DESCRIPTION
The Texas Instruments bq27541 Li-Ion Battery fuel gauge is a microcontroller peripheral that provides fuel gauging for single-cell Li-Ion Battery packs. The device requires little system microcontroller firmware development for accurate Battery fuel gauging. The bq27541 resides within the Battery pack or on the system’s main-board with an embedded Battery (nonremovable).
The bq27541 uses the patented Impedance Track™ algorithm for fuel gauging, and provides information such as remaining Battery capacity (mAh), state-of-charge (%), run-time to empty (min.), Battery voltage (mV), and temperature (°C).
The bq27541 also features integrated support for secure Battery pack authentication, using the SHA-1/HMAC authentication algorithm.

FEATURES
• Battery Fuel Gauge for 1-Series Li-Ion
   Applications
• Microcontroller Peripheral Provides:
   – Accurate Battery Fuel Gauging
   – Internal Temperature Sensor for System
      Temperature Reporting
   – SHA-1/HMAC Authentication
   – Lifetime Data Logging
   – 96 Bytes of Non-Volatile Scratch Pad
      FLASH
• Battery Fuel Gauging Based on Patented
   Impedance Track™ Technology
   – Models Battery Discharge Curve for
      Accurate Time-To-Empty Predictions
   – Automatically Adjusts for Battery Aging,
      Battery Self-Discharge, and
      Temperature/Rate Inefficiencies
   – Low-Value Sense Resistor (5mΩ to 20mΩ)
• HDQ and I2C™ Interface Formats for
   Communication With Host System
• Small 12-pin 2.5 mm × 4 mm SON Package

APPLICATIONS
• Smartphones
• PDAs
• Digital Still and Video Cameras
• Handheld Terminals
• MP3 or Multimedia Players

The MC33349 is a monolithic lithium Battery protection circuit that is designed to enhance the useful operating life of a one cell rechargeable Battery pack.

Cell protection features consist of internally trimmed charge and discharge voltage limits, discharge current limit detection, and a low current standby mode when the cell is discharged.

This protection circuit requires a minimum number of external components and is targeted for inclusion within the Battery pack.

TPL 121000 is a front terminal Battery up to 12 years expected life under normal float charge As with all CSB batteries, all are rechargeable, highly efficient, leak proof and maintenance free

The MC33348 is a monolithic lithium Battery protection circuit that is designed to enhance the useful operating life of a one cell rechargeable Battery pack. Cell protection features consist of internally trimmed charge and discharge voltage limits, discharge current limit detection with a delayed shutdown, and a virtually zero current sleepmode state when the cell is discharged. An additional feature includes an on–chip charge pump for reduced MOSFET losses while charging or discharging a low cell voltage Battery pack. This protection circuit requires a minimum number of external components and is targeted for inclusion within the Battery pack. This MC33348 is available in standard SOIC 8 lead surface mount package.

• Internally Trimmed Charge and Discharge Voltage Limits
• Discharge Current Limit Detection with Delayed Shutdown
• Virtually Zero Current Sleepmode State when Cells are Discharged
• Charge Pump for Reduced Losses with a Low Cell Voltage Battery Pack
• Dedicated for One Cell Applications
• Minimum Components for Inclusion within the Battery Pack
• Available in a Low Profile Surface Mount Package

The MC33348 is a monolithic lithium Battery protection circuit that is designed to enhance the useful operating life of a one cell rechargeable Battery pack. Cell protection features consist of internally trimmed charge and discharge voltage limits, discharge current limit detection with a delayed shutdown, and a virtually zero current sleepmode state when the cell is discharged. An additional feature includes an on−chip charge pump for reduced MOSFET losses while charging or discharging a low cell voltage Battery pack. This protection circuit requires a minimum number of external components and is targeted for inclusion within the Battery pack. This MC33348 is available in standard SOIC 8 lead surface mount package.

• Internally Trimmed Charge and Discharge Voltage Limits
• Discharge Current Limit Detection with Delayed Shutdown
• Virtually Zero Current Sleepmode State when Cells are Discharged
• Charge Pump for Reduced Losses with a Low Cell Voltage Battery Pack
• Dedicated for One Cell Applications
• Minimum Components for Inclusion within the Battery Pack
• Available in a Low Profile Surface Mount Package

INTRODUCTION
The SMB137B is a programmable single-cell lithium-ion/lithium polymer Battery charger designed for a variety of portable applications. The device provides a simple and efficient way to charge high-capacity Li-Ion batteries via a USB or AC adapter input. Unlike conventional charging devices, the SMB137B’s high-efficiency switch-mode operation eliminates the low charge current and thermal problems of conventional linear solutions. In addition, the switching architecture in conjunction with programmability enables dramatically faster charging– TurboCharge™ mode - from current limited in puts such as USB.

