Datasheet

ManualsBrandsTEXAS INSTRUMENTS ManualsPMICsPMIC - battery management Charge management Li-Ion, Li-Po VQFN 24 (4x4) Surface-mount

OAS

(bq24610)

OFB

(bq24617)

QFN-24

TOP VIEW

24 23 22 21 20 19

7 8 9 10 11 12

ACN

ACP

ACDRV

STAT1

SRN

SRP

ISET2

ACSET

GND

REGN

TTC

STAT2

VREF

ISET1

VFB

VCC

BATDRV

BTST

HIDRV

LODRV

bq24610

bq24617

www.ti.com

SLUS892B –DECEMBER 2009–REVISED SEPTEMBER 2013

Stand-Alone Synchronous Switch-Mode Li-Ion or Li-Polymer Battery Charger with System

Power Selector and Low I

Check for Samples: bq24610, bq24617

FEATURES

• Energy Star Low Quiescent Current I

– < 15-µA Off-State Battery Discharge Current

• 600-kHz NMOS-NMOS Synchronous Buck

Converter

– < 1.5-mA Off-State Input Quiescent Current

• Stand-Alone Charger Support for Li-Ion or Li-

APPLICATIONS

Polymer

• 5-V–28-V VCC Input Operating Range and • Netbook, Mobile Internet Device and Ultra-

Supports 1–6 Battery Cells (bq24610) Mobile PC

• 5-V–24-V VCC Input Operating Range and • Personal Digital Assistants

Supports 1–5 Battery Cells (bq24617)

• Handheld Terminals

• Up to 10A Charge Current and Adapter Current

• Industrial and Medical Equipment

• High-Accuracy Voltage and Current Regulation

• Portable Equipment

– ±0.5% Charge Voltage Accuracy

DESCRIPTION

– ±3% Charge Current Accuracy

The bq24610/7 is a highly integrated Li-ion or Li-

– ±3% Adapter Current Accuracy

polymer switch-mode battery charge controller. It

• Integration

offers a constant-frequency synchronous switching

– Automatic System Power Selection From

PWM controller with high-accuracy charge-current

and voltage regulation, charge preconditioning,

Adapter or Battery

termination, adapter current regulation and charge

– Internal Loop Compensation

status monitoring.

– Internal Soft Start

The bq24610/7 charges the battery in three phases:

– Dynamic Power Management

preconditioning, constant current, and constant

• Safety Protection

voltage. Charge is terminated when the current

reaches a minimum user-selectable level. A

– Input Overvoltage Protection

programmable charge timer provides a safety

– Battery Thermistor Sense Hot/Cold Charge

backup. The bq24610/7 automatically restarts the

Suspend

charge cycle if the battery voltage falls below an

– Battery Detection

internal threshold, and enters a low-quiescent-current

sleep mode when the input voltage falls below the

– Reverse Protection Input FET

battery voltage.

– Programmable Safety Timer

– Charge Overcurrent Protection

PACKAGE AND PINOUT

– Battery Short Protection

– Battery Overvoltage Protection

– Thermal Shutdown

• Status Outputs

– Adapter Present

– Charger Operation Status

• Charge Enable Pin

• 6-V Gate Drive for Synchronous Buck

Converter

• 30-ns Driver Dead-Time and 99.5% Max.

Effective Duty Cycle

• 24-Pin, 4-mm × 4-mm QFN package

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 (37 pages)

