SLUSFH5 May   2024 BQ25856-Q1

ADVANCE INFORMATION  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Pin Configuration and Functions
  6. 5 Specifications
    1. 5.1 Absolute Maximum Ratings
    2. 5.2 ESD Ratings
    3. 5.3 Recommended Operating Conditions
    4. 5.4 Thermal Information
    5. 5.5 Electrical Characteristics
    6. 5.6 Timing Requirements
    7. 5.7 Typical Characteristics
  7. 6 Detailed Description
    1. 6.1 Overview
    2. 6.2 Functional Block Diagram
    3. 6.3 Feature Description
      1. 6.3.1  Device Power-On-Reset
      2. 6.3.2  Device Power-Up From Battery Without Input Source
      3. 6.3.3  Device Power Up from Input Source
        1. 6.3.3.1 VAC Operating Window Programming (ACUV and ACOV)
        2. 6.3.3.2 REGN Regulator (REGN LDO)
        3. 6.3.3.3 Compensation-Free Buck-Boost Converter Operation
          1. 6.3.3.3.1 Light-Load Operation
        4. 6.3.3.4 Switching Frequency and Synchronization (FSW_SYNC)
        5. 6.3.3.5 Device HIZ Mode
      4. 6.3.4  Battery Charging Management
        1. 6.3.4.1 Autonomous Charging Cycle
          1. 6.3.4.1.1 Charge Current Programming (ICHG pin and ICHG_REG)
        2. 6.3.4.2 Li-Ion Battery Charging Profile
        3. 6.3.4.3 LiFePO4 Battery Charging Profile
        4. 6.3.4.4 Charging Termination for Li-ion and LiFePO4
        5. 6.3.4.5 Charging Safety Timer
        6. 6.3.4.6 Thermistor Qualification
          1. 6.3.4.6.1 JEITA Guideline Compliance in Charge Mode
          2. 6.3.4.6.2 Cold/Hot Temperature Window in Reverse Mode
      5. 6.3.5  Power Management
        1. 6.3.5.1 Dynamic Power Management: Input Voltage and Input Current Regulation
          1. 6.3.5.1.1 Input Current Regulation
            1. 6.3.5.1.1.1 ILIM_HIZ Pin
          2. 6.3.5.1.2 Input Voltage Regulation
      6. 6.3.6  Switching Frequency and Dithering Feature
      7. 6.3.7  Reverse Mode Power Direction
      8. 6.3.8  Integrated 16-Bit ADC for Monitoring
      9. 6.3.9  Status Outputs (PG, STAT1, STAT2, and INT)
        1. 6.3.9.1 Power Good Indicator (PG)
        2. 6.3.9.2 Charging Status Indicator (STAT1, STAT2 Pins)
        3. 6.3.9.3 Interrupt to Host (INT)
      10. 6.3.10 Protections
        1. 6.3.10.1 Voltage and Current Monitoring
          1. 6.3.10.1.1 VAC Over-voltage Protection (VAC_OVP)
          2. 6.3.10.1.2 VAC Under-voltage Protection (VAC_UVP)
          3. 6.3.10.1.3 Battery Over-voltage Protection (BAT_OVP)
          4. 6.3.10.1.4 Battery Over-current Protection (BAT_OCP)
          5. 6.3.10.1.5 Reverse Mode Over-voltage Protection (REV_OVP)
          6. 6.3.10.1.6 Reverse Mode Under-voltage Protection (REV_UVP)
          7. 6.3.10.1.7 DRV_SUP Under-voltage and Over-voltage Protection (DRV_OKZ)
          8. 6.3.10.1.8 REGN Under-voltage Protection (REGN_OKZ)
        2. 6.3.10.2 Thermal Shutdown (TSHUT)
      11. 6.3.11 Serial Interface
        1. 6.3.11.1 Data Validity
        2. 6.3.11.2 START and STOP Conditions
        3. 6.3.11.3 Byte Format
        4. 6.3.11.4 Acknowledge (ACK) and Not Acknowledge (NACK)
        5. 6.3.11.5 Target Address and Data Direction Bit
