Datasheet

ManualsBrandsTEXAS INSTRUMENTS ManualsPMICsPMIC - battery management Charge management Li-Ion QFN 16 (3x3) Surface-mount

VSS

BAT

GND

Adaptor

bq24230

OUT

CHG

PGOOD

TMR

EN1

EN2

ILIM

ISET

TEMP

PACK+

PACK-

SYSTEM

1mF

4.7mF

1 kΩ

2.94 kΩ

1 kΩ

4.32 kΩ

4.7mF

bq24230

bq24232

www.ti.com

SLUS821E –OCTOBER 2008–REVISED JANUARY 2014

USB-FRIENDLY LITHIUM-ION BATTERY CHARGER AND POWER-PATH MANAGEMENT IC

Check for Samples: bq24230, bq24232

FEATURES

• Fully Compliant USB Charger

• Proprietary Start-Up Sequence Limits Inrush

Current

– Selectable 100-mA and 500-mA Maximum

Input Current • Status Indication – Charging/Done, Power

Good

– 100-mA Maximum Current Limit Ensures

Compliance to USB-IF Standard • Small 3 mm × 3 mm 16-Lead QFN Package

– Input-based Dynamic Power Management

APPLICATIONS

- DPM) for Protection Against Poor USB

Sources

• Bluetooth™ Devices

• 28-V Input Rating With Overvoltage Protection

• Low-Power Handheld Devices

• Integrated Dynamic Power-Path Management

Typical application Circuit

(DPPM) Function Simultaneously and

Independently Powers the System and

Charges the Battery

• Supports up to 500-mA Charge Current With

Current Monitoring Output (ISET)

• Programmable Input Current Limit up to

500 mA for Wall Adapters

• Programmable Termination Current (bq24232)

• Programmable Precharge and Fast-Charge

Safety Timers

• Reverse Current, Short-Circuit, and Thermal

Protection

• NTC Thermistor Input

DESCRIPTION

The bq2423x series of devices are highly integrated Li-ion linear chargers and system power-path management

devices targeted at space-limited portable applications. The devices operate from either a USB port or ac

adapter and support charge currents between 25 mA and 500 mA. The high-input-voltage range with input

overvoltage protection supports low-cost, unregulated adapters. The USB input current limit accuracy and start-

up sequence allow the bq2423x to meet USB-IF inrush current specification. Additionally, the input dynamic

power management (V

-DPM) prevents the charger from crashing poorly designed or incorrectly configured USB

sources.

The bq2423x features dynamic power-path management (DPPM) that powers the system while simultaneously

and independently charging the battery. The DPPM circuit reduces the charge current when the input current

limit causes the system output to fall to the DPPM threshold, thus supplying the system load at all times while

monitoring the charge current separately. This feature reduces the number of charge and discharge cycles on

the battery, allows for proper charge termination, and enables the system to run with a defective or absent

battery pack. Additionally, this enables instant system turn-on even with a totally discharged battery. The power-

path management architecture also permits the battery to supplement the system current requirements when the

adapter cannot deliver the peak system currents, enabling the use of a smaller adapter.

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.

2Bluetooth is a trademark of Bluetooth SIG, Inc..

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 (36 pages)