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bq24610 bq24617 www.ti.
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bq24610 bq24617 SLUS892B – DECEMBER 2009 – REVISED SEPTEMBER 2013 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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bq24610 bq24617 www.ti.
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bq24610 bq24617 SLUS892B – DECEMBER 2009 – REVISED SEPTEMBER 2013 www.ti.com RECOMMENDED OPERATING CONDITIONS (continued) Maximum difference voltage ACP–ACN, SRP–SRN VALUE UNIT –0.2 to 0.
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bq24610 bq24617 www.ti.com SLUS892B – DECEMBER 2009 – REVISED SEPTEMBER 2013 ELECTRICAL CHARACTERISTICS (continued) 5 V ≤ VVCC ≤ 28 V, 0°C < TJ < 125°C, typical values are at TA = 25°C, with respect to GND (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT CHARGE TERMINATION Termination current set factor (amps of termination current per volt on ISET2 pin) KTERM Termination current accuracy RSENSE = 10 mΩ 1 A/V VITERM = 20 mV –4% 4% VITERM = 5 mV –25% 25% VITERM = 1.
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bq24610 bq24617 SLUS892B – DECEMBER 2009 – REVISED SEPTEMBER 2013 www.ti.com ELECTRICAL CHARACTERISTICS (continued) 5 V ≤ VVCC ≤ 28 V, 0°C < TJ < 125°C, typical values are at TA = 25°C, with respect to GND (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT 32.
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bq24610 bq24617 www.ti.com SLUS892B – DECEMBER 2009 – REVISED SEPTEMBER 2013 ELECTRICAL CHARACTERISTICS (continued) 5 V ≤ VVCC ≤ 28 V, 0°C < TJ < 125°C, typical values are at TA = 25°C, with respect to GND (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX 6 6.3 UNIT REGN REGULATOR VREGN_REG REGN regulator voltage VVCC > 10V, CE = HIGH, (0-40mA load) 5.
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bq24610 bq24617 SLUS892B – DECEMBER 2009 – REVISED SEPTEMBER 2013 www.ti.
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bq24610 bq24617 www.ti.com SLUS892B – DECEMBER 2009 – REVISED SEPTEMBER 2013 TYPICAL CHARACTERISTICS Table 1.
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bq24610 bq24617 www.ti.com 5 V/div PH HIDRV LODRV 1 A/div 5 V/div PH 2 A/div 5 V/div 20 V/div 20 V/div SLUS892B – DECEMBER 2009 – REVISED SEPTEMBER 2013 IL LODRV IL t − Time = 100 ns/div t − Time = 100 ns/div 10 V/div 2 A/div IIN PH ISYS LODRV 2 A/div 0.5 A/div 5 V/div Figure 7. Cycle-by-Cycle Synchronous to Nonsynchronous 2 A/div Figure 6. Continuous-Conduction-Mode Switching Waveforms IL IBAT t − Time = 200 μs/div t − Time = 400 ns/div Figure 9.
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bq24610 bq24617 www.ti.com SLUS892B – DECEMBER 2009 – REVISED SEPTEMBER 2013 10 V/div 98 96 94 Efficiency - % 92 LODRV 20 V/div 2 A/div 5 V/div PH 90 20 Vin, 4 cell 88 12 Vin, 2 cell 86 20 Vin, 3 cell IL 84 VBAT 12 Vin, 1 cell 82 t − Time = 10 μs/div 80 0 Figure 12. Battery-to-GND Short Transition 1 2 5 4 3 IBAT - Output Current - A 6 7 8 Figure 13.
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bq24610 bq24617 SLUS892B – DECEMBER 2009 – REVISED SEPTEMBER 2013 www.ti.com Pin Functions – 24-Pin QFN PIN NO. 12 FUNCTION DESCRIPTION NAME 1 ACN Adapter current-sense resistor, negative input. A 0.1-μF ceramic capacitor is placed from ACN to ACP to provide differential-mode filtering. An optional 0.1-μF ceramic capacitor is placed from the ACN pin to GND for common-mode filtering. 2 ACP Adapter current-sense resistor, positive input. A 0.
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bq24610 bq24617 www.ti.com SLUS892B – DECEMBER 2009 – REVISED SEPTEMBER 2013 BLOCK DIAGRAM bq24610/17 VREF VCC-6 V ACN ACN-6 V ACN-6 V LDO INTERNAL REFERENCE VREF 3.3 V LDO VCC - SRN+100 mV + VCC - VUVLO + ACN + VCC VCC SLEEP UVLO VCC VCC-6 V LDO SLEEP SRN+200 mV UVLO ACN-SRN - ACDRV SYSTEM POWER SELECTOR LOGIC VCC-6V ACN ACOV CE BATDRV 1M ACN-6V + 20X - V(ACP-ACN) + COMP ERROR AMPLIFIER ACN ACSET CE + 1V + - 2.
