BQ24140

Manufacturer Part NumberBQ24140
DescriptionThe bq24140 is a compact, flexible, high-efficiency, USB-friendly switch-mode charge management device for single-cell Li-ion and Li-polymer batteries used in a wide range of portable applications
ManufacturerTexas Instruments
BQ24140 datasheet
 


Specifications of BQ24140

# Series Cells1Charge Current(max)(a)1.5
Charge Status Outputs1Control TopologySwitch-Mode
Switching Frequency(khz)3000Switching Frequency(min)(khz)+/- 10% of 3Mhz
Primary Charge Termination MethodMin Charge CurrentPin/package30DSBGA
Vin(min)(v)4Vin(max)(v)9
Battery Charge Voltage(v)ProgrammableBattery Charge Voltage(min)(v)3.54
Battery Charge Voltage(max)(v)4.44Optional FunctionsDual Input, Simultaneous USB OTG & Chg
Operating Temperature Range(c)-40 to 85  
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Fully Integrated Dual-Input Switch-Mode One-Cell Li-Ion Charger with Full USB
FEATURES
1
High-Efficiency Mini-USB/AC Battery Charger
for Single-Cell Li-Ion and Li-Polymer Battery
Packs
Charge Battery and Provide USB-OTG Support
at the Same Time
High-Accuracy Voltage and Current Regulation
– Input Current Regulation Accuracy: ±5%
(100mA, 500mA)
– Charge Voltage Regulation Accuracy:
±0.5% (25°C), ±1% (0-125°C)
– Charge Current Regulation Accuracy: ±5%
Boost Mode Operation for USB OTG:
– Input Voltage Range (from Battery): 2.3V to
4.5V
– Output for VBUS: 5.05V/500 mA
Input Voltage Based Dynamic Power
Management Provides Protection Against
Current Limited Adapters
Bad Adaptor Detection and Rejection
Safety Limit Register for Added Security by
Limiting Maximum Charge Voltage and
Maximum Charge Current
20-V Absolute Maximum Input Voltage Rating
9.0-V Maximum Operating Input Voltage
Charge Faster than Linear Chargers
Built-in Input Current Sensing and Limiting
Integrated Power FETs for up to 1.5-A Charge
Rate
AC Adapter or
Wireless Power
USB Adapter
10 kW 10 kW 10 kW
10 kW
10 kW 10 kW
HOST
1
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.
Compliance and USB-OTG Support
Check for Samples:
bq24140
Programmable Charge Parameters Through
2
I
C Interface (up to 3.4 Mbps):
– Input Current
– Fast-Charge/Termination Current
– Charge Voltage (3.5-4.44V)
– Safety Timer with Reset Control
– Safety Timer with Reset Control
– Termination Enable
Synchronous Fixed-Frequency PWM
Controller Operating at 3 MHz With 0% to
99.5% Duty Cycle
Automatic High Impedance Mode for Low
Power Consumption
Robust Protection
– Reverse Leakage Protection Prevents
Battery Drainage
– Thermal Regulation and Protection
– Input/Output Over Voltage Protection
Status Output for Charging and Faults
USB Friendly Boot-Up Sequence
2.35 × 2.65 mm 30-pin WCSP Package
APPLICATIONS
Mobile Phones and Smart Phones
MP3 Players
Handheld Devices
4.7 F
m
4.7 F
m
PMID1
PMID2
1 H
m
SW1
VIN
100 nF
1 F
m
BOOT1
1 H
m
SW2
VBUS
4.7 F
m
100 nF
BOOT2
CSIN
SCL
SDA
STAT
VBAT
OTG
SLRST
DIS
VREF
1 F
m
GND
VREG
LED
0.1 F
m
bq24140
SLUSAO5 – OCTOBER 2011
68 mW
10 µF 47 µF
PACK+
+
PACK-
Copyright © 2011, Texas Instruments Incorporated

BQ24140 Summary of contents

  • Page 1

    ... VIN 100 BOOT1 SW2 VBUS 4 100 nF BOOT2 CSIN SCL SDA STAT VBAT OTG SLRST DIS VREF GND VREG LED 0 bq24140 SLUSAO5 – OCTOBER 2011 µF 47 µF PACK+ + PACK- Copyright © 2011, Texas Instruments Incorporated ...

  • Page 2

    ... 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 The bq24140 is a compact, flexible, high-efficiency, USB-friendly switch-mode charge management device for single-cell Li-ion and Li-polymer batteries used in a wide range of portable applications. The charge parameters can be programmed through an I MOSFETs, input current sensing, high-accuracy current and voltage regulation, and charge termination, into a small WCSP package ...

