Datasheet

ManualsBrandsTEXAS INSTRUMENTS ManualsPMICsPMIC - battery management Charge management Li-Ion, Li-Po WSON 12 (3x2) Surface-mount

BatteryPack

VBUS

GND

D+

D-

USBPort

1 Fm

1kW

1.5kW

2kW

GND

Adaptor

VDD

D-

D+

GND

TTDM

Host

SystemLoad

DisconnectafterDetection

ISET/100/500 mA

ISET

VSS

PRETERM

D+ D-

ISET2

CHG

OUT

bq24050/2

bq24050

bq24052

bq24055

www.ti.com

SLUS940B –SEPTEMBER 2009–REVISED JUNE 2012

800mA, Single Cell Li-Ion and Li-Pol Battery Charger With Automatic Adaptor

and USB Detection

Check for Samples: bq24050, bq24052, bq24055

FEATURES

• CHARGING – Fixed 10 Hour Safety Timer

– 1% Charge Voltage Accuracy • SYSTEM

– 10% Charge Current Accuracy – Auto Input Source Detection (D+,D– Pins)

– Pin Selectable USB 100mA and 500mA – No Device Transceiver Required

Maximum Input Current Limit

– USB Friendly

– Programmable Termination and Precharge

– Automatic Termination and Timer Disable

Threshold

Mode (TTDM) for Absent Battery Pack With

• PROTECTION Thermistor

– 30V Input Rating; with 6.6V Input – Status Indication – Charging/Done

Overvoltage Protection

– Available in Small 2×2mm

DFN-10 or

– Input Voltage Dynamic Power Management 2×3mm

DFN-12 Packages

– 125°C Thermal Regulation; 150°C Thermal

APPLICATIONS

Shutdown Protection

• Smart Phones

– OUT Short-Circuit Protection and ISET

short detection

• PDAs

– Operation over JEITA Range via Battery

• MP3 Players

NTC - ½ Fast-Charge-Current at Cold, 4.06V

• Low-Power Handheld Devices

at Hot

DESCRIPTION

The bq2405x series of devices are highly integrated Li-Ion and Li-Pol linear chargers devices targeted at space-

limited portable applications. The devices operate from either a USB port or AC adapter. The high input voltage

range with input overvoltage protection supports low-cost unregulated adapters.

The bq2405x has a single power output that charges the battery. A system load can be placed in parallel with the

battery as long as the average system load does not keep the battery from charging fully during the 10 hour

safety timer.

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. (Description continued on next page)

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.

Summary of content (40 pages)