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bq24610 bq24617 SLUS892B – DECEMBER 2009 – REVISED SEPTEMBER 2013 www.ti.
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bq24610 bq24617 www.ti.com SLUS892B – DECEMBER 2009 – REVISED SEPTEMBER 2013 DETAILED DESCRIPTION Regulation Voltage VRECH Regulation Current Precharge Current Regulation Phase Fastcharge Current Regulation Phase Fastcharge Voltage Regulation Phase Termination Charge Current Charge Voltage VLOWV IPRECH & I TERM Precharge Fastcharge Safety Time Time Figure 16.
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bq24610 bq24617 SLUS892B – DECEMBER 2009 – REVISED SEPTEMBER 2013 www.ti.com Input Adapter Current Regulation The total input from an ac adapter or other dc source is a function of the system supply current and the battery charging current. System current normally fluctuates as portions of the systems are powered up or down. Without dynamic power management (DPM), the source must be able to supply the maximum system current and the maximum charger input current simultaneously.
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bq24610 bq24617 www.ti.com SLUS892B – DECEMBER 2009 – REVISED SEPTEMBER 2013 Power Up The bq24610/7 uses a SLEEP comparator to determine the source of power on the VCC pin, because VCC can be supplied either from the battery or the adapter. If the VCC voltage is greater than the SRN voltage, bq24610/7 enables the ACFET and disables BATFET. If all other conditions are met for charging, the bq24610/7 then attempts to charge the battery (See Enabling and Disabling Charging).
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bq24610 bq24617 SLUS892B – DECEMBER 2009 – REVISED SEPTEMBER 2013 www.ti.com Asymmetrical gate drive (fast turnoff and slow turnon) for the ACDRV and BATDRV drivers provides fast turnoff and slow turnon of the ACFET and BATFET to help the break-before-make logic and to allow a soft start at turnon of either FET. The soft-start time can be further increased by putting a capacitor from gate to source of the p-channel power MOSFETs.
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bq24610 bq24617 www.ti.com SLUS892B – DECEMBER 2009 – REVISED SEPTEMBER 2013 recharged and able to keep the high-side power MOSFET on during the next cycle. This is important for battery chargers, where unlike regular dc-dc converters, there is a battery load that maintains a voltage and can both source and sink current. The 80-ns low-side pulse pulls the PH node (connection between high and low-side MOSFET) down, allowing the bootstrap capacitor to recharge up to the REGN LDO value.
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bq24610 bq24617 SLUS892B – DECEMBER 2009 – REVISED SEPTEMBER 2013 www.ti.com Temperature Qualification The controller continuously monitors battery temperature by measuring the voltage between the TS pin and GND. A negative temperature coefficient thermistor (NTC) and an external voltage divider typically develop this voltage. The controller compares this voltage against its internal thresholds to determine if charging is allowed.
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bq24610 bq24617 www.ti.com SLUS892B – DECEMBER 2009 – REVISED SEPTEMBER 2013 For example, 103AT NTC thermistors are used to monitor the battery pack temperature. Select TCOLD = 0ºC and TCUT_OFF = 45ºC; then we get RT2 = 430 kΩ, RT1 = 9.31 kΩ. A small RC filter is suggested to use for system-level ESD protection. Timer Fault Recovery The bq24610/7 provides a recovery method to deal with timer fault conditions.
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bq24610 bq24617 SLUS892B – DECEMBER 2009 – REVISED SEPTEMBER 2013 www.ti.com Battery Detection For applications with removable battery packs, bq24610/7 provides a battery-absent detection scheme to reliably detect insertion or removal of battery packs.
