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BQ25060DQCT

BQ25060DQCT

  • 厂商:

    BURR-BROWN(德州仪器)

  • 封装:

    WSON-10_2X3MM-EP

  • 描述:

    IC LI-ION LDO CHRG 1A 10WSON

  • 数据手册
  • 价格&库存
BQ25060DQCT 数据手册
bq25060 www.ti.com SLUSA32 – MAY 2010 1A, Single-Input, Single Cell Li-Ion Battery Charger with 50-mA LDO, and External Power Path Control Check for Samples: bq25060 FEATURES 1 • • • • • • • • • • • DESCRIPTION 30V input Rating, With 10.5V Over-Voltage Protection (OVP) FET Controller for External Battery FET for External Power Path Control (BGATE) Input Voltage Dynamic Power Management 50mA integrated Low Dropout Linear Regulator (LDO) Programmable Charge Current Through ISET and EN Pin 0.5% Battery Voltage Regulation Accuracy 7% Charge Current Regulation Accuracy Thermal Regulation and Protection Battery NTC Monitoring During Charge Status Indication – Charging/Done Available in small 2mm × 3mm 10 Pin SON Package The bq25060 is a highly integrated Li-Ion linear battery charger targeted at space-limited portable applications. It operates from either a USB port or AC Adapter and charges a single-cell Li-Ion battery with up to 1A of charge current. The 30V input voltage range with input over-voltage protections supports low-cost unregulated adapters. The bq25060 has a single power output that charges the battery. The system load is connected to OUT. The low-battery system startup circuitry maintains OUT greater than 3.4V whenever an input source is connected. This allows the system to start-up and run whenever an input source is connected regardless of the battery voltage. The charge current is programmable up to 1A using the ISET input. Additionally, a 4.9V 50mA LDO is integrated into the IC for supplying low power external circuitry. The battery is charged in three phases: conditioning, constant current and constant voltage. In all charge phases, an internal control loop monitors the IC junction temperature and reduces the charge current if an internal temperature threshold is exceeded. The charger power stage and charge current sense functions are fully integrated. The charger function has high accuracy current and voltage regulation loops, charge status display, and charge termination. APPLICATIONS • • • • Smart Phones Mobile Phones Portable Media Players Low Power Handheld Devices TYPICAL APPLICATION CIRCUIT VGPIO VGPIO bq25060 USB or Adaptor VBUS D+ DGND 1 R2 100kΩ CHG 8 OUT 10 STATUS IN C1 0.1uF VDD C2 1uF QBAT BGATE 9 7 EN BAT HOST 6 PACK+ 2 ISET 3 VSS TS 5 LDO 4 TEMP C4 0.1uF R1 1 kΩ PACK - VLDO C3 0.1uF GPIO 1 Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. Copyright © 2010, Texas Instruments Incorporated bq25060 SLUSA32 – MAY 2010 www.ti.com This integrated circuit can be damaged by ESD. Texas Instruments recommends that all integrated circuits be handled with appropriate precautions. Failure to observe proper handling and installation procedures can cause damage. ESD damage can range from subtle performance degradation to complete device failure. Precision integrated circuits may be more susceptible to damage because very small parametric changes could cause the device not to meet its published specifications. ORDERING INFORMATION PART NO. MARKING MEDIUM QUANTITY bq25060DQCR DAN Tape and Reel 3000 bq25060DQCT DAN Tape and Reel 250 PACKAGE DISSIPATION RATINGS TABLE PACKAGE RqJA RqJC TA < 25°C POWER RATING DERATING FACTOR ABOVE TA = 25°C 10 Pin 2mm × 3mm SON (1) 58.7°C/W (2) 3.9°C/W 1.70W 0.017W/°C (1) (2) Maximum power dissipation is a function of TJ(max), RqJA, and TA. The maximum allowable power dissipation at any