BQ78PL116RGZT

bq78PL116 SLUSAB8B – OCTOBER 2010 – REVISED FEBRUARY 2011 www.ti.com PowerLAN™ Master Gateway Battery Management Controller With PowerPump™ Cell Balancing Technology Check for Samples: bq78PL116 FEATURES 1 • 23 • • • • • • • • • bq78PL116 Designed for Managing 3- to 16-Series-Cell Battery Systems – Support for LCD and Electronic Paper Displays or EPDs – Configurable for 11-A, 26-A, or 110-A Operating Currents Systems With More Than Four Series Cells Require External bq76PL102 Dual-Cell Monitors SmartSafety Features: – Prevention: Optimal Cell Management – Diagnosis: Improved Sensing of Cell Problems – Fail Safe: Detection of Event Precursors Rate-of-Change Detection of All Important Cell Characteristics: – Impedance – Cell Temperature PowerPump Technology Transfers Charge Efficiently From Cell to Cell During All Operating Conditions, Resulting in Longer Run Time and Cell Life – Includes User-Configurable PowerPump Cell-Balancing Modes High-Resolution 18-Bit Integrating Delta-Sigma Coulomb Counter for Precise Charge-Flow Measurements and Gas Gauging Multiple Independent Δ-Σ ADCs: One-per-Cell Voltage, Plus Separate Temperature, Current, and Safety Simultaneous, Synchronous Measurement of Pack Current and Individual Cell Voltages Very Low Power Consumption – < 400 μA Active, < 185 μA Standby, < 85 μA Ship, and < 1 μA Undervoltage Shutdown Accurate, Advanced Temperature Monitoring • • • • of Cells and MOSFETs With up to 4 Sensors Fail-Safe Operation of Pack Protection Circuits: Up to Three Power MOSFETs and One Secondary Safety Output (Fuse) Fully Programmable Voltage, Current, Balance, and Temperature-Protection Features External Inputs for Auxiliary MOSFET Control Smart Battery System 1.1 Compliant via SMBus APPLICATIONS • • • Portable Medical Instruments and Test Equipment Mobility Devices (E-Bike) Uninterruptible Power Supplies and Hand-Held Tools DESCRIPTION The bq78PL116 master gateway battery controller is part of a complete Li-Ion control, monitoring, and safety solution designed for large series cell strings. The bq78PL116 along with bq76PL102 PowerLAN™ dual-cell monitors provide complete battery-system control, communications, and safety functions for a structure of three up to 16 series cells. This PowerLAN system provides simultaneous, synchronized voltage and current measurements using one A/D per-cell technology. This eliminates system-induced noise from measurements and allows the precise, continuous, real-time calculation of cell impedance under all operating conditions, even during widely fluctuating load conditions. PowerPump technology transfers charge between cells to balance their voltage and capacity. Balancing is possible during all battery modes: charge, discharge, and rest. Highly efficient charge-transfer circuitry nearly eliminates energy loss while providing true real-time balance between cells, resulting in longer run-time and improved cycle life. 1 2 3 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. PowerLAN, PowerPump, bqWizard are trademarks of Texas Instruments. All other trademarks are the property of their respective owners. 