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bq24610 bq24617 www.ti.com SLUS892B – DECEMBER 2009 – REVISED SEPTEMBER 2013 Battery not detected VREG VRECH (VWAKE) Battery inserted VLOWV Battery detected (VDISH) tWAKE tRECH_DEG tLOWV_DEG Figure 20. Battery Detect Timing Diagram Care must be taken that the total output capacitance at the battery node is not so large that the discharge current source cannot pull the voltage below the LOWV threshold during the 1-second discharge time.
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bq24610 bq24617 SLUS892B – DECEMBER 2009 – REVISED SEPTEMBER 2013 PART DESIGNATOR QTY www.ti.com DESCRIPTION C8, C9, C12, C13 4 Capacitor, ceramic, 10 µF, 35 V, 20%, X7R C4, C5 2 Capacitor, ceramic, 1 µF, 16 V, 10%, X7R C1, C3, C6, C11 4 Capacitor, ceramic, 0.1 µF, 16 V, 10%, X7R C2, C10 2 Capacitor, ceramic, 0.1 µF, 50 V, 10%, X7R C7 1 Capacitor, ceramic, 1 µF, 50 V, 10%, X7R C14, C15 (Optional) 2 Capacitor, ceramic, 0.1 µF, 50 V, 10%, X7R C16 1 Capacitor, ceramic, 2.
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bq24610 bq24617 www.ti.com SLUS892B – DECEMBER 2009 – REVISED SEPTEMBER 2013 APPLICATION INFORMATION Inductor Selection The bq24610/7 has 600-kHz switching frequency to allow the use of small inductor and capacitor values.
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bq24610 bq24617 SLUS892B – DECEMBER 2009 – REVISED SEPTEMBER 2013 www.ti.com Power MOSFETs Selection Two external N-channel MOSFETs are used for a synchronous switching battery charger. The gate drivers are internally integrated into the IC with 6 V of gate drive voltage. 30-V or higher-voltage rating MOSFETs are preferred for 20-V input voltage and 40-V or higher-rating MOSFETs are prefered for 20-V to 28-V input voltage.
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bq24610 bq24617 www.ti.com SLUS892B – DECEMBER 2009 – REVISED SEPTEMBER 2013 Input Filter Design During adapter hot plug-in, the parasitic inductance and input capacitor from the adapter cable form a secondorder system. The voltage spike at the VCC pin may be beyond the IC maximum voltage rating and damage the IC. The input filter must be carefully designed and tested to prevent an overvoltage event on the VCC pin.
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bq24610 bq24617 SLUS892B – DECEMBER 2009 – REVISED SEPTEMBER 2013 www.ti.com connection point. Or use a 0-Ω resistor to tie analog ground to power ground (thermal pad should tie to analog ground in this case). A star connection under the thermal pad is highly recommended. 8. It is critical that the exposed thermal pad on the back side of the IC package be soldered to the PCB ground. Ensure that there are sufficient thermal vias directly under the IC, connecting to the ground plane on the other layers. 9.
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bq24610 bq24617 www.ti.com SLUS892B – DECEMBER 2009 – REVISED SEPTEMBER 2013 REVISION HISTORY Changes from Revision Original (December 2009) to Revision A Page • Corrected equation for calculating RT2 .............................................................................................................................. 20 • Corrected equation for calculating ICOUT .............................................................................................................................
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE OPTION ADDENDUM www.ti.com 25-Sep-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 24-Sep-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 BQ24610RGER VQFN RGE 24 3000 330.0 12.4 4.25 4.25 1.15 8.0 12.0 Q2 BQ24610RGER VQFN RGE 24 3000 330.0 12.4 4.25 4.25 1.15 8.0 12.0 Q2 BQ24610RGET VQFN RGE 24 250 180.0 12.4 4.25 4.25 1.15 8.0 12.
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PACKAGE MATERIALS INFORMATION www.ti.com 24-Sep-2013 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) BQ24610RGER VQFN RGE 24 3000 367.0 367.0 35.0 BQ24610RGER VQFN RGE 24 3000 367.0 367.0 35.0 BQ24610RGET VQFN RGE 24 250 210.0 185.0 35.0 BQ24610RGET VQFN RGE 24 250 210.0 185.0 35.0 BQ24617RGER VQFN RGE 24 3000 367.0 367.0 35.0 BQ24617RGER VQFN RGE 24 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.