I2C Controlled 4.5A Single Cell USB/Adapter Charger With Narrow VDC Power Path Management and USB OTG.
DESCRIPTION
The bq24190, bq24192, bq24192I, and bq24193 are highly-integrated switch-mode battery charge management and system power path management devices for single cell Li-Ion and Li-polymer battery in a wide range of tablet and other portable devices. Its low impedance power path optimizes switch-mode operation efficiency, reduces battery charging time and extends battery life during discharging phase. The I2C serial interface with charging and system settings makes the device a truly flexible solution.
The device supports a wide range of input sources, including standard USB host port, USB charging port and high power DC adapter. To set the default input current limit, the bq24190 detects the input source following the USB battery charging spec 1.2, and the bq24192, bq24192I, and bq24193 takes the results from detection circuit in the system, such as USB PHY device. The bq24190,192,192I, and 193 are compliant with USB 2.0 and USB 3.0 power specifications with input current and voltage regulation. Meanwhile, the bq24190, bq24192, bq24192I,and bq24193 meets USB On-the-Go operation power rating specification by supplying 5V on the VBUS with a current limit up to 1.3A.
The power path management regulates the system slightly above battery voltage but does not drop below 3.5V minimum system voltage (programmable). With this feature, the system maintains operation even when the battery is completely depleted or removed. When the input current limit or voltage limit is reached, the power path management automatically reduces the charge current to zero. As the system load continues to increase, the power path discharges the battery until the system power requirement is met. This supplement mode operation prevents overloading the input source.
The devices initiate and complete a charging cycle without software control. It automatically detects the battery voltage and charges the battery in three phases: pre-conditioning, constant current and constant voltage. At the end of the charging cycle, the charger automatically terminates when the charge current is below a preset limit in the constant voltage phase. When the full battery falls below the recharge threshold, the charger will automatically start another charging cycle.
The bq24190, bq24192, bq24192I, and bq24193 provide various safety features for battery charging and system operation, including dual pack negative thermistor monitoring, charging safety timer and over-voltage/overcurrent protections. The bq24193 supports JEITA guideline compliant temperature profile. The thermal regulation reduces charge current when the junction temperature exceeds 120°C (programmable). The STAT output reports the charging status and any fault conditions. The PG output in the bq24192, bq24192I, and bq24193 indicates if a good power source is present. The INT immediately notifies the host when a fault occurs.
The bq24190, bq24192, bq24192I, and bq24193 are available in a 24-pin, 4x4 mm2 thin QFN package.
FEATURES
• High Accuracy (0°C to 125°C)
– ±0.5% Charge Voltage Regulation 2 • High Efficiency 4.5A Switch Mode Charger
– 92% Charge Efficiency at 2A, 90% at 4A – ±7% Charge Current Regulation
– Accelerate Charge Time by Battery Path – ±7.5% Input Current Regulation Impedance Compensatioin – ±2% Output Regulation in Boost Mode
• Highest Battery Discharge Efficiency with • High Integration 12mΩ Battery Discharge MOSFET up to 9A – Power Path Management Discharge Current – Synchronous Switching MOSFETs
• Single Input USB-compliant/Adapter Charger – Integrated Current Sensing
– USB Host or Charging Port D+/D- Detection – Bootstrap Diode Compatible to USB Battery Charger Spec
1.2 – Internal Loop Compensation
– Input Voltage and Current Limit Supports • Safety USB2.0 and USB 3.0 – Battery Temperature Sensing and Charging
– Input Current Limit: 100mA, 150mA, 500mA, Safety Timer 900mA, 1.2A, 1.5A, 2A and 3A – JEITA Guideline Compliant (bq24193)
• 3.9V–17V Input Operating Voltage Range – Thermal Regulation and Thermal Shutdown
– Support All Kinds of Adapter with Input – Input System Over-Voltage Protection Voltage DPM Regulation – MOSFET Over-Current Protection
• USB OTG 5V at 1.3A Synchronous Boost • Charge Status Outputs for LED or Host Converter Operation Processor
– 93% 5V Boost Efficiency at 1A • Low Battery Leakage Current and Support
• Narrow VDC (NVDC) Power Path Management Shipping Mode
– Instant-on Works with No Battery or Deeply • 4mm x 4mm QFN-24 Package Discharged Battery
– Ideal Diode Operation
APPLICATIONS
• Tablet PC Inductor • Portable Audio Speaker
• 1.5MHz Switching Frequency for Low Profile • Smart Phone
• Autonomous Battery Charging with or without • Portable Media Players
• Internet Devices Host Management
DESCRIPTION
The bq24190, bq24192, bq24192I, and bq24193 are highly-integrated switch-mode battery charge management and system power path management devices for single cell Li-Ion and Li-polymer battery in a wide range of tablet and other portable devices. Its low impedance power path optimizes switch-mode operation efficiency, reduces battery charging time and extends battery life during discharging phase. The I2C serial interface with charging and system settings makes the device a truly flexible solution.
