Datasheet

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BAT

OUT

bq24070/1

PACK+

PACK−

System

VDC

GND

AC Adapter

UDG−04082

40 mΩ

(2)

bq24070

bq24071

www.ti.com

SLUS694F –MARCH 2006–REVISED DECEMBER 2009

SINGLE-CHIP LI-ION CHARGE AND SYSTEM POWER-PATH MANAGEMENT IC

Check for Samples: bq24070, bq24071

FEATURES

DESCRIPTION

• Small 3,5 mm × 4,5 mm QFN Package

• Designed for Single-Cell Li-Ion- or

The bq24070 and bq24071 are highly integrated

Li-ion linear charger and system power-path

Li-Polymer-Based Portable Applications

management devices targeted at space-limited

• Integrated Dynamic Power-Path Management

portable applications. The bq24070/1 offer DC supply

(DPPM) Feature Allowing the AC Adapter to

(AC adapter) power-path management with

Simultaneously Power the System and Charge

autonomous power-source selection, power FETs

the Battery

and current sensors, high-accuracy current and

• Power Supplement Mode Allows Battery to

voltage regulation, charge status, and charge

termination, in a single monolithic device.

Supplement the AC Input Current

• Autonomous Power Source Selection (AC

The bq24070/1 power the system while

Adapter or BAT)

independently charging the battery. This feature

reduces the charge and discharge cycles on the

• Supports Up to 2 Amps Total Current

battery, allows for proper charge termination and

• Thermal Regulation for Charge Control

allows the system to run with an absent or defective

• Charge Status Outputs for LED or System

battery pack. This feature also allows for the system

Interface Indicates Charge and Fault

to instantaneously turn on from an external power

source in the case of a deeply discharged battery

Conditions

pack. The IC design is focused on supplying

• Reverse Current, Short-Circuit, and Thermal

continuous power to the system when available from

Protection

the AC adapter or battery sources.

• Power Good Status Outputs

• 4.4-V and 6-V Options for System Output

Regulation Voltage

APPLICATIONS

• Smart Phones and PDA

• MP3 Players

• Digital Cameras and Handheld Devices

• Internet Appliances

POWER FLOW DIAGRAM

(1) See Figure 2 and functional block diagram for more detailed feature information.

(2) P-FET back gate body diodes are disconnected to prevent body diode conduction.

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 (31 pages)

