9 Preliminary Datasheet | NH2D0245 - Energy Harvesting PMIC Revision 1.0 - December, 2021 14. Packaging information Figure 18: Top view Figure 19: Bottom view Figure 20: Side view Table 8: Dimensions in millimeters (mm) SYMBOL MIN. NOM. MAX. A 0.70 0.75 0.80 A1 0.00 0.02 0.05 A3 0.203 b 0.18 0.24 0.30 D 2.90 3.00 3.10 E 2.90 3.00 3.10 D2 1.65 1.70 1.75 E2 1.65 1.70 1.75 e L © 2021 Nowi B.V. 0.50 0.30 0.35 0.40 10 Preliminary Datasheet | NH2D0245 - Energy Harvesting PMIC Revision 1.0 - December, 2021 15. Disclaimer Any information in this datasheet is preliminary and subject to changes without prior notice. Any information in this document is Nowi B.V. proprietary property and is protected by copyright and trademark laws and other intellectual property rights. The document can be used for individual non-commercial and informational purposes only. Any other use, including commercial use, is strictly prohibited. Nowi technology is available for licensing. A range of licensing models are possible and can be discussed upon request. As stipulated in Nowi’s distribution and/or supply agreements, the warranty linked to the NH2D0245 is depending on the qualification and certification procedure. During the test-phase Nowi is not able to give a warranty. After the test-phase for full qualification, Nowi will inform its co-contracting parties about the qualification and the warranty linked thereto. This warranty will have retroactive effect and therefore also applies to the NH2D0245 products which have been sold to the co-contracting parties during the test-phase. More product information (datasheets, silicon errata, application notes and reference designs) can be found on www.nowi-energy.com. © 2021 Nowi B.V. 11