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BQ24170 Даташит - Texas Instruments

Номер в каталогеОписание (Функция)производитель
BQ24170 1.6-MHz Synchronous Switched-Mode Li-Ion and Li-Polymer Stand-Alone Battery Charger With Integrated MOSFETs and Power Path Selector TI
Texas Instruments TI
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BQ24170 Datasheet PDF : BQ24170 pdf   
BQ24170RGYR image

Description
The bq2417x device is a highly integrated stand-alone Li-Ion and Li-Polymer switched-mode battery charger with two integrated N-channel power MOSFETs. The device offers a constant-frequency synchronous PWM controller with high-accuracy regulation of input current, charge current, and voltage. The bq2417x closely monitors the battery pack temperature to allow charge only in a preset temperature window. The bq24170 charges one, two, or three cells (selected by CELL pin), and the bq24172 is adjustable for up to three series Li+ cells.

Features
• 1.6-MHz Synchronous Switched-Mode Charger
   with 4-A Integrated N-MOSFETs
• Up to 94% Efficiency
• 30-V Input Rating with Adjustable Overvoltage
   Protection
   – 4.5-V to 17-V Input Operating Voltage Range
• Battery Charge Voltage
   – bq24170: 1-, 2-, or 3-Cell with 4.2 V/Cell
   – bq24172: Adjustable Charge Voltage
• High Integration
   – Automatic Power Path Selector Between
      Adapter and Battery
   – Dynamic Power Management
   – Integrated 20-V Switching MOSFETs
   – Integrated Bootstrap Diode
   – Internal Digital Soft Start
• Safety
   – Thermal Regulation Loop Throttles Back
      Current to Limit TJ = 120°C
   – Thermal Shutdown
   – Battery Thermistor Sense Hot/Cold Charge
Suspend and Battery Detect
   – Adjustable Input Overvoltage Protection
   – Cycle-by-Cycle Current Limit
• Accuracy
   – ±0.5% Charge Voltage Regulation
   – ±4% Charge Current Regulation
   – ±4% Input Current Regulation
• <15-μA Battery Current With Adapter Removed
• <1.5-mA Input Current With Adapter Present and
   Charge Disabled

Applications
• Tablet PCs
• Portable Data Capture Terminals
• Portable Printers
• Medical Diagnostics Equipment
• Battery Bay Chargers
• Battery Backup Systems

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