SLUS784E December   2007  – December 2015

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Device Options
  6. 6 Pin Configuration and Functions
  7. 7  Specifications
    1. 7.1 Absolute Maximum Ratings
    2. 7.2 ESD Ratings
    3. 7.3 Recommended Operating Conditions
    4. 7.4 Thermal Information
    5. 7.5 Electrical Characteristics
    6. 7.6 Timing Requirements
    7. 7.7 Dissipation Ratings
    8. 7.8 Typical Characteristics
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1  Control Logic Overview
      2. 8.3.2  Temperature Qualification (Applies Only to Versions With TS Pin Option)
      3. 8.3.3  Input Overvoltage Detection, Power Good Status Output
      4. 8.3.4  Charge Status Outputs
      5. 8.3.5  Battery Charging: Constant Current Phase
      6. 8.3.6  Charge Current Translator
      7. 8.3.7  Battery Voltage Regulation
      8. 8.3.8  Pre-Charge Timer
      9. 8.3.9  Thermal Protection Loop
      10. 8.3.10 Thermal Shutdown And Protection
      11. 8.3.11 Dynamic Timer Function
      12. 8.3.12 Charge Termination Detection and Recharge
      13. 8.3.13 Battery Absent Detection - Voltage Mode Algorithm
      14. 8.3.14 Charge Safety Timer
      15. 8.3.15 Short-Circuit Protection
      16. 8.3.16 Startup With Deeply Depleted Battery Connected
    4. 8.4 Device Functional Modes
      1. 8.4.1 Power Down
      2. 8.4.2 Sleep Mode
      3. 8.4.3 Overvoltage Lockout
      4. 8.4.4 Stand-By Mode
      5. 8.4.5 Begin Charge Mode
      6. 8.4.6 Charging Mode
      7. 8.4.7 Suspend Mode
      8. 8.4.8 LDO Mode Operation
      9. 8.4.9 State Machine Diagram
  9. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Applications
      1. 9.2.1 bq24086 and bq24088 Typical Application
        1. 9.2.1.1 Design Requirements
        2. 9.2.1.2 Detailed Design Procedure
          1. 9.2.1.2.1 Selecting Input and Output Capacitor
          2. 9.2.1.2.2 Using Adapters With Large Output Voltage Ripple
          3. 9.2.1.2.3 Calculations
        3. 9.2.1.3 Application Curves
      2. 9.2.2 bq24085 Typical Application
        1. 9.2.2.1 Design Requirements
      3. 9.2.3 bq24087 Typical Application
        1. 9.2.3.1 Design Requirements
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
    3. 11.3 Thermal Considerations
  12. 12Device and Documentation Support
    1. 12.1 Documentation Support
      1. 12.1.1 Related Documentation
    2. 12.2 Related Links
    3. 12.3 Community Resources
    4. 12.4 Trademarks
    5. 12.5 Electrostatic Discharge Caution
    6. 12.6 Glossary
  13. 13Mechanical, Packaging, and Orderable Information

Package Options

Refer to the PDF data sheet for device specific package drawings

Mechanical Data (Package|Pins)
  • DRC|10
Thermal pad, mechanical data (Package|Pins)
Orderable Information

6 Pin Configuration and Functions

bq24086 and bq24088 DRC Package
10-Pin VSON
Top View
bq24085 bq24086 bq24087 bq24088 pin_assg_01_lus784.gif
bq24085 DRC Package
10-Pin VSON
Top View
bq24085 bq24086 bq24087 bq24088 pin_assg_02_lus784.gif
bq24087 DRC Package
10-Pin VSON
Top View
bq24085 bq24086 bq24087 bq24088 pin_assg_03_lus784.gif

Pin Functions

PIN I/O DESCRIPTION
NAME bq24086/8 bq24085 bq24087
BAT 9 9 9 I Battery voltage sense input. Connect to the battery positive terminal. Connect a 390-Ω resistor from BAT to OUT for I(OUT) < 200 mA.
CE – 8 7 I Charge enable input. CE = LO enables charger. CE = HI disables charger.
IN 1 1 1 I Charge input voltage and internal supply. Connect a 1-μF (minimum) capacitor from IN to VSS. CIN ≥ COUT
ISET 6 6 6 O Charge current set point, resistor connected from ISET to VSS sets charge current value. Connect a 0.1-μF capacitor from BAT to ISET for I(OUT) < 200 mA.
OUT 10 10 10 O Charge current output. Connect to the battery positive terminal. Connect a 1-μF (minimum) capacitor from OUT to VSS.
PG 7 7 O Power good status output (open-collector), active low.
STAT1 3 3 3 O Charge status output 1 (open-collector, see Table 3).
STAT2 4 4 4 O Charge status output 2 (open-collector, see Table 3).
TE – – 8 I Termination enable input. TE = LO enables termination detection and battery absent detection. TE = HI disables termination detection and battery absent detection.
TMR 2 2 2 I Safety timer program input, timer disabled if floating. Connect a resistor to VSS pin to program safety timer timeout value.
TS 8 – – I Temperature sense input, connect to battery pack thermistor. Connect an external resistive divider to program temperature thresholds.
VSS 5 5 5 I Ground
Exposed Thermal Pad Pad Pad Pad – There is an internal electrical connection between the exposed thermal pad and Vss pin of the IC. 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 IC. VSS pin must be connected to ground at all times.