PAGE 1
bq24050 bq24052 bq24055 www.ti.com SLUS940B – SEPTEMBER 2009 – REVISED JUNE 2012 800mA, Single Cell Li-Ion and Li-Pol Battery Charger With Automatic Adaptor and USB Detection Check for Samples: bq24050, bq24052, bq24055 FEATURES 1 • • CHARGING – 1% Charge Voltage Accuracy – 10% Charge Current Accuracy – Pin Selectable USB 100mA and 500mA Maximum Input Current Limit – Programmable Termination and Precharge Threshold PROTECTION – 30V Input Rating; with 6.
PAGE 2
bq24050 bq24052 bq24055 SLUS940B – SEPTEMBER 2009 – REVISED JUNE 2012 www.ti.com These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates. DESCRIPTION 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.
PAGE 3
bq24050 bq24052 bq24055 www.ti.com SLUS940B – SEPTEMBER 2009 – REVISED JUNE 2012 RECOMMENDED OPERATING CONDITIONS (1) IN voltage range VIN IN operating voltage range, Restricted by VDPM and VOVP MIN NOM 3.5 28 UNIT V 4.45 6.45 V 0.8 A IIN Input current, IN pin IOUT Current, OUT pin 0.8 A TJ Junction temperature 0 125 °C RPRE-TERM Programs precharge and termination current thresholds 1 10 kΩ RISET Fast-charge current programming resistor 0.675 49.9 kΩ 1.
PAGE 4
bq24050 bq24052 bq24055 SLUS940B – SEPTEMBER 2009 – REVISED JUNE 2012 www.ti.
PAGE 5
bq24050 bq24052 bq24055 www.ti.com SLUS940B – SEPTEMBER 2009 – REVISED JUNE 2012 ELECTRICAL CHARACTERISTICS (continued) Over junction temperature range 0°C ≤ TJ ≤ 125°C and recommended supply voltage (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT RECHARGE OR REFRESH Recharge detection threshold – Normal Temp VIN = 5V, VTS = 0.5V, VOUT: 4.25V → VRCH VO(REG)0.120 VO(REG 0.095 VO(REG)0.070 V Recharge detection threshold – Hot Temp VIN = 5V, VTS = 0.2V, VOUT: 4.
PAGE 6
bq24050 bq24052 bq24055 SLUS940B – SEPTEMBER 2009 – REVISED JUNE 2012 www.ti.com ELECTRICAL CHARACTERISTICS (continued) Over junction temperature range 0°C ≤ TJ ≤ 125°C and recommended supply voltage (unless otherwise noted) PARAMETER TEST CONDITIONS MIN CTS Optional Capacitance – ESD VTS-0°C bq24050/2/5 Low temperature CHG Pending Low Temp Charging to Pending; VTS: 1V → 1.5V VHYS-0°C Hysteresis at 0°C Charge pending to low temp charging; VTS: 1.
PAGE 7
bq24050 bq24052 bq24055 www.ti.com SLUS940B – SEPTEMBER 2009 – REVISED JUNE 2012 ELECTRICAL CHARACTERISTICS (continued) Over junction temperature range 0°C ≤ TJ ≤ 125°C and recommended supply voltage (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT D+/D– DETECTION – bq24050/2/5 tDPDM DetectionTime from start of D+/Ddetection to latched output t=0 at D– pulled-up > 0.5V or D+ pulled up externally, >0.
PAGE 8
bq24050 bq24052 bq24055 SLUS940B – SEPTEMBER 2009 – REVISED JUNE 2012 www.ti.com PIN CONFIGURATION bq24055 bq24050/2 1 IN 1 IN OUT 10 OUT 12 2 ISET TS 9 2 ISET TS 11 3 VSS CHG 8 3 VSS CHG 10 4 PRETERM 4 PRETERM ISET 2 7 5 D+ 5 D+ D- 6 6 PG ISET2 9 D- 8 NC 7 PIN FUNCTIONS NAME bq24050/2 bq24055 I/O DESCRIPTION IN 1 1 I Input power, connected to external DC supply (AC adapter or USB port). Expected range of bypass capacitors 1μF to 10μF, connect from IN to VSS.
PAGE 9
bq24050 bq24052 bq24055 www.ti.com SLUS940B – SEPTEMBER 2009 – REVISED JUNE 2012 Typical Application Circuit: bq24050/2 IOUT_FAST_CHG = 540mA; IOUT_PRE_CHG = 108mA; IOUT_TERM = 54mA bq24050/2 Adaptor 1 IN DC+ OUT 10 System Load 1.
PAGE 10
bq24050 bq24052 bq24055 SLUS940B – SEPTEMBER 2009 – REVISED JUNE 2012 www.ti.com FUNCTIONAL BLOCK DIAGRAM Internal Charge Current Sense w/Multiple Outputs IN OUT OUT IN OUT + _ + _ 80 Input mV Power + Detect _ + - IN-DPMREF IOUT x 1.5 V 540 AW Charge Pump OUTREGREF TJ°C + _ 125°CREF FAST CHARGE Thermal Regulation PRE-CHARGE ISET IN + _ 1.
PAGE 11
bq24050 bq24052 bq24055 www.ti.com SLUS940B – SEPTEMBER 2009 – REVISED JUNE 2012 TYPICAL OPERATIONAL CHARACTERISTICS SETUP: bq24055 typical applications schematic; VIN = 5V, VBAT = 3.
PAGE 12
bq24050 bq24052 bq24055 SLUS940B – SEPTEMBER 2009 – REVISED JUNE 2012 www.ti.com TYPICAL OPERATIONAL CHARACTERISTICS (continued) SETUP: bq24055 typical applications schematic; VIN = 5V, VBAT = 3.6V (unless otherwise indicated) RISET = 1k; IOUT_FAST_CHG = 540mA; RPAC_TERM = 2k; IOUT_PRE_CHG = 108mA; IOUT_TERM = 54mA Vpg Vpg 2V/div 5V/div Vchg Vchg 2V/div 2V/div Vout 2V/div 500mV/div Vts Battery Detect Mode Viset 2V/div Vin 5V/div t - time - 50ms/div 10kΩ resistor from TS to GND.
