A DC solar storage system stores energy directly from panels, reducing conversion losses. A charge controller manages flow, ensuring efficiency.
"longDescription": "Detailed Description of Each Block", "blocks": [ { "name": "Solar Panel Strings", "function": "Primary energy source converting sunlight into DC electricity.", "theory_of_operation": "Photovoltaic cells generate DC voltage proportional to solar irradiance.", "interaction": "Feeds MPPT module in Solar Inverter for optimized power extraction.", "category": "Third party", "connection": ["MPPT"] }, { "name": "MPPT", "function": "Optimizes power output from solar panels.", "theory_of_operation": "Adjusts operating voltage/current using perturb-and-observe algorithm.", "interaction": "Connects Solar Panel String to DC link.", "category": "onsemi", "connection": ["DC/AC", "DC/DC & Flyback - AUX", "DC/DC Bidirectional Converter"] }, { "name": "DC/AC", "function": "Converts DC power from panels to AC for grid or load usage.", "theory_of_operation": "Uses PWM-controlled switches to generate AC waveform.", "interaction": "Connects MPPT output to AC grid.", "category": "onsemi", "connection": ["3-Phase Output"] }, { "name": "Battery Pack", "function": "Stores excess energy and provides backup power.", "theory_of_operation": "Lithium-ion battery pack connected via bidirectional converter for charging/discharging.", "interaction": "Interfaces with DC link and AC output through bidirectional converter.", "category": "Third party", "connection": ["DC/DC Bidirectional Converter", "Sensing & Isolation"] }, { "name": "DC/DC Bidirectional Converter", "function": "Handles conversion between DC and DC in both directions for battery charging/discharging.", "theory_of_operation": "Uses six-switch bridge topology for bidirectional power flow.", "interaction": "Connects Battery Pack to inverter.", "category": "onsemi", "connection": ["Battery Pack", "DC/DC & Flyback - AUX", "Sensing & Isolation", "DC/AC"] }, { "name": "Gate Driver", "function": "Provides gate control signals for power switches in inverter and converter stages.", "theory_of_operation": "Amplifies MCU logic signals to high-current gate pulses for MOSFETs/IGBTs.", "interaction": "Interfaces between MCU and power stage switches.", "category": "onsemi", "connection": ["DC/DC Bidirectional Converter"] }, { "name": "Sensing & Isolation", "function": "Provides electrical isolation and sensing for safe signal transmission.", "theory_of_operation": "Uses optocouplers or transformers for isolation and sensors for current/voltage feedback.", "interaction": "Connects Gate Driver to MCU for feedback and control.", "category": "onsemi", "connection": [ "MCU"] }, { "name": "DC/DC & Flyback - AUX", "function": "Provides auxiliary low-voltage DC power from an AC mains input for control and sensing circuits.", "theory_of_operation": "Uses a flyback converter topology to step down AC mains voltage to isolated DC output. The flyback transformer stores energy during the MOSFET on-time and transfers it to the secondary during off-time, enabling galvanic isolation and multiple output rails.", "interaction": "Interfaces with the Auxiliary Power Supply section to feed LV rails for MCU, gate drivers, and sensing modules. Also provides isolated power for communication and control circuits.", "category": "onsemi", "connection": ["Auxiliary Power Supply"] }, { "name": "Auxiliary Power Supply", "function": "Generates low-voltage rails for control electronics.", "theory_of_operation": "Includes converters, LDOs, PMIC, and protection circuits.", "interaction": "Feeds MCU and support circuitry.", "connection": ["MCU Interface", "MCU", "Sensing & Isolation", "Gate Driver"], "sub_blocks": [ { "name": "Controller", "function": "Manages power sequencing and regulation.", "theory_of_operation": "Implements control logic for converters and switches.", "interaction": "Interfaces with PMIC and MCU.", "category": "onsemi", "connection": [] }, { "name": "Converter", "function": "Converts input voltage to required levels.", "theory_of_operation": "Switching regulators for high efficiency.", "interaction": "Provide intermediate rails to LDOs.", "category": "onsemi", "connection": [] }, { "name": "MOSFET", "function": "Acts as switching element in converters and load switches.", "theory_of_operation": "Controlled by gate drivers for efficient switching.", "interaction": "Connects converters to loads.", "category": "onsemi", "connection": [] }, { "name": "Diode", "function": "Provides reverse polarity protection and rectification.", "theory_of_operation": "Allows current flow in one direction only.", "interaction": "Placed in converter circuits for protection.", "category": "onsemi", "connection": [] }, { "name": "LDO", "function": "Provides clean low-noise voltage for sensitive circuits.", "theory_of_operation": "Linear regulation for minimal ripple.", "interaction": "Feeds MCU and analog blocks.", "category": "onsemi", "connection": [] }, { "name": "PMIC", "function": "Manages multiple voltage rails for system power.", "theory_of_operation": "Integrates converters and regulators in one IC.", "interaction": "Distributes power to LV circuits.", "category": "onsemi", "connection": [] }, { "name": "Load Switch", "function": "Controls power delivery to subsystems.", "theory_of_operation": "MOSFET-based switch with