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IC BATT CHG LI-ION 1CELL 24VQFN
• High Efficiency Switch Mode Charger
– 2.5A(bq24195L) or 4.5A(bq24195) Fast Charging
– 92% Charge Efficiency at 2A, 90% at 4A
• Synchronous Boost Converter in Battery Boost Mode
– 5.1V at 1A (bq24195L) or 5.1V at 2.1A (bq24195)
– 94% 5.1V Boost Efficiency at 1A, 91% at 2.1A
• Highest Battery Discharge Efficiency with
12mΩ Battery Discharge MOSFET up to 9A
• Single Input USB-compliant/Adapter Charger
– USB Host or Charging Port D+/D- Detection Compatible to USB Battery Charger Spec 1.2
– Input Voltage and Current Limit Supports USB2.0 and USB 3.0
– Input Current Limit: 100mA, 150mA, 500mA, 900mA, 1.2A, 1.5A, 2A and 3A
• 3.9V–17V Input Operating Voltage Range
– Support All Kinds of Adapter with Input Voltage DPM Regulation
• Narrow VDC (NVDC) Power Path Management
– Instant-on Works with No Battery or Deeply
– Ideal Diode Operation in Battery Supplement Mode
• 1.5MHz 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
– 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
• 4mm x 4mm QFN-24 Package
• Power Bank for Smartphone, Tablet
• Tablet PC
• Smart Phone
• Portable Audio Speaker
• Portable Media Players
• Internet Devices
The bq24195L, bq24195 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 power bank, 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 bq24195L, bq24195 detects the input source following the USB battery charging spec 1.2. The bq24195/bq24195L are compliant with USB 2.0 and USB 3.0 power specifications with input current and voltage regulation. The bq24195L, bq24195 supports battery boost operation by supplying 5.1V on PMID pin with minimum current of 1.0A (bq24195L) or 2.1A (bq24195).
The devices provide 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 INT immediately notifies the host when a fault occurs.
The bq24195 and bq24195L are available in a 24-pin, 4x4 mm2
thin QFN package.
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