        6. 6.3.11.6 Single Write and Read
        7. 6.3.11.7 Multi-Write and Multi-Read
    4. 6.4 Device Functional Modes
      1. 6.4.1 Host Mode and Default Mode
      2. 6.4.2 Register Bit Reset
    5. 6.5 BQ25856-Q1 Registers
  8. 7 Application and Implementation
    1. 7.1 Application Information
    2. 7.2 Typical Applications
      1. 7.2.1 Typical Application
        1. 7.2.1.1 Design Requirements
        2. 7.2.1.2 Detailed Design Procedure
          1. 7.2.1.2.1 ACUV / ACOV Input Voltage Operating Window Programming
          2. 7.2.1.2.2 Charge Voltage Selection
          3. 7.2.1.2.3 Switching Frequency Selection
          4. 7.2.1.2.4 Inductor Selection
          5. 7.2.1.2.5 Input (VAC) Capacitor
          6. 7.2.1.2.6 Output (VBAT) Capacitor
          7. 7.2.1.2.7 Sense Resistor (RAC_SNS and RBAT_SNS) and Current Programming
          8. 7.2.1.2.8 Power MOSFETs Selection
          9. 7.2.1.2.9 Converter Fast Transient Response
      2. 7.2.2 Typical Application (4s LiFePO4 car battery configuration)
        1. 7.2.2.1 Design Requirements
  9. 8 Power Supply Recommendations
  10. 9 Layout
    1. 9.1 Layout Guidelines
    2. 9.2 Layout Example
  11. 10Device and Documentation Support
    1. 10.1 Device Support
      1. 10.1.1 Third-Party Products Disclaimer
    2. 10.2 Receiving Notification of Documentation Updates
    3. 10.3 Support Resources
    4. 10.4 Trademarks
    5. 10.5 Electrostatic Discharge Caution
    6. 10.6 Glossary
  12. 11Revision History
  13. 12Mechanical, Packaging, and Orderable Information
    1. 12.1 Packaging Information
    2. 12.2 Tape and Reel Information
    3. 12.3 Mechanical Data

デバイスごとのパッケージ図は、PDF版データシートをご参照ください。

メカニカル・データ（パッケージ｜ピン）
  • RRV|36
サーマルパッド・メカニカル・データ

5.5 Electrical Characteristics

VAC = ACP = ACN = SYS = SRP = SRN = 28V, TJ = -40°C to +150°C, and TJ = 25°C for typical values (unless otherwise noted)
PARAMETERTEST CONDITIONSMINTYPMAXUNIT
QUIESCENT CURRENTS
IQ_BATQuiescent battery current with BATFET on (ISRN + ISRP)VBAT = 28V, VAC = 0V, ADC_EN = 0, TJ < 105 °C17µA
VBAT = 28V, VAC = 0V, ADC_EN = 1, TJ < 105 °C500700µA
IQ_VACQuiescent input current (IVAC)Not switching0.751mA
IQ_REVQuiescent battery current in Reverse mode (ISRN + ISRP)Not switching0.751mA
VAC / BAT POWER UP
VVAC_OPVAC operating range4.270V
VVAC_OKVAC converter enable thresholdVAC rising, no battery4.2V
VVAC_OKZVAC converter disable thresholdVAC falling, no battery3.5V
VREF_ACUVACUV comparator threshold to enter VAC_UVPVACUV falling1.0951.11.106V
VREF_ACUV_HYSACUV comparator threshold hysteresisVACUV rising50mV
VVAC_INT_OVVAC internal threshold to enter VAC_OVPIN rising727476V
VVAC_INT_OVZVAC internal thresholds to exit VAC_OVPIN falling697173V
VREF_ACOVACOV comparator threshold to enter VAC_OVPVACOV rising1.1841.21.206V
VREF_ACOV_HYSACOV comparator threshold hysteresisVACOV falling50mV
CHARGE VOLTAGE REGULATION
VVFB_RANGEFeedback voltage range1.5041.566V
VVFB_NOMNominal feedback voltageVFB_REG = 0x101.536V
VVFB_ACCFeedback voltage regulation accuracyTJ = 0°C to 85°C–0.50.5%
TJ = -40°C to 150°C–0.70.7%
RFBGFBG resistance to PGNDIFBG = 1mA3355Ω