allowable ambient temperature is PD = [TJ(max) - TA]/RqJA. This data is based on using the JEDEC High-K board and the exposed die pad is connected to a Cu pad on the board. The pad is connected to the ground plane by a 2×3 via matrix. ABSOLUTE MAXIMUM RATINGS (1) over operating free-air temperature range (unless otherwise noted) VALUE / UNIT IN (with respect to VSS) –0.3 to 30 V EN, TS, CHG, BGATE, ISET (with respect to VSS) –0.3 to 7 V Output Voltage BAT, OUT, LDO, CHG, BGATE (with respect to VSS) –0.3 to 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 Input Voltage 5 mA Junction temperature, TJ –40°C to 150°C Storage temperature, TSTG –65°C to 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 terminal unless otherwise noted. RECOMMENDED OPERATING CONDITIONS over operating free-air temperature range (unless otherwise noted) VIN IN voltage range IN operating voltage range MIN MAX 3.55 28 4.4 10.2 UNITS V IIN Input current, IN 1 A IOUT Ouput Current in charge mode, OUT 1 A RISET Input current limit programming resistor range 1 10 kΩ TJ Junction Temperature 0 125 °C ELECTRICAL CHARACTERISTICS Over junction temperature range 0°C ≤ TJ ≤ 125°C and VIN = 5V (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX UNITS 3.25 3.40 3.55 V INPUT VUVLO 2 Under-voltage lock-out VIN: 0V → 4V Submit Documentation Feedback Copyright © 2010, Texas Instruments Incorporated Product Folder Link(s): bq25060 bq25060 www.ti.com SLUSA32 – MAY 2010 ELECTRICAL CHARACTERISTICS (continued) Over junction temperature range 0°C ≤ TJ ≤ 125°C and VIN = 5V (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX UNITS VHYS-UVLO Hysteresis on UVLO VIN: 4V → 0V VBATUVLO Battery UVLO VBAT rising VHYS-BUVLO Hysteresis on BAT UVLO VBAT falling VIN-SLP Valid input source threshold VIN-SLP above VBAT Input power good if VIN > VBAT + VIN–SLP VBAT = 3.6V, VIN: 3.5V → 4V VHYS-INSLP Hysteresis on VIN-SLP VBAT = 3.6V, VIN: 4V → 3.5V 32 mV tDGL(NO-IN) Deglitch time, input power loss to charger turn-off Time measured from VIN: 5V → 2.5V 1µs fall-time 32 ms VOVP Input over-voltage protection threshold VIN: 5 V → 11 V VHYS-OVP Hysteresis on OVP VIN: 11 V → 5 V tDGL(OVP) Input over-voltage deglitch time tREC(OVP) Input over-voltage recovery time Time measured from VIN: 11V → 5V 1µs fall-time to LDO = HI, VBAT = 3.5V VIN_DPM Input DPM threshold VIN Falling, VIN-DPM enabled with EN 250 1.95 2.05 mV 2.15 V 125 30 10.2 4.2 75 10.5 mV 150 mV 10.8 V 100 mV 100 µs 100 µs 4.30 4.4 V 6 µA QUIESCENT CURRENT IBAT(PDWN) Battery current into BAT, No input connected VIN = 0V, TJ = 85°C IBAT(DONE) BAT current, charging terminated VIN = 6V, VBAT > VBAT(REG) 10 µA IIN(STDBY) Standby current into IN pin EN = HI, VIN < VOVP 0.6 mA EN = HI, VIN ≥ VOVP 2 ICC Active supply current, IN pin VIN = 6V, no load on OUT pin, VBAT > VBAT(REG), IC enabled 3 mA BATTERY CHARGER FAST-CHARGE VBAT(REG) Battery charge regulation voltage TA = 0°C to 125°C, IOUT = 50 mA TA = 25°C 4.16 4.20 4.23 4.179 4.200 4.221 IIN_RANGE User programmable input current limit range RISET = 1kΩ to 10kΩ, EN = VSS 100 IIN(LIM) Input current limit, or fast-charge current EN = FLOAT 435 EN = VSS KISET Fast charge current factor RISET = 1kΩ to 10kΩ, EN = VSS VDO(IN-OUT) VIN – VOUT VIN = 4.2V, IOUT = 0.75 A 467 V 1000 mA 500 mA KISET/RISET 900 1000 1100 AΩ 500 900 mV 700 Ω ISET SHORT CIRCUIT PROTECTION RISET_MAX Highest resistor value considered a short fault RISET: 900Ω → 300Ω, IOUT latches off, Cycle power to reset, Fault range > 1.10A tDGL-SHORT Deglitch time transition from ISET short to IOUT disable Clear fault by cycling VBUS or EN IOUT-CL Maximum OUT