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. © 2010–2011, Texas Instruments Incorporated bq78PL116 SLUSAB8B – OCTOBER 2010 – REVISED FEBRUARY 2011 www.ti.com 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 (CONTINUED) Temperature is sensed by up to 4 external sensors and one on-chip sensor. This permits accurate temperature monitoring of each cell individually. Firmware is then able to compensate for the temperature-induced effects on capacity, impedance, and OCV on a cell-by-cell basis, resulting in superior charge/ discharge and balancing control. External MOSFET control inputs provide user- definable direct hardware control over MOSFET states. Smart control prevents excessive current through MOSFET body diodes. Auxiliary inputs can be used for enhanced safety and control in large multicell arrays. The bq78PL116 is completely user-configurable, with parametric tables in flash memory to suit a variety of cell chemistries, operating conditions, safety controls, and data reporting needs. It is easily configured using the supplied bqWizard™ graphical user interface (GUI). The device is fully programmed and requires no algorithm or firmware development. The bq78PL116 pin functions of LED1/SEG1–LED5/SEG5, PSH/BP/TP, and FIELD support LED, LCD, and electronic paper displays (EPDs). The user can configure the bq78PL116 for the desired display type. P-LAN V1 P1N P1S XT1 FLASH CELL 4 DSG EFCID Balance Temp CELL 3 EFCIC Voltage SPROT RISC CPU Voltage Balance Temp Second-Level Safety CSBAT Coulomb Counter CCBAT CSPACK Current A/D Voltage Balance Temp PowerLAN Communication Link Reset Logic RSTN VLDO1 CHG First-Level Safety and FET Control SRAM V2 P2N P2S XT2 Balance Temp PRE CELL 2 V3 P3N P3S XT3 Voltage CELL 1 V4 P4N P4S XT4 Watchdog 2.5 V LDO Core / CPU Measure 7 GPIO Internal Oscillator CCPACK SMBus LED1–5/SEG1–5, PSH/BP/TP, FIELD SMBCLK SMBDAT Internal Temperature I/O Safety B0320-03 Figure 1. BQ78PL116 Internal Block Diagram 2 Submit Documentation Feedback © 2010–2011, Texas Instruments Incorporated Product Folder Link(s): bq78PL116 bq78PL116 SLUSAB8B – OCTOBER 2010 – REVISED FEBRUARY 2011 B0332-03 Pack Positive www.ti.com Pack Negative V2 T2 V1 T1 V2 T2 V1 T1 9 V2 T2 8 V1 T1 7 V2 T2 6 V1 T1 5 V4 XT4 10 4 V3 XT3 11 3 V2 XT2 12 2 V1 XT1 SMBus PowerLAN Master Gateway Battery Controller bq78PL116 PowerLAN Communication Link bq76PL102 Dual-Cell Monitor Bq76PL102 Dual-Cell Monitor Example 12-cell configuration shown bq76PL102 Dual-Cell Monitor Bq76PL102 Dual-Cell Monitor Pack Protection Circuits and Fuse 1 RSENSE Figure 2. Example bq78PL116 System Implementation (12 Cells) Submit Documentation Feedback © 2010–2011, Texas Instruments Incorporated Product Folder Link(s): bq78PL116 3 bq78PL116 SLUSAB8B – OCTOBER 2010 – REVISED FEBRUARY 2011 www.ti.com Table 1. ORDERING INFORMATION Product bq78PL116 (1) Cell Configuration (1) Package Package Designator 3 to 16 series cells QFN-48, 7-mm × 7-mm Temperature Range –40°C to 85°C RGZ Ordering Number Quantity, Transport Media bq78PL116RGZ T 250, tape and reel bq78PL116RGZ R 2500, tape and reel For configurations consisting of more than four series cells, additional bq76PL102 parts must be used. AVAILABLE OPTIONS V1 XT1 XT2 V2 VLDO2 V3 XT3 XT4 V4 SMBDAT SMBCLK 46 45 44 43 42 41 40 39 38 37 DSG 47 1 VSS CHG 48 bq78PL116 RGZ Package (Top View) 36 LED5/SEG5 2 35 LED4/SEG4 PRE 3 34 LED3/SEG3 EFCIC 4 33 LED2/SEG2 EFCID 5 32 LED1/SEG1 CCBAT 6 31 PSH/BP/TP Thermal Pad 24 RSTN P-LAN 25 23 12 P4N OSCO 22 NC P4S 26 21 11 P3N OSCI 20 NC P3S 27 19 10 SDI3 CSPACK 18 NC SDO2 28 17 9 P2N CSBAT 16 FIELD P2S 29 15 8 P1N VLDO1 14 SPROT SDI1 30 13 7 SDO0 CCPACK P0023-25 