Datasheet AEM00300 (E-peas) - 5

DATASHEET AEM00300
AEM00300 Storage element • Li-ion cell Source SRC STO • LiFePO4 cell 140mV - 4.5V • Nimh cell MAX • Dual-cell supercapacitor • Single-cell supercapacitor • Other... Figure 1: Simplified Schematic View
1. Introduction
The AEM00300 is a ful -featured energy efficient power modes fit the user’s storage element, a custom mode is also management circuit able to harvest energy from an energy available to al ow the user to define a mode with custom source (connected to SRC) to charge a storage element specifications. (connected to STO). This is done with a minimal bil of Status pin ST_STO provides information about the voltage material: only 2 capacitors and one inductor are needed for a levels of the storage element. ST_STO is asserted when the basic setup. voltage of the storage element VSTO is above VCHRDY and is The heart of the AEM00300 is a regulated switching DCDC reset when the voltage drops below VOVDIS. converter with high power conversion efficiency. Depending on the harvester and the application, the source At first start-up, as soon as a required cold-start voltage of regulation voltage, VSRC,REG, can be configured thanks to six 275 mV and a sparse amount of power of at least 3 μW is configuration pins (SRC_LVL_CFG[5:0]). available at the source, the AEM00300 coldstarts. After the The AEM00300’s DCDC converter can work in two modes: cold start, the AEM extracts the power available from the LOW POWER MODE and HIGH POWER MODE, each one of source if the working input voltage is higher than VSRC,REG. these being optimized for a power range on SRC. Through four configuration pins (STO_CFG[3:0]), the user can The charging of the storage element can be prevented by select a specific operating mode out of 15 modes that cover pul ing EN_STO_CH to GND, typical y to protect the storage most application requirements without any dedicated element if the temperature is too low/high to safely charge it. external component. Those operating modes define the protection levels of the storage element. If none of those 15 DS_AEM00300_Rev1.0 Copyright © 2022 e-peas SA 6 Document Outline Table of Contents List of Tables 1. Introduction 2. Absolute Maximum Ratings 3. Thermal Resistance 4. Typical Electrical Characteristics at 25 °C 5. Recommended Operation Conditions 6. Functional Block Diagram 7. Theory of Operation 7.1. DCDC Converter 7.2. Reset and Wake Up States 7.3. Supply State 7.4. Source Voltage Regulation 7.5. Balancing for Dual-Cell Supercapacitor 8. System Configuration 8.1. High Power / Low Power Mode 8.2. Storage Element Configuration 8.3. Custom Mode Configuration 8.4. Disable Storage Element Charging 8.5. Source Level Configuration 8.6. External Components 8.6.1. Storage element information 8.6.2. External inductor information 8.6.3. External capacitors information CSRC CINT 9. Typical Application Circuits 9.1. Example Circuit 1 9.2. Example Circuit 2 9.3. Circuit Behaviour 9.4. DCDC Conversion Efficiency From SRC to STO in Low Power Mode 9.4. DCDC Conversion Efficiency From SRC to STO in Low Power Mode 9.5. DCDC Conversion Efficiency From SRC to STO in High Power Mode 10. Schematic 11. Layout 12. Package Information 12.1. Plastic Quad Flatpack No-Lead (QFN 28-pin 4x4mm) 12.2. Board Layout 13. Revision History