current limit regulation (Clamp) 430 1.5 1.2 ms 2 A V PRE-CHARGE AND CHARGE DONE VLOWV Pre-charge to fast-charge transition threshold External power path control disabled, BGATE = VSS 2.4 2.5 2.6 tDGL(LOWV) Deglitch time on fast-charge to pre-charge transition External power path control enabled VBAT rising or falling 2.8 2.9 3.0 IPRECHARGE Precharge current to BAT during precharge mode VBAT = 0V to 2.9V, Battery FET connected, Current out of BAT VBAT = 0V to 2.5V, BGATE = VSS, Input current limit regulated to IPRECHARGE ITERM Default termination current threshold VIN = 5V, ICHARGE = 100 mA to 1 A 25 ms 28 37 45 41.5 45 48.5 7.5 10.5 13.5 VBAT(REG) –0.13V VBAT(REG) –0.1V VBAT(REG) –0.065V mA %IIN(LIM) RECHARGE OR REFRESH VRCH Recharge detection threshold VBAT falling tDGL(RCH) Deglitch time, recharge threshold detected VBAT falling 25 V ms EXTERNAL POWER PATH CONTROL Submit Documentation Feedback Copyright © 2010, Texas Instruments Incorporated Product Folder Link(s): bq25060 3 bq25060 SLUSA32 – MAY 2010 www.ti.com ELECTRICAL CHARACTERISTICS (continued) Over junction temperature range 0°C ≤ TJ ≤ 125°C and VIN = 5V (unless otherwise noted) PARAMETER VOUT(REG) Output regulation voltage TEST CONDITIONS VBAT ≤ 2.9 V 2.9 V < VBAT ≤ 3.6V VBAT > 3.6 V MIN TYP MAX 3.4 3.5 3.6 UNITS V 3.44 3.59 3.75 V VBAT + Vdrop(QBAT) V VSUPP1 Enter supplement mode threshold VBAT = 3.4 V, VOUT Falling VOUT ≤ VBAT -0.06 V VSUPP2 Exit supplement mode threshold VBAT = 3.4 V, VOUT Rising VOUT ≥ VBAT-0.02 V VLDO LDO Output Voltage VIN = 5.5V, ILDO = 0mA to 50mA ILDO Maximum LDO Output Current VDO Dropout Voltage LDO 4.7 4.9 5.1 60 VIN = 4.5V, ILDO = 50mA V mA 200 300 mV 0.4 V LOGIC LEVELS ON EN VIL Logic low input voltage VIH Logic high input voltage 1.4 VFLT Logic FLOAT input voltage 600 IFLT_leakage Maximum leakage sink or source current to keep in FLOAT IEN_DRIVE Minimal drive current from an external device for Low or High V 850 1100 mV 1 µA 8 µA LOGIC LEVELS ON BGATE VIL Logic LOW input voltage VIH Logic HIGH input voltage 0.4 1.4 V V BATTERY-PACK NTC MONITOR (TS) VCOLD TS Cold Threshold Temperature falling VHYS(COLD) Hysteresis on Cold threshold Temperature rising, BGATE disabled VHOT TS Hot Threshold Temperature rising VHYS(HOT) Hysteresis on Hot Threshold Temperature falling, BGATE disabled tdgl(TS) Deglitch for TS Fault IN or OUT TS Fault VOL Output LOW voltage ISINK = 5 mA IIH Leakage current V/CHG = 5 V 24.4 25 25.6 1 12 12.5 % of VLDO % of VLDO 13 % of VLDO 1 % of VLDO 25 ms CHG OUTPUT 0.45 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 4 Submit Documentation Feedback Copyright © 2010, Texas Instruments Incorporated Product Folder Link(s): bq25060 bq25060 www.ti.com SLUSA32 – MAY 2010 DEVICE INFORMATION SIMPLIFIED BLOCK DIAGRAM LDO + Q1 Q2 OUT VIN Precharge Current Source + ISET + 125C Charge Pump TJ External Power Path Control Mode BAT IIN(REG) 1V 2.9V + VOUT(REG) + VIN_DPM + Charge Pump VOUT(MIN) USB Enable TERMINATION COMPARATOR BGATE + VREF + VOUTMIN 100mV External Power Path Control Mode Sleep Comparator 75mV EN + CHARGE CONTROL OVP Comparator VOUTMIN Enable Comparator VBAT + VOVP VBAT VIN + 3.6V VIN VLDO STATUS OUTPUT DISABLE + + CHG TS COLD TS HOT TS VSS Submit Documentation Feedback Copyright © 2010, Texas Instruments Incorporated Product Folder Link(s): bq25060 5 bq25060 SLUSA32 – MAY 2010 www.ti.com PIN CONFIGURATION IN ISET VSS OUT 1 10 2 9 BGATE 8 CHG 3 bq 25060 LDO 4 7 EN TS 5 6 BAT 10-pin 2mm x 3mm SON PIN FUNCTIONS PIN NAME NO. I/O DESCRIPTION IN 1 I Input power supply. IN is connected to the external DC supply (AC adapter or USB port). Bypass IN