SLUSFR2 November   2024 BQ21088

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Description (continued)
  6. 5 Pin Configuration and Functions
  7. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 Thermal Information
    4. 6.4 Recommended Operating Conditions
    5. 6.5 Electrical Characteristics
    6. 6.6 Timing Requirements
    7. 6.7 Typical Characteristics
  8. 7 Detailed Description
    1. 7.1 Overview
      1. 7.1.1 Battery Charging Process
        1. 7.1.1.1 Trickle Charge
        2. 7.1.1.2 Pre-Charge
        3. 7.1.1.3 Fast Charge
        4. 7.1.1.4 Termination
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1  Input Voltage Based Dynamic Power Management (VINDPM)
      2. 7.3.2  Dynamic Power Path Management Mode (DPPM)
      3. 7.3.3  Battery Supplement Mode
      4. 7.3.4  Sleep Mode
      5. 7.3.5  SYS Power Control (SYS_MODE bit control)
        1. 7.3.5.1 SYS Pulldown Control
      6. 7.3.6  SYS Regulation
      7. 7.3.7  ILIM Control
      8. 7.3.8  Protection Mechanisms
        1. 7.3.8.1 Input Overvoltage Protection
        2. 7.3.8.2 Battery Undervoltage Lockout
        3. 7.3.8.3 Battery Overcurrent Protection
        4. 7.3.8.4 System Overvoltage Protection
        5. 7.3.8.5 System Short Protection
        6. 7.3.8.6 Thermal Protection and Thermal Regulation
        7. 7.3.8.7 Safety Timer and Watchdog Timer
      9. 7.3.9  Pushbutton Wake and Reset Input
        1. 7.3.9.1 Pushbutton Wake or Short Button Press Functions
        2. 7.3.9.2 Pushbutton Reset or Long Button Press Functions
      10. 7.3.10 15-Second Timeout for HW Reset
      11. 7.3.11 Hardware Reset
      12. 7.3.12 Software Reset
      13. 7.3.13 Interrupt Indicator (/INT) Pin
      14. 7.3.14 External NTC Monitoring (TS)
        1. 7.3.14.1 TS Biasing and Function
      15. 7.3.15 I2C Interface
        1. 7.3.15.1 F/S Mode Protocol
    4. 7.4 Device Functional Modes
    5. 7.5 Register Maps
      1. 7.5.1 I2C Registers
  9. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Application
      2. 8.2.2 Design Requirements
      3. 8.2.3 Detailed Design Procedure
      4. 8.2.4 Application Curves
  10. 9 Power Supply Recommendations
  11. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
  12. 11Device and Documentation Support
    1. 11.1 Device Support
      1. 11.1.1 Third-Party Products Disclaimer
    2. 11.2 Documentation Support
      1. 11.2.1 Related Documentation
    3. 11.3 Receiving Notification of Documentation Updates
    4. 11.4 Support Resources
    5. 11.5 Trademarks
    6. 11.6 Electrostatic Discharge Caution
    7. 11.7 Glossary
  13. 12Revision History
  14. 13Mechanical, Packaging, and Orderable Information

Package Options

Refer to the PDF data sheet for device specific package drawings

Mechanical Data (Package|Pins)
  • YBG|8
Thermal pad, mechanical data (Package|Pins)
Orderable Information

6.5 Electrical Characteristics

VIN = 5V, VBAT = 3.6V. TJ = 25°C unless otherwise noted.
