Datasheet

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

Table Of Contents

www.ti.com

FEATURES DESCRIPTION

APPLICATIONS

TYPICAL APPLICATION

USB

VSS

STAT1

STAT2

ISET2

ISET1

bq25017RHL

PACK+

PACK−

VDC

GND

VBUS

GND

D+

D −

USBPort

AC Adapter

15CE

2FB

16BAT/OUT

SYSTEM

Battery

Pack

1.8V

17BAT/OUT

VSS

4 20FPWM

sim_app2a_lus721

SET

14PG

10 μF

10 Hμ

1 μF

10 μF

bq25015

bq25017

SLUS721A – DECEMBER 2006 – REVISED MARCH 2007

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

• Li-Ion Or Li-Pol Charge Management and

The bq25015/7 are highly integrated charge and

Synchronous DC-DC Power Conversion In a

power management devices targeted at

Single Chip

space-limited bluetooth applications. The bq25015/7

devices offer integrated power FET and current

• Charges and Powers the System from Either

sensor for charge control, reverse blocking

the AC Adapter or USB with Autonomous

protection, high accuracy current and voltage

Power Source Selection

regulation, charge status, charge termination, and a

• Integrated USB Charge Control with

highly efficient and low-power dc-dc converter in a

Selectable 100 mA and 500 mA Charge Rates

small package.

• Integrated Power FET and Current Sensor for

The bq25015/7 devices charge the battery in three

Up to 500 mA Charge Applications AND

phases: conditioning, constant current and constant

300 mA DC-DC Controller with Integrated

voltage. Charge is terminated based on minimum

FETs

current. An internal charge timer provides a backup

safety feature for charge termination. The bq25015/7

• Reverse Leakage Protection Prevents Battery

automatically re-starts the charge if the battery

Drainage

voltage falls below an internal threshold. The

• Automatic Power Save Mode For High

bq25015/7 automatically enters sleep mode when

Efficiency at Low Current, or Forced PWM for

supply is removed.

Frequency Sensitive Applications

The integrated low-power high-efficiency dc-dc

converter is designed to operate directly from a

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

• MP3 Players

voltage is either adjustable from 0.7 V to VBAT, or

• PDAs, Smartphones

fixed at 1.8 V (bq25017) and is capable of delivering

up to 300-mA of load current. The dc-dc converter

• Digital Cameras

operates at a synchronized 1 MHz switching

frequency allowing for the use of small inductors.

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 (28 pages)