PAGE 1
bq24230 bq24232 www.ti.com SLUS821E – OCTOBER 2008 – REVISED JANUARY 2014 USB-FRIENDLY LITHIUM-ION BATTERY CHARGER AND POWER-PATH MANAGEMENT IC Check for Samples: bq24230, bq24232 FEATURES 1 Bluetooth™ Devices Low-Power Handheld Devices Typical application Circuit 1 kΩ 9 CHG IN 7 Adaptor PGOOD 1 kΩ 13 DC SYSTEM OUT 10 11 1mF GND 4.7mF 8 VSS 15 TD bq24230 EN2 5 BAT 2 3 4.
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bq24230 bq24232 SLUS821E – OCTOBER 2008 – REVISED JANUARY 2014 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 (CONTINUED) The battery is charged in three phases: conditioning, constant current, and constant voltage.
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bq24230 bq24232 www.ti.com SLUS821E – OCTOBER 2008 – REVISED JANUARY 2014 Recommended Operating Conditions MIN MAX 4.35 26 V '230 4.35 6.4 V '232 4.35 10.2 IN voltage range VI IN operating voltage range UNIT IIN Input current, IN pin 500 mA IOUT Current, OUT pin 1500 mA IBAT Current, BAT pin (discharging) 1500 mA ICHG Current, BAT pin (charging) 500 mA TJ Junction temperature –40 125 °C RILIM Maximum input current programming resistor 3.1 7.
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bq24230 bq24232 SLUS821E – OCTOBER 2008 – REVISED JANUARY 2014 www.ti.com Electrical Characteristics (continued) over operating free-air temperature range (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT 4.35 4.50 4.63 V VO(REG) – 180 mV VO(REG) – 100 mV VO(REG) – 30 mV V VIN-DPM Input voltage threshold when input current is reduced VDPPM Output voltage threshold when charging current is reduced VBSUP1 Enter battery supplement mode VBAT = 3.6 V, RILIM = 1.
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bq24230 bq24232 www.ti.com SLUS821E – OCTOBER 2008 – REVISED JANUARY 2014 Electrical Characteristics (continued) over operating free-air temperature range (unless otherwise noted) PARAMETER TEST CONDITIONS tDGL(RCH) Deglitch time, recharge threshold detected tDGL(NO-IN) Delay time, input power loss to charger turnoff VBAT = 3.6 V. Time measured from VIN: 5 V → 3 V 1-μs fall time IBAT(DET) Sink current for battery detection VBAT=2.
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bq24230 bq24232 SLUS821E – OCTOBER 2008 – REVISED JANUARY 2014 www.ti.
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bq24230 bq24232 www.ti.com SLUS821E – OCTOBER 2008 – REVISED JANUARY 2014 Terminal Functions (continued) TERMINAL NAME NUMBER '230 Thermal Pad I/O DESCRIPTION – An internal electrical connection exists 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. The VSS pin must be connected to ground at all times.
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bq24230 bq24232 SLUS821E – OCTOBER 2008 – REVISED JANUARY 2014 www.ti.com Simplified Block Diagram 250 mV VO (SC1) VBAT OUT- SC1 tDGL(SC2) OUT- SC 2 Q1 IN OUT EN2 Short Detect 225 mV Precharge 2. 25 .
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bq24230 bq24232 www.ti.com SLUS821E – OCTOBER 2008 – REVISED JANUARY 2014 Typical Characteristics Typical Application Circuit, EN1=0, EN2=1, TA=25°C, unless otherwise noted. ADAPTER PLUG-IN WITH BATTERY CONNECTED RLOAD = 25Ω VIN 5 V/div VOUT 4.
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bq24230 bq24232 SLUS821E – OCTOBER 2008 – REVISED JANUARY 2014 www.ti.com Typical Characteristics (continued) Typical Application Circuit, EN1=0, EN2=1, TA=25°C, unless otherwise noted. DROPOUT VOLTAGE vs TEMPERATURE OUTPUT REGULATION VOLTAGE vs TEMPERATURE 60 4.45 4.210 VIN = 5 V, IL = 500 mA IL = 500 mA 40 VBAT = 3 V 30 VBAT = 3.9 V 20 4.40 4.38 4.35 4.33 10 4.30 0 0 50 75 100 25 TJ - Junction Temperature - °C 125 0 25 50 75 100 125 4.205 4.200 4.195 4.190 4.185 4.
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bq24230 bq24232 www.ti.com SLUS821E – OCTOBER 2008 – REVISED JANUARY 2014 Application Circuits VIN = VUVLO to VOVP , IFASTCHG = 200 mA, IIN(MAX) = 500 mA, Battery Temperature Charge Range 0°C to 50°C, 6.25-hour Fast Charge Safety Timer. R4 1.5 kΩ R5 1.5 kΩ DC+ IN C HG Adaptor PGOOD SYSTEM OUT C1 1μF GND C2 4.7μF VSS bq24230 HOST EN2 EN1 TS TD CE BAT TEMP PACK+ PACK - C3 4.7μF R1 56.2 kΩ R2 2.94 kΩ R3 4.35 kΩ Figure 18.
