BQ 24192 Mobile Phone IC
Advanced Charging Control
The BQ 24192 Mobile Phone IC is designed to efficiently manage the charging process of modern mobile devices. Its advanced technology ensures optimal charge distribution, enhancing the overall performance and battery longevity of your device. BQ 24192 Mobile Phone IC
Compact and Reliable
This IC is compact yet loaded with reliability, making it suitable for integration into various smartphone models. With cutting-edge features, it delivers consistent power management, ensuring your device remains operational without any interruptions. BQ 24192 Mobile Phone IC
Easy Integration and Performance
Engineered for seamless compatibility, the BQ 24192 Mobile Phone IC simplifies the design process for manufacturers and supports high-speed charging mechanisms. It’s the perfect solution for ensuring efficiency, durability, and maximum functionality in mobile devices. BQ 24192 Mobile Phone IC
The BQ24192 is a highly integrated switch-mode battery charge management and system power path management device. Manufactured by Texas Instruments, it is a staple in mobile devices like smartphones (common in Xiaomi, Oppo, and Vivo models) and tablets due to its high efficiency and $I^2C$ flexibility. BQ 24192 Mobile Phone IC
Below are the detailed technical specifications and functional overviews. BQ 24192 Mobile Phone IC
1. Technical Specifications Table
| Parameter | Specification Details |
| Manufacturer | Texas Instruments (TI) |
| Input Voltage Range | $3.9\text{ V}$ to $17\text{ V}$ (Operating), up to $22\text{ V}$ (Absolute Max) |
| Max Charge Current | $4.5\text{ A}$ (Programmable via $I^2C$) |
| Charging Efficiency | $92\%$ at $2\text{ A}$, $90\%$ at $4\text{ A}$ |
| Switching Frequency | $1.5\text{ MHz}$ (Allows for low-profile inductors) |
| Battery Chemistry | Single-cell Lithium-Ion (Li-Ion) or Lithium-Polymer (Li-Poly) |
| Charge Voltage Accuracy | $\pm0.5\%$ ($0^{\circ}\text{C}$ to $125^{\circ}\text{C}$) |
| Input Current Limits | $100\text{ mA}, 150\text{ mA}, 500\text{ mA}, 900\text{ mA}, 1.2\text{ A}, 1.5\text{ A}, 2\text{ A}, 3\text{ A}$ |
| USB OTG Output | $5\text{ V}$ at $1.3\text{ A}$ (Boost Mode) |
| Boost Efficiency | $93\%$ at $1\text{ A}$ output |
| Discharge Path Resistance | $12\text{ m}\Omega$ internal MOSFET |
| Package Type | 24-pin VQFN ($4.00\text{ mm} \times 4.00\text{ mm}$) |
| Operating Temp | $-40^{\circ}\text{C}$ to $85^{\circ}\text{C}$ |
2. Key Functional Features
The BQ24192 is designed to manage the delicate balance between the power source (USB/Adapter), the system load, and the battery.
Narrow VDC (NVDC) Power Path
Unlike traditional chargers, the NVDC architecture allows the system to operate even when the battery is completely discharged or removed. The device regulates the system voltage slightly above the battery voltage but never drops below a programmable minimum (typically $3.5\text{ V}$), ensuring “instant-on” capability. BQ 24192 Mobile Phone IC
USB OTG Support
The IC features a synchronous boost converter. When a mobile device needs to act as a host (e.g., powering a USB flash drive), the BQ24192 takes power from the battery and steps it up to $5\text{ V}$ on the VBUS pin with high efficiency. BQ 24192 Mobile Phone IC
Safety & Protections
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Thermal Regulation: Automatically reduces charge current if the junction temperature exceeds $120^{\circ}\text{C}$.
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Input Over-Voltage Protection (OVP): Protects the system from high-voltage spikes on the adapter line.
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Battery Thermistor Monitoring: Supports JEITA-compliant charging profiles by monitoring battery temperature via the TS pins.
3. Pin Configuration Overview
| Pin(s) | Name | Function |
| 1, 24 | VBUS | Charger Input Voltage |
| 2, 3 | PMID | Power Management Input/Output (for OTG boost) |
| 9 | PSEL | Power Source Selection (High = USB, Low = Adapter) |
| 13, 14 | BAT | Battery Connection Pins |
| 15, 16 | SYS | System Power Output |
| 19, 20 | SW | Switching Node for the internal Buck/Boost |
| 22 | REGN | LDO Output for internal/external gate drive |
4. Why it’s used in Mobile Phones
The BQ24192 is chosen for its 4.5-A fast charging capability, which is essential for modern high-capacity smartphone batteries. By using a $1.5\text{ MHz}$ switching frequency, manufacturers can keep the physical size of the charging circuit extremely small, fitting into the thin profiles of modern handsets. Furthermore, its $I^2C$ interface allows the phone’s firmware to dynamically adjust charging parameters based on the thermal state or the specific charger connected.
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