PAGE 1
bq24070 bq24071 www.ti.
PAGE 2
bq24070 bq24071 SLUS694F – MARCH 2006 – REVISED DECEMBER 2009 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.
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bq24070 bq24071 www.ti.com SLUS694F – MARCH 2006 – REVISED DECEMBER 2009 ABSOLUTE MAXIMUM RATINGS (1) over operating free-air temperature range (unless otherwise noted) bq24070/1 Input voltage Input voltage IN (DC voltage with respect to VSS) –0.3 V to 18 V BAT, CE, DPPM, PG, Mode, OUT, ISET1, ISET2, STAT1, STAT2, TS, (all DC voltages wrt VSS) –0.3 V to 7 V VREF (DC voltage wrt VSS) –0.3 V to VO(OUT) + 0.3 V TMR –0.3 V to VO + 0.3 V Input current 3.
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bq24070 bq24071 SLUS694F – MARCH 2006 – REVISED DECEMBER 2009 www.ti.com ELECTRICAL CHARACTERISTICS 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 INPUT BIAS CURRENTS ICC(SPLY) Active supply current, VCC VVCC > VVCC(min) 1 2 ICC(SLP) Sleep current (current into BAT pin) VIN < V(BAT) 2.
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bq24070 bq24071 www.ti.com SLUS694F – MARCH 2006 – REVISED DECEMBER 2009 ELECTRICAL CHARACTERISTICS (continued) over junction temperature range (0°C ≤ TJ ≤ 125°C) and the recommended supply voltage range (unless otherwise noted) PARAMETER V(SET) Battery charge current set voltage (6) K(SET) Charge current set factor, BAT MIN TYP MAX UNIT Voltage on ISET1, VVCC ≥ 4.35 V, VI(OUT)- VI(BAT) > V(DO-MAX), VI(BAT) > V(LOWV) TEST CONDITIONS 2.47 2.50 2.53 V 100 mA ≤ IO(BAT) ≤ 1.
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bq24070 bq24071 SLUS694F – MARCH 2006 – REVISED DECEMBER 2009 www.ti.com 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 0.975 1 1.025 V MODE INPUT VIL Low-level input voltage Falling Hi→Low; 280 K ± 10% applied when low. VIH High-level input voltage Input RMode sets external hysteresis IIL Low-level input current, Mode VIL + .01 VIL + .
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bq24070 bq24071 www.ti.com SLUS694F – MARCH 2006 – REVISED DECEMBER 2009 DEVICE INFORMATION GND VREF bq24070/1RHL RHL PACKAGE (TOP VIEW) GND STAT1 2 STAT2 3 18 PG IN 4 17 OUT BA T 5 16 OUT BA T 6 15 OUT ISET2 7 14 TMR MODE 8 13 DPPM 9 10 ISET1 CE 20 19 11 12 TS VSS 1 TERMINAL FUNCTIONS TERMINAL NAME NO. I/O DESCRIPTION IN 4 I Charge input voltage PG 18 O Power-good status output (open-drain) BAT 5, 6 I/O Battery input and output.
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bq24070 bq24071 SLUS694F – MARCH 2006 – REVISED DECEMBER 2009 www.ti.com FUNCTIONAL BLOCK DIAGRAM Short−Circuit Recovery 500 Ω BAT Short−Circuit Recovery 100 mA / 500 mA IN VO(OUT) OUT Q1 1 kΩ Fault Recovery 3.
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bq24070 bq24071 www.ti.com SLUS694F – MARCH 2006 – REVISED DECEMBER 2009 FUNCTIONAL DESCRIPTIONS SIGMA 4.44 VOUT, VAC = 5.5 V II = 100 A +3 Sigma 4.42 Voltage - V 4.4 Mean 4.38 4.36 -3 Sigma 4.34 4.32 -60 -40 -20 0 20 40 60 80 100 120 140 o T - Temperatures - C Figure 1. Typical OUT Voltage Regulation, bq24070 CHARGE CONTROL The bq24070/1 supports a precision Li-ion or Li-polymer charging system suitable for single-cell portable devices.
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bq24070 bq24071 SLUS694F – MARCH 2006 – REVISED DECEMBER 2009 www.ti.com bq24070/1 AC Adapter VDC GND 4 IN VREF 1 OUT 15 10 µF OUT 16 20 GND 14 TMR RTMR OUT 17 BAT 5 BAT 6 PACK+ STAT1 3 STAT2 19 GND Battery P ack + 1 µF 7 ISET2 2 System 10 µF PACK − TS 12 18 PG DPPM 13 9 CE ISET1 10 8 MODE TEMP RSET RDPPM VSS 11 Control and Status Signals UDG−04083 Figure 3.
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bq24070 bq24071 www.ti.
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bq24070 bq24071 SLUS694F – MARCH 2006 – REVISED DECEMBER 2009 www.ti.com Autonomous Power Source Selection, Mode Control Pin With the MODE input low, the bq24070/1 defaults to USB-mode charging, and the supply current is limited by the ISET2 pin (100 mA for ISET2 = Low, 500 mA for ISET2 = High). If an input source is not available, then the battery is selected as the source.
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bq24070 bq24071 www.ti.com SLUS694F – MARCH 2006 – REVISED DECEMBER 2009 its 1.75-A charge and the battery charge current is reduced from 1.25 A to 0.25 A. When the peak system load drops to 0.5 A, the charge current returns to 1 A and the output voltage returns to its normal value. 2. Using DPPM provides a power savings compared to configurations without DPPM. Without DPPM, if the system current plus charge current exceed the supply’s current limit, then the output is pulled down to the battery.
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bq24070 bq24071 SLUS694F – MARCH 2006 – REVISED DECEMBER 2009 www.ti.com SF is the scale factor as specified in the specification table. Feature Plots Figure 6 illustrates DPPM and battery supplement modes as the output current (IOUT) is increased; channel 1 (CH1) VAC = 5.4 V; channel 2 (CH2) VOUT; channel 3 (CH3) IOUT = 0 to 2.2 A to 0 A; channel 4 (CH4) VBAT = 3.5 V; I(PGM-CHG) = 1 A. In typical operation, bq24070/1 (VOUT = 4.4 Vreg), through an AC adaptor overload condition and recovery.
