STBC02AJR

Product Overview

The STMicroelectronics STBC02AJR is a highly integrated, single-chip power management IC designed primarily for USB Power Delivery (PD) and battery charger applications. It functions as a USB Type-C controller with integrated power path management, battery charger controller, and USB PD protocol engine. This device is optimized for efficient, safe, and reliable charging of single-cell lithium-ion/polymer batteries while managing USB Type-C power roles and PD communication.

The STBC02AJR supports USB PD 3.0 specifications and offers a complete solution for modern mobile and portable devices requiring flexible power delivery and smart battery charging. It incorporates programmable power path control and protection features to ensure robust operation and compliance with USB PD standards.

Key Features

* USB Type-C Controller: Manages USB Type-C cable orientation, role detection, and power delivery negotiation compliant with USB PD 3.0.
* Integrated Battery Charger Controller: Supports single-cell Li-ion/polymer battery charging with programmable charge current and voltage.
* Power Path Management: Seamlessly switches power sources between USB input and battery output, enabling simultaneous load operation and charging.
* USB PD Protocol Engine: Embedded hardware state machine for USB Power Delivery communication and negotiation.
* Programmable Output Voltage: Supports adjustable battery charge voltage up to 4.4 V.
* Fast Charge and Trickle Charge Modes: Optimized charging algorithms to safely and efficiently charge batteries from low or high states of charge.
* Integrated Protections: Overvoltage, overcurrent, thermal shutdown, and short-circuit protections.
* I²C Interface: Allows external host microcontroller communication for configuration, monitoring, and control.
* Flexible Input Voltage Range: Supports input from USB standard 5 V up to programmable higher voltages as per PD profiles.
* Thermal Regulation: Adaptive charging current control based on device temperature to prevent overheating.
* Package: Compact QFN package suitable for space-constrained portable devices.
* Operating Temperature: Industrial range, suitable for consumer and industrial applications.

Specifications

* Input Voltage Range: 4.5 V to 24 V (compatible with USB PD voltages)
* Battery Charge Voltage: Programmable up to 4.4 V for single-cell Li-ion/polymer batteries
* Charge Current: Programmable up to 3 A, depending on thermal and power limits
* USB PD Version: Supports USB Power Delivery Specification Rev 3.0
* USB Type-C Role Support: Source, Sink, and Dual Role Power (DRP) operation
* Communication Interface: I²C up to 400 kHz for device control and status monitoring
* Protection Features: Overvoltage protection (OVP), undervoltage lockout (UVLO), overcurrent protection (OCP), thermal shutdown
* Charge Algorithm: Supports constant current (CC), constant voltage (CV), and trickle charge modes
* Power Path Management: Automatic switch between USB input and battery supply to system load
* Package Type: QFN, typically 4 mm × 4 mm or similar compact size
* Operating Temperature Range: –40°C to +85°C

Functional Characteristics

The STBC02AJR integrates all necessary functions for a USB Type-C power delivery port controller and single-cell battery charger into a single device. Its embedded USB PD protocol engine handles communication over the CC (Configuration Channel) lines, negotiating voltage and current contracts with compliant USB PD power sources.

The power path management circuitry ensures seamless transition between power sources—either USB input or battery—to the system load without interruptions or brownouts. This feature is critical for portable devices requiring uninterrupted operation during charging.

The device implements a full battery charging profile including trickle charge for deeply discharged batteries, constant current mode to rapidly charge the battery, and constant voltage mode to safely top off the battery without overcharging.

Thermal regulation dynamically adjusts charging current to prevent overheating, enhancing device and battery safety. Protection features such as overvoltage and overcurrent detection prevent damage under fault conditions.

Via the I²C interface, an external microcontroller can configure charging parameters, monitor battery status, retrieve fault information, and control USB PD negotiation, allowing flexible integration in complex systems.

Applications

* Smartphones, tablets, and wearable devices with USB Type-C charging ports
* Power banks and portable battery packs supporting USB PD
* USB Type-C power adapters and hubs with battery charging capabilities
* Portable media players and IoT devices requiring efficient battery management
* Embedded systems requiring smart USB PD and battery charger integration

Package and Integration

The STBC02AJR is housed in a small QFN package, facilitating compact PCB layouts in portable devices. It requires minimal external components including USB Type-C connectors, a few resistors for CC line configuration, and passive components for battery and input current sensing.

Its integration of USB PD communication, battery charger control, and power path management reduces bill of materials (BOM) and system complexity. This integration accelerates time-to-market for USB Type-C enabled products.

Power Management and Safety

The device supports a wide input voltage range compatible with USB PD’s multiple voltage levels (5 V, 9 V, 15 V, 20 V), allowing dynamic adjustment of charging power based on power source capabilities and battery conditions.

Comprehensive safety features, including thermal regulation and built-in fault detection, ensure reliable operation under varying environmental and usage conditions. The device’s compliance with USB PD 3.0 ensures interoperability with a broad range of chargers and power sources.

Conclusion

The STMicroelectronics STBC02AJR is a highly integrated, versatile USB Type-C controller and single-cell battery charger solution designed for modern portable devices requiring smart power delivery and efficient battery management. Its embedded USB PD protocol support, programmable charge profiles, power path management, and safety features make it an excellent choice for designers aiming to implement compact, reliable, and standards-compliant charging systems. The device’s combination of small footprint, integration level, and configurability supports efficient system design while ensuring user safety and battery longevity.