PAGE 13
bq24050 bq24052 bq24055 www.ti.com SLUS940B – SEPTEMBER 2009 – REVISED JUNE 2012 TYPICAL OPERATIONAL CHARACTERISTICS (continued) SETUP: bq24055 typical applications schematic; VIN = 5V, VBAT = 3.6V (unless otherwise indicated) RISET = 1k; IOUT_FAST_CHG = 540mA; RPAC_TERM = 2k; IOUT_PRE_CHG = 108mA; IOUT_TERM = 54mA PROTECTION CIRCUITS WAVEFORMS 1V/div Vout Vout 1V/div Vchg 5V/div Viset Battery Threshold Reached Vchg 2V/div 500mV/div 1V/div IOUT Clamped Current Viset V_0.1 W_OUT V_0.
PAGE 14
bq24050 bq24052 bq24055 SLUS940B – SEPTEMBER 2009 – REVISED JUNE 2012 www.ti.com TYPICAL OPERATIONAL CHARACTERISTICS (continued) SETUP: bq24055 typical applications schematic; VIN = 5V, VBAT = 3.
PAGE 15
bq24050 bq24052 bq24055 www.ti.com SLUS940B – SEPTEMBER 2009 – REVISED JUNE 2012 FUNCTIONAL GENERAL DESCRIPTION The bq2405x is a highly integrate family of 2×2 or 2×3mm single cell Li-Ion and Li-Pol chargers. The charger can be used to charge a battery, power a system or both. The charger has three phases of charging: Pre-charge to recover a fully discharged battery, fast-charge constant current to supply the buck charge safely and voltage regulation to safely reach full capacity.
PAGE 16
bq24050 bq24052 bq24055 SLUS940B – SEPTEMBER 2009 – REVISED JUNE 2012 VO(REG) PreConditioning Phase www.ti.com Thermal Regulation Phase Current Regulation Phase Voltage Regulation and Charge Termination Phase DONE IO(OUT) FAST-CHARGE CURRENT PRE-CHARGE CURRENT AND TERMINATION THRESHOLD Battery Voltage, V(OUT) Battery Current, I(OUT) Charge Complete Status, Charger Off VO(LOWV) I(TERM) IO(PRECHG) T(THREG) 0A Temperature, Tj T(PRECHG) T(CHG) DONE Figure 23.
PAGE 17
bq24050 bq24052 bq24055 www.ti.com SLUS940B – SEPTEMBER 2009 – REVISED JUNE 2012 The D+ and D– pin connections inside the charger are disconnected within 100ms of the D+ or D– lines being pulled high (start of detection), to minimize any interaction between the charger detection pins and the USB normal communications.
PAGE 18
0V DISHYS EN 60°C 60°CHYS 45°C 45°CHYS 10°CHYS 10°C 0°CHYS 0°C LDOHYS LDO 1.8V VSS tDGL(TS) Disabled 4.06 V HOT Operation tDGL(TS) Normal Operation tDGL(TS) 4.06 V HOT Operation tDGL(TS) HOT Fault tDGL(TS) Cold Fault LDO Mode t < tDGL(IS) Normal Operation Cold Operation tDGL(TS_IOC) Falling tDGL(TS) tDGL(TTDM) Exit Cold Fault Drawing Not to Scale Dots Show Threshold Trip Points fllowed by a deglitch time before transitioning into a new mode.
PAGE 19
bq24050 bq24052 bq24055 www.ti.com SLUS940B – SEPTEMBER 2009 – REVISED JUNE 2012 Apply Input Power Is Chip Enabled &Alive? VTS > VEN & VIN>VUVLO No Start Running USB Detection Routine Yes Is power good? VBAT +VDT < VIN < VOVP & VUVLO < VIN No Yes Turn on PG FET – PG pin LOW Set Input Current Limit to 100mA and Start Charge Perform ISET & OUT short tests Remember ISET2 State Yes Has ISET2 changed state since Detection Routine was run? No Yes Set charge current based on ISET2 truth table.
PAGE 20
bq24050 bq24052 bq24055 SLUS940B – SEPTEMBER 2009 – REVISED JUNE 2012 www.ti.com Power Good Indication (PG) After application of a 5V source, the input voltage rises above the UVLO and sleep thresholds (VIN> VOUT+VDT), but is less than OVP (VIN< VOVP), then the PG FET turns on and provides a low impedance path to ground. SEE Figure 5, Figure 6, and Figure 18.
PAGE 21
bq24050 bq24052 bq24055 www.ti.com SLUS940B – SEPTEMBER 2009 – REVISED JUNE 2012 ISET An external resistor is used to Program the Output Current (50 to 800mA) and can be used as a current monitor. RISET = KISET ÷ IOUT (0) Where: IOUT is the desired fast charge current; KISET is a gain factor found in the electrical specification For greater accuracy at lower currents, part of the sense FET is disabled to give better resolution. Figure 19 shows the transition from low current to higher current.
PAGE 22
bq24050 bq24052 bq24055 1.8 1.6 IO - Output Current - A 1.4 www.ti.com IOUT Clamp min - max IOUT Fault min - max SLUS940B – SEPTEMBER 2009 – REVISED JUNE 2012 1.2 IOUT Internal Clamp Range 1 0.8 IOUT Programmed max 0.6 ISET Short Fault Range min 0.4 0.2 Non Restricted Operating Area 0 100 1000 10000 ISET - W Figure 27.
PAGE 23
