مدونة الشركة حول Supply ADI Battery Management:Battery Chargers,Battery Monitors & Fuel Gauges,USB Charging

Supply ADI Battery Management:Battery Chargers,Battery Monitors & Fuel Gauges,USB Charging

Shenzhen Mingjiada Electronics Co., Ltd. specialises in the sale of electronic components. Through consistent quality, timely delivery and professional service, we provide our customers with an efficient, convenient and high-quality procurement experience.

Supply Advantages:

1. Guaranteed Genuine Products: All chips are sourced directly from manufacturers’ channels, and traceable documentation is provided to ensure there are no refurbished products or loose new items.

2. Ample and Stable Stock: We maintain substantial stock at all times, enabling us to support sample orders, small-batch prototyping and large-scale mass production, with short lead times.

3. Strict Quality Control: We ensure that all supplied components come from legitimate channels and are of reliable quality.

4. Competitive pricing: Through close collaboration with suppliers and efficient supply chain management, we are able to offer highly competitive prices.

ADI’s battery management solutions include the former LT+Maxim product lines, covering linear / switching charging, cell monitoring, state-of-charge (SOC) measurement, power paths, USB BC1.2 / Type-C PD, and OTG reverse power delivery. These solutions are compatible with single-cell lithium batteries, LiFePO₄, multi-cell battery packs, lead-acid and nickel-metal hydride batteries, and are designed for applications such as wearables, mobile phones, portable medical devices, industrial handheld devices, energy storage and automotive BMS.

I. Battery Chargers

These are categorised into linear chargers, switch-mode buck chargers, buck–boost / multi-chemistry chargers, wireless charging solutions and integrated PowerPath power management circuits. They support pre-charge, constant current (CC), constant voltage (CV), JEITA temperature-controlled charging, thermal regulation, input current limiting and battery protection.

Core Topologies and Features

1. Linear chargers: Simple structure, low BOM, low noise; Suitable for low-current applications, wearables, TWS and small IoT devices. Disadvantages include a large voltage drop and high heat generation.

- Representative examples: LTC4066 (classic USB linear charger, single-cell lithium battery, input current limiting 100/500 mA), MAX8934B (dual-input USB + adapter, JEITA temperature-controlled charging, automatic power source selection)

2. Switching Buck Chargers: High efficiency and high current; the mainstay for Type-C PD portable devices; support wide input voltage range; integrated PowerPath; input power is shared between the load and charging; seamless switch to battery power when the adapter is unplugged.

- Representative models: MAX77785/MAX77786/MAX77789, MAX77972/MAX77975; single-cell lithium-ion, up to 5.5 A; supports USB-C PD, PPS, DRP and OTG reverse boost output

3. Multi-chemistry high-voltage chargers (LTC series): LTC4162, 4.5–35V wide input range, supports lithium-ion, lithium iron phosphate and lead-acid batteries, featuring MPPT solar input, I²C telemetry and PowerPath; suitable for industrial applications, portable energy storage and solar-powered equipment

4. Wireless charging IC: LTC4126, wireless receiver + buck converter, wireless lithium-ion battery charging solution

5. Integrated 3-in-1 (charger + fuel gauge + protection): MAX17330 / MAX17335, AccuCharge charging technology, standalone pack-side solution requiring no continuous host intervention, with built-in self-discharge detection, suitable for battery pack-side applications

General Key Features

- Charging process: Pre-charge → Constant Current (CC) → Constant Voltage (CV) → Charge termination; rechargeable

- NTC temperature monitoring, JEITA temperature-controlled charging, current reduction or charge termination at high temperatures

- Input OVP, battery overcharge, over-discharge and thermal shutdown of the charging circuit

- PowerPath: Power arbitration between VIN, battery and load; peak load can be supplemented by the battery; no power loss when the adapter is disconnected; instant start-up

- Interfaces: I2C/SMBus; capable of reporting charging status, voltage and current, and fault flags

II. Battery Monitor & Fuel Gauge

Two distinct roles: the Battery Monitor focuses on cell voltage, temperature, balancing and safety protection; the Fuel Gauge focuses on remaining State of Charge (SOC), capacity, State of Health (SOH) and remaining time prediction**. ADI offers two main technical approaches: traditional coulomb counters + ModelGauge™ algorithms (mainstream)

1. Battery Monitor (including high-voltage monitoring for multi-cell BMS)

- Low-voltage single-cell monitoring: LTC2941/LTC2942, coulomb counting, measures voltage, current and temperature, I²C/SMBus, suitable for single-cell handheld devices

