Gehäuseinformationen
| Gehäuse | Pins VQFN (RGE) | 24 |
| Betriebstemperaturbereich (°C) -40 to 85 |
| Gehäusemenge | Träger 250 | SMALL T&R |
Merkmale von BQ24196
- High Efficiency 2.5-A Switch Mode Charger
- 92% Charge Efficiency at 2 A
- Highest Battery Discharge Efficiency with 12-mΩ
Battery Discharge MOSFET up to 9-A Discharge Current - Single Input USB-compliant/Adapter Charger
- Input Voltage and Current Limit Supports USB2.0
and USB3.0 - Input Current Limit: 100 mA, 150 mA, 500 mA, 900 mA,
1.2 A, 1.5 A, 2 A and 3 A
- Input Voltage and Current Limit Supports USB2.0
- 3.9-V to 17-V Input Operating Voltage Range
- Support All Kinds of Adapter with Input Voltage DPM
Regulation
- Support All Kinds of Adapter with Input Voltage DPM
- USB OTG 5 V at 1.3-A Synchronous Boost Converter
Operation- 93% 5-V Boost Efficiency at 1 A
- Narrow VDC (NVDC) Power Path Management
- Instant-on Works with No Battery or Deeply Discharged
Battery - Ideal Diode Operation in Battery Supplement Mode
- Instant-on Works with No Battery or Deeply Discharged
- 1.5-MHz Switching Frequency for Low Profile Inductor
- Autonomous Battery Charging with or without Host
Management- Battery Charge Enable
- Battery Charge Preconditioning
- Charge Termination and Recharge
- High Accuracy (0°C to 125°C)
- ±0.5% Charge Voltage Regulation
- ±7% Charge Current Regulation
- ±7.5% Input Current Regulation
- ±2% Output Regulation in Boost Mode
- High Integration
- Power Path Management
- Synchronous Switching MOSFETs
- Integrated Current Sensing
- Bootstrap Diode
- Internal Loop Compensation
- Safety
- Battery Temperature Sensing and Charging Safety Timer
- Thermal Regulation and Thermal Shutdown
- Input System Over-Voltage Protection
- MOSFET Over-Current Protection
- Charge Status Outputs for LED or Host Processor
- Low Battery Leakage Current and Support Shipping Mode
- 4.00 mm × 4.00 mm VQFN-24 Package
Beschreibung von BQ24196
The bq24196 is 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. The bq24196 takes the result from detection circuit in the system, such as USB PHY device. The bq24196 is compliant with USB 2.0 and USB 3.0 power spec with input current and voltage regulation. Meanwhile, the bq24196 meets USB On-the-Go operation power rating specification by supplying 5 V on VBUS with current limit up to 1.3 A.
The power path management regulates the system slightly above battery voltage but does not drop below 3.5-V 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 device initiates and completes 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 device provides various safety features for battery charging and system operation, including negative thermistor monitoring, charging safety timer and over-voltage/over-current protections. 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 bq24196 indicates if a good power source is present. The INT immediately notifies the host when a fault occurs.
The bq24196 is available in a 24-pin, 4.00 × 4.00 mm2 thin VQFN package.