bq24050 bq24052 bq24055 www.ti.com SLUS940B – SEPTEMBER 2009 – REVISED JUNE 2012 ISET2 Is a 3-state input and programs the Input Current Limit/Regulation Threshold. A low will program a regulated fast charge current via the ISET resistor and is the maximum allowed input/output current for any ISET2 setting, Float will program a 100mA Current limit and High will program a 500mA Current limit.
PAGE 24
bq24050 bq24052 bq24055 SLUS940B – SEPTEMBER 2009 – REVISED JUNE 2012 www.ti.com TS The TS pin is designed to follow the new JEITA temperature standard for Li-Ion and Li-Pol batteries. There are now four thresholds, 60°C, 45°C, 10°C, and 0°C. Normal operation occurs between 10°C and 45°C. If between 0°C and 10°C the charge current level is cut in half and if between 45°C and 60°C the regulation voltage is reduced to 4.1Vmax, see Figure 26.
PAGE 25
bq24050 bq24052 bq24055 www.ti.com SLUS940B – SEPTEMBER 2009 – REVISED JUNE 2012 The battery detect routine is run when entering and exiting TTDM to verify if battery is present, or run all the time if battery is missing and not in TTDM. On power-up, if battery voltage is greater than VRCH threshold, a battery detect routine is run to determine if a battery is present. The battery detect routine will be disabled while the IC is in TTDM or has a TS fault. See Figure 28 for the Battery Detect Flow Diagram.
PAGE 26
bq24050 bq24052 bq24055 SLUS940B – SEPTEMBER 2009 – REVISED JUNE 2012 www.ti.com Start BATT_DETECT Start 25ms timer Timer Expired? No Yes Is VOUTVREG-300mV? Battery Present Turn off Sink Current Return to flow No Battery Absent Don’t Signal Charge Turn off Sink Current Return to Flow Figure 28.
PAGE 27
bq24050 bq24052 bq24055 www.ti.com SLUS940B – SEPTEMBER 2009 – REVISED JUNE 2012 bq2405x CHARGER APPLICATION DESIGN EXAMPLE bq24050/2 Adaptor 1 DC+ IN OUT System Load 10 1.
PAGE 28
bq24050 bq24052 bq24055 SLUS940B – SEPTEMBER 2009 – REVISED JUNE 2012 www.ti.com Processor Monitoring: Connect a pull-up resistor between the processor’s power rail and the CHG pin. Connect a pull-up resistor between the processor’s power rail and the PG pin. SELECTING IN AND OUT PIN CAPACITORS In most applications, all that is needed is a high-frequency decoupling capacitor (ceramic) on the power pin, input and output pins. Using the values shown on the application diagram, is recommended.
PAGE 29
bq24050 bq24052 bq24055 www.ti.com SLUS940B – SEPTEMBER 2009 – REVISED JUNE 2012 Layout Tips To obtain optimal performance, the decoupling capacitor from IN to GND (thermal pad) and the output filter capacitors from OUT to GND (thermal pad) should be placed as close as possible to the bq2405x, with short trace runs to both IN, OUT and GND (thermal pad). • All low-current GND connections should be kept separate from the high-current charge or discharge paths from the battery.
PAGE 30
PACKAGE OPTION ADDENDUM www.ti.
PAGE 31
PACKAGE OPTION ADDENDUM www.ti.com 28-Feb-2013 continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals. TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release.
PAGE 32
PACKAGE MATERIALS INFORMATION www.ti.com 4-Mar-2013 TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Package Pins Type Drawing BQ24050DSQR SON DSQ 10 SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant 3000 179.0 8.4 2.2 2.2 1.2 4.0 8.0 Q2 BQ24050DSQT SON DSQ 10 250 179.0 8.4 2.2 2.2 1.2 4.0 8.0 Q2 BQ24052DSQR SON DSQ 10 3000 179.0 8.4 2.2 2.2 1.2 4.0 8.0 Q2 BQ24052DSQT SON DSQ 10 250 179.
PAGE 33
PACKAGE MATERIALS INFORMATION www.ti.com 4-Mar-2013 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) BQ24050DSQR SON DSQ 10 3000 195.0 200.0 45.0 BQ24050DSQT SON DSQ 10 250 195.0 200.0 45.0 BQ24052DSQR SON DSQ 10 3000 195.0 200.0 45.0 BQ24052DSQT SON DSQ 10 250 195.0 200.0 45.0 BQ24055DSSR WSON DSS 12 3000 195.0 200.0 45.0 BQ24055DSST WSON DSS 12 250 195.0 200.0 45.
PAGE 34
PAGE 35
PAGE 36
PAGE 37
PAGE 38
PAGE 39
PAGE 40
IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, enhancements, improvements and other changes to its semiconductor products and services per JESD46, latest issue, and to discontinue any product or service per JESD48, latest issue. Buyers should obtain the latest relevant information before placing orders and should verify that such information is current and complete.