to VSS with at least a 0.1µF ceramic capacitor. ISET 2 I Current programming input. Connect a resistor from ISET to VSS to program the input current limit when the user proagammable mode is selected by the EN pin. The resistor range is between 1kΩ and 10kΩ to set the current between 100 mA and 1A. VSS 3 – Ground terminal. Connect to the thermal pad and the ground plane of the circuit. LDO 4 O LDO output. LDO is regulated to 4.9V and drives up to 50mA. Bypass LDO to VSS with a 0.1µF ceramic capacitor. LDO is enabled when VUVLO < VIN < VOVP. TS 5 I Battery pack NTC monitoring input. Connect the battery pack NTC from TS to VSS to monitor battery pack temperature. The default pack temperature range is 0°C to 45°C thresholds. EN 7 I Enable input. Drive EN high to disable the IC. Connect EN to VSS to place the bq25060 in the user pgrammable mode where the input current is programmed using the ISET input. Leave EN flaoting to place the bq25060 in USB500 mode. See the Charger Enable section for details on using the EN interface. CHG 8 O Charge status indicator open-drain output. CHG is pulled low while the device is charging the battery. CHG goes high impedance when the battery is fully charged and does not indicate subsequent recharge cycles. BAT 6 O Battery connection output. BAT is the sense input for the battery as well as the precharge current output. Connect BAT to the battery and bypass BAT to VSS with a 0.1µF ceramic capacitor. BGATE 9 I/O Battery P-Channel FET gate drive output. Connect BGATE to the gate of the external P-Channel FET that connects the battery to OUT. Connect BGATE to VSS if the external FET is not used. No external capacitor is recommended from BGATE to GND. OUT 10 O System output connection. OUT supplies the system with a minimum voltage of 3.4V (min.) to ensure system operation whenever an input adapter is connected regardless of the battery voltage. Bypass OUT to VSS with a minimum 1µF ceramic capacitor. Pad – There is an internal electrical connection between the exposed thermal pad and the VSS pin of the device. The thermal pad must be connected to the same potential as the VSS pin on the printed circuit board. Do not use the thermal pad as the primary ground input for the device. VSS pin must be connected to ground at all times. Thermal PAD 6 Submit Documentation Feedback Copyright © 2010, Texas Instruments Incorporated Product Folder Link(s): bq25060 bq25060 www.ti.com SLUSA32 – MAY 2010 APPLICATION CIRCUITS VGPIO VGPIO bq25060 USB or Adaptor VBUS D+ DGND 1 R2 100kΩ CHG 8 OUT 10 STATUS IN C1 0.1uF VDD C2 1uF QBAT BGATE 9 7 EN BAT 6 TS 5 HOST PACK+ 2 TEMP C4 0.1uF ISET R1 1 kΩ PACK - 3 VSS LDO 4 VLDO C3 0.1uF GPIO Figure 1. Typical Application Circuit Using the External Power Path Control Feature VGPIO VGPIO bq25060 USB or Adaptor VBUS D+ DGND 1 R2 100kΩ CHG 8 OUT 10 STATUS IN C1 0.1uF VDD C2 1uF 7 EN BGATE 9 BAT 6 TS 5 HOST PACK+ 2 TEMP ISET R1 1 kΩ PACK - 3 VSS LDO 4 VLDO C3 0.1uF GPIO Figure 2. Typical Application Circuit Disabling the External Power Path Control Feature Submit Documentation Feedback Copyright © 2010, Texas Instruments Incorporated Product Folder Link(s): bq25060 7 bq25060 SLUSA32 – MAY 2010 www.ti.com TYPICAL CHARACTERISTICS Using circuit in Figure 1, TA = 25°C, unless otherwise specified ADAPTER INSERTION ENABLE USING EN EN 2 V/div VIN = 0 V - 5 V, VBAT = 3.3 V, ICHG = 280 mA VIN = 5 V, VBAT = 3 V, ICHG = 280 mA CHG 2 V/div VIN 5 V/div BGATE 2 V/div BGATE 2 V/div LDO 2 V/div ICHG 0.5 A/div IIN 100 mA/div 20 ms/div 10 ms/div Figure 3. Figure 4. DISABLE USING EN INPUT OVP EN 2 V/div LDO 2 V/div VIN 10 V/div VIN = 5 V to 29 V, VBAT = 3.8 V VIN = 5 V, VBAT = 3.4 V, ICHG = 280 mA VBAT 2V/div BGATE 2 V/div LDO 2 V/div IIN 200 mA/div IBAT 0.5 A/div 1 ms/div 50 µs/div Figure 5. Figure 6. PRE-CHARGE MODE TO MINIMUM OUTPUT REGULATION MODE MINIMUM OUTPUT REGULATION MODE TO CONSTANT CURRENT (CC) MODE VIN = 5 V, VBAT = 1.8 V to 3.45 V, ICHG = 467 mA VIN = 5 V, VBAT = 2.4 V to 3.6 V, ICHG = 467 mA VBAT 500 V/div VBAT 500 V/div BGATE 2 V/div BGATE 2 V/div IBAT 500 mA/div IBAT 500 mA/div 20 ms/div 20 ms/div Figure 7. 