SLUSCB6B May   2015  – June 2017

UNLESS OTHERWISE NOTED, this document contains PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
  6. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information
    5. 6.5 Electrical Characteristics
    6. 6.6 Timing Requirements
    7. 6.7 Typical Characteristics
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1  Battery Preconditioning
      2. 7.3.2  Battery Fast-Charge Constant Current
      3. 7.3.3  Charge-Current Monitor
      4. 7.3.4  Battery Fast-Charge Voltage Regulation
      5. 7.3.5  Charge Termination Detection and Recharge
      6. 7.3.6  Charge Status Outputs
      7. 7.3.7  PG Output (bq24080-Q1)
      8. 7.3.8  Charge-Enabled (CE) Input (bq24080-Q1)
      9. 7.3.9  Timer Enabled (TE) Input (bq24081-Q1)
      10. 7.3.10 Temperature Qualification (bq24081-Q1)
      11. 7.3.11 Timer Fault and Recovery
        1. 7.3.11.1 Condition Number 1
        2. 7.3.11.2 Condition Number 2
    4. 7.4 Device Functional Modes
      1. 7.4.1 Sleep Mode
  8. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
        1. 8.2.2.1 Calculations
        2. 8.2.2.2 Battery Temperature Sense (bq24081-Q1):
        3. 8.2.2.3 STAT Pins (All Devices) and PG Pin (bq24080-Q1):
        4. 8.2.2.4 Selecting Input and Output Capacitors
      3. 8.2.3 Application Curves
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
    3. 10.3 Thermal Considerations
  11. 11Device and Documentation Support
    1. 11.1 Device Support
    2. 11.2 Documentation Support
    3. 11.3 Related Links
    4. 11.4 Receiving Notification of Documentation Updates
    5. 11.5 Community Resources
    6. 11.6 Trademarks
    7. 11.7 Electrostatic Discharge Caution
    8. 11.8 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information

5 Pin Configuration and Functions

bq24080-Q1 DRC Package
10 Pin VSON
Top View
bq24080-Q1 bq24081-Q1 po_bq24080Q_sluscb6.gif
bq24081-Q1 DRC Package
10 Pin VSON
Top View
bq24080-Q1 bq24081-Q1 po_bq24081Q_sluscb6.gif

Pin Functions

PIN I/O DESCRIPTION
NAME NO.
bq24080-Q1 bq24081-Q1
CE 9 – I Charge enable input (active-low)
GND 2, 7 2, 7 – Ground
IN 1 1 I Adapter dc voltage. Connect minimum 0.1-μF capacitor to VSS.
ISET 6 6 I Charge current. External resistor to VSS sets precharge and fast-charge current, and also the termination current value. Can be used to monitor the charge current.
OUT 10 10 O Charge current output. Connect minimum 0.1-μF capacitor to VSS.
PG 8 – O Power-good status output (open-drain)
STAT1 3 3 O Charge status outputs (open-drain)
STAT2 4 4 O
TE – 8 I Timer-enable input (active-low)
TS – 9 I/O Temperature sense; connect to NTC in battery pack.
VSS 5 5 – Ground
Thermal pad – – – There is an internal electrical connection between the exposed thermal pad and the VSS pin of the device. The exposed thermal pad must be connected to the same potential as the VSS pin on the printed-circuit board. Do not use the thermal pad as the primary ground input for the device. The VSS pin must be connected to ground at all times.