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
INPUT CURRENTS
IQ_IN Input supply quiescent current VBAT = 3.6V, VIN = 5V, Charge enabled, ICHG = 0mA, SYSREG = 4.5V 0.75 1 mA
IQ_IN Input supply quiescent current VBAT = 3.6V, VIN = 5V, Charge enabled, ICHG = 0mA, SYSREG = Passthrough 0.660 1.5 mA
ISLEEP_IN SLEEP input current VIN = 3.6V, VBAT = 3.7V 30 µA
IQ_BAT Battery quiescent current VIN <VUVLO or floating, Watchdog disabled, Push button disabled, I2C functional. VBAT =3.6V TJ = 25°C 3 3.5 µA
IQ_BAT Battery quiescent current VIN <VUVLO , VBAT =3.6V, Push-button function enabled, 0°C < TJ < 85°C 4 5 µA
IBAT_SHUTDOWN Battery discharge current in Shutdown Mode VIN = 0V, Shutdown Mode, VBAT = 3.6V, Adapter Sense wake enabled.  30 nA
IBAT_SHIP Battery discharge current in Ship Mode VBAT = 3.6V, Push button function enabled (average current), 0°C < TJ < 85°C 3.2 5 µA
POWER-PATH MANAGEMENT AND INPUT
VIN_OP Input voltage operating range 3.6 5.5 V
VIN_UVLOZ Exit IN undervoltage lock-out IN rising 3 V
VIN_UVLO Enter IN undervoltage lock-out IN falling 2.7 V
VIN_LOWV IN voltage to start charging IN rising 3 3.15 V
VIN_LOWVZ IN voltage to stop charging IN falling 2.95 3.1 V
VIN_PORZ IN voltage threshold to enter shipmode IN falling 1.09 1.3 1.66 V
VSLEEP Enter sleep mode threshold IN falling, VIN - VBAT, VBAT = 4V 82 mV
VSLEEPZ Exit sleep mode threshold IN rising, VIN - VBAT, VBAT = 4V 168 208 262 mV
VIN_OVP VIN overvoltage rising threshold IN rising 5.5 5.7 5.9 V
VIN_OVP_HYS IN overvoltage hysteresis IN falling 125 mV
IBAT_OCP BATOCP(Reverse OCP only) VBAT = 4V, IBAT_OCP= 00 0.5 A
VBAT = 4V, IBAT_OCP= 01 1.05 A
VBAT = 4V, IBAT_OCP= 10 1.65 A
VBAT = 4V, IBAT_OCP= 11 3 A
IBAT_OCPACC Battery OCP Accuracy IBAT= 3 A, TJ = 27C 18 %
VBSUP1 Enter supplement mode threshold VBAT = 3.6V, VBAT > VBUVLO, VSYS< VBAT-VBSUP1 40 mV
VBSUP2
 Exit supplement mode threshold VBAT > VBUVLO, VSYS>VBAT-VBSUP2 20 mV
ILIM
 Input Current Limit VIN = 5V, ILIM =50mA 40 50 60 mA
VIN = 5V, ILIM =100mA 80 90 98 mA
VIN = 5V, ILIM= 200mA 180 200 220 mA
VIN = 5V, ILIM= 300mA 270 300 330 mA
VIN = 5V, ILIM= 380mA 360 380 400 mA
VIN = 5V, ILIM= 500mA 450 475 498 mA
VIN = 5V, ILIM =665mA 630 665 700 mA
VIN = 5V, ILIM= 1050mA 995 1050 1100 mA
VINDPM_ACC VINDPM accuracy VINDPM target is not disabled -3 3 %
VINDPM Input voltage threshold when input current is reduced VINDPM target = VBAT + VINDPM_TRACK VBAT + VINDPM_TRACK V
Input voltage threshold when input current is reduced VINDPM target =4.5V 4.5 V
Input voltage threshold when input current is reduced VINDPM target =4.7V 4.7 V
VINDPM_TRACK Input voltage threshold offset for when input current is reduced and when VBAT > 3.5 V VINDPM taget = VBAT + VINDPM_TRACK 330 mV
VDPPM SYS voltage threshold when charge current is reduced VBAT = 3.6V, VSYS = VDPPM + VBAT before charge current is reduced.  0.1 V
VSYS_REG_ACCURACY Programmable SYS voltage regulation accuracy VIN = 5V, VBAT = 3.6V, RSYS = 100ohm, SYS regulation target = 4.4V to 4.9V -2 2 %
VMINSYS Minimum SYS voltage when in battery tracking mode VBAT < 3.6V 3.8 V
