**ADP5061ACBZ-4-R7: A Comprehensive Technical Overview and Application Guide for the Battery Charger IC**

The ADP5061ACBZ-4-R7 from Analog Devices is a highly integrated, **single-cell Li-Ion battery charger** IC designed for space-constrained portable applications. This device combines high-performance charging management with robust protection features, making it a cornerstone component for modern consumer electronics, including smartphones, tablets, and portable medical devices.

**Technical Architecture and Core Features**

At its heart, the ADP5061 is a **linear charger** that operates from a USB port or a standard AC adapter. Its key differentiator is its high level of integration, which minimizes the need for external components. The IC features a built-in power FET, current sensor, and reverse-blocking protection, enabling a remarkably compact solution footprint.

A standout feature is its **programmable charging profile** via an I²C interface. This allows system designers to finely tune charging parameters—including pre-charge current, fast-charge current, and termination voltage—to optimize for specific battery chemistries and application requirements. The charger supports a maximum input voltage of 5.5V and delivers a programmable charge current of up to 1.5A.

The IC implements a precise, **temperature-monitored charging algorithm** to ensure safety and battery longevity. It includes JEITA compliance, dynamically adjusting charge current and voltage based on the battery's temperature, which is critical for preventing damage under extreme conditions. Furthermore, integrated safety timers provide a fail-safe against overcharging in the event of a defective battery.

**Application Circuit and Design Considerations**

Implementing the ADP5061ACBZ-4-R7 is streamlined by its minimal external component count. A typical application circuit requires only a few passive components: input and output capacitors, a bias resistor, and thermistor network for temperature sensing.

Designers must pay close attention to **thermal management**. As a linear charger, power dissipation (P_DISS = (V_IN - V_BAT) * I_CHG) is a primary concern. For high-current charging with a significant voltage difference between input and battery, the IC can generate substantial heat. Proper PCB layout with an exposed thermal pad is essential for efficient heat sinking away from the IC. In scenarios with high V_IN - V_BAT differentials, reducing the charge current via the I²C interface may be necessary to maintain a safe junction temperature.

The I²C programmability also enables sophisticated system-level power management. A host processor can dynamically reduce the charge current when the system is under heavy processing load to manage overall thermal performance or suspend charging entirely to prioritize a critical function.

**Key Advantages and Target Applications**

The ADP5061 offers several compelling advantages:

* **Miniaturization:** Its high integration enables one of the smallest complete charging solutions on the market.

* **Design Flexibility:** I²C control allows for real-time adjustment of charging parameters.

* **Enhanced Safety:** Comprehensive protection against over-voltage, over-current, and thermal overload.

* **High Accuracy:** Regulates termination voltage to within ±0.5% for maximizing battery capacity and cycle life.

It is ideally suited for applications where size, safety, and intelligence are paramount, such as in **wearable technology**, **IoT devices**, and other advanced portable electronics.

**ICGOODFIND**

ICGOODFIND: The ADP5061ACBZ-4-R7 is an exemplary solution for modern portable device design. Its blend of high integration, flexible programmability, and rigorous safety protocols makes it an superior choice for engineers tackling the challenges of compact form factors and demanding thermal environments. It effectively simplifies the design process while delivering a reliable and efficient charging performance.

**Keywords:**

1. **Li-Ion Battery Charger**

2. **I²C Programmable**

3. **Thermal Management**

4. **JEITA Compliance**

5. **Linear Charger IC**