BQ25895MRTWR

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BQ25895MRTWR

Single Cell 5A Fast Charger MaxCharge™ Technology for High Input Voltage and 3.1A Boost

Packaging

Package | PIN: RTW | 24
Temp: I (-40 to 85)
Carrier: Cut Tape
Qty Price
1-9 $2.70
10-24 $2.43
25-99 $2.27
100-249 $2.03
250-499 $1.90
500-749 $1.65
750-999 $1.43
1000+ $1.40

Features

  • High Efficiency 1.5-MHz Switch Mode Buck Charge
    • 93% Charge Efficiency at2 A and 91% Charge Efficiency at3 A Charge Current
    • Optimize for High Voltage Input (9 V/ 12 V)
    • Low Power PFM mode for Light LoadOperations
  • Boost Mode Operation with Adjustable Output from 4.5 V to 5.5 V
    • Selectable500-KHz / 1.5-MHz Boost Converter with up-to 3.1 A Output
    • 93% BoostEfficiency at 5 V at 1 A Output
    • Support down-to 2.5V Battery
    • Support PWM only or PFM/PWM control for Light Load Efficiency
  • Integrated Control to Switch Between Charge and Boost Mode
  • Single Input to Support USB Input and Adjustable High Voltage Adapters
    • Support 3.9-V to 14-V InputVoltage Range
    • Input Current Limit (100 mA to 3.25 A with 50-mA resolution) toSupport USB2.0, USB3.0 standard and High Voltage Adapters
    • Maximum PowerTracking by Input Voltage Limit up-to 14V for Wide Range of Adapters
    • Auto Detect USB SDP, CDP, DCP, andNon-standard Adapters
  • Input Current Optimizer (ICO) to Maximize Input Power without Overloading Adapters
  • Resistance Compensation (IRCOMP) from Charger Output to Cell Terminal
  • Highest Battery Discharge Efficiency with 11-mΩ Battery Discharge MOSFET up to 9 A
  • Integrated ADC for System Monitor
    (Voltage, Temperature, Charge Current)
  • BATFET Control to Support Ship Mode, Wake Up, and Full System Reset
  • Flexible Autonomous and I2C Mode for Optimal System Performance
  • High Integration includes all MOSFETs, Current Sensing and Loop Compensation
  • 12-µA Low Battery Leakage Current to Support Ship Mode
  • High Accuracy
    • ±0.5% Charge VoltageRegulation
    • ±5% Charge Current Regulation
    • ±7.5% InputCurrentRegulation
  • Safety
    • BatteryTemperature Sensing for Charge and Boost Mode
    • Thermal Regulation and Thermal Shutdown
  • Create a Custom Design Using the bq25895M With the WEBENCH® Power Designer

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Texas Instruments  BQ25895MRTWR

The bq25895M is a highly-integrated 5-A switch-mode batterycharge management and system power path management device for single cell Li-Ion and Li-polymerbattery. The devices support high input voltage fast charging. The low impedance power pathoptimizes switch-mode operation efficiency, reduces battery charging time and extends battery lifeduring discharging phase. The I2C Serial interface with charging andsystem settings makes the device a truly flexible solution.

The bq25895M is a highly-integrated 5-A switch-mode battery chargemanagement and system power path management device for single cell Li-Ion and Li-polymer battery.It features fast charging with high input voltage support for a wide range of smartphone, tabletand portable devices. Its low impedance power path optimizes switch-mode operation efficiency,reduces battery charging time and extends battery life during discharging phase. It also integratesInput Current Optimizer (ICO) and Resistance Compensation (IRCOMP) to deliver maximum chargingpower to battery. The solution is highly integrated with input reverse-blocking FET (RBFET, Q1),high-side switching FET (HSFET, Q2), low-side switching FET (LSFET, Q3), and battery FET (BATFET,Q4) between system and battery. It also integrates the bootstrap diode for the high-side gate driveand battery monitor for simplified system design. The I2C serialinterface with charging and system settings makes the device a truly flexible solution

The device supports a wide range of input sources, including standardUSB host port, USB charging port, and USB compliant adjustable high voltage adapter. To supportfast charging using adjustable high voltage adapter, the bq25895M provides supportMaxChargeTM handshake using D+/D- pins and DSEL pin for USB switchcontrol. In addition, the device includes interface to support adjustable high voltage adapterusing input current pulse protocol. To set the default input current limit, device uses thebuilt-in USB interface. The device is compliant with USB 2.0 and USB 3.0 power spec with inputcurrent and voltage regulation. In addition, the Input Current Optimizer (ICO) supports thedetection of maximum power point detection of the input source without overload. The devicesupports battery boost operation by supplying adjustable 4.5V-5.5V on PMID pin with up to 3.1A withintegrated charge and boost mode detection

The power path management regulates the system slightly above battery voltage but doesnot drop below 3.5V minimum system voltage (programmable). With this feature, the system maintainsoperation even when the battery is completely depleted or removed. When the input current limit orvoltage limit is reached, the power path management automatically reduces the charge current tozero. As the system load continues to increase, the power path discharges the battery until thesystem power requirement is met. This Supplemental Mode operation preventsoverloading the input source.

The device initiates and completes a charging cycle without software control. Itautomatically 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, thecharger automatically terminates when the charge current is below a preset limit in the constantvoltage phase. When the full battery falls below the recharge threshold, the charger willautomatically start another charging cycle.

The charger provides various safety features for battery charging and system operations,including battery temperature negative thermistor monitoring, charging safety timer andovervoltage/overcurrent protections. The thermal regulation reduces charge current when thejunction temperature exceeds 120°C (programmable). The STAT output reports the charging status andany fault conditions. The INT immediately notifies host when fault occurs.

The device also provides a 7-bit analog-to-digital converter (ADC) for monitoring chargecurrent and input/battery/system (VBUS, BAT, SYS, TS) voltages. The QON pin provides BATFETenable/reset control to exit low power ship mode or full system reset function.

The device family is available in 24-pin, 4 x 4 mm2 x 0.75 mmthin WQFN package.