VSYS_TRACK Voltage regulation threshold for SYS when VBAT >3.6V in battery tracking mode VBAT = 4V, VSYS = VBAT + VSYS_TRACK 225 mV
RSYS_PD SYS pull down resistance VSYS = 3.6V 20 Ω
VSYS_SHORT Voltage threshold for detecting SYS_SHORT condition has occured falling voltage 0.86 V
VSYS_SHORT_HYS Voltage threshold for exiting SYS_SHORT condition has occured rising voltage 1.1 V
BATTERY CHARGER
RON_BAT Battery FET on-resistance VBAT = 4.5V, IBAT =500mA 55 90 mΩ
RON_IN Input FET on-resistance IN = 5V, IIN = 0.8A 330 470 mΩ
VREG_RANGE Typical BAT charge voltage regulation range 10mV steps, programmabe through I2C 3.5 4.65 V
VREG_ACC BAT charge voltage accuracy, summary for all settings All VBATREG settings, typical measurement at VBATREG = 4.2V –0.5 0.5 %
ICHG_RANGE Typical charge current regulation range VBAT > VLOWV 5 1000 mA
ICHG_ACC Charge current accuracy VIN = 5V, Fastcharge >=40mA –10 10 %
ICHG_ACC Charge current accuracy  Fastcharge current = 5mA 4.1 5 5.5 mA
ICHG_ACC Charge current accuracy  Fastcharge current = 40mA 36 40 44 mA
ICHG_ACC Charge current accuracy  Fastcharge current = 630mA 567 630 693 mA
IPRECHG Typical pre-charge current, as percentage of ICHG VOUT < VLOWV 20 %
IPRECHG_ACC Precharge current accuracy Fastcharge current >=40mA –10 10 %
ITERM Typical termination current, as percentage of ICHG VOUT = VBATREG 10 %
ITERM_ACC Termination current accuracy IBAT = 3mA (ICHG= 30mA) Tj = 25°C –10 10 %
ITERM_ACC Termination current accuracy IBAT = 3mA (ICHG= 30mA) Tj = 25°C 2.7 3.3 mA
VLOWV Pre-charge to fast-charge transition threshold VLOWVSEL = 3.0V, VBAT rising 2.9 3 3.1 V
VLOWV Pre-charge to fast-charge transition threshold VLOWVSEL = 2.8V, VBAT rising  2.7 2.8 2.9 V
VLOWV_HYS Battery LOWV hysteresis All settings 100 mV
VBUVLO Battery UVLO, VBAT falling BUVLO setting = b000 3 V
Battery UVLO, VBAT falling BUVLO setting = b011 2.8 V
Battery UVLO, VBAT falling BUVLO setting = b100 2.6 V
Battery UVLO, VBAT falling BUVLO setting = b101 2.4 V
Battery UVLO, VBAT falling BUVLO setting = b110 2.2 V
Battery UVLO, VBAT falling BUVLO setting = b111 2.0 V
VBUVLO_HYS Battery UVLO hysteresis, VBAT rising Any BUVLO Setting, value above VBAT, VIN = 5V 110 150 190 mV
VBUVLO_HYS Battery UVLO hysteresis, VBAT rising Any BUVLO Setting, value above VBAT, VIN = 0V  90 150 210 mV
VBATPOR Battery only power up voltage, VBAT rising -40C < Tj < 125C 3.08 3.21 3.46 V
VRCH Battery Recharge Threshold BAT falling, VRCH bit = 0 75 100 130 mV
BAT falling, VRCH bit = 1 175 200 230 mV
VBATSC Short on battery threshold for trickle charge, VBAT rising 1.6 1.8 2.0 V
VBATSC_HYS Battery short circuit voltage hysteresis 200 mV
IBATSC Trickle Charge Current  VBAT<VBATSC 1 mA
TERMPERATURE REGULATION AND TEMPERATURE SHUTDOWN
TREG Typical junction temperature regulation THERM_REG = 00 100 °C
TREG Typical junction temperature regulation THERM_REG = 01 80 °C
TREG Typical junction temperature regulation THERM_REG = 10 60 °C
TREG Typical junction temperature regulation THERM_REG = 11 Disabled
TSHUT_RISING Thermal shutdown rising threshold Temperature increasing 150 °C
TSHUT_FALLING Thermal shutdown falling threshold Temperature decreasing 135 °C
