Preliminary bq219XL Smart Battery Module with LEDs Features ➤ Complete smart battery solution for NiCd, NiMH, and Li-Ion battery packs ➤ Based on the bq2092 or bq2040 Gas Gauge IC ➤ Ideal for DR35 or DR36 type packs ➤ Narrow board fits in the crevice formed by two adjacent battery packs ➤ Accurate measurement of available battery capacity ➤ Designed for battery pack integration: ➤ – Measures only 3.5 (L) x 0.3 (W) inches – I ncl ud e s G a s G aug e I C, c o nf ig u r a t ion EEPROM, and sense resistor – Four onboard state-of-charge LEDs with push-button activation – Low operating current for minimal battery drain parameters. The Smart Battery Module uses the onboard sense resistor to track charge and discharge activity of the battery pack. Figure 1 shows how the module connects to the cells. A module development kit is also available for the bq219XL. The bq219XLB-KT includes one configured module and the following: Critical battery information available over two-wire serial port General Description The bq219XL Smart Battery Module provides a complete solution for the design of intelligent battery packs. The bq219XL uses the SMBus protocol and supports the Smart Battery Data commands in the SMB/SBD specifications. Designed for battery pack integration, the bq219XL combines the bq2092 or bq2040 Gas Gauge IC with a serial EEPROM on a small printed circuit board. The board includes all the necessary components to accurately monitor battery capacity and communicate critical battery parameters to the host system or battery charger. The bq219XL also includes four LEDs. The push-button switch activates the LEDs to show remaining battery capacity in 25% increments. 1) An EV2200-92 or EV2200-40 interface board that allows connection to the serial port of any ATcompatible computer. 2) Menu-driven software to display charge/discharge activity and to allow user interface to the Gas Gauge IC and serial E2PROM from any standard Windows 95 or 3.1x PC. Pin Descriptions Contacts are provided on the bq219XL for direct connection to the battery stack (B+, B-) and the two-wire interface (C, D). Please refer to the bq2092 or bq2040 data sheet for specific information on the operation of the Gas Gauge and communication interface. Unitrode configures the bq219XL based on the information requested in Table 1. The configuration defines the pack voltage, capacity, and chemistry and charge control 6/98 1 B+ BAT+/Battery positive/Pack positive P- PACK-/Pack negative C SMBC/Communications clock D SMBD/Serial data B- BAT-/Battery negative STAT STAT/No connect bq219XL Preliminary Battery Pack Cells Bbq219XL B+ PPACK- PACK+ Load Charger FG219XL1.eps Figure 1. Module Connection Diagram 2 Preliminary bq219XL Table 1. bq219XL Module Configuration Customer Name: ______________________________________________________________________________________________ Contact: _______________________________________________________ Phone:____________________________ Address:________________________________________________________________________________________________ Sales Contact: __________________________________________________ Phone: ____________________________ Board Configuration IC type LEDs and switch Display mode Discharge rate (3.0A max.) Duration at max. discharge Number of series cells ________________ ________________ ________________ Min ____________ ________________ ________________ bq2040 or bq2092 Yes or No Relative or Absolute Avg ____________ Max ___________ EEPROM Configuration Remaining time alarm (min) Remaining capacity alarm (mAh) Charging voltage (mV) Design cpaacity (mAh) Design voltage (mV) Manufacturer date Serial number Fast-charging current (mA) Maintenance charging current (mA) Li-Ion taper current (mA) Maximum overcharge (mAh) Maximum temperature (°C) ∆T/∆t (°C/min) Fast-charge efficiency (%) Maintenance charge efficiency (%) Self-discharge rate (%/day) EDV1 (mV) EDVF (mV) Hold-off timer for ∆T/∆t (sec.) Manufacturer name Device name Chemistry Manufacturer data FAE Approval: Typical Values NiMH Li-Ion 10 min 10 min _______________ Sets the low time alarm level _______________ Sets the low capacity alarm level _______________ _______________ _______________ _______________ _______________ _______________ _______________ _______________ Sets the requested charging voltage 65535 4.1V/cell Defines the battery pack capacity 3000 3600 Defines the battery pack voltage 12000 10800 Battery pack manufacturer date mm/dd/yy mm/dd/yy Battery pack serial number 0-65535 0-65535 Sets the requested charging current 1C 1C Sets the requested maintenance charging current C/20 0 Sets the upper limit for charge termination NA C/10 Sets the maximum amount of overcharge 256mAh 128mAh Sets the maximum charge temperature 61°C 61°C Sets the termination rate 3°C/3min 4.6°C/20s Sets the fast-charge efficiency factor 95% 100% _______________ Sets the maintence charge efficiency factor _______________ _______________ _______________ Sets the batterys self-discharge rate Sets the initial end-of-discharge warning Sets the final end-of-discharge warning _______________ _______________ _______________ _______________ C/10 80% 5-3 100% 1.5%/day 0.2%/day 1.05V/cell 3.0V/cell 1.0V/cell 2.8V/cell Sets the hold off period for ∆T/∆t 180s termination _______________ Programs manufacturer’s name (11 char. max) bq _______________ Programs device name (7 char. max) bq36 _______________ Programs pack’s chemistry (5 char. max) NiMH _______________ Open field (5 char. max) 2040 ________________ Date: ___________________ _______________ C/10 320s bq bq202 LION 2040 bq219XL Preliminary bq219XL Schematic 219xlb 4 Preliminary bq219XL bq219XL Board 5 bq219XL Preliminary Ordering Information bq219XL B – XXX Customer Code: Blank = Sample or Pre-production1 KT = Evaluation system XXX = Customer-specific; assigned by Unitrode2 Package Option: B = Board-level product Device: Smart Battery Module with LEDs Notes: 1. Requires configuration sheet (see Table 1) 2. Example production part number: bq219XLB-001 6 IMPORTANT NOTICE Texas Instruments and its subsidiaries (TI) reserve the right to make changes to their products or to discontinue any product or service without notice, and advise customers to obtain the latest version of relevant information to verify, before placing orders, that information being relied on is current and complete. All products are sold subject to the terms and conditions of sale supplied at the time of order acknowledgement, including those pertaining to warranty, patent infringement, and limitation of liability. TI warrants performance of its semiconductor products to the specifications applicable at the time of sale in accordance with TI’s standard warranty. Testing and other quality control techniques are utilized to the extent TI deems necessary to support this warranty. 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