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bq24070 bq24071 www.ti.com SLUS694F – MARCH 2006 – REVISED DECEMBER 2009 Break Before Make VAC VUSB VOUT VBAT System Capacitance Powering System DPPM Mode USB is Charging System Capacitance Hi PSEL Low Figure 7. Toggle Mode Low Figure 8 illustrates when a battery is inserted for power up; channel 1 (CH1) VAC = 0 V; channel 2 (CH2) VUSB = 0 V; channel 3 (CH3) VOUT; output current, IOUT = 0.25 A for VOUT > 2 V; channel 4 (CH4) VBAT = 3.5 V; C(DPPM) = 0 pF.
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bq24070 bq24071 SLUS694F – MARCH 2006 – REVISED DECEMBER 2009 www.ti.com input current (0.2 A/div); Mode = Low; CE = High; ISET2 = High; VBAT = 3.85 V; V(DPPM) = 3.0 V (V(DPPM) × 1.15 < VBAT, otherwise DPPM mode increases time duration). When a USB source is applied (if AC is not present), the CE pin and ISET2 pin are ignored during the boot-up time and a maximum input current of 100 mA is made available to the OUT or BAT pins. After the boot-up time, the IC implements the CE and ISET2 pins as programmed.
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bq24070 bq24071 www.ti.com SLUS694F – MARCH 2006 – REVISED DECEMBER 2009 Battery Pre-Conditioning During a charge cycle, if the battery voltage is below the V(LOWV) threshold, the bq24070/1 applies a precharge current, IO(PRECHG), to the battery. This feature revives deeply discharged cells. The RSET resistor, connected between the ISET1 and VSS pins, determines the precharge rate. The V(PRECHG) and K(SET) parameters are specified in the specifications table.
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bq24070 bq24071 SLUS694F – MARCH 2006 – REVISED DECEMBER 2009 www.ti.com The battery supplement mode has no thermal protection. The Q2 FET continues to connect the battery to the output (system), if input power is not sufficient; however, a short-circuit protection circuit limits the battery discharge current such that the maximum power dissipation of the part is not exceeded under typical design conditions.
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bq24070 bq24071 www.ti.com SLUS694F – MARCH 2006 – REVISED DECEMBER 2009 The bq24070/1 enters the low-power standby mode if while input power is present, the CE input is low. In this suspend mode, internal power FET Q1 (see Figure 5) is turned off, the BAT input is used to power the system through the OUT pin. This feature is designed to limit the power drawn from the input supply (such as USB suspend mode).
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bq24070 bq24071 SLUS694F – MARCH 2006 – REVISED DECEMBER 2009 www.ti.com Short-Circuit Recovery The output can experience two types of short-circuit protection, one associated with the input and one with the battery. If the output drops below ~1 V, an input short-circuit condition is declared and the input FET, Q1 is turned off. To recover from this state, a 500-Ω pullup resistor from the input is applied (switched) to the output.
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bq24070 bq24071 www.ti.com SLUS694F – MARCH 2006 – REVISED DECEMBER 2009 APPLICATION INFORMATION Selecting the Input and Output Capacitors In most applications, all that is needed is a high-frequency decoupling capacitor on the input. A 0.1-μF ceramic capacitor, placed in close proximity to IN to VSS pins, works well. In some applications depending on the power supply characteristics and cable length, it may be necessary to add an additional 10-μF ceramic capacitor to the input.
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bq24070 bq24071 SLUS694F – MARCH 2006 – REVISED DECEMBER 2009 www.ti.com PCB Layout Considerations It is important to pay special attention to the PCB layout. The following provides some guidelines: • To obtain optimal performance, the decoupling capacitor from the input terminal to VSS and the output filter capacitor from OUT to VSS should be placed as close as possible to the bq24070/1, with short trace runs to both signal and VSS pins.
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bq24070 bq24071 www.ti.com SLUS694F – MARCH 2006 – REVISED DECEMBER 2009 Changes from Revision E (October 2009) to Revision F • Page Changed Charge Termination and Recharge description ..................................................................................................
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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 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 BQ24070RHLR VQFN RHL 20 3000 330.0 12.4 3.8 4.8 1.6 8.0 12.0 Q1 BQ24070RHLR VQFN RHL 20 3000 330.0 12.4 3.8 4.8 1.3 8.0 12.0 Q1 BQ24070RHLT VQFN RHL 20 250 180.0 12.4 3.8 4.8 1.3 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) BQ24070RHLR VQFN RHL 20 3000 367.0 367.0 35.0 BQ24070RHLR VQFN RHL 20 3000 370.0 355.0 55.0 BQ24070RHLT VQFN RHL 20 250 195.0 200.0 45.0 BQ24070RHLT VQFN RHL 20 250 210.0 185.0 35.0 BQ24071RHLR VQFN RHL 20 3000 367.0 367.0 35.0 BQ24071RHLT VQFN RHL 20 250 210.0 185.0 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.