Ultra Efficient Dual Sources Energy Manager with Ratio/Constant Voltage Regulation, Regulated Buck Output and 5 V Charger, 120 mV, 135 mA The AEM13921 is a fully integrated and compact power management circuit that extracts DC power from two harvesting sources to store energy in a rechargeable storage element and supply an application circuit. A 5 V input can also be used to charge the storage element (e.g., if it gets depleted). This compact and ultra-efficient PMIC allows for extending battery lifetime and eliminating the primary energy storage in a large range of applications. Both sources implement Maximum Power Point Tracking (MPPT) based on open-circuit voltage ratio as well as constant source voltage regulation features, allowing for harvesting the maximum power available from each source to charge the storage element. With its unique cold-start circuit, it can start operating with an input voltage as low as 275 mV (min. 1.5 µW power). The configurable protection thresholds prevent overcharging and overdischarging the storage element. No external components are required to set those thresholds. The thermal monitoring prevents charging and discharging the storage element outside a configurable temperature range. The Average Power Monitoring (APM) allows the application circuit to get an estimate of the energy harvested from each source to the battery and from the battery to the application circuit. A shipping mode is available to avoid charging and discharging the storage element during shipping or storage. A buck regulator with selectable output voltage allows an application circuit to be supplied with high efficiency. I²C communication allows users to control every setting of the AEM13921 from the application circuit MCU. Features and Benefits Dual sources inputs - Boost operation optimized for each source. - Conversion efficiency above 90 % on each source. - Harvests from 120 mV after cold start. - Simultaneous harvesting from both sources. - Up to 135 mA current extracted from the harvester. Maximum Power Point Tracking - Both sources configurable to constant voltage mode or to open-circuit voltage ratio mode. - Optimal harvesting from a multiple combinations of harvesters (PV cells, RF, vibration, pulsed sources...). Cold start from 275 mV / 1.5 µW input - Startup at ultra-low power from each harvesting source input. Configurable overdischarge & overcharge protection - Supports various types of rechargeable storage elements (LiC, Li-ion, LiPo, Li-ceramic pouch...). Regulated output for application circuit - Buck regulator conversion efficiency up to 96 %. - Selectable output voltage between 0.6 V and 3.3 V. - Output current up to 100 mA. Thermal monitoring - Storage element protection against overtemperature and under-temperature during charging and discharging, independently. Average Power Monitoring - Provides data to determine how much energy has been transferred to the storage from each source and from the 5 V charger, as well as the energy drained from the storage to supply the application circuit. System configuration by GPIO or I²C communication - All settings dynamically configurable through GPIO or I²C (Fast Mode Plus). - System data available through I²C. Shipping mode - Storage element charge and discharge disabling during shipment. External 5 V charging capability - Extra charging input for 5 V power supplies. - Configurable CC and CV modes (max. 135 mA). - Provides a fast charging alternative when no source is available for a long time. #AEM13921 #EnergyHarvesting #PowerManagementIC #PMIC #MPPT #BatteryCharging #EnergyAutonomous #IoT #WirelessSensor #IndustrialMonitoring #EmbeddedSystems #QFN #epeas #LowPowerDesign

The CC1101RGP is a low-power sub-gigahertz RF transceiver designed for wireless communication applications requiring reliable long-range data transmission and high receiver sensitivity. It integrates a complete radio frequency front-end, packet handling engine, modulation and demodulation circuitry, frequency synthesizer, and advanced power management features within a compact package. The device supports multiple modulation formats and is optimized for industrial, scientific, medical, smart metering, home automation, remote control, wireless sensor networks, and Internet of Things applications. Its flexible configuration options enable designers to achieve an optimal balance between communication range, data throughput, power consumption, and system robustness. Features Sub-gigahertz RF transceiver for license-free ISM frequency bands High receiver sensitivity for extended communication range Programmable output power for optimized power consumption Multiple modulation schemes including FSK, GFSK, ASK, OOK, and MSK Integrated packet handling and error detection functions Fast frequency synthesizer settling time Low current consumption in transmit, receive, and sleep modes Hardware support for address filtering and data buffering Programmable channel spacing and data rate configuration Integrated RSSI, LQI, and clear channel assessment functions SPI interface for configuration and data communication Suitable for battery-powered wireless devices Applications Smart metering systems Wireless sensor networks Industrial monitoring and control Home and building automation Remote keyless entry systems Alarm and security systems Asset tracking devices Telemetry and data acquisition systems IoT communication nodes Proprietary wireless communication networks Electrical Characteristics Wide operating supply voltage range Low-power transmit and receive operation Programmable RF output power levels High-performance frequency synthesizer Low standby and sleep current consumption Integrated crystal oscillator support Robust RF performance across supported frequency bands Interface and Connectivity Serial Peripheral Interface communication Digital control and status signals Configurable interrupt outputs Integrated FIFO buffers for transmit and receive data External antenna connection through matching network Package Information Surface-mount package suitable for automated assembly Compact footprint for space-constrained applications RoHS-compliant device construction #commonpartslibrary #integratedcircuit #wirelesscommunication #rftransceiver #subghz #iot #embeddedsystems #industrialautomation #smartmetering #wirelesssensornetwork #lowpowerdesign #telemetry #homeautomation #remotecontrol #texasinstruments