JAJSL08H september   2009  – february 2021 BQ24040 , BQ24041 , BQ24045

PRODUCTION DATA  

  1.   1
  2. 1 特長
  3. 2 アプリケーション
  4. 3 概要
  5. 4 Revision History
  6. 5 Device Comparison
  7. 6 Pin Configuration and Functions
  8. 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 Typical Operational Characteristics (Protection Circuits Waveforms)
  9. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 Power-Down or Undervoltage Lockout (UVLO)
      2. 8.3.2 Power-up
      3. 8.3.3 Sleep Mode
      4. 8.3.4 New Charge Cycle
      5. 8.3.5 Overvoltage-Protection (OVP) – Continuously Monitored
      6. 8.3.6 Power Good Indication ( PG)
      7. 8.3.7 CHG Terminal Indication
    4. 8.4 Device Functional Modes
      1. 8.4.1  CHG and PG LED Pull-up Source
      2. 8.4.2  Auto Start-up (BQ24041)
      3. 8.4.3  IN-DPM (VIN-DPM or IN-DPM)
      4. 8.4.4  OUT
      5. 8.4.5  ISET
      6. 8.4.6  PRE_TERM – Pre-Charge and Termination Programmable Threshold, BQ24040/5
      7. 8.4.7  ISET2
      8. 8.4.8  TS (BQ24040/5)
      9. 8.4.9  Termination and Timer Disable Mode (TTDM) - TS Terminal High
      10. 8.4.10 Timers, BQ24040 and BQ24045 only
      11. 8.4.11 Termination
      12. 8.4.12 Battery Detect Routine
      13. 8.4.13 Refresh Threshold
      14. 8.4.14 Starting a Charge on a Full Battery
  10. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Applications
      1. 9.2.1 Typical Application: BQ24040 and BQ24045
        1. 9.2.1.1 Design Requirements
        2. 9.2.1.2 Detailed Design Procedure
          1. 9.2.1.2.1 Calculations
            1. 9.2.1.2.1.1 Program the Fast Charge Current, ISET:
            2. 9.2.1.2.1.2 Program the Termination Current Threshold, ITERM:
            3. 9.2.1.2.1.3 TS Function (BQ24040)
            4. 9.2.1.2.1.4 CHG and PG
          2. 9.2.1.2.2 Selecting In and Out Terminal Capacitors
        3. 9.2.1.3 Application Curves
      2. 9.2.2 Typical Application Circuit: BQ24041, with ASI and ASO
        1. 9.2.2.1 Design Requirements
        2. 9.2.2.2 Detailed Design Procedure
        3. 9.2.2.3 Application Curves
  11. 10Power Supply Recommendations
  12. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
    3. 11.3 Thermal Considerations
      1. 11.3.1 Leakage Current Effects on Battery Capacity
  13. 12Device and Documentation Support
    1. 12.1 Device Support
      1. 12.1.1 サード・パーティ製品に関する免責事項
    2. 12.2 Documentation Support
      1. 12.2.1 Related Documentation
    3. 12.3 ドキュメントの更新通知を受け取る方法
    4. 12.4 サポート・リソース
    5. 12.5 Trademarks
    6. 12.6 静電気放電に関する注意事項
    7. 12.7 用語集
  14. 13Mechanical, Packaging, and Orderable Information

6 Pin Configuration and Functions

GUID-34643089-26CE-46A5-B174-E18562FC890B-low.svgFigure 6-1 BQ24040 and BQ24045 DSQ Package 10-Pin WSONTop View
GUID-4C90F212-7FF0-4557-87C8-1785F4321FCE-low.svgFigure 6-2 BQ24041 DSQ Package 10-Pin WSONTop View
Table 6-1 Pin Functions
PIN I/O DESCRIPTION
NAME BQ24040
BQ24045		 BQ24041
IN 1 1 I Input power, connected to external DC supply (AC adapter or USB port). Expected range of bypass capacitors 1μF to 10μF, connect from IN to VSS.
OUT 10 10 O Battery Connection. System Load may be connected. Expected range of bypass capacitors 1μF to 10μF.
PRE-TERM 4 – I Programs the Current Termination Threshold (5 to 50% of Iout which is set by ISET) and Sets the Pre-Charge Current to twice the Termination Current Level.
Expected range of programming resistor is 1k to 10kΩ (2k: Ipgm/10 for term; Ipgm/5 for precharge)
ISET 2 2 I Programs the Fast-charge current setting. External resistor from ISET to VSS defines fast charge current value. Range is 10.8k (50mA) to 540Ω (1000mA).
ISET2 7 7 I Programming the Input/Output Current Limit for the USB or Adaptor source:
BQ24040/5 => High = 500mAmax, Low = ISET, FLOAT = 100mAmax.
BQ24041 => High = 410mAmax, Low = ISET, FLOAT = 100mAmax.
TS 9(1) – I Temperature sense terminal connected to BQ24040/5 -10k at 25°C NTC thermistor, in the battery pack. Floating T terminal or pulling High puts part in TTDM “Charger” Mode and disable TS monitoring, Timers and Termination. Pulling terminal Low disables the IC. If NTC sensing is not needed, connect this terminal to VSS through an external 10 kΩ resistor. A 250kΩ from TS to ground will prevent IC entering TTDM mode when battery with thermistor is removed.
BAT_EN – 9 I Charge Enable Input (active low)
VSS 3 3 – Ground terminal
CHG 8 8 O Low (FET on) indicates charging and Open Drain (FET off) indicates no Charging or Charge complete.
PG 5 5 O Low (FET on) indicates the input voltage is above UVLO and the OUT (battery) voltage.
ASI – 4 I Auto start External input. Internal 200kΩ pull-down.
ASO – 6 O Auto Start Logic Output
NC 6 – NA Do not make a connection to this terminal (for internal use) – Do not route through this terminal
Thermal Pad and Package Pad
2x2mm2		 Pad
2x2mm2		 – Connect exposed thermal pad to VSS terminal of the device and main ground plane. The thermal pad must be connected to the same potential as the VSS terminal on the printed circuit board. Do not use the thermal pad as the primary ground input for the device. VSS terminal must be connected to ground at all times.
(1) Spins have different terminal definitions