|Category||Semiconductors => Power Management => Battery Management Products => Battery Fuel Gauge|
|Part family||BQ2050 Li-Ion Gas Gauge With 1-Wire (DQ) Interface And 5 LED Drivers|
|Description||Li-Ion Gas Gauge With 1-Wire (DQ) Interface And 5 LED Drivers 16-SOIC 0 to 70|
|Company||Texas Instruments, Inc.|
|Datasheet||Download BQ2050SN-D119 datasheet
|Pin nb||Package type||Ind std||JEDEC code||Package qty||Carrier||Device mark||Width (mm)||Length (mm)||Thick (mm)||Pitch (mm)|
|• Using the bq2050 to Monitor Lead-Acid Batteries | Doc|
Conservative and repeatable measurement of available capacity in Lithium Ion rechargeable batteries Designed for battery pack integration
The bq2050 Lithium Ion Power GaugeTM IC is intended for batterypack or in-system installation to maintain an accurate record of available battery capacity. The IC monitors a voltage drop across a sense resistor connected in series between the negative battery termina ou charge and discharge activity of the battery. Compensations for battery temperature and rate of charge or discharge are applied to the charge, discharge, and self-discharge calculations to provide available capacity information across a wide range of operating conditions. Battery capacity is automatically recalibrated, or "learned," in the course of a discharge cycle from full to empty. Nominal available capacity may be directly indicated using a fivesegment LED display. These segments are used to graphically indicate available capacity. The bq2050
supports a simple single-line bidirectional serial link to an external processor (common ground). The bq2050 outputs battery information in response to external commands over the serial link. The bq2050 may operate directly from one cell (VBAT > 3V). With the REF output and an external transistor, a simple, inexpensive regulator can be built for systems with more than one series cell. Internal registers include available capacity, temperature, scaled available energy, battery ID, battery status, and programming pin settings. To support subassembly testing, the outputs may also be controlled. The external processor may also overwrite some of the bq2050 power gauge data registers.
120µ A typical operating current Small size enables implementations in as little 1 2 square inch of PCBDisplay capacity via singlewire serial communication port or direct drive of LEDs
Measurements compensated for current and temperature Self-discharge compensation using internal temperature sensor 16-pin narrow SOIC
LCOM LED common output LED segment 1/ program 1 input LED segment 2/ program 2 input RBI SEG3/PROG3 LED segment 3/ program 3 input LED segment 4/ program 4 input LED segment 5/ program 5 input Program 6 input SB DISP SEG5/PROG5 PROG6 VCC VSS REF N/C DQ SEG2/PROG2 Voltage reference output No connect Serial communications input/output Register backup input Battery sense input Display control input Sense resistor input 3.06.5V System ground
LCOM LED common output Open-drain output switches VCC to source current for the LEDs. The switch is off during initialization to allow reading of the soft pull-up or pull-down program resistors. LCOM is also high impedance when the display is off. SEG1 SEG5 LED display segment outputs (dual function with PROG1PROG6) Each output may activate an LED to sink the current sourced from LCOM. PROG1 PROG2 Programmed full count selection inputs (dual function with SEG1SEG2) These three-level input pins define the programmed full count (PFC) thresholds described in Table PROG3 PROG4 Power gauge rate selection inputs (dual function with SEG3SEG4) These three-level input pins define the scale factor described in Table 2. PROG5 Self-discharge rate selection (dual function with SEG5) This three-level input pin defines the selfdischarge and battery compensation factors as shown in Table 1. PROG6 Capacity initialization selection This three-level pin defines the battery state of charge at reset as shown in Table 1. N/C No connect DQ RBI SB DISP SR Sense