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bq25015 bq25017 www.ti.
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bq25015 bq25017 www.ti.com SLUS721A – DECEMBER 2006 – REVISED MARCH 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 OUTPUT VOLTAGE (V) PART NUMBER (2) (3) STATUS PACKAGE MARKING Adjustable bq25015RHLR Production BZL Adjustable bq25015RHLT Production BZL 1.8 V bq25017RHLR Production BZM 1.
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bq25015 bq25017 www.ti.
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bq25015 bq25017 www.ti.com SLUS721A – DECEMBER 2006 – REVISED MARCH 2007 ELECTRICAL CHARACTERISTICS (continued) over operating temperature range (TA = 0°C to 125°C) and recommended supply voltage range (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP 375 tTPRDET_DG Deglitch time for taper detection VVCC(min)≥ 4.5 V, tFALL = 100 ns, 10 mV overdrive, ICHG increasing above or decreasong below threshold 250 tTERMDET_DG Deglitch time for termination detection VVCC(min)≥ 4.
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bq25015 bq25017 www.ti.com SLUS721A – DECEMBER 2006 – REVISED MARCH 2007 ELECTRICAL CHARACTERISTICS (continued) over operating temperature range (TA = 0°C to 125°C) and recommended supply voltage range (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT FPWM – bq25015 VIH(FPWM) High-level input voltage VIL(FPWM) Low-level input voltage 2.0 0.4 FPWM – bq25017 VIH(FPWM) High-level input voltage VIL(FPWM) Low-level input voltage IFPWM Input bias current 1.3 V 0.
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bq25015 bq25017 www.ti.com SLUS721A – DECEMBER 2006 – REVISED MARCH 2007 TYPICAL OPERATING CHARACTERISTICS EFFICIENCY vs LOAD CURRENT EFFICIENCY vs LOAD CURRENT 100 100 Vbat = 2.7 V 95 90 85 Vbat = 4.2 V 75 70 75 70 65 60 60 VO = 1.8 V, FPWM = High 55 50 100 150 200 250 IL - Load Current - mA VO = 1.8 V, FPWM = Low 55 50 50 300 0 50 Figure 2. EFFICIENCY vs LOAD CURRENT EFFICIENCY vs LOAD CURRENT 300 100 Vbat = 2.7 V 95 Vbat = 2.7 V 95 90 90 85 85 Efficiency - % Vbat = 3.
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bq25015 bq25017 www.ti.com SLUS721A – DECEMBER 2006 – REVISED MARCH 2007 TYPICAL OPERATING CHARACTERISTICS (continued) LOAD TRANSIENT, 3 mA TO 300 mA, Vbat = 3.7 V, Vo = 1.8 V FPWM = HIGH, FORCE PWM LOAD TRANSIENT, 3 mA TO 300 mA, Vbat = 3.7 V, Vo = 1.8 V FPWM = LOW, POWER SAVE MODE Figure 6. Figure 7. LIGHT LOAD WAVEFORM, Vbat = 3.7 V, Vo = 1.8 V LOAD CURRENT = 36 mA, FPWM = HIGH, FORCE PWM LIGHT LOAD WAVEFORM, Vbat = 3.7 V, Vo = 1.8 V LOAD CURRENT = 36 mA, FPWM = LOW, FORCE PWM Figure 8. Figure 9.
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bq25015 bq25017 www.ti.
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bq25015 bq25017 www.ti.
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bq25015 bq25017 www.ti.com SLUS721A – DECEMBER 2006 – REVISED MARCH 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 12 through Figure 14 respectively. Figure 13 is the typical application circuit for a high-current application (300 mA).
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bq25015 bq25017 www.ti.
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bq25015 bq25017 www.ti.com SLUS721A – DECEMBER 2006 – REVISED MARCH 2007 FUNCTIONAL DESCRIPTIONS (continued) Autononous Power Source Selection As default, the bq25015/7 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 15 for details. AC > BATTERY USB MODE AC MODE AC < BATTERY USB > BATTERY Figure 15.
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bq25015 bq25017 www.ti.com SLUS721A – DECEMBER 2006 – REVISED MARCH 2007 FUNCTIONAL DESCRIPTIONS (continued) The bq25015/7 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 bq25015/7 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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bq25015 bq25017 www.ti.com SLUS721A – DECEMBER 2006 – REVISED MARCH 2007 Thermal Shutdown and Protection The bq25015/7 monitors the junction temperature, TJ, of the die and suspends charging if TJ exceeds T(SHTDWN). Charging resumes when TJ falls below T(SHTDWN) by approximately 15°C. TImer Fault Recovery As shown in Figure 14, bq25015/7 provides a recovery method to deal with timer fault conditions.
PAGE 15
bq25015 bq25017 www.ti.com SLUS721A – DECEMBER 2006 – REVISED MARCH 2007 The N-channel rectifier is turned on and the inductor current ramps down. As the inductor current approaches zero the N-channel rectifier is turned off and the P-channel switch is turned on again starting the next pulse. The converter continues these pulses until the comp high threshold (set to typically 1.6% above VOUT nominal) is reached. The converter enters a sleep mode, reducing the quiescent current to a minimum.
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bq25015 bq25017 www.ti.com SLUS721A – DECEMBER 2006 – REVISED MARCH 2007 Enable Pulling the enable pin (EN) low forces the DC-DC converter into shutdown mode, with a shutdown quiescent current of typically 0.1 µA. In this mode the P-channel switch and N-channel rectifier are turned off, the internal resistor feedback divider is disconnected, and the converter enters shutdown mode.
PAGE 17
bq25015 bq25017 www.ti.com SLUS721A – DECEMBER 2006 – REVISED MARCH 2007 APPLICATION INFORMATION ADJUSTABLE OUTPUT VOLTAGE VERSION (bq25015) When the adjustable output voltage version is being used (bq25015), the output is set by the external resistor divider, as shown in Figure 13. 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 18
bq25015 bq25017 www.ti.com SLUS721A – DECEMBER 2006 – REVISED MARCH 2007 APPLICATION INFORMATION (continued) If ceramic output capacitors are used, the capacitor RMS ripple current rating ensures the application requirements. For completeness, the RMS ripple current is calculated as: I RMS + I OUT(max) Ǹ VOUT V IN ǒ 1* V OUT VIN Ǔ (11) The worst case RMS ripple current occurs at D=0.
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bq25015 bq25017 www.ti.com SLUS721A – DECEMBER 2006 – REVISED MARCH 2007 APPLICATION INFORMATION (continued) 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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bq25015 bq25017 www.ti.
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE OPTION ADDENDUM www.ti.com 27-Jul-2013 (5) Multiple Device Markings will be inside parentheses. Only one Device Marking contained in parentheses and separated by a "~" will appear on a device. If a line is indented then it is a continuation of the previous line and the two combined represent the entire Device Marking for that device. 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 27-Jul-2013 TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Package Pins Type Drawing BQ25015RHLR VQFN RHL 20 BQ25015RHLT VQFN RHL BQ25017RHLR VQFN RHL 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 3.8 4.8 1.6 8.0 12.0 Q1 20 250 180.0 12.4 3.8 4.8 1.6 8.0 12.0 Q1 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) BQ25015RHLR VQFN RHL 20 3000 367.0 367.0 35.0 BQ25015RHLT VQFN RHL 20 250 210.0 185.0 35.0 BQ25017RHLR VQFN RHL 20 3000 367.0 367.0 35.
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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.