8 Figure 8. Submit Documentation Feedback Copyright © 2010, Texas Instruments Incorporated Product Folder Link(s): bq25060 bq25060 www.ti.com SLUSA32 – MAY 2010 TYPICAL CHARACTERISTICS (continued) Using circuit in Figure 1, TA = 25°C, unless otherwise specified PRE-CHARGE TO CONSTANT VOLTAGE (CV) MODE VIN-DPM VIN 2 V/div VBAT 500 mV/div IIN 500 mA/div VIN = 5 V, VBAT = 2.8 V to 4.18 V, ICHG = 467 mA BGATE 2 V/div BGATE 2 V/div IBAT 500 mA/div VIN = 5 V with current limit of 600 mA, VBAT = 3.2 V, ICHG = 93 mA to 935 mA 20 ms/div 200 µs/div Figure 9. Figure 10. SUPPLEMENT MODE CHARGE CYCLE DEMO VOUT 2 V/div IIN 1 A/div VBAT 2 V/div BGATE 1 V/div VIN = 5 V, ICHG = 280 mA, BGATE =Enabled, CBAT = 2000 µF, No battery connected IIN 100 mA/div VOUT 2 V/div IOUT 2 A/div BGATE 2 V/div VIN = 5 V, VBAT = 3.2 V, ICHG = 935 mA, IOUT = 0 A to 2 A 20 ms/div 100 µs/div Figure 11. Figure 12. BATTERY VOLTAGE vs CHARGE CURRENT RDSON (From IN to OUT) vs JUNCTION TEMPERATURE 4.24 1.20 CV Mode Iload = 500 mA 4.23 1.00 4.22 RDSON - W VBAT - Battery Voltage - V 0.80 4.21 4.20 0.60 4.19 0.40 4.18 0.20 4.17 4.16 0 200 400 600 800 1000 0.00 -50 ICHRG - Charge Current - mA Figure 13. 0 50 100 TJ - Junction Temperature - °C 150 Figure 14. Submit Documentation Feedback Copyright © 2010, Texas Instruments Incorporated Product Folder Link(s): bq25060 9 bq25060 SLUSA32 – MAY 2010 www.ti.com TYPICAL CHARACTERISTICS (continued) Using circuit in Figure 1, TA = 25°C, unless otherwise specified INPUT CURRENT LIMIT vs INPUT VOLTAGE OUTPUT VOLTAGE vs CHARGE CURRENT 4.00 1000 VBAT = 3 V 900 3.90 Dropout Thermal Regulation 3.80 700 VOUT - Output Voltage - V IINLIM - Input Current Limit - mA 800 600 500 400 300 3.70 3.60 3.50 3.40 3.30 200 3.20 100 3.10 0 4 5 6 7 8 9 10 11 External Power Path Control Mode VBAT = 3 V 3.00 0.000 VIN - Input Voltage - V 0.200 0.400 0.600 0.800 1.000 ICHRG - Charge Current - mA Figure 15. Figure 16. DETAILED FUNCTIONAL DESCRIPTION The bq25060 is a highly integrated Li-Ion linear battery charger targeted at space-limited portable applications. It operates from either a USB port or AC Adapter and charges a single-cell Li-Ion battery with up to 1A of charge current. The 30V input voltage range with input over-voltage protections supports low-cost unregulated adapters. The bq25060 has a single power output that charges the battery. The system load is connected to OUT. The low-battery system startup circuitry maintains OUT pin voltage at VOUT(REG) whenever an input source is connected. This allows the system to start-up and run whenever an input source is connected regardless of the battery voltage. The charge current is programmable up to 1A using the EN input. Additionally, a 4.9V 50mA LDO is integrated into the IC for supplying low power external circuitry. External FET Controller (BGATE) The External Power Path Control feature is implemented using the BGATE output. BGATE is also used to enable/ disable the External Power Path Control feature. When power is first applied to either VBAT or VIN on the bq25060, the BGATE output is tested. If the BGATE pin is connected to