resistor input The voltage drop (VSR) across the sense resistor RS is monitored and integrated over time to interpret charge and discharge activity. The SR input is tied between the negative terminal of the battery and the sense resistor. VSR < VSS indicates discharge, and VSR > VSS indicates charge. The effective voltage drop, VSRO, as seen by the bq2050 is VSR + VOS. Display control input DISP high disables the LED display. DISP tied to VCC allows PROGX to connect directly to VCC or VSS instead of through a pull-up or pull-down resistor. DISP floating allows the LED display to be active during charge. DISP low activates the display. See Table 1. Secondary battery input This input monitors the battery cell voltage potential through a high-impedance resistive divider network for end-of-discharge voltage (EDV) thresholds, and battery removed. Register backup input This pin is used to provide backup potential to the bq2050 registers during periods when VCC 3V. A storage capacitor or a battery can be connected to RBI. Serial I/O pin This is an open-drain bidirectional pin. REF Voltage reference output for regulator REF provides a voltage reference output for an optional micro-regulator. VCC VSS Supply voltage input Ground
The bq2050 determines battery capacity by monitoring the amount of current input to or removed from a rechargeable battery. The bq2050 measures discharge and charge currents, measures battery voltage, estimates self-discharge, monitors the battery for low battery voltage thresholds, and compensates for temperature and charge/discharge rates. The current measurement is made by monitoring the voltage across a small-value series sense resistor between the negative battery terminal and ground. The estimate of scaled available energy is made using the remaining average battery voltage during the discharge cycle and the remaining nominal available charge. The scaled available energy measurement is corrected for the environmental and operating conditions. Figure 1 shows a typical battery pack application of the bq2050 using the LED display capability as a chargestate indicator. The bq2050 is configured to display capacity in relative display mode. The relative display mode uses the last measured discharge capacity of the battery as the battery "full" reference. A push-button display feature is available for momentarily enabling the LED display. The bq2050 monitors the charge and discharge currents as a voltage across a sense resistor (see RS in Figure 1). A filter between the negative battery terminal and the SR pin may be required if the rate of change of the battery current is too great.
Indicates optional. Directly connect to VCC across 1 cell (VBAT > 3V). Otherwise, R1, C1, and Q1 are needed for regulation > 1 cell. Programming resistors (6 max.) and ESD-protection diodes are not shown. R-C on SR may be required, application-specific. A series Zener may be used to limit discharge current at low voltages in designs using 3 or more cells.Figure 1. Battery Pack Application Diagram--LED Display
|Related products with the same datasheet|
|Some Part number from the same manufacture Texas Instruments, Inc.|
|BQ2050SN-D119TR ti BQ2050, Li-ion Gas Gauge With 1-Wire (DQ) Interface And 5 Led Drivers|
|BQ2050SNN Low-cost Lithium Ion Power Gauge ic|
|BQ2052 Gas Gauge ic For Lithium Primary Cells|
|BQ2052SN-A515 ti BQ2052, Primary Lithium Gas Gauge W/high-speed 1-Wire (HDQ) Interface, 3 Prgmable Led Patterns|
|BQ2054 Lithium Ion Fast-charge ic|
|BQ2054PN ti BQ2054, Li-ion Switchmode Charge Management ic|
|BQ2056 Low-dropout Li-ion Charge-control Ics With Autocomp(tm) Charge-rate Compensation|
|BQ2056CSN Advanced Li-ion Linear Charge Management ic|
|BQ2056PN ti BQ2056, Li-ion Low-dropout Linear Charge Management ic With Autocomptm|
|BQ2056T Low-dropout Li-ion Charge-control Ics With Autocomp(tm) Charge-rate Compensation|
|BQ2056TPN ti BQ2056T, Li-ion Low-dropout Linear Charge Management ic With Autocomptm|
|BQ2056TS Advanced Li-ion Linear Charge Management ic|
