SLUSCM2B October   2017  – November 2018

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
    1.     Typical Application Circuit
  4. 4 Revision History
  5. 5 Description (continued)
  6. 6 Device Comparison Table
  7. 7 Pin Configuration and Functions
    1.     Pin Functions
  8. 8 Specifications
    1. 8.1 Absolute Maximum Ratings
    2. 8.2 ESD Ratings
    3. 8.3 Recommended Operating Conditions
    4. 8.4 Thermal Information
    5. 8.5 Electrical Characteristics
    6. 8.6 Typical Characteristics
  9. 9 Detailed Description
    1. 9.1 Overview
    2. 9.2 Functional Block Diagram
    3. 9.3 Feature Description
      1. 9.3.1 Undervoltage Lockout (UVLO)
      2. 9.3.2 Power On
      3. 9.3.3 Overvoltage Protection (OVP)
      4. 9.3.4 Dynamic Power-path Management
        1. 9.3.4.1 Input Source Connected (Adapter or USB)
          1. 9.3.4.1.1 Input DPM Mode (VIN-DPM)
          2. 9.3.4.1.2 DPPM Mode
          3. 9.3.4.1.3 Battery Supplement Mode
        2. 9.3.4.2 Input Source Not Connected
      5. 9.3.5 Battery Charging
        1. 9.3.5.1 Charge Current Translator
        2. 9.3.5.2 Battery Detection And Recharge
        3. 9.3.5.3 Battery Disconnect (SYSOFF Input)
        4. 9.3.5.4 Dynamic Charge Timers (TMR Input)
        5. 9.3.5.5 Status Indicators (PGOOD, CHG)
        6. 9.3.5.6 Thermal Regulation And Thermal Shutdown
      6. 9.3.6 Battery Pack Temperature Monitoring
      7. 9.3.7 Half-Wave Adaptors
    4. 9.4 Device Functional Modes
      1. 9.4.1 Sleep Mode
  10. 10Application and Implementation
    1. 10.1 Application Information
    2. 10.2 Typical Application – bq24079QW-Q1 Charger Design Example
      1. 10.2.1 Design Requirements
      2. 10.2.2 Detailed Design Procedure
        1. 10.2.2.1 Calculations
          1. 10.2.2.1.1 Program the Fast Charge Current (ISET):
          2. 10.2.2.1.2 Program the Input Current Limit (ILIM)
          3. 10.2.2.1.3 Program 6.25-hour Fast-Charge Safety Timer (TMR)
        2. 10.2.2.2 TS Function
        3. 10.2.2.3 CHG and PGOOD
        4. 10.2.2.4 System ON/OFF (SYSOFF)
        5. 10.2.2.5 Selecting In, Out And Bat Pin Capacitors
      3. 10.2.3 Application Curves
  11. 11Power Supply Recommendations
  12. 12Layout
    1. 12.1 Layout Guidelines
    2. 12.2 Layout Example
    3. 12.3 Thermal Package
  13. 13Device and Documentation Support
    1. 13.1 Device Support
      1. 13.1.1 Third-Party Products Disclaimer
    2. 13.2 Documentation Support
      1. 13.2.1 Related Documentation
    3. 13.3 Receiving Notification of Documentation Updates
    4. 13.4 Community Resources
    5. 13.5 Trademarks
    6. 13.6 Electrostatic Discharge Caution
    7. 13.7 Glossary
  14. 14Mechanical, Packaging, and Orderable Information

Package Options

Refer to the PDF data sheet for device specific package drawings

Mechanical Data (Package|Pins)
  • RGT|16
Thermal pad, mechanical data (Package|Pins)
Orderable Information

