BQ 24188 Mobile Phone IC
High-Performance Power Management
The BQ 24188 Mobile Phone IC is designed to deliver exceptional performance for modern smartphones. With advanced power management capabilities, it ensures efficient energy regulation, maximizing battery life and maintaining device reliability. BQ 24188 Mobile Phone IC
Compact Design for Seamless Integration
Engineered with a compact form factor, this Mobile Phone IC is perfect for space-constrained designs. It integrates seamlessly into existing mobile platforms, offering an optimal solution for high-density electronic assemblies. BQ 24188 Mobile Phone IC
Robust and Reliable Functionality
Built to meet rigorous quality standards, the BQ 24188 IC offers robust functionality and long-term reliability. It is an ideal choice for powering your mobile devices with consistent and dependable performance. BQ 24188 Mobile Phone IC
The BQ24188 is a highly integrated, switch-mode battery charge management and system power path management device designed for single-cell Li-ion and Li-polymer batteries. Developed by Texas Instruments, this IC is a staple in the mobile phone industry—specifically within brands like Xiaomi, Oppo, and Vivo—due to its high efficiency and small footprint. BQ 24188 Mobile Phone IC
Below is the comprehensive technical breakdown and full specifications of the BQ24188. BQ 24188 Mobile Phone IC
1. Core Specifications Overview
The BQ24188 is engineered to handle high-current charging while managing power distribution between the external power source (USB/Wall adapter), the system load, and the battery.
| Feature | Specification |
| Manufacturer | Texas Instruments (TI) |
| Input Voltage (Max Rating) | 30V DC |
| Operating Input Voltage | 4.0V to 10.5V (OVP at 15.5V or 6.5V) |
| Maximum Charge Current | 2.0A |
| Switching Frequency | 1.5 MHz |
| Efficiency (Peak) | Up to 93% |
| USB OTG Support | 5V at 1A (Boost Mode) |
| Interface | I2C (Serial Data/Clock) |
| Package Options | 36-ball WCSP (2.4mm x 2.4mm) or 24-pin QFN |
2. Electrical Characteristics
These parameters define the limits and performance capabilities of the IC under various operating conditions.
Power Path and Charging
The BQ24188 utilizes “Power Path Management,” allowing the device to power the system instantly even if the battery is completely discharged or missing.
| Parameter | Value / Range |
| Regulation Voltage | 3.5V to 4.44V (Adjustable via I2C) |
| Charge Current Accuracy | ±5% |
| Termination Current | 50mA to 400mA |
| Pre-charge Current | 50mA to 650mA |
| Input Current Limit | 100mA to 2.0A (USB 2.0/3.0 Compliant) |
| Internal MOSFET RDS(on) | 17 mΩ (Power Path) |
Protection and Safety
-
Thermal Regulation: Automatically reduces charge current if the die temperature reaches 125°C.
-
JEITA Compliance: Monitors battery temperature via a thermistor (TS pin) and adjusts voltage/current to ensure safety in cold or hot environments.
-
OVP/OCP: Over-voltage and over-current protection for both the input and the battery.
3. Pin Configuration and Functions
While the package is tiny, each pin serves a critical role in the charging ecosystem.
| Pin Name | Type | Description |
| IN | Input | Input power source connection (USB or Adapter). |
| SYS | Output | System voltage output; provides power to the mobile device. |
| BAT | Input/Output | Connection to the positive terminal of the battery. |
| SDA / SCL | I/O | I2C interface pins for communication with the host processor. |
| SW | Power | Switching node for the internal buck converter. |
| PMID | Output | Power management bypass point; used for USB OTG boost. |
| TS | Input | Temperature sensing input (NTC thermistor). |
| INT | Output | Interrupt signal to the host to notify status changes. |
4. Key Functional Modes
The BQ24188 operates in several distinct modes depending on the power state:
-
Charge Mode: The IC takes input power to simultaneously supply the system and charge the battery. It uses a three-phase cycle: Pre-charge, Constant Current (CC), and Constant Voltage (CV).
-
Boost Mode (USB OTG): When a peripheral needs power, the IC reverses the process, boosting battery voltage to 5V to power a device connected to the USB port.BQ 24188 Mobile Phone IC
-
Shipping Mode: A low-power state that disconnects the battery from the system to prevent drain during long-term storage or transit. BQ 24188 Mobile Phone IC
-
DPM (Dynamic Power Management): If the input source cannot provide enough current for both the system and the charger, the IC prioritizes the system and reduces the charging current.
5. Application Scenarios
The BQ24188 is primarily found in:
-
Smartphones and Tablets: As the primary charging controller.
-
Portable Gaming Consoles: Like the Nintendo Switch (where it is a common point of repair).
-
Power Banks: Managing high-efficiency discharge and recharge.
-
Handheld Industrial Terminals: Where reliable power path management is required for 24/7 operation.
Note for Technicians: The BQ24188 is a BGA/WCSP component, meaning the “pins” are actually tiny solder balls underneath the chip. Replacing this IC requires specialized tools like a hot air rework station and high-precision tweezers.
Official Website : https://gaffarmarketdelhi.com