|BQ2056TSN ti BQ2056T, Li-ion Low-dropout Linear Charge Management ic With Autocomptm|
|BQ2056TTS Advanced Li-ion Linear Charge Management ic|
|BQ2056V Low-dropout Li-ion Charge-control Ics With Autocomp(tm) Charge-rate Compensation|
|BQ2056VPN ti BQ2056V, Li-ion Low-dropout Linear Charge Management ic With Autocomptm|
|BQ2056WSN Advanced Li-ion Linear Charge Management ic|
|BQ2057CDGK ti BQ2057C, Li-ion Low-dropout Linear (4.2V) Charge Management ic For One-cell Applications With Autocomptm|
AD7524MJB : ti AD7524, 8-Bit Multiplying DAC, Advanced LinCMOS(TM)
SN65HVD231QDR : ti SN65HVD231Q, Automotive Catalog 3.3-V CAN Transceivers With Sleep Mode, -40 to 125C
UCC28083PWR : Current Mode ti UCC28083, Current Mode Push-pull PWM With Programmable Slope Compensation
U2825N : High Speed PWM Controller
BQ20Z655DBT : SBS 1.1 Compliant Gas Gauge With Impedance Trackâ˘ Technology The bq20z655 SBS-compliant gas gauge and protection IC, incorporating patented Impedance Trackâ˘ technology, is a single IC solution designed for battery-pack or in-system installation. The bq20z655 measures and maintains an accurate r
ULN2004ANE4 : DARLINGTON TRANSISTOR ARRAY, NPN, 7, 50V, DIP Specifications: Module Configuration: Seven ; Transistor Polarity: NPN ; Collector Emitter Voltage V(br)ceo: 50V ; Transition Frequency Typ ft: - ; Power Dissipation Pd: - ; DC Collector Current: 500mA ; DC Current Gain hFE: 1000 ; Operating Temperature Range: -20°C to +70°C ; Transistor Case Style:
TPS60503DGSR : HIGH Efficiency, 250-ma Step-down Charge PUMP
SN74HC74NSRG4 : D-Type Flip-Flops ti SN74HC74, Dual D-type Positive-edge-triggered Flip-flops With Clear And Preset
SN74HC04APWRE4 : Logic - Gate And Inverter Integrated Circuit (ics) Inverter Tape & Reel (TR) 5.2mA, 5.2mA 2 V ~ 6 V; IC INVERTER HEX 14TSSOP Specifications: Number of Circuits: 6 ; Package / Case: 14-TSSOP (0.173", 4.40mm Width) ; Logic Type: Inverter ; Packaging: Tape & Reel (TR) ; Mounting Type: Surface Mount ; Number of Inputs: 1 ; Current - Output High, Low: 5.2mA, 5.2mA ; Operating Temperature: -40°C ~ 85°C ; Voltage - Supply: 2
CD4019BNSRE4 : Logic - Gate And Inverter - Multi-function, Configurable Integrated Circuit (ics) AND/OR Gate Tape & Reel (TR) 6.8mA, 6.8mA 3 V ~ 18 V; IC QUAD AND/OR SELECT GATE 16SOP Specifications: Number of Circuits: 4 ; Logic Type: AND/OR Gate ; Current - Output High, Low: 6.8mA, 6.8mA ; Output Type: Single-Ended ; Schmitt Trigger Input: No ; Voltage - Supply: 3 V ~ 18 V ; Operating Temperature: -55°C ~ 125°C ; Number of Inputs: 2 ; Mounting Type: Surface Mount ; Package / Ca
TVP5146M1PFPRG4 : 10-bit High Quality, Single-chip Digital Video Decoder That Digitizes And Decodes NTSC/PAL/SECAM.
LM741J : IC OPERATIONAL AMPLIFIER 8CDIP Texas Instruments' LM741 series are general-purpose operational amplifiers which feature improved performance over industry standards like the LM709. They are direct, plug-in replacements for the 709C, LM201, MC1439, and 748 in most applications.Specifications: Family: Linear - A
AKBPC604 : 6 Amp Controlled Avalanche Silicon Bridge Rectifier.
CS5124 : Current Mode PWM Controllers. High Performance, Integrated Current Mode PWM Controllers.
IRU1117 : 800ma Low Dropout Positive Adjustable Regulator. The is a low dropout, three-terminal adjustable regulator with minimum of 800mA output current capability. This product is specifically designed to provide well regulated supply for low voltage IC applications such as high speed bus termination and low current 3.3V logic supply. The IRU1117 is also well suited for other applications such as VGA and sound.
LM385B-2.5 : Micropower Voltage Reference. Operating Current Range. mA 1.5% and 3% Initial Voltage Tolerance Reference Impedance LM385. 1 Max 25°C All Devices. 1.5 Max Over Full Temperature Range Very Low Power Consumption Applications: Portable Meter References Portable Test Instruments Battery-Operated Systems Current-Loop Instrumentation Panel Meters Interchangeable With Industry.