FAST CHARGECURRENT REGULATION
ICHG_REG_RANGECharge current regulation range0.420A
ICHG_REG_ACCI2C setting charge current regulation accuracyRBAT_SNS = 5mΩ, VBAT = 12V, 36V, 55V. ICHG_REG = 0x012C15A
–33%
RBAT_SNS = 5mΩ, VBAT = 12V, 36V, 55V. ICHG_REG = 0x00645A
–33%
RBAT_SNS = 5mΩ, VBAT = 12V, 36V, 55V. ICHG_REG = 0x00282A
–55%
KICHGHardware charge current limit set factor (Amperes of charge current per kΩ on ICHG pin)RBAT_SNS = 5mΩ, RICHG = 10kΩ, 5kΩ, and 3.33kΩ485052A x kΩ
VREF_ICHGICHG pin voltage when ICHG pin is in regulation2.0V
PRE-CHARGE CURRENT REGULATION
IPRECHG_RANGEPrecharge current regulation rangeVFB < VBAT_LOWV * VVFB_REG0.2510A
IPRECHG_ACCI2C setting precharge current accuracyRBAT_SNS = 5mΩ, VFB < VBAT_LOWV * VVFB_REG. IPRECHG = 0x003C3.0A
–44%
RBAT_SNS = 5mΩ, VFB < VBAT_LOWV * VVFB_REG. IPRECHG[1:0] = 0x00141.0A
–1010%
RBAT_SNS = 5mΩ, VFB < VBAT_LOWV * VVFB_REG. IPRECHG[1:0] = 0x000A0.50A
–3030%
CHARGE TERMINATION
ITERM_RANGETermination current rangeVFB = VVFB_REG0.2510A
ITERM_ACCTermination current accuracyRBAT_SNS = 5mΩ, VBAT = 12V, 36V, 55V. ITERM = 0x001E1.5A
–77%
RBAT_SNS = 5mΩ, VBAT = 12V, 36V, 55V. ITERM = 0x000A0.50A
–2020%
RBAT_SNS = 5mΩ, VBAT = 12V, 36V, 55V. ITERM = 0x00050.250A
–5050%
BATTERY VOLTAGE COMPARATORS
VBAT_SHORTTrickle charge to pre-charge transitionVSRN rising2.833.2V
Pre-charge to trickle charge transitionVSRN falling2.22.42.6V
VBAT_LOWVPre-charge to fast-charge transitionVFB rising, as percentage of VFB_REG, VBAT_LOWV[2:0] = 369.071.773.8%
VFB rising, as percentage of VFB_REG, VBAT_LOWV[2:0] = 264.366.769.0%
VFB rising, as percentage of VFB_REG, VBAT_LOWV[2:0] = 1525558%
VFB rising, as percentage of VFB_REG, VBAT_LOWV[2:0] = 0273033%
VBAT_LOWV_HYSBAT_LOWV hysteresis5%
VRECHGBattery recharge threshold for Li-Ion and LiFePO4VFB falling, as percentage of VFB_REG, VRECHG[1:0] = 397.6%
VFB falling, as percentage of VFB_REG, VRECHG[1:0] = 295.2%
VFB falling, as percentage of VFB_REG, VRECHG[1:0] = 194.3%
VFB falling, as percentage of VFB_REG, VRECHG[1:0] = 093.0%
INPUT CURRENT REGULATION
IIREG_DPM_ACCI2C setting input current regulation accuracy in forward modeRAC_SNS = 2mΩ, IAC_DPM = 0x00A020A
–33%
RAC_SNS = 2mΩ, IAC_DPM = 0x005010A
–44%
RAC_SNS = 2mΩ, IAC_DPM = 0x00285.0A
–77%
KILIMHardware input current limit set factor (Amperes of input current per kΩ on ILIM_HIZ pin)RAC_SNS = 2mΩ, RILIM = 5kΩ, 2.5kΩ, and 1.67kΩ485052A x kΩ
VREF_ILIM_HIZILIM_HIZ pin voltage when ILIM_HIZ pin is in regulation2.0V
VIH_ILIM_HIZILIM_HIZ input high threshold to enter HIZ modeVILIM_HIZ rising3.7V
INPUT VOLTAGE REGULATION
VVREG_DPM_RANGEInput voltage DPM regulation range4.265V
VVREG_DPM_ACCI2C setting input voltage regulation accuracyVAC_DPM = 0x076C38V
–22%
VVREG_DPM_ACCI2C setting input voltage regulation accuracy in forward mode VAC_DPM = 0x04E225V
–22%
VAC_DPM = 0x03B619V
–22%
VACUV_DPMACUV pin voltage when in VDPM regulation1.1981.2101.222V
REVERSE MODE VOLTAGE REGULATION
VREV_RANGEVAC Voltage regulation range in Reverse mode3.365V
VREV_ACCVoltage regulation accuracy in Reverse modeVAC_REV = 0x096048V
–22%
VAC_REV = 0x057828V
