SLUSBJ3F August   2013  – March 2019

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
    1.     Device Images
      1.      Simplified Schematic
      2.      Charger Efficiency
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
    1.     Pin 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 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 Maximum Power Point Tracking
      2. 7.3.2 Battery Undervoltage Protection
      3. 7.3.3 Battery Overvoltage Protection
      4. 7.3.4 Battery Voltage in Operating Range (VBAT_OK Output)
      5. 7.3.5 Push-Pull Multiplexer Drivers
      6. 7.3.6 Nano-Power Management and Efficiency
    4. 7.4 Device Functional Modes
      1. 7.4.1 Main Boost Charger Disabled (Ship Mode) - (VSTOR > VSTOR_CHGEN and EN = HIGH)
      2. 7.4.2 Cold-Start Operation (VSTOR < VSTOR_CHGEN, VIN_DC > VIN(CS) and PIN > PIN(CS))
      3. 7.4.3 Main Boost Charger Enabled (VSTOR > VSTOR_CHGEN, VIN_DC > VIN(DC) and EN = LOW )
      4. 7.4.4 Thermal Shutdown
  8. 8 Application and Implementation
    1. 8.1 Application Information
      1. 8.1.1 Energy Harvester Selection
      2. 8.1.2 Storage Element Selection
      3. 8.1.3 Inductor Selection
      4. 8.1.4 Capacitor Selection
        1. 8.1.4.1 VREF_SAMP Capacitance
        2. 8.1.4.2 VIN_DC Capacitance
        3. 8.1.4.3 VSTOR Capacitance
        4. 8.1.4.4 Additional Capacitance on VSTOR or VBAT_SEC
    2. 8.2 Typical Applications
      1. 8.2.1 Solar Application Circuit
        1. 8.2.1.1 Design Requirements
        2. 8.2.1.2 Detailed Design Procedure
        3. 8.2.1.3 Application Performance Plots
      2. 8.2.2 TEG Application Circuit
      3. 8.2.3 Design Requirements
        1. 8.2.3.1 Detailed Design Procedure
        2. 8.2.3.2 Application Performance Plots
      4. 8.2.4 Piezoelectric Application Circuit
        1. 8.2.4.1 Design Requirements
        2. 8.2.4.2 Detailed Design Procedure
        3. 8.2.4.3 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
      1. 11.1.1 Third-Party Products Disclaimer
      2. 11.1.2 Zip Files
    2. 11.2 Documentation Support
      1. 11.2.1 Related Documentation
    3. 11.3 Receiving Notification of Documentation Updates
    4. 11.4 Community Resources
    5. 11.5 Trademarks
    6. 11.6 Electrostatic Discharge Caution
    7. 11.7 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

Package Options

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

6.6 Typical Characteristics

Unless otherwise noted, graphs were taken using Figure 28 with CIN = 4.7 µF, L1 = Coilcraft 22 µH LPS4018,
CSTOR = 4.7 µF, VBAT_OV = 5 V

Table 1. Table of Graphs

FIGURE
Charger Efficiency (η)(1) vs. Input Voltage IN= 10 µA Figure 1
IN= 100 µA Figure 2
IIN = 10 mA Figure 3
vs. Input Current VIN = 2.0 V Figure 4
VIN = 1.0 V Figure 5
VIN = 0.5 V Figure 6
VIN = 0.2 V Figure 7
VBAT_SEC Quiescent Current vs. VBAT_SEC Voltage EN = VBAT_SEC (Active Mode) Figure 8
EN = GND (Ship Mode) Figure 9
VBAT_PRI Leakage Current vs. VBAT_PRI Voltage EN = VBAT_SEC (Ship Mode) Figure 10
(1) See SLUA691 for an explanation on how to take these measurements. Because the MPPT feature cannot be disabled on the bq25505, these measurements need to be taken in the middle of the 16 s sampling period.
bq25505 C001_SLUSBH2.png
VIN_DC = Keithley Source Meter configured with ICOMP = 10 µA and outputing 0 to 3.0 V
VSTOR = Keithley Sourcemeter configured to measure current andvoltage source set to hold the VSTOR voltage = 2.0 V or 3.0 V
Figure 1. Charger Efficiency vs Input Voltage
bq25505 C003_SLUSBH2.png
VIN_DC = Keithley Source Meter configured with ICOMP = 10 mA and voltage source varied from 0.1 V to 3.0 V
VSTOR = Keithley Sourcemeter configured to measure current and voltage source set to hold the VSTOR voltage = 2.0 V, 3.0 V or 5.5 V
Figure 3. Charger Efficiency vs Input Voltage
bq25505 C002_SLUSBH2.png
VIN_DC = Keithley Source Meter configured with ICOMP = 100 µA and voltage source varied from 0.1 V to 3.0 V s
VSTOR = Keithley Sourcemeter configured to measure current and voltage source set to hold the VSTOR voltage = 2.0 V, 3.0 V or 5.5 V
Figure 2. Charger Efficiency vs Input Voltage
bq25505 C004_SLUSBH2.png
VIN_DC = Keithley Source Meter configured with voltage source = 2.0 V and ICOMP varied from 0.01 mA to 100 mA
VSTOR = Keithley Sourcemeter configured to measure current and voltage source set to hold the VSTOR voltage = 2.2 V , 3.0 V or 5.5 V
Figure 4. Charger Efficiency vs Input Current
bq25505 C005_SLUSBH2.png
VIN_DC = Keithley Source Meter configured with voltage source = 1.0 V and ICOMP varied from 0.01 mA to 100 mA
VSTOR = Keithley Sourcemeter configured to measure current and voltage source set to hold the VSTOR voltage = 2.0 V, 3.0 V or 5.5 V
Figure 5. Charger Efficiency vs Input Current
bq25505 C007_SLUSBH2.png
VIN_DC = Keithley Source Meter configured with voltage source = 0.2 V and ICOMP varied from 0.01 mA to 100 mA
VSTOR = Keithley Sourcemeter configured to measure current and voltage source set to hold the VSTOR voltage = 2.0 V, 3.0 V or 5.5 V
Figure 7. Charger Efficiency vs Input Current
bq25505 C002_SLUSBJ3.png
VIN_DC = floating and EN = VBAT_SEC
VBAT_SEC = Keithley Sourcemeter configured to measure current and voltage source varied from 2.0 V or 5.5 V
VBAT_PRI = voltage source as indicated
Figure 9. Quiescent Current vs VBAT_SEC Voltage: Ship Mode
bq25505 C006_slusbh2.png
VIN_DC = Keithley Source Meter configured with voltage source = 0.5 V and ICOMP varied from 0.01 mA to 100 mA
VSTOR = Keithley Sourcemeter configured to measure current and voltage source set to hold the VSTOR voltage = 1.8 V, 3.0 V or 5.5 V
Figure 6. Charger Efficiency vs Input Current
bq25505 C001_SLUSBJ3.png
VIN_DC = floating and EN = GND
VBAT_SEC = Keithley Sourcemeter configured to measure current and voltage source varied from 2.0 V or 5.5 V
VBAT_PRI = voltage source as indicated
Figure 8. Quiescent Current vs VBAT_SEC Voltage: Main Boost Charger Enabled but not Switching Mode
bq25505 C003_SLUSBJ3.png
VIN_DC = floating and EN = VBAT_SEC or GND
VBAT_PRI = Keithley Sourcemeter configured to measure current and voltage source varied from 2.0 V or 5.5 V
VBAT_SEC = voltage source as indicated
Figure 10. VBAT_PRI Leakage Current vs VBAT_PRI Voltage