8.5 Electrical Characteristics

Over ambient temperature range (–40°C ≤ TA ≤ 125°C) and the recommended supply voltage range (unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
INPUT
UVLO Undervoltage lock-out VIN: 0 V → 4 V 3.2 3.3 3.4 V
Vhys Hysteresis on UVLO VIN: 4 V → 0 V 200 300 mV
VIN(DT) Input power detection threshold Input power detected when VIN > VBAT + VIN(DT)
VBAT = 3.6 V, VIN: 3.5 V → 4 V		 50 80 135 mV
Vhys Hysteresis on VIN(DT) VBAT = 3.6 V, VIN: 4 V → 3.5 V 20 mV
tDGL(PGOOD) Deglitch time, input power detected status Time measured from VIN: 0 V → 5 V with 1-μs
rise time to PGOOD = LO		 1.2 ms
VOVP Input overvoltage protection threshold VIN: 5 V → 7 V 6.4 6.6 6.8 V
Vhys Hysteresis on OVP VIN: 7 V → 5V 110 mV
tDGL(OVP) Input overvoltage blanking time (OVP fault deglitch) 50 μs
tREC Input overvoltage recovery time Time measured from VIN: 11 V → 5 V with 1-μs
fall time to PGOOD = LO		 1.2 ms
ILIM, ISET SHORT CIRCUIT DETECTION (CHECKED DURING STARTUP)
ISC Current source VIN > UVLO and VIN > VBAT + VIN(DT) 1.3 mA
VSC VIN > UVLO and VIN > VBAT + VIN(DT) 520 mV
QUIESCENT CURRENT
IBAT(PDWN) Sleep current into BAT pin CE = LO or HI, Input power not detected,
No load on OUT pin, TA ≤ 125°C		 4.4 13 μA
IIN Standby current into IN pin EN1 = HI, EN2 = HI, VIN = 6 V, TA ≤ 125°C 38.8 55 μA
EN1 = HI, EN2 = HI, VIN = 10 V, TA ≤ 125°C 90.2 200
ICC Active supply current, IN pin CE = LO, VIN = 6 V, No load on OUT pin,
VBAT > VBAT(REG), (EN1, EN2) ≠ (HI, HI)		 1.5 mA
POWER PATH
VDO(IN-OUT) VIN – VOUT VIN = 4.3 V, IIN = 1 A, VBAT = 4.1 V 300 475 mV
VDO(BAT-OUT) VBAT – VOUT IOUT = 1 A, VIN = 0 V, VBAT > 3 V 50 100 mV
VO(REG) OUT pin voltage regulation VIN > VOUT + VDO(IN-OUT) 5.4 5.5 5.65 V
IINmax Maximum input current EN1 = LO, EN2 = LO 90 95 101 mA
EN1 = HI, EN2 = LO 440 475 500
EN2 = HI, EN1 = LO KILIM/RILIM A
KILIM Maximum input current factor ILIM = 500 mA to 1.5 A 1500 1610 1720 AΩ
ILIM = 200 mA to 500 mA 1300 1525 1770
IINmax Programmable input current limit range EN2 = HI, EN1 = LO, RILIM = 8 kΩ to 1.1 kΩ 200 1500 mA
VIN-DPM Input voltage threshold when input current is reduced EN2 = LO, EN1 = X 4.35 4.5 4.63 V
VDPPM Output voltage threshold when charging current is reduced 4.2 4.3 4.4 V
VBSUP1 Enter battery supplement mode VBAT = 3.6 V, RILIM = 1.5 kΩ, RLOAD = 10 Ω → 2 Ω VOUT ≤ VBAT –40mV V
VBSUP2 Exit battery supplement mode VBAT = 3.6 V, RILIM = 1.5 kΩ, RLOAD = 2 Ω → 10 Ω VOUT ≥ VBAT–20mV V
VO(SC1) Output short-circuit detection threshold, power-on VIN > VUVLO and VIN > VBAT + VIN(DT) 0.8 0.9 1 V
VO(SC2) Output short-circuit detection threshold, supplement mode VBAT – VOUT > VO(SC2) indicates short-circuit VIN > VUVLO and VIN > VBAT + VIN(DT) 200 250 300 mV
tDGL(SC2) Deglitch time, supplement mode short circuit 250 μs
tREC(SC2) Recovery time, supplement mode short circuit 60 ms
BATTERY CHARGER
IBAT Source current for BAT pin short-circuit detection VBAT = 1.5 V 4 7.5 11 mA
VBAT(SC) BAT pin short-circuit detection threshold VBAT rising 1.6 1.8 2 V
VBAT(REG) Battery charge voltage 4.059 4.100 4.141 V
VLOWV Pre-charge to fast-charge transition threshold VIN > VUVLO and VIN > VBAT + VIN(DT) 2.9 3 3.1 V
tDGL1(LOWV) Deglitch time on pre-charge to fast-charge transition 25 ms