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bq24230 bq24232 SLUS821E – OCTOBER 2008 – REVISED JANUARY 2014 www.ti.com VIN = VUVLO to VOVP , IFASTCHG = 200 mA, IIN(MAX) = 500 mA, 25-mA Termination Current, ISET mode (EN1=0, EN2=1), Battery Temperature Charge Range 0°C to 50°C, 6.25-hour Fast Charge Safety Timer. R5 1.5 kΩ R6 1.5 kΩ Adaptor DC+ IN CH G PGOOD SYSTEM OUT C1 1 μF GND C2 4.7μF VSS bq 24232 EN 2 EN 1 TS CE BAT PACK - R1 3.57 kΩ IS E T IT E R M TEMP TMR C3 4.7 μF IL IM PACK + R2 2.94 kΩ R4 56 .2 kΩ R3 4 .
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bq24230 bq24232 www.ti.com SLUS821E – OCTOBER 2008 – REVISED JANUARY 2014 Explanation of Deglitch Times and Comparator Hysteresis Figures not to scale VOVP VOVP - Vhys(OVP) VIN Typical Input Voltage Operating Range t < tDGL(OVP) VBAT + VIN(DT) VBAT + VIN(DT) - Vhys(INDT) UVLO UVLO - Vhys(UVLO) PGOOD tDGL(PGOOD) tDGL(OVP) tDGL(NO-IN) tDGL(PGOOD) Figure 20.
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bq24230 bq24232 SLUS821E – OCTOBER 2008 – REVISED JANUARY 2014 www.ti.com Turn Q2 OFF Force Q2 ON tREC(SC2) Turn Q2 OFF tREC(SC2) Force Q2 ON VBAT - VOUT Recover VO(SC2) t < tDGL(SC2) tDGL(SC2) tDGL(SC2) t < tDGL(SC2) Figure 23. OUT Short-Circuit – Supplement Mode VCOLD VCOLD - Vhys(COLD) t < tDGL(TS) Suspend Charging tDGL(TS) VTS Resume Charging VHOT - Vhys(HOT) VHOT Figure 24. Battery Pack Temperature Sensing – TS Pin.
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bq24230 bq24232 www.ti.com SLUS821E – OCTOBER 2008 – REVISED JANUARY 2014 Undervoltage Lockout The bq2423x family remains in power-down mode when the input voltage at the IN pin is below the undervoltage lockout (UVLO) threshold. During the power-down mode, the host commands at the control inputs (CE, EN1 and EN2) are ignored. The Q1 FET connected between IN and OUT pins is off, and the status outputs CHG and PGOOD are high impedance. The Q2 FET that connects BAT to OUT is ON.
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bq24230 bq24232 SLUS821E – OCTOBER 2008 – REVISED JANUARY 2014 www.ti.com Begin Startup I IN (MAX) 100 mA PGOOD = Hi -Z CHG = Hi -Z BATTFET ON V OUT short ? V UVLOV BAT+V IN(DT) Yes No No Yes Input Current Limit set by EN 1 and EN2 PGOOD = Low Yes EN 1= EN 2 =1 No CE = Low No Yes Yes ILIM or ISET short ? Begin Charging No Figure 25. Start-up Flow Diagram Power-Path Management The bq2423x features an OUT output that powers the external load connected to the battery.
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bq24230 bq24232 SLUS821E – OCTOBER 2008 – REVISED JANUARY 2014 USB100 Current Limit www.ti.com 50 μC 20 mA/div 10 μC 100 μs/div Figure 26. USB-IF Inrush Current Test The input current limit selection is controlled by the state of the EN1 and EN2 pins as shown in Table 1.
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bq24230 bq24232 SLUS821E – OCTOBER 2008 – REVISED JANUARY 2014 www.ti.com IOUT 500 mA 400 mA 250 mA 0 mA IIN 400 mA 150 mA 0 mA IBAT 150 mA 0 mA -100 mA 4 .4 V 4 .3 V DPM loop active VOUT ~ 3 .6 V Supplement Mode Figure 27. bq2423x DPPM and Battery Supplement Modes (VOREG = 4.4 V, VBAT = 3.6 V, ILIM=400 mA, ICHG = 150 mA) Input Source Not Connected When no source is connected to the IN input, OUT is powered strictly from the battery.
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bq24230 bq24232 www.ti.com SLUS821E – OCTOBER 2008 – REVISED JANUARY 2014 PRECHARGE CC FAST CHARGE CV TAPER DONE VBAT(REG) IO(CHG) Battery Current Battery Voltage VLOWV CHG = Hi-z I(PRECHG) I(TERM) Figure 28. In the precharge phase, the battery is charged with the precharge current (IPRECHG). Once the battery voltage crosses the VLOWV threshold, the battery is charged with the fast-charge current (ICHG).
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bq24230 bq24232 SLUS821E – OCTOBER 2008 – REVISED JANUARY 2014 www.ti.
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bq24230 bq24232 www.ti.com SLUS821E – OCTOBER 2008 – REVISED JANUARY 2014 Battery Detection And Recharge The bq2423x automatically detects if a battery is connected or removed. Once a charge cycle is complete, the battery voltage is monitored. When the battery voltage falls below VRCH, the battery detection routine is run. The detection routine first applies IBAT(DET) for tDET to see if VBAT drops below VLOWV. If not, it indicates that the battery is still connected, but has discharged.