The device supports a wide range of input sources, including standard USB host port, USB charging port and high power DC adapter. To set the default input current limit, the bq24190 detects the input source following the USB battery charging spec 1.2, and the bq24192, bq24192I, and bq24193 takes the results from detection circuit in the system, such as USB PHY device. The bq24190,192,192I, and 193 are compliant with USB 2.0 and USB 3.0 power specifications with input current and voltage regulation. Meanwhile, the bq24190, bq24192, bq24192I,and bq24193 meets USB On-the-Go operation power rating specification by supplying 5V on the VBUS with a current limit up to 1.3A.
The power path management regulates the system slightly above battery voltage but does not drop below 3.5V minimum system voltage (programmable). With this feature, the system maintains operation even when the battery is completely depleted or removed. When the input current limit or voltage limit is reached, the power path management automatically reduces the charge current to zero. As the system load continues to increase, the power path discharges the battery until the system power requirement is met. This supplement mode operation prevents overloading the input source.
The devices initiate and complete a charging cycle without software control. It automatically detects the battery voltage and charges the battery in three phases: pre-conditioning, constant current and constant voltage. At the end of the charging cycle, the charger automatically terminates when the charge current is below a preset limit in the constant voltage phase. When the full battery falls below the recharge threshold, the charger will automatically start another charging cycle.
The bq24190, bq24192, bq24192I, and bq24193 provide various safety features for battery charging and system operation, including dual pack negative thermistor monitoring, charging safety timer and over-voltage/overcurrent protections. The bq24193 supports JEITA guideline compliant temperature profile. The thermal regulation reduces charge current when the junction temperature exceeds 120°C (programmable). The STAT output reports the charging status and any fault conditions. The PG output in the bq24192, bq24192I, and bq24193 indicates if a good power source is present. The INT immediately notifies the host when a fault occurs.
The bq24190, bq24192, bq24192I, and bq24193 are available in a 24-pin, 4x4 mm2 thin QFN package.
FEATURES
• High Accuracy (0°C to 125°C)
– ±0.5% Charge Voltage Regulation 2 • High Efficiency 4.5A Switch Mode Charger
– 92% Charge Efficiency at 2A, 90% at 4A – ±7% Charge Current Regulation
– Accelerate Charge Time by Battery Path – ±7.5% Input Current Regulation Impedance Compensatioin – ±2% Output Regulation in Boost Mode
• Highest Battery Discharge Efficiency with • High Integration 12mΩ Battery Discharge MOSFET up to 9A – Power Path Management Discharge Current – Synchronous Switching MOSFETs
• Single Input USB-compliant/Adapter Charger – Integrated Current Sensing
– USB Host or Charging Port D+/D- Detection – Bootstrap Diode Compatible to USB Battery Charger Spec
1.2 – Internal Loop Compensation
– Input Voltage and Current Limit Supports • Safety USB2.0 and USB 3.0 – Battery Temperature Sensing and Charging
– Input Current Limit: 100mA, 150mA, 500mA, Safety Timer 900mA, 1.2A, 1.5A, 2A and 3A – JEITA Guideline Compliant (bq24193)
• 3.9V–17V Input Operating Voltage Range – Thermal Regulation and Thermal Shutdown
– Support All Kinds of Adapter with Input – Input System Over-Voltage Protection Voltage DPM Regulation – MOSFET Over-Current Protection
• USB OTG 5V at 1.3A Synchronous Boost • Charge Status Outputs for LED or Host Converter Operation Processor
– 93% 5V Boost Efficiency at 1A • Low Battery Leakage Current and Support
• Narrow VDC (NVDC) Power Path Management Shipping Mode
– Instant-on Works with No Battery or Deeply • 4mm x 4mm QFN-24 Package Discharged Battery
– Ideal Diode Operation
APPLICATIONS
• Tablet PC Inductor • Portable Audio Speaker
• 1.5MHz Switching Frequency for Low Profile • Smart Phone
• Autonomous Battery Charging with or without • Portable Media Players
• Internet Devices Host Management