enable control.", "interaction": "Connects LV rails to loads.", "category": "onsemi", "connection": [] }, { "name": "Circuit Protection", "function": "Protects LV circuits from overcurrent and short circuits.", "theory_of_operation": "Uses fuses or electronic protection ICs.", "interaction": "Placed on LV rails before loads.", "category": "onsemi", "connection": [] } ] }, { "name": "MCU Interface", "function": "Central control and communication hub.", "theory_of_operation": "Microcontroller executes inverter control algorithms and manages communication.", "interaction": "Connects to LV power, support circuits, memory, and networking.", "connection": ["MCU"], "sub_blocks": [ { "name": "Memory", "function": "Stores firmware and operational data.", "theory_of_operation": "Non-volatile storage for system code and logs.", "interaction": "Interfaces with MCU via SPI or parallel bus.", "category": "onsemi", "connection": [] }, { "name": "FlexRay", "function": "Provides deterministic high-speed communication.", "theory_of_operation": "Time-triggered protocol for automotive networks.", "interaction": "Connects MCU to vehicle backbone.", "category": "onsemi", "connection": [] }, { "name": "Ethernet Controller", "function": "Enable high-speed networking.", "theory_of_operation": "Implements Ethernet standards.", "interaction": "Connects MCU to external network.", "category": "onsemi", "connection": [] }, { "name": "CAN", "function": "Provides robust in-vehicle communication.", "theory_of_operation": "Differential signaling for fault-tolerant data exchange.", "interaction": "Connects MCU to CAN bus.", "category": "onsemi", "connection": [] }, { "name": "LIN", "function": "Low-speed communication for simple devices.", "theory_of_operation": "Single-wire protocol for cost-effective networking.", "interaction": "Connects MCU to LIN nodes.", "category": "onsemi", "connection": [] }, { "name": "Amplifier & Comparator", "function": "Signal conditioning and threshold detection.", "theory_of_operation": "Amplifies analog signals and compares voltage levels.", "interaction": "Interfaces with sensors and MCU ADC.", "category": "onsemi", "connection": [] }, { "name": "ESD Protection", "function": "Protects MCU interface lines from electrostatic discharge.", "theory_of_operation": "Uses TVS diodes to clamp voltage spikes.", "interaction": "Placed on communication and control lines.", "category": "onsemi", "connection": [] } ] }, { "name": "Support Circuitry", "function": "Ensures signal integrity and protection for control and communication.", "theory_of_operation": "Includes ESD protection, level translators, voltage references, and supervisory circuits.", "interaction": "Interfaces between MCU and peripheral circuits.", "connection": ["MCU Interface"], "sub_blocks": [ { "name": "Zener Diode", "function": "Provides voltage clamping for protection.", "theory_of_operation": "Breakdown at specific voltage to absorb surges.", "interaction": "Placed across sensitive signal lines.", "category": "onsemi", "connection": [] }, { "name": "Level Translator", "function": "Converts logic levels between different voltage domains.", "theory_of_operation": "Bidirectional or unidirectional translation using MOSFET-based circuits.", "interaction": "Connects MCU to peripheral ICs.", "category": "onsemi", "connection": [] }, { "name": "Voltage Reference", "function": "Provides stable reference voltage for ADC and comparators.", "theory_of_operation": "Precision bandgap reference circuit.", "interaction": "Feeds MCU and analog blocks.", "category": "onsemi", "connection": [] }, { "name": "Voltage Supervisor", "function": "Monitors supply voltage and resets MCU on fault.", "theory_of_operation": "Compares supply voltage to threshold and asserts reset.", "interaction": "Connects to MCU reset pin.", "category": "onsemi", "connection": [] }, { "name": "ESD Protection", "function": "Protects signal lines from electrostatic discharge.", "theory_of_operation": "Uses TVS diodes to clamp voltage spikes.", "interaction": "Placed on communication and control lines.", "category": "onsemi", "connection": [] } ] } ], "interconnections": [ {"source": "Solar Panel Strings", "target": "MPPT"}, {"source": "MPPT", "target": "3-Phase Output"}, {"source": "MPPT", "target": "DC/DC Bidirectional Converter"}, {"source": "MPPT", "target": "DC/DC & Flyback - AUX"}, {"source": "DC/DC & Flyback - AUX", "target": "Auxiliary Power Supply"}, {"source": "Auxiliary Power Supply", "target": "MCU Interface"}, {"source": "Auxiliary Power Supply", "target": "MCU"}, {"source": "Auxiliary Power Supply", "target": "Sensing & Isolation"}, {"source": "Auxiliary Power Supply", "target": "Gate Driver"}, {"source": "Battery Pack", "target": "DC/DC Bidirectional Converter"}, {"source": "Bidirectional DC/AC Converter", "target": "DC/AC"}, {"source": "Bidirectional DC/AC Converter", "target": "DC/DC & Flyback - AUX"}, {"source": "Bidirectional DC/AC Converter", "target": "Sensing & Isolation"}, {"source": "Gate Driver", "target": "DC/DC Bidirectional Converter"}, {"source": "MCU Interface", "target": "MCU"}, {"source": "MCU", "target": "MCU Interface"}, {"source": "MCU", "target": "Gate Driver"} {"source": "Sensing & Isolation", "target": "MCU"} ], "Last_update": "2025-12-19",
Power Integrated Module, Dual Boost, 1200 V, 50 A IGBT + 1200 V, 20 A SiC Diode.