VSS, the External Power Path Control feature is disabled. In order to enable the External Power Path Control feature after it has been disabled, the battery and the input source must be removed and reconnected and BGATE must NOT be connected to VSS. With External Power Path Control enabled, BGATE is used to drive an external P-channel FET that connects the battery to the system output. The state of this FET is dependant on the battery voltage and the IC status. In discharge mode, BGATE is pulled to GND to turn the external FET on fully. During discharge mode, the output is connected directly to the battery. Discharge mode is entered under the following conditions: 1. IC disabled or no input power 2. Supplement mode When not in one of these conditions, the BGATE output is controlled by the bq25060 and changes depending on which mode is required. See the Charging Operation section for more details. 10 Submit Documentation Feedback Copyright © 2010, Texas Instruments Incorporated Product Folder Link(s): bq25060 bq25060 www.ti.com SLUSA32 – MAY 2010 Enable/ Disable External Power Path Control When power is first applied to the bq25060, either at the IN or BAT input, the bq25060 checks the BGATE output. The device sources a small current out of BGATE for 2ms and monitors the voltage. If VBGATE is connected to ground and the voltage does not rise above logic High, the External Power Path Control feature is disabled and VLOWV is set to 2.5V. If the BGATE voltage rises above logic High, the External Power Path Control feature is enabled and VLOWV is set to 2.9V. The bq25060 only does this check when power is initially applied. Power must removed from IN and BAT and then reapplied to initiate another check. Figure 17 illustrates the startup check procedure. No Input Source or Battery Connected Input source OR Battery connected? NO YES Source Current to BGATE BGATE = VSS? YES External Power Path Control Disabled V LOWV = 2.5V NO External Power Path Control Enabled VLOWV = 2.9V Figure 17. BGATE Monitor Sequence Charging Operation The bq25060 charges a battery in 3 stages while maintaining a minimum system output. When the bq25060 is enabled by EN, the battery voltage is monitored to verify which stage of charging must be used. The bq25060 charges in precharge mode, minimum output regulation mode, or normal CC/CV mode based on the battery voltage. Submit Documentation Feedback Copyright © 2010, Texas Instruments Incorporated Product Folder Link(s): bq25060 11 bq25060 SLUSA32 – MAY 2010 www.ti.com Charger Operation with External Power Path Control Mode Enabled PRECHARGE CC FAST CHARGE Maximum Charge Current CV TAPER System Voltage 4.2V IIN(LIM) 3.5V VLOWV Battery Voltage IPRECHG CHG = Hi -Z ITERM Figure 18. Typical Charging Cycle with External Power Path Control Enabled Precharge Mode (VBAT ≤ VLOWV) The bq25060 enters precharge mode when VBAT ≤ VLOWV. Upon entering precharge mode, the battery is charged with a 40mA current source and /CHG goes low. During precharge mode, VOUT is regulated to 3.5V and the battery is charged from the internal fixed 40mA current source connected to the BAT output. With BGATE connected to GND, the system output is connected to the battery and therefore the system voltage is equal to the battery voltage. Minimum Output Regulation Mode (2.9V
BQ25060DQCT 价格&库存

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BQ25060DQCT
  •  国内价格 香港价格
  • 250+9.20197250+1.14150
  • 500+8.79976500+1.09161
  • 750+8.59838750+1.06663
  • 1250+8.375131250+1.03893
  • 1750+8.244671750+1.02275
  • 2500+8.119162500+1.00718
  • 6250+7.848866250+0.97365

库存:496