–22%
VREV_ACCVAC Voltage regulation accuracy in Reverse modeVAC_REV = 0x02EE15V
–22%
VAC_REV = 0x00FA5V
–22%
REVERSE MODE CURRENT REGULATION
IIREV_ACCInput current regulation accuracy in Reverse modeRAC_SNS = 2mΩ, IAC_REV = 0x00A020A
–3.53.5%
RAC_SNS = 2mΩ, IAC_REV = 0x00285.0A
–5.55.5%
CHARGE MODE BATTERY-PACK NTC MONITOR
VT1_RISETS pin voltage rising T1 threshold, charge suspended above this voltage.As Percentage to REGN, TS_T1=0°C w/ 103AT72.7573.2573.85%
VT1_FALLTS pin voltage falling T1 threshold, charge re-enabled below this voltage.As Percentage to REGN, TS_T1=0°C w/ 103AT71.57272.5%
VT2_RISETS pin voltage rising T2 threshold, charge back to reduced ICHG above this voltageAs Percentage to REGN, TS_T2=10°C w/ 103AT67.7568.2568.75%
VT2_FALLTS pin voltage falling T2 threshold. Charge back to normal below this voltageAs Percentage to REGN, TS_T2=10°C w/ 103AT66.4566.9567.45%
VT3_FALLTS pin voltage falling T3 threshold, charge to ICHG and reduced VFB_REG below this voltage.As Percentage to REGN, TS_T3=45°C w/ 103AT44.2544.7545.25%
VT3_RISETS pin voltage rising T3 threshold. Charge back to normal above this voltage.As Percentage to REGN, TS_T3=45°C w/ 103AT45.5546.0546.55%
VT5_FALLTS pin voltage falling T5 threshold, charge suspended below this voltageAs Percentage to REGN, TS_T5=60°C w/ 103AT33.87534.37534.875%
VT5_RISETS pin voltage rising T5 threshold. Charge back to ICHG and reduced VFB_REG above this voltage.As Percentage to REGN, TS_T5=60°C w/ 103AT3535.536%
REVERSE MODE BATTERY-PACK NTC MONITOR
VBCOLD_RISETS pin voltage rising TCOLD threshold. Reverse mode suspended above this voltageAs Percentage to REGN (BCOLD = –20°C w/ 103AT)79.4580.080.55%
VBCOLD_RISETS pin voltage rising TCOLD threshold. Reverse mode suspended above this voltageAs Percentage to REGN (BCOLD = –10°C w/ 103AT)76.6577.1577.65%
VBCOLD_FALLTCOLD comparator falling threshold.As Percentage to REGN (–20°C w/ 103AT)78.278.779.2%
VBCOLD_FALLTCOLD comparator falling threshold.As Percentage to REGN (–10°C w/ 103AT)75.575.676.5%
VBHOT_FALLTS pin voltage falling THOT threshold. Reverse mode suspends below this voltageAs Percentage to REGN, (BHOT = 55°C w/ 103AT)37.237.738.2%
VBHOT_FALLTS pin voltage falling THOT threshold. Reverse mode suspends below this voltageAs Percentage to REGN, (BHOT = 60°C w/ 103AT)33.87534.37534.875%
VBHOT_FALLTS pin voltage falling THOT threshold. Reverse mode suspends below this voltageAs Percentage to REGN, (BHOT 65°C w/ 103AT)30.7531.2531.75%
VBHOT_RISETS pin voltage rising THOT threshold. Reverse mode allowed above this voltageAs Percentage to REGN, (BHOT = 55°C w/ 103AT)38.539.039.95%
VBHOT_RISETS pin voltage rising THOT threshold. Reverse mode allowed above this voltageAs Percentage to REGN, (BHOT = 60°C w/ 103AT)3535.536%
VBHOT_RISETS pin voltage rising THOT threshold. Reverse mode allowed above this voltageAs Percentage to REGN, (BHOT 65°C w/ 103AT)32.032.533.0%
BATTERY CHARGER PROTECTION
VBAT_OVBattery overvoltage thresholdVFB rising, as percentage of VFB_REG102.5104105.5%
VBAT_OVZBattery overvoltage falling thresholdVFB falling, as percentage of VFB_REG100.5102103.5%
