SEPIC Constant-Current/Constant-Voltage Battery Charger Features: Charger Input Voltage May Be Higher, Equal to or Lower Than Battery Voltage Charges Any Number of Cells Up to 30V* 1% Voltage Accuracy for Rechargeable Lithium Batteries 500kHz Switching Frequency Minimizes Inductor Size 100mV Current Sense Voltage for High Efficiency Battery Can Be Directly Grounded Charging Current Easily Programmable or Shut Down*Maximum Input Voltage = 40V VBAT

SEPIC Constant- or Programmable-Current/Constant-Voltage Battery Charger Features: Charger Input Voltage May Be Higher, Equal to or Lower Than Battery Voltage Charges Any Number of Cells Up to 20V 1% Voltage Accuracy for Rechargeable Lithium Batteries 100mV Current Sense Voltage for High Efficiency (LT1513) 0mV Current Sense Voltage for Easy Current Programming (LT1513-2) Battery Can Be Directly Grounded 500kHz Switching Frequency Minimizes Inductor Size Charging Current Easily Programmable or Shut Down

Constant-Current/Constant-Voltage Battery Charger with Preset Voltage and Termination Flag Features: Fast Charging of Li-Ion, NiMH and NiCd Batteries Simple Charge Current Programming Requires Only One Low Cost, 1/32W Resistor High Efficiency Charger with Up to 1.5A Charge Current Precision 0.6% Internal Voltage Reference Preset Battery Voltages: 4.1V, 4.2V, 8.2V, 8.4V 500kHz or 200kHz Switching Frequency Minimizes Charger Size Low Reverse Battery Drain Current: 5µA Flag Indicates Li-Ion Charge Completion 5% Typical Charge Current Accuracy Low Shutdown Current LT1571-1: 200kHz, Adjustable Voltage LT1571-2: 200kHz, Fixed 8.2V or 8.4V LT1571-5: 500kHz, Fixed 4.1V or 4.2V

LASS 2/3 TRANSFORMER 115V to 8V, 50/60 Hz

12 Channel Multicell Battery Monitor Features: Measures up to 12 battery cells in series Maximum lifetime total measurement error: 1.5 mV Stackable architecture for high voltage battery packs Built-in isoSPI interface 2 Mb isolated serial communications Uses a single twisted pair, up to 20 meters Low EMI susceptibility and emissions Bidirectional for broken wire protection Capacitor or transformer coupled ADBMS6815WFS models designed for use in ISO 26262 applications for Automotive Safety Integrity Level Capability D (ASIL D) ADBMS6815M includes LPCM for Cell & Temperature Monitoring in Key-off State Hot plug tolerant without external protection Diagnostics for IC and application circuit failure modes 304 μs to measure all cells in a system 16-bit ADC with programmable noise filter Passive cell balancing up to 300 mA per channel with programmable PWM 7 GPIO or analog inputs Temperature or other sensor inputs Configurable as an I2C or SPI master Sleep state supply current: 5.5 μA 48-lead LQFP package with exposed pad AEC-Q100 qualified for automotive applications

Power Tracking 2A Battery Charger Features: Input Supply Voltage Regulation Loop for Peak Power Tracking in (MPPT) Solar Applications Wide Input Voltage Range: 4.95V to 34V (40V Abs Max) Programmable Charge Rate Up to 2A User Selectable Termination: C/10 or On-Board Termination Timer Resistor Programmable Float Voltage Up to 18V Accommodates 4-Cell Li-Ion/Polymer, 5-Cell LiFePO4, Lead-Acid Chemistries Parallelable for Higher Output Current 1MHz Fixed Frequency 0.5% Float Voltage Reference Accuracy 5% Charge Current Accuracy 2.5% C/10 Detection Accuracy Binary-Coded Open-Collector Status Pins Thermally Enhanced 3mm × 3mm DFN and MSE Packages