  • Page 3

    ... Duty cycle for output current should be less than 50% for 10- year life time when output current is above 1.25A (3) The human body model is a 100-pF capacitor discharged through a 1.5-kΩ resistor into each pin. Copyright © 2011, Texas Instruments Incorporated PIN FUNCTIONS (continued) DESCRIPTION (1) Product Folder Link(s): bq24140 bq24140 SLUSAO5 – OCTOBER 2011 2 C control VALUE UNIT MIN MAX – ...

  • Page 4

    ... VBUS > VSLP, LOWV VBAT OREG RSNS = 68 mΩ LOW_CHG = 0, Programmable V ≤ V < VBUS > VSLP, LOWV VBAT OREG RSNS=68 mΩ LOW_CHG=1 37.4 mV ≤ V IREG SNS Programmable Product Folder Link(s): bq24140 www.ti.com bq24140 WCSP PACKAGE UNITS 30 PINS 79.5 0.3 44.4 °C/W 0.3 44.4 n/a MIN NOM MAX UNIT (1) 4 (1) 4 – ...

  • Page 5

    ... VBAT FALL overdrive mA, sink current O Voltage on STAT pin is 5V ILED1 = L, ILED0 = L ILED1 = L, ILED0 = H ILED1 = H, ILED0 = L ILED1 = H, ILED0 = H VBAT = 2.5 V Product Folder Link(s): bq24140 bq24140 SLUSAO5 – OCTOBER 2011 = 25°C for typical values J MIN TYP MAX 30 100 0.4 1 mΩ, 50 400 , t ...

  • Page 6

    ... V to turn off charger during charge VBAT OREG Lower limit for V falling from above V VBAT OVP Charge mode operation V rising VBAT V ≤ V VBAT SHORT Product Folder Link(s): bq24140 www.ti.com = 25°C for typical values J MIN TYP MAX 0.4 0.4 1.2 1 3.4 -0.5 262 262 0 40 ...

  • Page 7

    ... No load at VBUS, power save mode boosting VBAT Charge current begins to taper down 32 second mode 15 minute mode I = 1mA, CREG = 0.1µF, VIN > V LOAD UVLO VREG = 0V Product Folder Link(s): bq24140 bq24140 SLUSAO5 – OCTOBER 2011 = 25°C for typical values J MIN TYP MAX UNIT 5.05 V -3% +3% 650 mA 1 ...

  • Page 8

    ... VIN 100 nF BOOT1 SW2 VBUS 100 nF BOOT2 CSIN SCL SDA STAT VBAT OTG SLRST VREF DIS GND LED VREG 0 Product Folder Link(s): bq24140 www.ti.com µF 47 µF PACK PACK Copyright © 2011, Texas Instruments Incorporated ...

  • Page 9

    ... Source IN PWM Charge TSHUT Charge Control, Timer and Display Logic BAT OVP Recharge Sleep V BUS Sleep V IN Termination Figure 2. bq24140 Block Diagram Product Folder Link(s): bq24140 bq24140 SLUSAO5 – OCTOBER 2011 SW2 SW2 Q3 SW1 SW1 PMID2 2.5V, 10mA (back VREG to back switches) ...

  • Page 10

    ... Figure 3. VBUS to VIN Charging – Default Mode C1:VIN, CH2: IVBUS, CH3: IVIN, CH4: VBUS Figure 4. VIN Charging and removed, switch to VBUS – Default Mode C1:VIN, CH2: IVBUS, CH3: IVIN, 10 Submit Documentation Feedback CH4: VBUS Copyright © 2011, Texas Instruments Incorporated Product Folder Link(s): bq24140 www.ti.com ...

  • Page 11

    ... Figure 5. VBUS Dynamic Power Management (DPM) – C1:VIN, CH2: IVBUS, CH3: VBUS, CH4: STAT Figure 6. VBUS Dynamic Power Management (DPM) – CH1:VIN, CH2: STAT, CH3: VBAT, CH4: IVIN Copyright © 2011, Texas Instruments Incorporated Product Folder Link(s): bq24140 bq24140 SLUSAO5 – OCTOBER 2011 Submit Documentation Feedback 11 ...

  • Page 12

    ... Figure 8. VBUS Efficiency versus Charge Current 12 Submit Documentation Feedback Efficiency 325 Efficiency 550 Efficiency 950 2.5 3 3.5 VBAT - Battery Voltage - V VBAT at 4.2 V VBAT VBAT VBAT at 2.5 V 0.2 0.4 0.6 0.8 ICHG - Charge Current - A Product Folder Link(s): bq24140 www.ti.com Efficiency 1250 4 4.5 VBAT at 3 1.2 1.4 Copyright © 2011, Texas Instruments Incorporated ...