BATTERY NTC MONITOR
ITS_BIAS TS nominal bias current 36.5 38 39.5 µA
VT1_Entry Cold - 00 @ Approx. 0°C, default VIN = 5V 0.9575 1.0075 1.0575 V
VT2_Entry Cold - 01 @ Approx. 3°C VIN = 5V 0.8450 0.8900 0.9325 V
VT3_Entry Cold - 10 @ Approx. 5°C VIN = 5V 0.7775 0.8200 0.8600 V
VT4_Entry Cold - 11 @ Approx. -3°C VIN = 5V 1.0850 1.1425 1.2000 V
VT5_Entry Cool - 00 @ Approx. 10°C, default VIN = 5V 0.6350 0.6700 0.7025 V
VT6_Entry Warm - 00 @ Approx. 45°C, default VIN = 5V 0.1730 0.1850 0.198 V
VT7_Entry Hot - 00 @ Approx. 60°C, default VIN = 5V 0.1050 0.1150 0.1250 V
VT8_Entry Hot - 01 @ Approx. 65°C VIN = 5V 0.0875 0.0975 0.1075 V
VT9_Entry Hot - 10 @ Approx. 50°C VIN = 5V 0.1475 0.1575 0.1675 V
VT10_Entry Hot - 11 @ Approx. 45°C VIN = 5V 0.1750 0.1850 0.1950 V
VT1_Exit Cold - 00 @ Approx. 5°C, default VIN = 5V 0.7775 0.8200 0.8600 V
VT2_Exit Cold - 01 @ Approx. 8°C VIN = 5V 0.6875 0.7250 0.7600 V
VT3_Exit Cold - 10 @ Approx. 10°C VIN = 5V 0.6350 0.6700 0.7025 V
VT4_Exit Cold - 11 @ Approx. 2°C VIN = 5V 0.8800 0.9275 0.9725 V
VT5_Exit Cool - 00 @ Approx. 15°C, default VIN = 5V 0.5225 0.5500 0.5775 V
VT6_Exit Warm - 00 @ Approx. 41°C, default VIN = 5V 0.2080 0.2200 0.235 V
VT7_Exit Hot - 00 @ Approx. 55°C, default VIN = 5V 0.1250 0.1350 0.1450 V
VT8_Exit Hot - 01 @ Approx. 60°C VIN = 5V 0.1050 0.1150 0.1250 V
VT9_Exit Hot - 10 @ Approx. 45°C VIN = 5V 0.1750 0.1850 0.1950 V
VT10_Exit Hot - 11 @ Approx. 40°C VIN = 5V 0.2100 0.2200 0.23 V
VTS_ENZ TS monitoring enable threshold VTSMR<VTS_ENZ for TS function to be enabled TS Rising, VIN = 5V 1.8 2.1 2.8 V
VTS_CLAMP TS maximum voltage clamp TS open-circuit (float), VIN = 5V 2.2 2.8 3.3 V
PUSH BUTTON TIMERS AND THRESHOLDS
ITSMR Adapter present  36.5 38 39.5 µA
ITSMR Battery only mode   60 µA
VTSMR TSMR voltage to detect a button press event, battery only mode 90 mV
VTSMR TSMR voltage to detect a button press event, adapter present  90 mV
tWAKE1 WAKE1 Timer. Time from TSMR low detection MR_WAKE1_TIMER = 0 300 ms
MR_WAKE1_TIMER = 1 1 s
tWAKE2 WAKE2 Timer. Time from TSMR low detection MR_WAKE2_TIMER = 0 2 s
MR_WAKE2_TIMER = 1 3 s
tRESET_WARN RESET_WARN Timer. Time prior to HW RESET MR_RESET_WARN = 0 0.9 1 1.1 s
tLPRESS Long Press timer. Time from button press detection to long press action.  MR_LPRESS = 00 4.5 5 5.5 s
MR_LPRESS = 01 9 10 11 s
MR_LPRESS = 10 13.5 15 16.5 s
MR_LPRESS = 11 18 20 22 s
tRESTART(AUTOWAKE) RESTART Timer. Time from HW Reset to SYS power up AUTOWAKE = 00 0.5 s
AUTOWAKE = 01 1 s
AUTOWAKE = 10 2 s
AUTOWAKE = 11 4 s
BATTERY CHARGING TIMERS
tMAXCHG Charge safety timer Programmable range 180 720 min
tPRECHG Precharge safety timer 0.25 * tMAXCHG
I2C INTERFACE
Isink /PG pin current sink capability (QFN) VBAT = 4V 20 mA
VIL Input low threshold level VPULLUP = 1.8V, SDA and SCL 0.4 V
VIH Input high threshold level VPULLUP = 1.8V, SDA and SCL 1.3 V
VOL Output low threshold level IL = 5mA, sink current, VPULLUP =1.8V 0.4 V
ILKG High-Level leakage current VPULLUP = 1.8V 1 µA
LOGIC PINS
VOL Output low threshold level IL = 5mA, sink current, VPULLUP =3.3V, /INT pin 0.4 V