VICHG_OCBattery charge over-current thresholdVSRP - VSRN rising120170mV
THERMAL SHUTDOWN
TSHUTThermal shutdown rising thresholdTemperature increasing150°C
Thermal shutdown falling thresholdTemperature decreasing135°C
REGN REGULATOR AND GATE DRIVE SUPPLY (DRV_SUP)
VREGNREGN LDO output voltageIREGN = 20mA4.855.2V
VAC = 5V, IREGN = 20mA4.354.6V
IREGNREGN LDO current limitVREGN = 4.5V70mA
VREGN_OKREGN OK threshold to allow switchingREGN rising3.55V
VDRV_UVPZDRV_SUP under-voltage threshold to allow switchingDRV_SUP rising3.7V
VDRV_OVPDRV_SUP over-voltage threshold to disable switchingDRV_SUP rising12.813.213.6V
POWER-PATH MANAGER
IAC_LOADVAC discharge load current16mA
IBAT_LOADBattery (SRN) discharge load current16mA
SWITCHING FREQUENCY AND SYNC
fSWSwitching FrequencyRFSW_SYNC = 133kΩ212250288kHz
RFSW_SYNC = 50kΩ425500575kHz
VIH_SYNCFSW_SYNC input high threshold1.3V
VIL_SYNCFSW_SYNC input low threshold0.4V
PWSYNCFSW_SYNC input pulse width80ns
PWM DRIVERS
RHIDRV1_ONBuck side high-side turnon resistanceVBTST1 - VSW1 = 5V3.4Ω
RHIDRV1_OFFBuck side high-side turnoff resistanceVBTST1 - VSW1 = 5V1.0Ω
VBTST1_REFRESHBootstrap refresh comparator threshold voltageBTST1 falling, VBTST1 - VSW1 when low-side refresh pulse is requested2.73.13.9V
RLODRV1_ONBuck side low-side turnon resistanceVREGN = 5V3.4Ω
RLODRV1_OFFBuck side low-side turnoff resistanceVREGN = 5V1.0Ω
tDT1Buck side dead time, both edges45ns
RHIDRV2_ONBoost side high-side turnon resistanceVBTST2 - VSW2 = 5V3.4Ω
RHIDRV2_OFFBoost side high-side turnoff resistanceVBTST2 - VSW2 = 5V1.0Ω
VBTST2_REFRESHBootstrap refresh comparator threshold voltageBTST2 falling, VBTST2 - VSW2 when low-side refresh pulse is requested2.73.13.9V
RLODRV2_ONBoost side low-side turnon resistanceVREGN = 5V3.4Ω
RLODRV2_OFFBoost side low-side turnoff resistanceVREGN = 5V1.0Ω
tDT2Boost side dead time, both edges 45ns
ANALOG-TO-DIGITAL CONVERTER (ADC)
tADC_CONVConversion-time, each measurementADC_SAMPLE[1:0] = 0024ms
ADC_SAMPLE[1:0] = 0112ms
ADC_SAMPLE[1:0] = 106ms
ADCRESEffective resolutionADC_SAMPLE[1:0] = 001415bits
ADC_SAMPLE[1:0] = 011314bits
ADC_SAMPLE[1:0] = 101213bits
ADC MEASUREMENT RANGE AND LSB
IAC_ADCInput current ADC reading (positive or negative)Range with 2mΩ RAC_SNS–5000050000mA
LSB with 2mΩ RAC_SNS2mA
IBAT_ADCBattery current ADC reading (positive or negative)Range with 5mΩ RBAT_SNS–2000020000mA
LSB with 5mΩ RBAT_SNS2mA
VAC_ADCInput voltage ADC readingRange065534mV
LSB2mV
VBAT_ADCBattery voltage ADC readingRange065534mV
LSB2mV
TSADCTS voltage ADC reading, as percentage of REGNRange099.9%
LSB0.098%
VFB_ADCFB voltage ADC readingRange02047mV
LSB1mV
I2C INTERFACE (SCL, SDA)
VIHInput high threshold level1.3V
VILInput low threshold level0.4V
VOLOutput low threshold levelSink current = 5mA0.4V
IIN_BIASHigh-level leakage currentPull up rail 3.3V1µA
LOGIC I/O PIN (CE, PG, STAT1, STAT2)
VIHInput high threshold level (CE)1.3V
VOLOutput low threshold level (CE, PG, STAT1, STAT2)Sink current = 5mA0.4V
VILInput low threshold level (CE)0.4V
IOUT_BIASHigh-level leakage current (CE, PG, STAT1, STAT2)Pull up rail 3.3V1µA