LTC4100
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LTC4100

Smart Battery Charger Controller

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Part Details
Part Models 2
1ku List Price Starting From $6.60
Features
  • Single Chip Smart Battery Charger Controller
  • 100% Compliant (Rev. 1.1) SMBus Support Allows for Operation with or without Host
  • SMBus Accelerator Improves SMBus Timing
  • Wide Output Voltage Range: 3.5V to 26V
  • Hardware Interrupt and SMBAlert Response Eliminate Interrupt Polling
  • High Efficiency Synchronous Buck Charger
  • 0.5V Dropout Voltage; Maximum Duty Cycle > 98%
  • AC Adapter Current Limit Maximizes Charge Rate
  • ±0.8% Voltage Accuracy; ±4% Current Accuracy
  • Up to 4A Charging Current Capability
  • 10-Bit DAC for Charge Current Programming
  • 11-Bit DAC for Charger Voltage Programming
  • User-Selectable Overvoltage and Overcurrent Limits
  • High Noise Immunity SafetySignal Sensor
  • Available in a 24-Pin SSOP Package
Additional Details
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The LTC4100 Smart Battery Charger is a single chip charging solution that dramatically simplifies construction of an SBS compliant system. The LTC4100 implements a Level 2 charger function whereby the charger can be programmed by the battery or by the host. A SafetySignal on the battery being charged is monitored for temperature, connectivity and battery type information. The SMBus interface remains alive when the AC power adapter is removed and responds to all SMBus activity directed to it, including SafetySignal status (via the ChargerStatus command). The charger also provides an interrupt to the host whenever a status change is detected (e.g., battery removal, AC adapter connection).

Charging current and voltage are restricted to chemistry specific limits for improved system safety and reliability. Limits are programmable by two external resistors. Additionally, the maximum average current from the AC adapter is programmable to avoid overloading the adapter when simultaneously supplying load current and charging current. When supplying system load current, charging current is automatically reduced to prevent adapter overload.

Applications

  • Portable Instruments and Computers
  • Data Storage Systems and Battery Backup Servers
Part Models 2
1ku List Price Starting From $6.60

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Documentation

Documentation

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
LTC4100EG#PBF
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Product Lifecycle

PCN

Aug 6, 2022

- 22_0171

Laser Top Mark Conversion for SSOP Packages Assembled in PNG

LTC4100EG#PBF

PRODUCTION

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Laser Top Mark Conversion for SSOP Packages Assembled in PNG

LTC4100EG#PBF

PRODUCTION

LTC4100EG#TRPBF

PRODUCTION

Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 1

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DC512B

LTC4100EG | 3-/4-Cell Li-Ion Smart Battery Charger, DCIN = 15V to 20V, up to 4A Charge Current, (Requires DC1223)

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DC512B

LTC4100EG | 3-/4-Cell Li-Ion Smart Battery Charger, DCIN = 15V to 20V, up to 4A Charge Current, (Requires DC1223)

LTC4100EG | 3-/4-Cell Li-Ion Smart Battery Charger, DCIN = 15V to 20V, up to 4A Charge Current, (Requires DC1223)

Product Detail

Demonstration circuit DC512B is a single battery switching step-down charge controller featuring the LTC4100. The recommended input power is 15 to 20V at 3.5A. A two-position jumper allows choice of protected output voltage range suitable for 3- and 4-Cell Li-ion batteries. Removal of the jumper allows full output voltage range. The maximum charge current is 4A.


The demo board is initially configured for 12.6V at 3A for popular 3-cell Li-ion battery packs. LTC4100 will automatically charge a Smart Battery to termination as soon as input power is applied with a battery connected prior to power up. A VOUT pin automatically provides power to the system load from the wall adapter or battery. Status LEDs are provided for CHG, ACP, SMBALERT and SMBus activity.

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