Datasheet

ManualsBrandsTEXAS INSTRUMENTS ManualsPMICsPMIC - battery management Charge management Li-Ion, Li-Po VQFN 20 (3.5x4.5) Surface-mount

FEATURES

DESCRIPTION

APPLICATIONS

TYPICAL APPLICATION

USB

VSS

STAT1

STAT2

ISET2

ISET1

bq25012RHL

PACK+

PACK−

VDC

GND

VBUS

GND

D+

D −

USB Port

AC Adapter

15CE

2FB

16BAT/OUT

DSP

Processor

Bluetooth Chipset

Battery

Pack

1.8 V

17BAT/OUT

VSS

4 20FPWM

UDG−04070

SET

14PG

bq25010

bq25011

bq25012

SLUS615B – DECEMBER 2004 – REVISED JULY 2007

www.ti.com

SINGLE-CHIP CHARGER AND DC/DC CONVERTER IC FOR PORTABLE APPLICATIONS

(bq2501x)

• Li-Ion Or Li-Pol Charge Management and

Synchronous DC-DC Power Conversion In a

The bq2501x series are highly integrated charge and

Single Chip

power management devices targeted at space-limited

bluetooth applications. The bq2501x series offer

• Optimized for Powering Bluetooth™ Headsets

integrated power FET and current sensor for charge

and Accessories

control, reverse blocking protection, high accuracy

• Charges and Powers the System from Either

current and voltage regulation, charge status, charge

the AC Adapter or USB with Autonomous

termination, and a highly efficient and low-power

Power Source Selection

dc-dc converter in a small package.

• Integrated USB Charge Control with

The bq2501x charges the battery in three phases:

Selectable 100 mA and 500 mA Charge Rates

conditioning, constant current and constant voltage.

• Integrated Power FET and Current Sensor for

Charge is terminated based on minimum current. An

Up to 500 mA Charge Applications AND internal charge timer provides a backup safety feature

for charge termination. The bq2501x automatically

100 mA DC-DC Controller with Integrated

re-starts the charge if the battery voltage falls below

FETs

an internal threshold. The bq2501x automatically

• Reverse Leakage Protection Prevents Battery

enters sleep mode when V

supply is removed.

Drainage

The integrated low-power high-efficiency dc-dc

• Automatic Power Save Mode For High

converter is designed to operate directly from a

Efficiency at Low Current, or Forced PWM for

single-cell Li-Ion or Li-Pol battery pack. The output

Frequency Sensitive Applications

voltage is either adjustable from 0.7 V to VBAT

• 3.5 mm × 4.5 mm QFN Package

(bq25010), fixed at 3.3 V (bq25011), or fixed at 1.8 V

(bq25012), and is capable of delivering up to 150-mA

of load current. The dc-dc converter operates at a

synchronized 1 MHz switching frequency allowing for

• Bluetooth™ Headsets

the use of small inductors.

• Bluetooth™ Accessories

• Low-Power Handheld Devices

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.

2 Bluetooth is a trademark of Bluetooth SIG, Inc.

UNLESS OTHERWISE NOTED this document contains

PRODUCTION DATA information current as of publication date.

Products conform to specifications per the terms of Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.

Summary of content (27 pages)

