{
  "node": {
    "id": "term:pmbus",
    "type": "Term",
    "label": "PMBus",
    "properties": {
      "id": "pmbus",
      "name": "PMBus",
      "aka": [
        "Power Management Bus"
      ],
      "section": "topic-data",
      "definition": "An open protocol, built on SMBus, for configuring and monitoring power converters through a standard command set — setting output voltage, reading current and temperature, logging faults. A battery pack with its own regulated output or charger stage can expose it, so the host controls the pack like any other power supply.",
      "related": [
        "smbus",
        "i2c",
        "power-path-management",
        "charger"
      ],
      "url": "https://lemonergy.com/learn/glossary/pmbus/",
      "mentions": []
    }
  },
  "edges": [
    {
      "id": "edge:belongsTo/term:pmbus/topic:topic-data",
      "source": "term:pmbus",
      "target": "topic:topic-data",
      "type": "belongsTo",
      "properties": {
        "sourceFile": "terms.json"
      }
    },
    {
      "id": "edge:relatedTo/term:pmbus/term:smbus",
      "source": "term:pmbus",
      "target": "term:smbus",
      "type": "relatedTo",
      "properties": {
        "sourceFile": "terms.json",
        "meaning": "Related context; not a causal claim"
      }
    },
    {
      "id": "edge:relatedTo/term:pmbus/term:i2c",
      "source": "term:pmbus",
      "target": "term:i2c",
      "type": "relatedTo",
      "properties": {
        "sourceFile": "terms.json",
        "meaning": "Related context; not a causal claim"
      }
    },
    {
      "id": "edge:relatedTo/term:pmbus/term:power-path-management",
      "source": "term:pmbus",
      "target": "term:power-path-management",
      "type": "relatedTo",
      "properties": {
        "sourceFile": "terms.json",
        "meaning": "Related context; not a causal claim"
      }
    },
    {
      "id": "edge:relatedTo/term:pmbus/term:charger",
      "source": "term:pmbus",
      "target": "term:charger",
      "type": "relatedTo",
      "properties": {
        "sourceFile": "terms.json",
        "meaning": "Related context; not a causal claim"
      }
    }
  ],
  "neighbors": [
    {
      "id": "topic:topic-data",
      "type": "Topic",
      "label": "Data, communication and electronics",
      "properties": {
        "id": "topic-data",
        "name": "Data, communication and electronics",
        "lede": "The control units, chips, protocols and file formats through which a battery is measured, controlled and logged.",
        "context": "Separate quantities from encoding and transport.",
        "example": "2500 in a log might mean 25.00 °C, 2.5 V or raw counts. Units and scale must accompany the value.",
        "lesson_url": "https://lemonergy.com/learn/fundamentals/battery-basics/",
        "lesson_label": "Open battery basics"
      }
    },
    {
      "id": "term:smbus",
      "type": "Term",
      "label": "SMBus",
      "properties": {
        "id": "smbus",
        "name": "SMBus",
        "aka": [
          "System Management Bus"
        ],
        "section": "topic-pack",
        "definition": "The two-wire bus, derived from I²C, over which a laptop or tool battery reports its charge, health and limits to the host and charger. The Smart Battery Data specification defines the register set, so any compliant charger can read it.",
        "related": [
          "bms",
          "fuel-gauge",
          "consumer-electronics",
          "charger",
          "smart-battery-system",
          "i2c"
        ],
        "url": "https://lemonergy.com/learn/glossary/smbus/",
        "mentions": []
      }
    },
    {
      "id": "term:i2c",
      "type": "Term",
      "label": "I²C",
      "properties": {
        "id": "i2c",
        "name": "I²C",
        "aka": [
          "I2C",
          "IIC",
          "inter-integrated circuit",
          "TWI",
          "two-wire interface"
        ],
        "section": "topic-data",
        "definition": "A two-wire serial bus — one clock line and one data line, both pulled up — on which a controller addresses many small chips at 100 kbit/s, 400 kbit/s or faster. Inside a battery pack it links the fuel gauge, protection chip, memory and temperature sensors; SMBus is derived from it with tighter timing rules.",
        "related": [
          "smbus",
          "fuel-gauge",
          "afe",
          "mcu",
          "gpio",
          "pmbus"
        ],
        "url": "https://lemonergy.com/learn/glossary/i2c/",
        "mentions": []
      }
    },
    {
      "id": "term:power-path-management",
      "type": "Term",
      "label": "Power-path management",
      "properties": {
        "id": "power-path-management",
        "name": "Power-path management",
        "aka": [
          "power path",
          "ideal diode",
          "load sharing",
          "system output power",
          "instant-on"
        ],
        "section": "topic-pack",
        "definition": "Circuitry that routes power between an external supply, the battery and the system load, so the device runs from the supply while the battery charges, draws on the battery when the supply sags or fails, and adds battery current during peaks. An ideal-diode switch — a MOSFET driven to behave as a near-lossless diode — makes the changeover seamless.",
        "related": [
          "charger",
          "embedded-charger",
          "mosfet",
          "uninterruptible-power-supply"
        ],
        "url": "https://lemonergy.com/learn/glossary/power-path-management/",
        "mentions": []
      }
    },
    {
      "id": "term:charger",
      "type": "Term",
      "label": "Charger",
      "properties": {
        "id": "charger",
        "name": "Charger",
        "section": "topic-charging",
        "definition": "The power electronics that convert mains or DC supply into the controlled current and voltage a battery needs. For lithium-ion it runs the CC-CV profile within the limits the BMS communicates, and stops rather than floats when the cell is full.",
        "related": [
          "cc-cv-charging",
          "bms",
          "onboard-charger",
          "dc-fast-charging"
        ],
        "url": "https://lemonergy.com/learn/glossary/charger/",
        "mentions": []
      }
    }
  ]
}