SLUSBK6 July   2014 BQ25071

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Application Schematic
  5. 5 Revision History
  6. 6 Device Comparison Table
  7. 7 Pin Configuration and Functions
  8. 8 Specifications
    1. 8.1 Absolute Maximum Ratings
    2. 8.2 Handling Ratings
    3. 8.3 Recommended Operating Conditions
    4. 8.4 Thermal Information
    5. 8.5 Electrical Characteristics
    6. 8.6 Timing Requirements
    7. 8.7 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 Input Overvoltage Protection
      2. 9.3.2 Undervoltage Lockout (UVLO)
      3. 9.3.3 External NTC Monitoring (TS)
      4. 9.3.4 50 mA LDO (LDO)
      5. 9.3.5 Charge Status Indicator (CHG)
      6. 9.3.6 Input Current Limit Control (EN)
    4. 9.4 Device Functional Modes
      1. 9.4.1 Charging Operation
        1. 9.4.1.1 Charger Operation with Minimum System Voltage Mode Enabled
        2. 9.4.1.2 Precharge Mode (V(BAT) ≤ V(LOWV))
        3. 9.4.1.3 Fast Charge Mode
      2. 9.4.2 Programmable Input Current Limit (ISET)
      3. 9.4.3 Thermal Regulation and Thermal Shutdown
  10. 10Application and Implementation
    1. 10.1 Application Information
    2. 10.2 Typical Application
      1. 10.2.1 Design Requirements
      2. 10.2.2 Detailed Design Procedure
        1. 10.2.2.1 Selection of Input and Output Capacitors
        2. 10.2.2.2 Thermal Considerations
      3. 10.2.3 Application Curves
  11. 11Power Supply Recommendations
  12. 12Layout
    1. 12.1 Layout Guidelines
    2. 12.2 Layout Example
  13. 13Device and Documentation Support
    1. 13.1 Trademarks
    2. 13.2 Electrostatic Discharge Caution
    3. 13.3 Glossary
  14. 14Mechanical, Packaging, and Orderable Information

8 Specifications

8.1 Absolute Maximum Ratings(1)

over operating free-air temperature range (unless otherwise noted)
MIN MAX UNIT
Input Voltage IN (with respect to GND) –0.3 30 V
EN, TS (with respect to GND) –0.3 7 V
Output Voltage BAT, OUT, LDO, CHG, ISET (with respect to GND) –0.3 7 V
Input Current (Continuous) IN 1.2 A
Output Current (Continuous) BAT 1.2 A
Output Current (Continuous) LDO 100 mA
Output Sink Current CHG 5 mA
Junction temperature, TJ –40 150 °C
(1) Stresses beyond those listed under absolute maximum ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under recommended operating conditions is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. All voltage values are with respect to the network ground pin unless otherwise noted.

8.2 Handling Ratings

MIN MAX UNIT
TSTG Storage temperature –65 150 °C
VESD Electrostatic discharge Human body model (HBM), per ANSI/ESDA/JEDEC JS-001, all pins (1) 0 3000 V
Charged device model (CDM), per JEDEC specification JESD22-C101, all pins (2) 0 1000 V
(1) JEDEC document JEP155 states that 500-V HBM allows safe manufacturing with a standard ESD control process.
(2) JEDEC document JEP157 states that 250-V CDM allows safe manufacturing with a standard ESD control process.

8.3 Recommended Operating Conditions

MIN MAX UNITS
VIN IN voltage 3.75(1) 28 V
IN operating voltage 3.75(1) 10.2
IIN Input current, IN 1 A
IOUT Output Current in charge mode, OUT 1 A
TJ Junction Temperature 0 125 °C
(1) Charge current may be limited at low input voltages due to the dropout of the device.

8.4 Thermal Information

THERMAL METRIC(1) bq25071 UNIT
DQC (10 PINS)
RθJA Junction-to-ambient thermal resistance 61.6 °C/W
RθJC(top) Junction-to-case (top) thermal resistance 65.5
RθJB Junction-to-board thermal resistance 22.8
ψJT Junction-to-top characterization parameter 1.5
ψJB Junction-to-board characterization parameter 22.7
RθJC(bot) Junction-to-case (bottom) thermal resistance 5.5
(1) For more information about traditional and new thermal metrics, see the IC Package Thermal Metrics application report, SPRA953.

