DDDAAATTTAAASSSHHHEEEEEETTT AAAEEEMMM111000999444111 Highly-ecient, regulated dual-output, ambient energy manager for up to 7-cell solar panels with optional primary battery Features Description Ultra-low-power start-up: The AEM10941 is an integrated energy management circuit - Cold start from 380mV input voltage and 3 W input that extracts DC power from up to 7-cell solar panels to si- power (typical) multaneously store energy in a rechargeable element and sup- ply the system with two independent regulated voltages. The Ultra-low-power boost regulator: AEM10941 allows to extend battery lifetime and ultimately - Open-circuit voltage sensing for MPPT every 5 s eliminates the primary energy storage element in a large range - Congurable MPPT with 2-pin programming ofwirelessapplications,suchasindustrialmonitoring,geoloca- - Selectable Voc ratios of 70, 75, 85 or 90 % tion, home automation, e-health monitoring and wireless sen- - Input voltage operation range from 50 mV to 5 V sor nodes. - MPPT voltage operation range from 50 mV to 5 V The AEM10941 harvests the available input current up to Integrated 1.2/1.8 V LDO regulator: 110 mA. It integrates an ultra-low power boost converter to - Up to 20 mA load current charge a storage element, such as a Li-ion battery, a thin lm - Power gated dynamically by external control battery, a supercapacitor or a conventional capacitor. The - Selectable output voltage boost converter operates with input voltages in a range from Integrated 1.8 V-4.1 V LDO regulator: 50 mV to 5 V. With its unique cold-start circuit, it can start - Up to 80 mA load current with 300 mV drop-out operating with empty storage elements at an input voltage as - Power gated dynamically by external control low as 380mV and an input power of just 3 W. - Selectable or adjustable output voltage The low-voltage supply typically drives a microcontroller at 1.2 V or 1.8 V. The high-voltage supply typically drives a ra- Flexible energy storage management: dio transceiver at a congurable voltage between 1.8 V and - Selectableoverchargeandoverdischargeprotectionforany 4.1 V. Both are driven by highly-ecient LDO (Low Drop- type of rechargeable battery or (super)capacitor Out) regulators for low noise and high stability. - Fast supercapacitor charging Conguration pins determine various operating modes by set- - Warns the load when battery is running low tingpredenedconditionsfortheenergystorageelement(over- - Warns when output voltage regulators are available chargeoroverdischargevoltages), andby selectingthe voltage Smallest footprint, smallest BOM: of the high-voltage supply and the low-voltage supply. More- - Only seven passive external components over, special modes can be obtained at the expense of a few Optional primary battery: conguration resistors. - Automatically switches to the primary battery when the The chip integrates all the active elements for powering a typ- secondary battery is exhausted ical wireless sensor. Five capacitors and two inductors are re- quired, available in the small 0402 and 0603 size, respectively. Integrated balun for dual-cell supercapacitor With only seven external components, integration is maxi- mum, footprint and BOM are minimum, optimizing the time- Applications to-market and the costs of WSN designs. PV cell harvesting Home automation Device information Industrial monitoring E-health monitoring Geolocation Wireless sensor nodes Part number Package Body size 10AEM10941C0000 QFN 28-pin 5mm x 5mm R4-R3-R2-R1 (optional) R6-R5 (optional) BOOST HVOUT Primary battery BUCK (optional) PV cell SRC PRIM R10 (optional) R8 (optional) FB COLD FB PRIM U BUFSRC R7 (optional) LBOOST FB PRIM D R9 SWBOOST (optional) CSRC Li-ion BATT battery BOOST AEM10941 BAL CBOOST 2 QFN28 5x5 mm STATUS 2 : 0 Micro- SWBUCK LVOUT controller LBUCK BUCK CLV ENHV Radio HVOUT ENLV CBUCK transceiver CHV DDDSSS AAAEEEMMM111000999444111 RRREEEVVV111...333 CCCooopppyyyrrriiiggghhhttt ccc 222000111888 eee---pppeeeaaasss SSSAAA 111 CFG 2 : 0 SET OVCH SELMPP 1 : 0 SET CHRDY SET OVDIS GND FB HVDDDAAATTTAAASSSHHHEEEEEETTT AAAEEEMMM111000999444111 Contents List of Figures 1 Introduction 3 1 Simplied schematic view 3 2 Pinout diagram QFN28 . 4 2 Absolute Maximum Ratings 5 3 Functional block diagram 7 4 Simplied schematic view of the AEM10941 8 3 Thermal Resistance 5 5 Diagram of the AEM10941 modes 8 6 Custom conguration resistors 11 4 Typical Electrical Characteristics at 25 C 5 7 Typical application circuit 1 . 13 8 Typical application circuit 2 . 14 5 Recommended Operation Conditions 6 9 Cold start with a capacitor connected to BATT . 15 10 Cold start with a battery connected to BATT 15 6 Functional Block Diagram 7 11 Overvoltage mode 16 7 Theory of Operation 8 12 Shutdown mode (without primary battery) . 16 13 Switch to primary battery if the battery is overdis- 7.1 Deep sleep & Wake up modes . 8 charged 17 7.2 Normal mode 9 7.3 Overvoltage mode . 9 14 Boost eciency for Isrc at 100 A, 1 mA, 10 mA 7.4 Primary mode . 10 and 100 mA . 18 7.5 Shutdown mode 10 15 Quiescent current with LDOs on and o 18 7.6 Maximum power point tracking 10 16 HVOUT at 3.3 V and 2.5 V . 19 7.7 Balun for dual-cell supercapacitor 10 17 LVOUT at 1.2 V and 1.8 V . 19 18 HVOUT eciency at 1.8 V, 2.5 V and 3.3 V 20 8 System Conguration 11 19 Eciency of BUCK cascaded with LVOUT at 1.2 V 8.1 Battery and LDOs conguration 11 and 1.8 V 20 8.2 MPPT conguration 12 20 Schematic example 21 8.3 Primary battery conguration . 12 21 Layout example for the AEM10941 and its passive 8.4 Cold-start conguration 12 components 22 8.5 No-battery conguration 12 22 QFN28 5x5mm 23 8.6 Storage element information 12 23 Board layout . 23 9 Typical Application Circuits 13 List of Tables 9.1 Example circuit 1 13 9.2 Example circuit 2 14 1 Pins description 4 2 Absolute maximum ratings 5 10 Performance Data 18 3 Thermal data . 5 10.1BOOST conversion eciency . 18 4 Electrical characteristics . 5 10.2Quiescent current . 18 5 Recommended operating conditions . 6 10.3High-voltage LDO regulation . 19 6 LDOs congurations . 9 10.4Low-voltage LDO regulation 19 7 Usage of CFG 2:0 11 10.5High-voltage LDO eciency 20 8 Usage of SELMPP 1:0 12 10.6Low-voltage LDO eciency 20 9 BOMexampleforAEM10941anditsrequiredpassive components 21 11 Schematic 21 12 Layout 22 13 Package Information 23 13.1Plastic quad atpack no-lead (QFN28 5x5mm) . 23 13.2Board layout 23 DDDSSS AAAEEEMMM111000999444111 RRREEEVVV111...333 CCCooopppyyyrrriiiggghhhttt ccc 222000111888 eee---pppeeeaaasss SSSAAA 222