Figure 3. bq78PL116 Pinout bq78PL116 TERMINAL FUNCTIONS NAME NO. TYPE (1) DESCRIPTION CCBAT 6 IA Coulomb counter input (sense resistor), connect to battery negative CCPACK 7 IA Coulomb counter input (sense resistor), connect to pack negative CHG 1 O Charge MOSFET control (active-high, low opens MOSFET) CSBAT 9 IA Current sense input (safety), connect to battery negative CSPACK 10 IA Current sense input (safety), connect to pack negative DSG 2 O Discharge MOSFET control (active-high, low opens MOSFET) EFCIC 4 I External charge MOSFET control input EFCID 5 I External discharge MOSFET control input (1) 4 Types: I = Input, IA = Analog input, IO = Input/Output, O = Output, P = Power Submit Documentation Feedback © 2010–2011, Texas Instruments Incorporated Product Folder Link(s): bq78PL116 bq78PL116 SLUSAB8B – OCTOBER 2010 – REVISED FEBRUARY 2011 www.ti.com bq78PL116 TERMINAL FUNCTIONS (continued) NAME NO. TYPE (1) DESCRIPTION FIELD 29 O EPD field segment LED1/SEG1 32 O LED1 – open-drain, active-low, LCD and EPD segment 1 LED2/SEG2 33 O LED2 – open-drain, active-low, LCD and EPD segment 2 LED3/SEG3 34 O LED3 – open-drain, active-low, LCD and EPD segment 3 LED4/SEG4 35 O LED4 – open-drain, active-low, LCD and EPD segment 4 LED5/SEG5 36 O LED5 – open-drain, active-low, LCD and EPD segment 5 N/C 26, 27 IO Connect 1-MΩ resistor to VSS N/C 28 O No connect OSCI 11 I External oscillator input (no connect, internal oscillator used) OSCO 12 O External oscillator output (no connect, internal oscillator used) P1N 15 O Charge-balance gate drive, cell 1 north P2N 17 O Charge-balance gate drive, cell 2 north P2S 16 O Charge-balance gate drive, cell 2 south P3N 21 O Charge-balance gate drive, cell 3 north P3S 20 O Charge-balance gate drive, cell 3 south P4N 23 O Charge-balance gate drive, cell 4 north P4S 22 O Charge-balance gate drive, cell 4 south P-LAN 24 IO PowerLAN I/O to external bq76PL102 nodes PRE 3 O Precharge MOSFET control (active-high) PSH/BP/TP 31 IO Pushbutton detect for LED display, LCD backplane, EPD top plane and charge pump RSTN 25 I Device reset, active-low SDI1 14 I Connect to SDO0 via a capacitor SDI3 19 I Internal PowerLAN connection – connect to SDO2 through a 0.01-μF capacitor SDO0 13 O Requires 100-kΩ pullup resistor to VLDO1 SDO2 18 O Internal PowerLAN connection – connect to SDI3 through a 0.01-μF capacitor SMBCLK 37 IO SMBus clock signal SMBDAT 38 IO SMBus data signal SPROT 30 O Secondary protection output, active-high (FUSE) V1 47 IA Cell-1 positive input V2 44 IA Cell-2 positive input V3 42 IA Cell-3 positive input V4 39 IA Cell-4 positive input VLDO1 8 P Internal LDO-1 output, bypass with 10-μF capacitor to VSS VLDO2 43 P Internal LDO-2 output, bypass with 10-μF capacitor to V2 VSS 48 IA Cell-1 negative input XT1 46 IA External temperature-sensor-1 input XT2 45 IA External temperature-sensor-2 input XT3 41 IA External temperature-sensor-3 input XT4 40 IA External temperature-sensor-4 input – – P Thermal pad. Connect to VSS Submit Documentation Feedback © 2010–2011, Texas Instruments Incorporated Product Folder Link(s): bq78PL116 5 bq78PL116 SLUSAB8B – OCTOBER 2010 – REVISED FEBRUARY 2011 www.ti.com ABSOLUTE MAXIMUM RATINGS (1) over operating free-air temperature range (unless otherwise noted) RANGE UNITS TA Operating free-air temperature (ambient) –40 to 85 °C Tstg Storage temperature –65 to 150 °C V4 Voltage range with respect