FEATURES & APPLICATIONS
• Automatic Input Current Limit for universal USB/AC/DC adapter compatibility*
• Optional automatic power source detection per latest USB charging specification 1.0
• USB or AC input with automatic input selection and programmable input current limiting (USB2.0 compliant)
• Up to 750mA charging output from 500mA USB port or 1500mA from AC adapter using proprietary “TurboChargeTM Mode”
• Input/output CurrentPath™ control allows system operation with deeply discharged/missing Battery – no start-up delay
• “Low Battery Recovery” mode for >500mA startup from 100mA USB port with deeply discharged cells – no start-up delay
• USB On-the-Go (OTG) power support (up to 500mA @ +5V)
• Reverse current blocking prevents Battery discharge
• High-efficiency step-down regulator with 3MHz switching
• +4.35 to +6.0V input voltage range
• +18V input tolerance (non-operating)
• High-accuracy float voltage regulation: 1.0%
• Digital programming of all major parameters via I2C interface
o Pre-charge voltage, float voltage
o Input/pre-charge/fast charge/term. current
o Battery temperature limits, safety timers
• Comprehensive protection features
o Status/fault indicator
o Battery/IC thermal protection
o Short circuit/UV/OV protection
o Charge termination safety timers
o Software watchdog timers
• Tiny CSP-30 package

INTRODUCTION
The SMB136 is a programmable single-cell lithium-ion/lithium-polymer Battery charger designed for a variety of portable applications. The device provides a simple and efficient way to charge high-capacity LiIon batteries via a USB or AC power source. Unlike conventional charging devices, the SMB136’s high-efficiency switch-mode operation eliminates the low charge current and thermal problems of conventional linear solutions. Also the switching architecture in conjunction with programmability enables dramatically faster charging – TurboCharge™ mode - from current limited in puts such as USB.

FEATURES & APPLICATIONS
• Automatic Input Current Limit for universal USB/AC/DC adapter compatibility*
• Optional automatic power source detection per latest USB charging specification 1.0
• USB input with programmable input current limiting (USB2.0 compliant)
• Up to 750mA charging output from 500mA USB port or 1500mA from AC adapter using proprietary “TurboChargeTM Mode”
• Input/output CurrentPath™ control allows system operation with deeply discharged/missing Battery – no start-up delay
• “Low Battery Recovery” mode for >500mA startup from 100mA USB port with deeply discharged cells – no start-up delay
• USB On-the-Go (OTG) power support (up to 500mA @ +5V)
• Reverse current blocking prevents Battery discharge
• High-efficiency step-down regulator with 3MHz switching
• +4.35 to +6.2V input voltage range
• +18V input tolerance (non-operating)
• High-accuracy float voltage regulation: 1.0%
• Digital programming of all major parameters via I2C interface
o Pre-charge voltage, float voltage
o Input/pre-charge/fast charge/term. current
o Battery temperature limits, safety timers
• Comprehensive protection features
o Status/fault indicator
o Battery/IC thermal protection
o Short circuit/UV/OV protection
o Charge termination safety timers
o Software watchdog timers
• Tiny CSP-30 package

Applications
• Portable Media Players
• Smartphones/PDA’s
• Digital camcorders/still cameras
• Handheld GPS

LITHIUM Battery PROTECTION CIRCUIT FOR ONE CELL SMART Battery PACKS

The MC33349 is a monolithic lithium Battery protection circuit that is designed to enhance the useful operating life of a one cell rechargeable Battery pack. Cell protection features consist of internally trimmed charge and discharge voltage limits, charge and discharge current limit detection, and a virtually zero current sleepmode state when the cell is discharged.

This protection circuit requires a minimum number of external components and is targeted for inclusion within the Battery pack. This MC33349 is available in the SOT–23 6 lead surface mount package.

•Internally Trimmed Charge and Discharge Voltage Limits
•Charge and Discharge Current Limit Detection
•Virtually Zero Current Sleepmode State when Cells are Discharged
•Dedicated for One Cell Applications
•Minimum Components for Inclusion within the Battery Pack
•Available in a Low Profile Surface Mount Package

INTRODUCTION
The SMB137C is a programmable single-cell lithiumion/lithium-polymer Battery charger designed for a variety of portable applications. Unlike conventional charging devices, the SMB137C’s high-efficiency switch-mode operation eliminates the low charge current and thermal problems of conventional linear solutions. In addition, the switching architecture in conjunction with programmability enables dramatically faster charging – TurboCharge™ mode - from current limited inputs such as USB.

FEATURES
• Automatic Input Current Limit for universal USB/AC/DC adapter compatibility*
• Optional automatic power source detection per latest USB charging specification 1.2
• USB or AC input with automatic input selection and programmable input current limiting (USB2.0 compliant)
• Up to 750mA charging output from 500mA USB port or 1500mA from AC adapter using proprietary “TurboChargeTM Mode”
• Input/output CurrentPath™ control allows system operation with deeply discharged/missing Battery – no start-up delay
• “Low Battery Recovery” mode for >500mA startup from 100mA USB port with deeply discharged cells – no start-up delay*
• USB OTG, HDMI, MHL power support (up to 500mA @ +5V)
• Hardware programmable support for JEITA
• High-efficiency step-down regulator with 3MHz switching
• +4.35 to +6.0V input voltage range
• +18V input tolerance (non-operating)
• High-accuracy float voltage regulation: 1.0%
• Digital programming of major parameters via I2C interface*
• Comprehensive protection features
• Tiny CSP-30 package

APPLICATIONS
• Smartphones
• Tablet PCs
• Portable Media Players
• Perfect Companion for MSM Chipsets