Ti Bq24765 Battery Power Charger Control Management Integrated Circuit IC Voltage Monitor Protector Electronic Components Chip

• shape: Flat
• Conductive Type: Bipolar Integrated Circuit
• Integration: MSI
• Technics: Semiconductor IC
• Application: Standard Generalized Integrated Circuit
• Type: Digital / Analog IC
• Rating: Catalog
• RoHS: Yes
• Reach: Yes
• Lead Finish / Ball Material: Nipdau / Snagcu
• Delivery Time: 1-3 Days
• Transport Package: Small Large T&R
• Specification: 9 mm² 3 x 3
• Trademark: TI
• HS Code: 8542399000
• Production Capacity: 60000

Product Description

Packaging information

Package | PinsVQFN (RUV) | 34

Operating temperature range (°C)-40 to 155

Package qty | Carrier250 | SMALL T&R

Features for the BQ24765

• Integrated Power MOSFETs, NMOS-NMOS,
  Synchronous Buck Converter
• >95% Efficiency
• Frequency 700kHz Allows Smaller Inductor (5 mm
  × 5 mm)
• Thermal Regulation Loop for Safety, Limit T_J =
  120°C
• Adaptive Driver Dead-time and 99.5% Maximum
  Effective Duty Cycle
• High-Accuracy Voltage and Current Regulation
  • ±0.5% Charge Voltage Accuracy
  • ±3% Charge Current Accuracy
  • ±3% Adapter Current Accuracy
  • ±2% Input Current Sense Amp Accuracy
• Integration
  • Integrated Power MOSFETs
  • Input Current Comparator
  • Internal Soft-Start
• Safety
  • Thermal Regulation Loop and Thermal
    Shutdown
  • Dynamic Power Management (DPM)
  • Power FETs Over Current Protection
• 7 V-24 V AC/DC-Adapter Operating Range
• Simplified SMBus Control
  • Charge Voltage DAC (1.024 V-19.2 V)
  • Charge Current DAC (128 mA-8.064 A)
  • Adapter Current Limit DPM DAC (256
    mA-11.008 A)
• Status and Monitoring Outputs
  • AC/DC Adapter Present With Adjustable
    Voltage Threshold
  • Input Current Comparator, With Adjustable
    Threshold and Hysteresis
  • Current Sense Amplifier for Current Drawn
    From Input Source
• Charge Any Battery Chemistry: Li+, LiFePO4,
  NiCd, NiMH, Lead Acid (2, 3, and 4 Li-Ion Cells)
• Charge Enable Pin (CE)
• Energy Star Low Iq
  • < 10-µA Battery Current with Adapter
    Removed
  • < 1 mA Input DCINA Current When Adapter
    Present and Charge Disabled
• 34-pin, 3.50 mm × 7.00 mm QFN Package
• APPLICATIONS
  • Notebook and Ultra-Mobile Computers
  • Portable Data-Capture Terminals
  • Portable Printers
  • Medical Diagnostics Equipment
  • Battery Bay Chargers
  • Battery Back-up Systems

All other trademarks are the property of their respective owners

Description for the BQ24765

The bq24765 is a high-efficiency, synchronous battery charger with two integrated 30-mΩ NMOS power MOSFETs, and an integrated input current comparator, offering low component count for space-constraint, multi-chemistry battery charging applications. Input current, charge current, and charge voltage DACs allow for very high regulation accuracies that can be easily programmed by the system power management micro-controller using SMBus. The bq24765 has switching frequency of 700 kHz. The bq24765 charges 2, 3, or 4 series Li+ cells, and is available in a 34-pin, 3.50 mm × 7.00 mm VQFN package.

The bq24765 features Dynamic Power Management (DPM) and input power limiting. These features reduce battery charge current when the input power limit is reached to avoid overloading the AC adaptor when supplying the load and the battery charger simultaneously. A high-accuracy current sense amplifier enables accurate measurement of input current from the AC adapter, allowing monitoring the overall system power. If the adapter current is above the programmed low-power threshold, a signal is sent to host so that the system optimizes its power performance according to what is available from the adapter. An integrated comparator allows monitoring the input current through the current sense amplifier, and indicating when the input current exceeds a programmable threshold limit. The bq24765 features a thermal regulation loop to reduce battery charge current when the T_j limit is reached. This feature protects internal power FETs from overheating when charging with high current.