to V3 –0.5 to 5.0 V V3 Voltage range with respect to V2 –0.5 to 5.0 V V2 Voltage range with respect to V1 –0.5 to 5.0 V V1 Voltage range with respect to VSS –0.5 to 5.0 V EFCIC, EFCID Voltage range with respect to VSS –0.5 to 5.0 V LED1/SEG1—LED5/SEG5 Voltage on I/O pin with respect to VSS –0.5 to 5.0 V SMBCLK, SMBDAT Voltage range with respect to VSS –0.5 to 6.0 V VLDO1 Voltage with respect to VSS 3.0 V VLDO2 Voltage range with respect to V2 3.0 V RSTN Voltage range with respect to VSS –0.5 to VLDO1 + 0.5 V FIELD, SPROT, PSH/BP/TP Voltage range with respect to VSS –0.5 to VLDO1 + 0.5 V CCBAT, CCPACK, CSBAT, CSPACK Voltage range with respect to VSS –0.5 to VLDO1 + 0.5 V CHG, DSG, PRE Voltage range with respect to VSS –0.5 to VLDO1 + 0.5 V OSCI, OSCO Voltage with respect to VSS –0.5 to VLDO1 + 0.5 V XT1, XT2 Voltage with respect to VSS –0.5 to VLDO1 + 0.5 V SDO0 Voltage range with respect to VSS –0.5 to VLDO1 + 0.5 V XT3, XT4 Voltage range with respect to V2 –0.5 to VLDO2 + 0.5 V SDO2, SDI3, P-LAN Voltage range with respect to V2 –0.5 to VLDO2 + 0.5 V SDO0, SDI1 Voltage range with respect to VSS –0.5 to V1 + 0.5 V P1N, P2S, P2N Voltage range with respect to VSS –0.5 to V1 + 0.5 V P3S, P3N, P4S, P4N Voltage range with respect to V2 –0.5 to V3 + 0.5 V PRE, CHG, DSG, SPROT, FIELD, PSH/BP/TP Current source/sink 20 mA LED1/SEG1–LED5/SEG5 Current source/sink 20 mA VLDO1, VLDO2 Current source/sink 20 mA ESD tolerance JEDEC, JESD22-A114 human-body model, R = 1500 Ω, C = 100 pF 2 kV Lead temperature, sodlering Total time < 3 seconds 300 °C (1) Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under Recommended Operating Conditions is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. RECOMMENDED OPERATING CONDITIONS over operating free-air temperature range (unless otherwise noted) VSUP Supply voltage—V1, V2, V3, V4 MIN NOM All cell voltages equal, four-cell operation 2.5 3.6 All cell voltages equal, three-cell operation (V3 = V4) 2.8 3.6 Minimum startup voltage—V1, V2, V3, V4 All cell voltages equal VIN Input cell voltage range—V(n+1) – V(n), n = 1, 2, 3, 4 CVLDO1 VLDO 1 capacitor—VLDO1 2.2 CVLDO2 VLDO 2 capacitor—VLDO2 2.2 CVn Cell-voltage capacitor—Vn 4.5 4.5 2.9 V 0 1 Submit Documentation Feedback UNIT V VStartup 6 MAX 4.5 V 10 47 μF 10 47 μF μF © 2010–2011, Texas Instruments Incorporated Product Folder Link(s): bq78PL116 bq78PL116 SLUSAB8B – OCTOBER 2010 – REVISED FEBRUARY 2011 www.ti.com ELECTRICAL CHARACTERISTICS TA = –40°C to 85°C (unless otherwise noted) DC Characteristics PARAMETER TEST CONDITIONS IDD Operating-mode current (at V2) ISTBY Standby-mode current (at V2) SMBCLK = SMBDAT = VSS, IBAT = 0, cells = 3.6 V ISHIP Ship-mode current (at V2) SMBCLK = SMBDAT = VSS, IBAT = 0, cells = 3.6 V IECUV Extreme cell undervoltage shutdown current All cells < 2.7 V and any cell < ECUV set point SPROT, LEDEN, PSH/BP/TP(bq78PL116), FIELD(bq78PL116) IOL < 4 mA SPROT, LEDEN, PSH/BP/TP(bq78PL116), FIELD(bq78PL116) IOH < –4 mA VOL VOH (1) VIL SPROT, LEDEN, PSH/BP/TP(bq78PL116), FIELD(bq78PL116) VIH SPROT, LEDEN, PSH/BP/TP(bq78PL116), FIELD(bq78PL116) (1) MIN Acrtive mode, cells = 3.6 V TYP MAX UNIT 400 μA 185 μA 85 μA 0 1 μA 0.5 V VLDO1 – 0.1 V 0.25 VLDO1 V 0.75 VLDO1 V Does not apply to SMBus pins. Voltage-Measurement Characteristics TA = –40°C to 85°C (unless otherwise noted) PARAMETER TEST CONDITIONS MIN Measurement range 2.75 MAX UNIT 4.5 V