- High-voltage multi-cell BMS (LTC68xx / ADBMS68xx): Core components for automotive and energy storage BMS; synchronous multi-channel cell voltage acquisition; isoSPI isolated communication; supports cell balancing; compliant with ISO 26262 functional safety; the LTC2949 is used in conjunction to measure total current, total power and charge, with synchronous sampling to the LTC68xx

- Functions: Cell overvoltage / undervoltage, overtemperature, short circuit, inter-cell balancing, fault alerts

2. Fuel Gauge (ModelGauge m5 is ADI’s flagship product)

ModelGauge m5 / m5 EZ combines the short-term high precision of a coulomb counter with the long-term stability of an open-circuit voltage (OCV) model, addressing the shortcomings of pure coulomb counters (drift) and pure voltage meters (inaccuracy under dynamic loads). It automatically compensates for battery ageing, temperature and discharge rates, and outputs SOC (%), remaining capacity (mAh), remaining discharge time, estimated time to full charge, State of Health (SOH), and cycle life prediction

- Stand-alone fuel gauge: MAX17211; ModelGauge m5 with SHA-256 encryption and authentication for battery pack anti-counterfeiting, suitable for devices with replaceable batteries; the EZ version requires no battery characteristic parameter profiling and is ready for use immediately upon power-up, lowering the development barrier

- 2–4-cell series pack-side fuel gauge: MAX17320, 2S–4S lithium batteries, fuel gauge + protection + cell balancing + SHA-256 authentication, integrated pack-end solution, controls external high-side and low-side FETs to provide comprehensive charge and discharge protection

- Primary cell fuel gauge: LTC3337, 100 nA ultra-low quiescent current, primary cell SOH monitoring; suitable for single-use battery sensors and IoT nodes

Key distinctions:

- Monitor: Monitors the voltage of each cell in a string, performs balancing and safety protection; essential for multi-string battery packs

- Fuel gauge: Calculates remaining charge and runtime, providing SOC data for system UI and power management strategies

III. USB Charging

The ADI USB charging product line combines a charger with USB protocol detection, PowerPath and OTG functionality. It is compatible with traditional USB BC1.2, Type-C 1.3, USB-PD 3.0 and PPS, and supports Sink (charging as a power sink), Source/DRP (bidirectional role switching, OTG external discharge)

Core Capabilities

1. Input Source Identification: BC1.2 identification of standard USB and DCP chargers; Type-C CC pin detection; PD handshaking; and PPS programmable voltage

2. Input Current Limiting: Control of the upper current limit for USB 5V ports (100mA/500mA/3A); automatic reduction of charging current to ensure the total current of the system load plus charging does not exceed the USB host limit (LTC4066 typical)

3. PowerPath Intelligent Power Selection: Automatic switching between USB adaptor and battery; load-priority power supply with peak current supplemented by the battery; supports hot-swapping and plug-and-play boot-up

4. OTG Reverse Boost: The charging IC operates in reverse mode, with the battery boosting the output to 5V/9V/12V for peripherals; commonly used in mobile phones, portable power banks and dashcams (MAX77789, MAX77975)

5. Device Classification

- Entry-level 5V BC1.2: LTC4066, MAX8934B; single-cell linear chargers, suitable for traditional USB 5V charging

- Type-C PD buck chargers: MAX77785/77786/77972, with integrated CC detection, 3A–5.5A, PPS, high efficiency; used in tablets, portable cameras and power tools

- Integrated PMIC: ADP5360, integrating a linear charger + ModelGauge battery monitor + Buck/Buck-Boost LDO; suitable for wearables and small medical devices

- Discrete PD controller: used with an external DC-DC converter to implement high-power USB-PD charging solutions

IV. Quick Selection Comparison

- Low-current TWS / fitness trackers: Linear charger LTC4066 + discrete battery gauge MAX17043 / MAX17211

- Single-cell Type-C fast charging: MAX77786, MAX77975 (Buck charging + PD + OTG)

- Integrated battery pack (charging + metering + protection): MAX17330/MAX17335 (1S), MAX17320 (2–4S)

- Energy storage / automotive multi-cell BMS: LTC68xx cell monitoring + LTC2949 total current metering

- Solar / multi-chemistry industrial charging: LTC4162

V. Typical Application Scenarios

Wearables, TWS, handheld medical devices: ultra-low IQ, single-cell lithium batteries, low current, EZ battery monitor with no calibration required

Consumer electronics (tablets, compact cameras): USB-C PD, high-current buck charging, OTG

Power tools, robot vacuum cleaners: multi-cell battery packs, pack-side fuel gauge + balancing + encryption

Energy storage, portable PV power supplies: LTC4162 MPPT, multi-chemistry support

Automotive BMS: LTC68xx isolated cell monitoring, ISO 26262