tDGL2(LOWV) Deglitch time on fast-charge to pre-charge transition 25 ms
ICHG Battery fast charge current range VBAT(REG) > VBAT > VLOWV, VIN = 5 V, CE = LO,
EN1 = LO, EN2 = HI 		100 1500 mA
Battery fast charge current CE = LO, EN1= LO, EN2 = HI,
VBAT > VLOWV, VIN = 5 V, IINmax > ICHG, No load on OUT pin, Thermal loop and DPPM loop not active		 KISET/RISET A
KISET Fast charge current factor 797 890 975 AΩ
IPRECHG Pre-charge current KPRECHG/RISET A
KPRECHG Pre-charge current factor 55 88 118 AΩ
ITERM Termination comparator detection threshold (internally set) CE = LO, (EN1, EN2) ≠ (LO, LO),
VBAT > VRCH, t < tMAXCH, VIN = 5 V, DPPM loop and thermal loop not active 		0.09×ICHG 0.1×ICHG 0.11×ICHG A
CE = LO, (EN1, EN2) = (LO, LO),
VBAT > VRCH, t < tMAXCH, VIN = 5 V, DPPM loop and thermal loop not active 		0.027×ICHG 0.033×ICHG 0.040×ICHG
tDGL(TERM) Deglitch time, termination detected 25 ms
VRCH Recharge detection threshold VIN > VUVLO and VIN > VBAT + VIN(DT) 50 100 145 mV
tDGL(RCH) Deglitch time, recharge threshold detected 62.5 ms
tDGL(NO-IN) Delay time, input power loss to OUT LDO turn-off VBAT = 3.6 V. Time measured from
VIN: 5 V → 3 V, 1-μs fall time		 20 ms
IBAT(DET) Sink current for battery detection VBAT = 2.5 V 5 7.5 10 mA
tDET Battery detection timer BAT high or low 250 ms
BATTERY CHARGING TIMERS
tPRECHG Pre-charge safety timer value TMR = floating 1440 1800 2160 s
tMAXCHG Charge safety timer value TMR = floating 14400 18000 21600 s
tPRECHG Pre-charge safety timer value 18 kΩ < RTMR < 72 kΩ RTMR × KTMR s
tMAXCHG Charge safety timer value 18 kΩ < RTMR < 72 kΩ 10×R TMR ×KTMR s
KTMR Timer factor 36 48 60 s/kΩ
BATTERY-PACK NTC MONITOR(1)
INTC NTC bias current VIN > UVLO and VIN > VBAT + VIN(DT) 71 75 80 μA
VHOT High temperature trip point Battery charging, VTS Falling 270 300 330 mV
VHYS(HOT) Hysteresis on high trip point Battery charging, VTS Rising from VHOT 30 mV
VCOLD Low temperature trip point Battery charging, VTS Rising 2000 2100 2200 mV
VHYS(COLD) Hysteresis on low trip point Battery charging, VTS Falling from VCOLD 300 mV
tDGL(TS) Deglitch time, pack temperature fault detection TS fault detected to charger disable 50 ms
THERMAL REGULATION
TJ(REG) Temperature regulation limit 125 °C
TJ(OFF) Thermal shutdown temperature TJ Rising 155 °C
TJ(OFF-HYS) Thermal shutdown hysteresis 20 °C
LOGIC LEVELS ON EN1, EN2, CE, SYSOFF
VIL Logic LOW input voltage 0 0.4 V
VIH Logic HIGH input voltage 1.4 6 V
IIL Input sink current VIL= 0 V 1 μA
IIH Input source current VIH= 1.4 V 10 μA
LOGIC LEVELS ON PGOOD, CHG
VOL Output LOW voltage ISINK = 5 mA 0.4 V
(1) These numbers set trip points of 0°C and 50°C while charging, with 3°C hysteresis on the trip points, with a Vishay Type 2 curve NTC with an R25 of 10 kΩ.
bq24079QW-Q1 pwr_up_lus810.gifFigure 1. Power-Up, Power-Down, Power Good Indication
bq24079QW-Q1 prechg_lus810.gifFigure 2. Pre- to Fast-Charge, Fast- to Pre-Charge Transition – tDGL1(LOWV), tDGL2(LOWV)
bq24079QW-Q1 rechg_lus810.gifFigure 3. Recharge – tDGL(RCH)
bq24079QW-Q1 shrt_cir_lus810.gifFigure 4. OUT Short-Circuit – Supplement Mode
bq24079QW-Q1 batt_pack_lus810.gifFigure 5. Battery Pack Temperature Sensing – TS Pin. Battery Temperature Increasing