LT280A : GAAS Hall ic For Noncontact Switch ( Unidirectional Magnetic Field-type ).
MAX1889 : MAX1889 Triple-output TFT LCD Power Supply With Fault Protection. Triple-Output TFT LCD Power Supply with Fault Protection The MAX1889 provides the three regulated output voltages required for active matrix, thin-film transistor liquid crystal displays (TFT LCDs). It combines a high-performance step-up regulator with two linear-regulator controllers and multiple levels of protection circuitry for a complete power-supply.
MC78M05ACDTRK : 500mA, 5V, Positive Voltage Regulator , Package: Dpak, Pins=3. The MC78M00/MC78M00A Series positive voltage regulators are identical to the popular MC7800 Series devices, except that they are specified for only half the output current. Like the MC7800 devices, the MC78M00 threeterminal regulators are intended for local, oncard voltage regulation. Internal current limiting, thermal shutdown circuitry and safearea.
MIC2776 : Reset Circuits. MIC2776 Micro-power Low Voltage Supervisor. The is a power supply supervisor which provides under-voltage monitoring and power-on reset generation in a compact 5-pin SOT package. include an adjustable under-voltage detector, a delay-generator, a manual reset input, and a choice of active-high, active-low, or open-drain active-low reset output. The user-adjustable monitoring input is compared.
NJU7325 : DC Motor Controller. Single-phase DC Brushless Motor Driver ic. It MOS-FET output for better saturation characteristics. It is suitable for small fan-motor applications. z Single Supply z Operating Voltage 5.5V z Low Operating Current z Low Saturation Output Voltage @Io=ħ250mA z C-MOS Technology z Package VSP8, TVSP8 ABSOLUTE MAXIMUM RATINGS PARAMETER Supply Voltage Input Voltage RATINGS +150 400 SYMBOL (unit) VDD (V) Vid (V) Topr.
S-8460 : . The is a PWM control step-up and step-down switching regulator-controller consisting of an automatic-selection control circuit for step-up and step-down, a reference voltage source, an oscillation circuit, an error amplifier, a phase compensation CMOS circuit, etc. performance The automatic-selection control circuit for and step-down switching regulator.
TA8302F : Motor Driver For Camera.
TLE5208-6G : Bridge. 1a Hex-half-bridge/double Six-driver. Overview Six High-Side and six Low-Side-Drivers Free configurable as switch, half-bridge or H-bridge Optimized for DC motor management applications 0.6 A continuous (1 A peak) current per switch RDS ON; 25 °C per switch Output: short-circuit protected and diagnosis Over-Temperature-Protection with hysteresis and diagnosis Standard SPI-Interface Very.
TPS77228DGK : ti TPS77228, Fast-transient-response 150-mA LDO W/power Good, MSOP-8 Packaging.
TPS79333DBVREP : ti TPS79333-EP, Military Enhanced Plastic Ultralow-noise High PSRR Fast RF 200-mA Low-dropout Linear Regulators.
ADP3198 : 8-Bit Programmable 2- to 4-Phase Synchronous Buck Controller The ADP31981 is a highly efficient, multiphase, synchronous buck switching regulator controller optimized for converting a 12 V main supply into the core supply voltage required by high per-formance Intel processors. It uses an internal 8-bit DAC to read a voltage identification (VID) code.
AAT4684 : Over-Voltage Protection Switch The AAT4684 OVP Switch?? is a member of AnalogicTech\'s Application Specific Power MOSFET ?? (ASPM??) product family. It is a P-channel MOSFET power switch with precise over-voltage protection control, designed to protect low-voltage systems against high-voltage faults up to +28V. If the input voltage exceeds the programmed.
VIPER27 : AC-DC Conversion Off-line high voltage converters. 800 V avalanche rugged power section PWM operation with frequency jittering for low EMI Operating frequency: 60 kHz for L type 115 kHz for H type Standby power at 265 Vac Limiting current with adjustable set point Adjustable and accurate overvoltage protection On-board soft-start Safe auto-restart after a fault condition Hysteretic thermal shutdown.