Datasheet AEM00940 (E-peas) - 6

DATASHEET AEM00940
Y DIS RD CH C VL_U OOST OV L OV _ _ FSR C C_ T_CH SWB BU SR SET SR SE SET 28 27 26 25 24 23 22 BOOST 1 21 STATUS[0] SWBUCK 2 20 STATUS[1] BUCK 3 19 SRC_LVL_D CFG[2] 4 18 QFN28 ENLV CFG[1] 5 Top vie Top w vie 17 PRIM CFG[0] 6 16 BATT SRC_LVL_RANGE[1] 7 15 BAL 8 9 10 11 12 13 14 T T [0] _D _U HV E _HV G EN N LVOU FB HVOU _PRIM _PRIM L_RA FB FB LV _ SRC Figure 2: Pinout diagram QFN 28-pin NAME PIN NUMBER FUNCTION Power pins BOOST 1 Output of the boost converter. SWBUCK 2 Switching node of the buck converter. BUCK 3 Output of the buck converter. LVOUT 11 Output of the low voltage LDO regulator . HVOUT 14 Output of the high voltage LDO regulator. BAL 15 Connection to mid-point of a dual-cel supercapapcitor (optional). Must be connected to GND if not used. BATT 16 Connection to the energy storage element, battery or capacitor. Cannot be left floating. PRIM 17 Connection to the primary battery (optional). Must be connected to GND if not used. SRC 26 Connection to the harvested energy source. BUFSRC 27 Connection to an external capacitor buffering the boost converter input. SWBOOST 28 Switching node of the boost converter. Configuration pins CFG[2] 4 Used for the configuration of the threshold voltages for the energy storage element CFG[1] 5 and the output voltage of the LDOs. CFG[0] 6 SRC_LVL_RANGE[1] 7 Used for the configuration of the range for the source voltage regulation. SRC_LVL_RANGE[0] 8 Cannot be left floating. FB_PRIM_D 9 Used for the configuration of the primary battery (optional). FB_PRIM_U 10 Must be connected to GND if not used. FB_HV 13 Used for the configuration of the high-voltage LDO in the custom mode (optional). Must be left floating if not used. SRC_LVL_D 19 Used for the configuration of the source voltage regulation. SRC_LVL_U 24 Cannot be left floating. SET_OVCH 22 Used for the configuration of the threshold voltages for the energy storage element in SET_CHRDY 23 the custom mode (optional). Must be left floating if not used. SET_OVDIS 25 Table 1: Pins description (Part 1) DS_AEM00940_Rev1.0 Copyright © 2022 e-peas SA 6 Document Outline 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. Deep sleep & Wake up modes 7.1.1. Supercapacitor as a storage element. 7.1.2. Battery as a storage element. 7.2. Normal mode 7.2.1. Boost 7.2.2. Buck 7.2.3. LDO outputs 7.3. Overcharge mode 7.4. Primary mode 7.5. Shutdown mode 7.6. Balun for dual-cell supercapacitor 8. System configuration 8.1. Battery and LDOs configuration 8.1.1. Custom mode 8.2. Source voltage configuration 8.3. Primary battery configuration 8.4. No-battery configuration 8.5. Storage element information 8.6. External inductors information 8.7. External capacitors information 9. Typical Application Circuits 9.1. Example circuit 1 9.2. Example circuit 2 10. Performance Data 10.1. BOOST conversion efficiency for LBOOST = 10 µH 10.2. BOOST conversion efficiency for LBOOST = 22 µH 10.3. Quiescent current 10.4. High-voltage LDO regulation 10.5. Low-voltage LDO regulation 10.6. High-voltage LDO efficiency 10.7. Low-voltage LDO efficiency 11. Schematic 12. Layout Package Information 13.1. Plastic Quad Flatpack No-lead (QFN 28-pin 5x5mm) 13.2. Board Layout 14. Revision History