  • Page 13

    ... Figure 10. VIN Efficiency versus Charge Current Copyright © 2011, Texas Instruments Incorporated Efficiency 325 Efficiency 550 Efficiency 1.55 2.5 3 3.5 4 VBAT - Battery Voltage - V VBAT at 4.2 V VBAT VBAT VBAT at 2.5 V 0.4 0.6 0.8 1 ICHG - Charge Current - A Product Folder Link(s): bq24140 bq24140 SLUSAO5 – OCTOBER 2011 4.5 5 VBAT at 3.6 V 1.2 1.4 1.6 Submit Documentation Feedback 13 ...

  • Page 14

    ... Figure 11. Charge Current Response – 550mA to 1.55A CH1: VIN, CH2: VBAT, CH3: IBAT, CH4: IVIN Figure 12. Input Current Regulation Response – 100mA to No Limit CH1: VIN, CH2: VBAT, CH3: IBAT, CH4: IVIN 14 Submit Documentation Feedback Copyright © 2011, Texas Instruments Incorporated Product Folder Link(s): bq24140 www.ti.com ...

  • Page 15

    ... Copyright © 2011, Texas Instruments Incorporated VIN = 5 V, VBAT = 3.6 V VIN = 5 V, VBAT = 3 V VBUS = 5 V, VBAT = 3.6 V VBUS = 5 V, VBAT = 4 V VBUS = 5 V, VBAT = Figure 14. VBUS OTG in PFM Mode Product Folder Link(s): bq24140 bq24140 SLUSAO5 – OCTOBER 2011 100 120 Submit Documentation Feedback 15 ...

  • Page 16

    ... The bq24140 integrates a dual input 3MHz synchronous switching charger that targets space limited portable applications powered by a single cell Li based battery pack. In addition to charge the battery, the bq24140 provides support for simultaneously boosting the battery voltage back to the USB input for USB-OTG support. ...

  • Page 17

    ... I bq24140 will regulate the input current and the charge current will be limited by the input current loop. The slew rate for fast charge current is controlled to minimize the current and voltage over-shoot during transient. Both the ...

  • Page 18

    ... The battery voltage falls below the V • VBUS or VIN Power-on reset (POR), if battery voltage is below the V • CE bit toggle or RESET bit is set (Host controlled) Figure 18 shows an operational flow chart of the bq24140 in charge mode. 18 Submit Documentation Feedback Fastcharge Phase Voltage Regulation Phase (PWM Charge) ...

  • Page 19

    ... Input Power POR? POWER UP When a power source is first connected to the bq24140, the IC will go to default mode for 15 minutes. In default mode, the bq24140 is configured with safe charging parameters for charge current, charge voltage and input current. Once a write event is done to the bq24140 through I then follow the parameters as they are written by the host. Copyright © ...

  • Page 20

    ... The state diagram below describes the operation HANDOFF Figure 19. Input power source selection in default mode In the case where the bq24140 is in host mode, power priority will be dictated by the Host by setting one input to high impedance and activating the other input using the HZ_MODE bit of the control register. 20 ...

  • Page 21

    ... Enable V Delay T INT 2s Figure 20. Bad Adaptor Detection , for a period of t DETECT DETECT . This function ensures that the charge parameters are INT Product Folder Link(s): bq24140 bq24140 SLUSAO5 – OCTOBER 2011 expired? IN DPM , then checks the battery voltage. If the Submit Documentation Feedback 21 ...

  • Page 22

    ... SLUSAO5 – OCTOBER 2011 Battery detection during power-up The bq24140 also has a unique battery detection scheme during the start up of the charger. At power up, if the timer is in 15-minute mode, bq24140 will start a 262ms timer when exiting from short circuit mode to PWM charge mode ...

  • Page 23

    ... VREG LDO The bq24140 includes a 2.6V LDO that can be used as an indication of the VIN input being connected. This LDO is active all the time when there is a power source connected to the VIN input. The current limit on the LDO guarantees up to 10mA ...

  • Page 24

    ... Battery Regulation Voltage (default 0) Battery Regulation Voltage (default 1) Battery Regulation Voltage (default 0) Active at High level, 0-Active at Low level (default 1) Enable OTG Pin, 0-Disable OTG pin (default 0) Product Folder Link(s): bq24140 www.ti.com Copyright © 2011, Texas Instruments Incorporated ...

  • Page 25

    ... Special charger voltage: 320 mV (default 1) Special charger voltage: 160 mV (default 0) Special charger voltage (default 0) Product Folder Link(s): bq24140 bq24140 SLUSAO5 – OCTOBER 2011 Submit Documentation Feedback 25 ...

  • Page 26

    ... LED On time 520ms 11 – LED Constant On 00 – LED Off time 390ms 01 – LED Off time 780ms 10 – LED Off time 1560ms (default) 11 – LED Off time 3120ms Product Folder Link(s): bq24140 www.ti.com Copyright © 2011, Texas Instruments Incorporated ...

