### Overview of ADP5065ACBZ-1-R7 The **ADP5065ACBZ-1-R7** is a highly integrated linear battery charger management IC designed specifically for single-cell Li-ion or Li-polymer batteries. It is engineered to operate efficiently from multiple power sources, including USB ports and wall adapters. --- ### Key Technical Specifications | Parameter | Specification | |:---|:---| | **Manufacturer** | Analog Devices Inc. (ADI) | | **Battery Chemistry** | Lithium-Ion / Lithium-Polymer | | **Number of Cells** | 1 (Single Cell) | | **Input Voltage Range** | 4.0V to 5.5V (Absolute Max: 20V) | | **Charge Current** | Up to 1.3A (Programmable) | | **Interface** | I²C Serial Interface | | **Package Type** | 20-ball WLCSP (Wafer Level Chip Scale Package) | --- ### Core Functional Blocks #### 1. Charging Management The device operates in several modes to ensure battery safety and longevity: * **Trickle Charge:** For deeply discharged batteries. * **Constant Current (CC):** Fast charging at the programmed rate. * **Constant Voltage (CV):** Maintaining precise voltage (typically 4.2V) as current tapers off. #### 2. Isolation and System Power The IC features a **Power Path Management** system. This allows the device to power the system load even when the battery is completely discharged or missing, prioritizing the system power over the battery charging current. #### 3. Protection Mechanisms * **Thermal Management:** Integrated thermal limiting reduces charge current if the die temperature exceeds a threshold. * **JEITA Compliance:** It monitors battery temperature via an external NTC thermistor and adjusts charging parameters to meet JEITA safety standards. * **Overvoltage Protection (OVP):** Protects the internal circuitry from high-voltage transients on the input. --- ### Programming and Control (I²C) The "1" in the part number indicates a specific default register configuration. However, most parameters are adjustable via the **I²C interface**: * Termination voltage levels. * Fast-charge current limits. * Safety timer durations. * Interrupt masking for status reporting. --- ### Typical Application Circuit Snippet ```c // Example pseudo-code for I2C initialization of ADP5065 void setup_charger() { I2C_Write(ADP5065_ADDR, CHG_CURR_REG, 0x0A); // Set Charge Current to 500mA I2C_Write(ADP5065_ADDR, TERM_VOLT_REG, 0x02); // Set Termination Voltage to 4.2V I2C_Write(ADP5065_ADDR, EN_REG, 0x01); // Enable Charging } ``` ---