The LTC4097 is a standalone linear battery charger that is capable of charging a single-cell Li-Ion or Li-Polymer battery from both wall adapter and USB inputs. The charger can detect power at the inputs and automatically select the appropriate power source for charging.No external sense resistor or blocking diode is required for charging due to the internal MOSFET architecture. Internal thermal feedback regulates the battery charge current to maintain a constant die temperature during high power operation or high ambient temperature conditions. The float voltage is fixed at 4.2V and the charge current is programmed with an external resistor. The LTC4097 terminates the charge cycle when the charge current drops below the user programmed termination threshold after the final float voltage is reached. The LTC4097 can be put into shutdown mode reducing the DCIN supply current to 20µA, the USBIN supply current to 10µA, and the battery drain current to less than 2µA even with power applied to both inputs.Other features include trickle charge, automatic recharge, undervoltage lockout, charge status output, an NTC thermistor input used to monitor battery temperature and VNTC power present output with 120mA drive capability.Applications Cellular Telephones MP3 Players Portable Handheld Devices

The low-cost MAX1873R/S/T provides all functions needed to simply and efficiently charge 2-, 3-, or 4-series lithium-ion cells at up to 4A or more. It provides a regulated charging current and voltage with less than ±0.75% total voltage error at the battery terminals. An external P-channel MOSFET operates in a step-down DC-DC configuration to efficiently charge batteries in low-cost designs.The MAX1873R/S/T regulates the battery voltage and charging current using two control loops that work together to transition smoothly between voltage and current regulation. An additional control loop limits current drawn from the input source so that AC adapter size and cost can be minimized. An analog voltage output proportional to charging current is also supplied so that an ADC or microcontroller can monitor charging current.The MAX1873 may also be used as an efficient current-limited source to charge NiCd or NiMH batteries in multichemistry charger designs. The MAX1873R/S/T is available in a space-saving 16-pin QSOP package. Use the evaluation kit (MAX1873EVKIT) to help reduce design time.Applications2-, 3-, or 4-Cell Li+ Battery Pack Chargers6-, 9-, or 10-Cell Li+ Battery Pack ChargersDesktop Cradle ChargersHandheld Instruments (PDAs, Palmtops)Notebook ComputersPortable Desktop Assistants (PDAs)Portable Internet Tablets

The low-cost MAX1873R/S/T provides all functions needed to simply and efficiently charge 2-, 3-, or 4-series lithium-ion cells at up to 4A or more. It provides a regulated charging current and voltage with less than ±0.75% total voltage error at the battery terminals. An external P-channel MOSFET operates in a step-down DC-DC configuration to efficiently charge batteries in low-cost designs.The MAX1873R/S/T regulates the battery voltage and charging current using two control loops that work together to transition smoothly between voltage and current regulation. An additional control loop limits current drawn from the input source so that AC adapter size and cost can be minimized. An analog voltage output proportional to charging current is also supplied so that an ADC or microcontroller can monitor charging current.The MAX1873 may also be used as an efficient current-limited source to charge NiCd or NiMH batteries in multichemistry charger designs. The MAX1873R/S/T is available in a space-saving 16-pin QSOP package. Use the evaluation kit (MAX1873EVKIT) to help reduce design time.Applications2-, 3-, or 4-Cell Li+ Battery Pack Chargers6-, 9-, or 10-Cell Li+ Battery Pack ChargersDesktop Cradle ChargersHandheld Instruments (PDAs, Palmtops)Notebook ComputersPortable Desktop Assistants (PDAs)Portable Internet Tablets

The MAX1925/MAX1926 single-cell lithium-ion (Li+) switch-mode battery chargers use an external PMOS pass element step-down configuration. Charge current is programmable, and an external capacitor sets the maximum charge time.Additional features include automatic input power detection (active-low ACON output), logic-controlled enable, and temperature monitoring with an external thermistor. The MAX1925 disables charging for inputs greater than 6.1V, while the MAX1926 charges for inputs between 4.25V and 12V.The MAX1925/MAX1926 feature two precondition levels to restore near-dead cells. The devices source 4mA to a cell that is below 2V while sourcing C/10 to a cell between 2V and 3V. Full charge current is then applied above 3V. A active-low CHG output drives an LED to indicate charging (LED on) and fault conditions (LED blinking).The MAX1925/MAX1926 are available in a 12-pin 4mm x 4mm thin QFN package and are specified over the extended temperature range (-40°C to +85°C). An evaluation kit is available to speed design.ApplicationsCradle ChargersDigital Still CamerasPDAsSelf-Charging Battery Packs