8.5 Electrical Characteristics

Over junction temperature range 0°C ≤ TJ ≤ 125°C and recommended supply voltage (unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNITS
INPUT
V(UVLO) Under-voltage lock-out VIN: 0 V → 4 V 3.15 3.30 3.55 V
VHYS(UVLO) Hysteresis on V(UVLO) VIN: 4 V → 0 V 250 mV
VIN(SLP) Valid input source threshold VIN(SLP) above VBAT Input power good if VIN > VBAT + VIN(SLP)
V(BAT) = 3.6 V, VIN: 3.5 V → 4 V		 30 75 150 mV
VHYS(INSLP) Hysteresis on VIN(SLP) V(BAT) = 3.6 V, VIN: 4 V → 3.5 V 18 32 54 mV
tDGL(NO-IN) Delay time, input power loss to charger turn-off Time measured from VIN: 5 V → 2.5 V 1 μs fall-time 32 ms
VOVP Input over-voltage protection threshold VIN: 5 V → 11 V 10.2 10.5 10.8 V
VHYS(OVP) Hysteresis on OVP VIN: 11 V → 5 V 100 mV
QUIESCENT CURRENT
IBAT(PDWN) Battery current into BAT, No input connected VIN = 0 V(1), V(CHG) = Low, TJ = 85°C 6 μA
IIN(STDBY) Standby current into IN pin EN = HI, VIN = 5.5V 0.25 mA
EN = HI, VIN ≤ V(OVP) 0.5
EN = HI, VIN > V(OVP) 2
BATTERY CHARGER FAST-CHARGE
VBAT(REG) Battery charge regulation voltage TA = 0°C to 125°C, IOUT = 50 mA 3.455 3.5 3.545 V
TA = 25°C 3.455 3.5 3.539
VBAT(OVCH) Battery overcharge voltage threshold 3.62 3.7 3.78 V
IIN(RANGE) User programmable input current limit range R(ISET) = 1 kΩ to 1 0kΩ, EN = VSS 100 1000 mA
IIN(LIM) Input current limit, or fast-charge current EN = FLOAT 435 467 500 mA
EN = VSS KISET/RISET
KISET Fast charge current factor R(ISET) = 1 kΩ to 10 kΩ, EN = VSS 900 1000 1100 AΩ
VDO(IN-OUT) VIN – VOUT VIN = 3.55 V, IOUT = 0.75 A 500 900 mV
ISET SHORT CIRCUIT PROTECTION
RISET(MAX) Highest resistor value considered a short fault R(ISET): 900 Ω → 300 Ω, IOUT latches off, Cycle power to reset, Fault range > 1.10 A 430 700 Ω
IOUT(CL) Maximum OUT current limit regulation (Clamp) 1.07 2 A
PRE-CHARGE AND CHARGE DONE
V(LOWV) Pre-charge to fast-charge transition threshold 0.5 0.7 0.9 V
I(PRECHARGE) Precharge current to BAT during precharge mode V(BAT) = 0 V to 0.7 V 41.5 45 48.5 mA
RECHARGE OR REFRESH
V(RCH) Recharge detection threshold V(BAT) falling 3.1 3.3 3.5 V
LDO
V(LDO) LDO Output Voltage VIN = 5 V to 10.5 V,
I(LDO) = 0 mA to 50 mA		 4.7 4.9 5.1 V
I(LDO) Maximum LDO Output Current 60 mA
V(DO) Dropout Voltage VIN = 4.5V, I(LDO) = 50 mA 200 350 mV
LOGIC LEVELS ON EN
VIL Logic low input voltage 0.4 V
VIH Logic high input voltage 1.4 V
V(FLT) Logic FLOAT input voltage 600 850 1100 mV
I(FLTlkg) Maximum leakage sink or source current to keep in FLOAT 1 µA
IEN(DRIVE) Minimal drive current from an external device for Low or High 8 µA
BATTERY-PACK NTC MONITOR (TS)
V(COLD) TS Cold Threshold V(TS) Rising 24.5 25 25.5 %VLDO
V(CUTOFF) TS Cold Cutoff Threshold V(TS) Falling 1 %VLDO
V(HOT) TS Hot Threshold V(TS) Falling 12 12.5 13 %VLDO
VHOT(HYS) TS Hot Cutoff Threshold V(TS) Rising 1 %VLDO
CHG OUTPUT
VOL Output LOW voltage I(SINK) = 1 mA 0.45 V
IIH Leakage current CHG = 5 V 1 μA
THERMAL REGULATION
TJ(REG) Temperature Regulation Limit TJ rising 125 °C
TJ(OFF) Thermal shutdown temperature TJ rising 155 °C
TJ(OFF-HYS) Thermal shutdown hysteresis TJ falling 20 °C
(1) Force V(CHG)

8.6 Timing Requirements

MIN TYP MAX UNIT
INPUT
tBLK(OVP) Input overvoltage blanking time 100 μs
tREC(OVP) Input overvoltage recovery time Time measured from VIN: 11 V → 5 V
1 μs fall-time to LDO = HI,
V(BAT) = 3.5 V		 100 μs
ISET SHORT CIRCUIT PROTECTION
tDGL(SHORT) Deglitch time transition from I(SET) short to IOUT disable Clear fault by cycling V(BUS) or EN 1.5 ms
PRE-CHARGE AND CHARGE DONE
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
RECHARGE OR REFRESH
tDGL(RCH) Deglitch time, recharge threshold detected V(BAT) falling to New Charge Cycle 25 ms
BATTERY-PACK NTC MONITOR (TS)
tdgl(TS) Deglitch for TS Fault Fault detected on TS to stop charge 25 ms

8.7 Typical Characteristics

VIN = 5 V, VBAT = 3.2 V, I(CHG) = 280 mA, Typical Application Circuit
G012_slusbk6.gif
Figure 1. Voltage and Current vs Elapsed Time
G008_LUSA66.png
Figure 3. Battery Regulation Voltage vs Charge Current
G010_LUSA66.png
Figure 5. Charge Current vs Input Voltage
G007_LUSbk6.gif
VIN = 4.5 V IOUT = 1 A
Figure 2. Dropout Voltage vs Temperature
G009_LUSA66.png
Figure 4. OVP Threshold vs Temperature
G011_slusbk6.gif
VIN = 5 V
Figure 6. Input Current Limit vs Battery Voltage