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 3W 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 380mVand an input power of just 3W. - 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- - Warning when the battery is running low tingpredenedconditionsfortheenergystorageelement(over- - Warning when output voltage regulators are available charge oroverdischargevoltages), and by selectingthe voltage Optional primary battery: of the high-voltage supply and the low-voltage supply. More- - Automatic switching to the primary battery when the sec- over, special modes can be obtained at the expense of a few ondary battery is exhausted conguration resistors. Integrated balun for dual-cell supercapacitor The chip integrates all the active elements for powering a typ- ical wireless sensor. Five capacitors and two inductors are re- Applications quired, available in the small 0402 and 0603 size, respectively. With only seven external components, integration is maxi- PV cell harvesting Home automation mum, footprint and BOM are minimum, optimizing the time- to-market and the costs of WSN designs. Industrial monitoring E-health monitoring Geolocation Wireless sensor nodes Device information 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 R7 (optional) BUFSRC LBOOST FB PRIM D R9 SWBOOST (optional) CSRC Li-ion BATT battery BOOST AEM10941 BAL 2 CBOOST QFN28 5x5 mm STATUS 2 : 0 Micro- SWBUCK LVOUT controller LBUCK BUCK CLV ENHV Radio HVOUT CBUCK ENLV transceiver CHV DDDSSS AAAEEEMMM111000999444111 RRREEEVVV111...444 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 with Lboost = 10mH . 18 7.5 Shutdown mode 10 15 Boost eciency for Isrc at 100 A, 1 mA, 10 mA 7.6 Maximum power point tracking 10 and 100 mA with Lboost = 22mH . 19 7.7 Balun for dual-cell supercapacitor 10 16 Quiescent current with LDOs on and o 19 17 HVOUT at 3.3 V and 2.5 V . 20 8 System Conguration 11 18 LVOUT at 1.2 V and 1.8 V . 20 8.1 Battery and LDOs conguration 11 19 HVOUT eciency at 1.8 V, 2.5 V and 3.3 V 21 8.2 MPPT conguration 12 20 Eciency of BUCK cascaded with LVOUT at 1.2 V 8.3 Primary battery conguration . 12 and 1.8 V 21 8.4 Cold start conguration 12 21 Schematic example 22 8.5 No battery conguration 12 22 Layout example for the AEM10941 and its passive 8.6 Storage element information 12 components 23 23 QFN28 5mm x 5mm . 24 9 Typical Application Circuits 13 24 Board layout . 24 9.1 Example: Circuit 1 . 13 9.2 Example: Circuit 2 . 14 List of Tables 10 Performance Data 18 1 Pins description 4 10.1BOOST conversion eciency 10 uH . 18 2 Absolute maximum ratings 5 10.2BOOST conversion eciency with 22 uH . 19 3 Thermal data . 5 10.3Quiescent current . 19 4 Electrical characteristics . 6 10.4High-voltage LDO regulation . 20 5 Recommended operating conditions . 6 10.5Low-voltage LDO regulation 20 6 LDOs congurations . 9 10.6High-voltage LDO eciency 21 7 Usage of CFG 2:0 11 10.7Low-voltage LDO eciency 21 8 Usage of SELMPP 1:0 12 9 BOMexampleforAEM10941anditsrequiredpassive 11 Schematic 22 components 22 12 Layout 23 13 Package Information 24 13.1Plasticquadatpackno-lead(QFN285mmx5mm) . 24 13.2Board layout 24 DDDSSS AAAEEEMMM111000999444111 RRREEEVVV111...444 CCCooopppyyyrrriiiggghhhttt ccc 222000111888 eee---pppeeeaaasss SSSAAA 222