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bq24230 bq24232 SLUS821E – OCTOBER 2008 – REVISED JANUARY 2014 www.ti.com Status Indicators (PGOOD, CHG) The bq2423x contains two open-drain outputs that signal its status. The PGOOD output signals when a valid input source is connected. PGOOD is low when (VBAT + VIN(DT)) < VIN < VOVP. When the input voltage is outside of this range, PGOOD is high impedance. The CHG output signals when a new charge cycle is initiated.
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bq24230 bq24232 www.ti.com SLUS821E – OCTOBER 2008 – REVISED JANUARY 2014 PRECHARGE THERMAL REGULATION CC FAST CHARGE CV TAPER DONE VO(REG) IO(CHG) Battery Voltage Battery Current V(LOWV) HI-z I(PRECHG) I(TERM) TJ(REG) IC Junction Temperature, TJ Figure 30. Battery Pack Temperature Monitoring The bq2423x features an external battery pack temperature monitoring input.
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bq24230 bq24232 SLUS821E – OCTOBER 2008 – REVISED JANUARY 2014 www.ti.com The allowed temperature range for a 103AT-2 type thermistor is 0°C to 50°C. However, the user can increase the range by adding two external resistors. See Figure 31 for the circuit.
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bq24230 bq24232 www.ti.com SLUS821E – OCTOBER 2008 – REVISED JANUARY 2014 APPLICATIONS INFORMATION bq24232 Charger Design Example See Figure 18 for the Design Example Schematic. Requirements • • • • • • Supply voltage = 5 V Fast-charge current of approximately 200 mA; ISET - pin 16 Input Current Limit =500 mA; ILIM - pin 12 Termination Current = 25 mA - pin 15 Safety timer duration, Fast charge = 6.
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bq24230 bq24232 SLUS821E – OCTOBER 2008 – REVISED JANUARY 2014 www.ti.com CHG and PGOOD LED Status: connect a 1.5-kΩ resistor in series with a LED between OUT and CHG and OUT and PGOOD. Processor Monitoring Status: connect a pullup resistor (approximately 100 kΩ) between the processor’s power rail and CHG and PGOOD. Selecting IN, OUT, And BAT Pin Capacitors In most applications, all that is needed is a high-frequency decoupling capacitor (ceramic) on the power pin, input, output, and battery pins.
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bq24230 bq24232 www.ti.com SLUS821E – OCTOBER 2008 – REVISED JANUARY 2014 Half-Wave Adapters Some low-cost adapters implement a half rectifier topology, which causes the adapter output voltage to fall below the battery voltage during part of the cycle. To enable operation with low-cost adapters under those conditions, the bq2407x family keeps the charger on for at least 20 ms (typical) after the input power puts the part in sleep mode.
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bq24230 bq24232 SLUS821E – OCTOBER 2008 – REVISED JANUARY 2014 www.ti.com REVISION HISTORY Changes from Original (October 2008) to Revision A • Page Changed the second paragraph of the DESCRIPTION ....................................................................................................... 1 Changes from Revision A (December 2008) to Revision B Page • Changed ABSOLUTE MAXIMUM RATINGS IO, OUT From: 600 mA To: 1700 mA ............................................................
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE OPTION ADDENDUM www.ti.com 10-Jun-2014 (6) Lead/Ball Finish - Orderable Devices may have multiple material finish options. Finish options are separated by a vertical ruled line. Lead/Ball Finish values may wrap to two lines if the finish value exceeds the maximum column width. Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided.
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PACKAGE MATERIALS INFORMATION www.ti.com 15-Feb-2014 TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Package Pins Type Drawing BQ24230RGTR QFN RGT 16 SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant 3000 330.0 12.4 3.3 3.3 1.1 8.0 12.0 Q2 BQ24230RGTT QFN RGT 16 250 180.0 12.4 3.3 3.3 1.1 8.0 12.0 Q2 BQ24232RGTR QFN RGT 16 3000 330.0 12.4 3.3 3.3 1.1 8.0 12.
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PACKAGE MATERIALS INFORMATION www.ti.com 15-Feb-2014 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) BQ24230RGTR QFN RGT 16 3000 367.0 367.0 35.0 BQ24230RGTT QFN RGT 16 250 210.0 185.0 35.0 BQ24232RGTR QFN RGT 16 3000 367.0 367.0 35.0 BQ24232RGTT QFN RGT 16 250 210.0 185.0 35.
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