BQ24195LRGER

The bq24195L, bq24195 are highly-integrated switchmode 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 5.1 V on PMID pin with minimum current of 1.0 A (bq24195L) or 2.1 A (bq24195). 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.

Applications

• Power Bank for Smartphone, Tablet
• Tablet PC and Smart Phone
• Portable Audio Speaker
• Portable Media Players
• Internet Devices

Key features

• High Efficiency Switch Mode Charger – 2.5-A (bq24195L) or 4.5-A (bq24195) Fast Charging – 92% Charge Efficiency at 2 A, 90% at 4 A
• Synchronous Boost Converter in Battery Boost Mode – 5.1 V at 1 A (bq24195L) or 5.1 V at 2.1 A (bq24195) – 94% 5.1-V Boost Efficiency at 1 A, 91% at 2.1 A
• Highest Battery Discharge Efficiency with 12 mΩ Battery Discharge MOSFET up to 9-A Discharge Current
• 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 USB3.0 – Input Current Limit: 100 mA, 150 mA, 500 mA, 900 mA, 1.2 A, 1.5 A, 2 A and 3 A
• 3.9-V to 17-V 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 Discharged Battery – Ideal Diode Operation in Battery Supplement Mode 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