パワー・インテグレーテッド・モジュール (PIM)、3 チャネル 1200 V IGBT + SiC ブースト、80 A IGBT および 20 A SiC ダイオード
Si/SiC Hybrid Power Integrated Module (PIM), 3-channel Boost
Si/SiC Hybrid Modules, 3 Channel Symmetric Boost 1000 V, 150 A IGBT, 1200 V, 30 A SiC Diode
Si/SiC Hybrid Modules, 3 Channel Symmetric Boost 1000 V, 200 A IGBT, 1200 V, 60 A SiC Diode
Si/SiC Hybrid Module, 2 Channel Flying Capacitor Boost 1000 V, 500 A IGBT, 1200 V, 120 A SiC Diode
Si/SiC Hybrid Module, 2 Channel Flying Capacitor Boost 1000 V, 500 A IGBT, 1200 V, 120 A SiC Diode
Si/SiC Hybrid Module, 2 Channel Flying Capacitor Boost 1000 V, 500 A IGBT, 1200 V, 120 A SiC Diode
Si/SiC Hybrid Modules, 3 Channel Flying Capacitor Boost 1000 V, 200 A IGBT, 1200 V, 60 A SiC Diode
Silicon Carbide (SiC) MOSFET - EliteSiC, 40 mohm, 1200 V, M3S, TO-247-3L
Silicon Carbide (SiC) MOSFET - EliteSiC, 65 mohm, 1200 V, M3S, D2PAK-7L
SiC ダイオード - 650V、16A、TO-220-2
Silicon Carbide (SiC) Schottky Diode – EliteSiC, 50 A, 1200 V, D3, TO-247-2L
Silicon Carbide (SiC) Schottky Diode – EliteSiC, 30 A, 1200 V, D3, TO-247-2L
SiC ダイオード、650V、50A、TO-247-2
Silicon Carbide (SiC) Schottky Diode – EliteSiC, 30 A, 650 V, D1, TO-220-2L
Full SiC MOSFET Module | EliteSiC Two Channel Full SiC Boost, 1200 V, 40 mohm SiC MOSFET + 1200 V, 40 A SiC Diode
Full SiC MOSFET Module | EliteSiC Two Channel Full SiC Boost, 1200 V, 80 mohm SiC MOSFET + 1200 V, 20 A SiC Diode
Full SiC MOSFET Module | EliteSiC Three Channel Full SiC Boost, 1200 V, 40 mohm SiC MOSFET + 1200 V, 40 A SiC Diode
Evaluation Board for Double Pulse Testing discrete solutions
Discrete Double Pulse Tester – Extension Daughter Cards Set
1. What are the main benefits of a DC‑coupled ESS architecture?
DC‑coupled ESS architectures improve efficiency and flexibility. By minimizing AC/DC conversion stages, they reduce losses, enable easier integration of renewables, support bidirectional power flow, and allow scalable designs across residential, commercial, and industrial power levels.
2. Where are DC coupled energy storage systems typically used?
DC coupled ESS solutions are used in residential, commercial, and industrial applications. They are commonly deployed in home battery systems, commercial energy storage, grid‑connected inverters, and industrial power conversion systems ranging from a few kilowatts to several hundred kilowatts.
3. How does the battery interface work in a DC‑coupled ESS?
The battery is connected through a bidirectional DC/DC converter. This converter manages charging and discharging, adapts battery voltage to the DC link, and supports power flow in both directions while maintaining efficiency, protection, and control across wide voltage ranges.
4. What bidirectional DC/DC converter options are used in DC‑coupled ESS designs?
Common options include Dual Active Bridge, CLLC resonant, and buck‑boost converters. Each topology offers different trade‑offs in isolation, efficiency, cost, and power density, allowing designers to optimize for residential, commercial, or high‑power industrial energy storage systems.
5. How does the onsemi Interactive Block Diagram help me select parts and build a worksheet/BOM?
The onsemi interactive block diagram lets you select a taxonomy, choose devices per block, and download a worksheet. If you need a deeper dive into the tool, watch our tutorial video.
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