## Overview of the ADP5062ACPZ-2-R7 The **ADP5062ACPZ-2-R7** is a highly integrated linear battery charger management IC designed by Analog Devices. It is specifically engineered to handle single-cell Li-Ion or Li-Polymer batteries, focusing on high efficiency, safety, and a small physical footprint. --- ### 1. Key Technical Specifications | Feature | Specification | | :--- | :--- | | **Manufacturer** | Analog Devices | | **Function** | Linear Battery Charger | | **Battery Chemistry** | Li-Ion, Li-Polymer | | **Input Voltage Range** | 4.0V to 6.7V (Up to 15V tolerant) | | **Max Charge Current** | 1300 mA (Programmable) | | **Interface** | I2C (for programming/status) | | **Package** | 20-Lead LFCSP (4mm x 4mm) | | **Operating Temp** | -40°C to +125°C | --- ### 2. Major Functional Components The internal architecture of the ADP5062 consists of several critical electronic blocks: #### A. Charging Control Engine This block manages the charging profile, transitioning through the standard phases: 1. **Trickle Charge:** For deeply discharged batteries. 2. **Constant Current (CC):** Fast charging at the programmed limit. 3. **Constant Voltage (CV):** Maintaining voltage while current tapers. #### B. I2C Interface Unlike basic chargers, the ADP5062 allows a microcontroller to dynamically adjust parameters such as: * Termination voltage. * Fast charge current limits. * Safety timer durations. #### C. Power Path Management The IC manages the flow between the input source (USB or Wall adapter), the battery, and the system load. It ensures that the system can power up even if the battery is dead or missing. #### D. Protection Circuitry The chip includes several safety mechanisms: * **Thermal Regulation:** Reduces charge current if the die temperature rises too high. * **JEITA Compliance:** Adjusts charging based on battery temperature (NTC thermistor input). * **Overvoltage Protection (OVP):** Protects against spikes on the input rail. --- ### 3. Pin Configuration Highlights | Pin | Name | Description | | :--- | :--- | :--- | | **VIN** | Input Supply | Connection to USB or DC power source. | | **ISO_B** | Battery Isolation | Connects to the positive terminal of the battery. | | **VINDOK** | Input OK | Open-drain output indicating valid input voltage. | | **SDA/SCL** | I2C Data/Clock | Communication lines for configuration. | | **THR** | Thermistor Input | Connects to NTC to monitor battery temperature. | --- ### 4. Typical Application Circuit Example The following is a representation of how the IC is integrated into a system: ```mermaid graph LR USB_5V -->|Input| ADP5062 ADP5062 -->|Charge| Li-Ion_Battery ADP5062 -->|Power| System_Load MCU -->|I2C| ADP5062 NTC_Sensor -->|Temp Sense| ADP5062 ```