PAGE 1
bq25010 bq25011 bq25012 www.ti.
PAGE 2
bq25010 bq25011 bq25012 www.ti.com SLUS615B – DECEMBER 2004 – REVISED JULY 2007 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. ORDERING INFORMATION (1) TA PART NUMBER (2) (3) PACKAGE MARKING Adjustable bq25010RHLR ANC 3.3 bq25011RHLR (4) ANE 1.
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bq25010 bq25011 bq25012 www.ti.
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bq25010 bq25011 bq25012 www.ti.com SLUS615B – DECEMBER 2004 – REVISED JULY 2007 ELECTRICAL CHARACTERISTICS (continued) over junction temperature range (0°C ≤ TJ ≤ 125°C) and the recommended supply voltage range (unless otherwise noted) PARAMETER TEST CONDITIONS tTPRDET_DG Deglitch time for taper detection VVCC(min) ≥ 4.5 V, tFALL = 100 ns, 10 mV overdrive, ICHG increasing above or decreasing below threshold tTERMDET_DG Deglitch time for termination detection VVCC(min) ≥ 4.
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bq25010 bq25011 bq25012 www.ti.com SLUS615B – DECEMBER 2004 – REVISED JULY 2007 ELECTRICAL CHARACTERISTICS (continued) over junction temperature range (0°C ≤ TJ ≤ 125°C) and the recommended supply voltage range (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT DC-DC INPUT/OUTPUT CURRENT V(BAT) Input voltage range UVLO Undervoltage lockout IOUT_L Maximum output current Input power absent V(LOWV) 4.2 Input power present V(UVLO) 4.
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bq25010 bq25011 bq25012 www.ti.com SLUS615B – DECEMBER 2004 – REVISED JULY 2007 TYPICAL OPERATING CHARACTERISTICS EFFICIENCY vs LOAD CURRENT 100 100 Forced PWM, VO = 1.8 V, TA = 22oC 95 90 EFFICIENCY vs LOAD CURRENT 95 Efficiency − % Efficiency − % Vbat = 3.6 V 80 Vbat = 4 V 75 70 85 80 60 60 55 55 20 30 40 50 60 70 80 90 100 Vbat = 4.1 V 70 65 50 Vbat = 3.7 V 75 65 10 Vbat = 2.7 V 90 85 0 Power Save Mode, VO = 1.8 V, TA = 27oC Vbat = 3.
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bq25010 bq25011 bq25012 www.ti.com SLUS615B – DECEMBER 2004 – REVISED JULY 2007 TERMINAL FUNCTIONS TERMINAL NAME NO. I/O DESCRIPTION AC 5 I BAT/OUT 16 I/O Charge input voltage from AC adapter BAT/OUT 17 I Battery input to DC-DC converter CE 15 I Charge enable input (active low) EN 4 I Enable input for DC-DC converter (active high) FB 2 I Feedback pin for DC-DC converter FPWM 20 I PWM control input for the DC-DC converter. A high on FPWM = forced PWM mode.
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bq25010 bq25011 bq25012 www.ti.
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bq25010 bq25011 bq25012 www.ti.com SLUS615B – DECEMBER 2004 – REVISED JULY 2007 FUNCTIONAL DESCRIPTIONS BATTERY CHARGER The bq2501x supports a precision Li-Ion or Li-Pol charging system suitable for single-cell battery packs and a low-power DC-DC converter for providing power to system processor. See a typical charge profile, application circuit and an operational flow chart in Figure 3 through Figure 5 respectively. Figure 3.
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bq25010 bq25011 bq25012 www.ti.
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bq25010 bq25011 bq25012 www.ti.com SLUS615B – DECEMBER 2004 – REVISED JULY 2007 Autonomous Power Source Selection As default, the bq2501x attempts to charge the battery from the AC input. If AC input is not present, the USB input is selected. If both inputs are available, the AC adapter has the priority. Refer to Figure 6 for details. AC > BATTERY USB MODE AC MODE AC < BATTERY USB > BATTERY Figure 6.
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bq25010 bq25011 bq25012 www.ti.com SLUS615B – DECEMBER 2004 – REVISED JULY 2007 I (TAPER) + V(TAPER) K(SET) RSET (3) The bq2501x resets the taper timer in the event that the charge current returns above the taper threshold, I(TAPER). In addition to the taper current detection, the bq2501x terminates charge in the event that the charge current falls below the I(TERM) threshold. This feature allows for quick recognition of a battery removal condition or insertion of a fully charged battery.
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bq25010 bq25011 bq25012 www.ti.com SLUS615B – DECEMBER 2004 – REVISED JULY 2007 CE Input (Charge Enable) The CE digital input is used to enable or disable the charge process. A low-level signal on this pin enables the charge and a high-level signal disables the charge and places the device into a low-power mode. A high-to-low transition on this pin also resets all timers and timer fault conditions. Note that this applies to both AC and USB charging.
PAGE 14
bq25010 bq25011 bq25012 www.ti.com SLUS615B – DECEMBER 2004 – REVISED JULY 2007 I SKIP + 66 mA ) VIN 160 W (5) During the power save mode, the output voltage is monitored with the comparator by the thresholds comp low and comp high. As the output voltage falls below the comp low threshold (set to typically 0.8% above VOUT nominal), the P-channel switch turns on. The P-channel switch is turned off as the peak switch current is reached.
PAGE 15
bq25010 bq25011 bq25012 www.ti.com SLUS615B – DECEMBER 2004 – REVISED JULY 2007 100% Duty Cycle Low Dropout Operation The bq2501x offers a low input-to-output voltage difference while still maintaining operation with the use of the 100% duty cycle mode. In this mode the P-channel switch is constantly turned on. This is particularly useful in battery-powered applications to achieve longest operation time by taking full advantage of the whole battery voltage range.
PAGE 16
bq25010 bq25011 bq25012 www.ti.com SLUS615B – DECEMBER 2004 – REVISED JULY 2007 APPLICATION INFORMATION ADJUSTABLE OUTPUT VOLTAGE VERSION (bq25010) When the adjustable output voltage version of the bq2501x is being used (bq25010), the output is set by the external resistor divider, as shown in Figure 4. The output voltage can be calculated as: V OUT + 0.5 V ǒ1 ) R1 Ǔ R2 (8) where R1 + R2 ≤ 1 MΩ Internal reference voltage VREF(typ) = 0.
PAGE 17
bq25010 bq25011 bq25012 www.ti.com I RMS + I OUT(max) SLUS615B – DECEMBER 2004 – REVISED JULY 2007 Ǹ VOUT V IN ǒ V 1 * OUT VIN Ǔ (11) The worst case RMS ripple current occurs at D = 0.5 and is calculated as: I I RMS + OUT 2 (12) Ceramic capacitors perform well because of the low ESR value, and they are less sensitive to voltage transients and spikes compared to tantalum capacitors. The input capacitor should be placed as close as possible to the BAT/OUT pin of the device for best performance.
PAGE 18
bq25010 bq25011 bq25012 www.ti.com SLUS615B – DECEMBER 2004 – REVISED JULY 2007 DC-DC CONVERTER OUTPUT INDUCTOR SELECTION For high efficiencies, the inductor should have a low dc resistance to minimize conduction losses. Although the inductor core material has less effect on efficiency than its dc resistance, an appropriate inductor core material must be used. The inductor value determines the inductor ripple current.
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bq25010 bq25011 bq25012 www.ti.
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE OPTION ADDENDUM www.ti.com 27-Jul-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.
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PACKAGE MATERIALS INFORMATION www.ti.com 27-Jul-2013 TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Package Pins Type Drawing SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant BQ25010RHLR VQFN RHL 20 3000 330.0 12.4 3.8 4.8 1.6 8.0 12.0 Q1 BQ25012RHLR VQFN RHL 20 3000 330.0 12.4 3.8 4.8 1.6 8.0 12.
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PACKAGE MATERIALS INFORMATION www.ti.com 27-Jul-2013 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) BQ25010RHLR VQFN RHL 20 3000 367.0 367.0 35.0 BQ25012RHLR VQFN RHL 20 3000 367.0 367.0 35.
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