  • Page 27

    ... Battery Regulation Voltage: 640 mV (default 0) Battery Regulation Voltage: 320 mV (default 0) Battery Regulation Voltage: 160 mV (default 0) Battery Regulation Voltage (default 0) Battery Regulation Voltage (default 1) Battery Regulation Voltage (default Product Folder Link(s): bq24140 bq24140 SLUSAO5 – OCTOBER 2011 Submit Documentation Feedback 27 ...

  • Page 28

    ... LOW level, 1—CD pin at HIGH level Special charger voltage: 320mV (default 1) Special charger voltage: 160mV (default 0) Special charger voltage: 80mV (default 0) Product Folder Link(s): bq24140 www.ti.com Copyright © 2011, Texas Instruments Incorporated ...

  • Page 29

    ... LED Constant On 00 – LED Off time 390 ms 01 – LED Off time 780 ms 10 – LED Off time 1560 ms (default) 11 – LED Off time 3120 ms Product Folder Link(s): bq24140 bq24140 SLUSAO5 – OCTOBER 2011 threshold (typ.2.05V) or SLRST (pin Submit Documentation Feedback 29 ...

  • Page 30

    ... Equation 2: I (mA) O(CHARGE 55mΩ (SNS) 989 495 247 124 680 , is approximately 40 kHz (20 kHz to 80 kHz and output capacitor, C OUT Product Folder Link(s): bq24140 www.ti.com SNS 1: I (mA) I (mA) (TERM) (TERM 68mΩ 100mΩ (SNS) (SNS) 200 136 100 ...

  • Page 31

    ... Copyright © 2011, Texas Instruments Incorporated POWER TOPOLOGIES SW Isns L1 Rsns bq2414x C4 PGND Product Folder Link(s): bq24140 bq24140 SLUSAO5 – OCTOBER 2011 Isys Ichg System + Load C3 BAT Submit Documentation Feedback 31 ...

  • Page 32

    ... No thermal regulation. Therefore, the system design should ensure the maximum junction temperature of the IC is below 125°C during normal operation. 32 Submit Documentation Feedback SW Isns L1 Rsns bq2414x C4 PGND Product Folder Link(s): bq24140 www.ti.com Isys Ichg System + Load C3 BAT Copyright © 2011, Texas Instruments Incorporated ...

  • Page 33

    ... Copyright © 2011, Texas Instruments Incorporated ) for the specified charge current ripple: OUT , the worst case is when battery voltage is as close as to half of the input 0.3 ´ Product Folder Link(s): bq24140 bq24140 SLUSAO5 – OCTOBER 2011 (4) (5) (6) (7) (8) Submit Documentation Feedback 33 ...

  • Page 34

    ... Submit Documentation Feedback Table 4. Inductor Part Numbers INDUCTANCE SIZE 2.5 x 2.0 mm 2.5 x 2.0 mm 2.5 x 2.0 mm 2 using 40 kHz as the resonant frequency: OUT - ´ ´ Product Folder Link(s): bq24140 www.ti.com MANUFACTURER Murata FDK TOKO Inter-Technical (9) (10) (11) (12) (13) Copyright © 2011, Texas Instruments Incorporated ...

  • Page 35

    ... Orderable Device (1) Package Type Package Status BQ24140YFFR ACTIVE DSBGA BQ24140YFFT ACTIVE DSBGA (1) The marketing status values are defined as follows: ACTIVE: Product device recommended for new designs. LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect. NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design. ...

  • Page 36

    ... TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Package Type Drawing BQ24140YFFR DSBGA YFF BQ24140YFFT DSBGA YFF PACKAGE MATERIALS INFORMATION Pins SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) 30 3000 180.0 8.4 2.4 30 250 180.0 8.4 2.4 Pack Materials-Page 1 22-Oct-2011 Pin1 ...

  • Page 37

    ... Device Package Type BQ24140YFFR DSBGA BQ24140YFFT DSBGA PACKAGE MATERIALS INFORMATION Package Drawing Pins SPQ Length (mm) YFF 30 3000 YFF 30 250 Pack Materials-Page 2 22-Oct-2011 Width (mm) Height (mm) 210.0 185.0 35.0 210.0 185.0 35.0 ...

  • Page 38

    X: Max = 2.645 mm, Min = 2.545 mm Y: Max = 2.345 mm, Min = 2.245 mm ...

  • Page 39

    ... Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications, enhancements, improvements, and other changes to its products and services at any time and to discontinue any product or service without notice. Customers should obtain the latest relevant information before placing orders and should verify that such information is current and complete. All products are sold subject to TI’ ...