bq2013HEVMĆ001 GasĆGauge IC Evaluation Module User’s Guide November 2000 Advanced Analog Products SLUU081
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.
Running Title—Attribute Reference Contents 1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.1 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.2 Kit Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.
Running Title—Attribute Reference Figures 3–1 4–1 6–1 7–1 8–1 8–2 8–3 8–4 8–5 DM2013H Schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . DM2013H Dimensions and Layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Performance Specification Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Chapter 1 Introduction The bq2013H EVM is a complete evaluation system for the bq2013H Gas-Gauge IC for High Discharge Rates. The EVM includes one DM2013H circuit module, a current sense resistor, an EV2200 PC Interface Board for Gas-Gauge Evaluation, a PC serial cable, and Windows-based PC software.
Features 1.1 Features - Complete evaluation system for the bq2013H Gas-Gauge IC PreprogrammedDM2013H module for quick setup PC software and interface board for easy evaluation Software allows data logging for system analysis 1.2 Kit Contents - DM2013H preconfigured circuit module Sense resistor EV2200 PC interface board Set of evaluation software disks entitled EV2200-HDQ PC serial cable Set of support documentation 1.3 Ordering Information Table 1–1.
Chapter 2 DM2013H—bq2013H-Based Circuit Module The DM2013H circuit module is a complete and compact example solution of a bq2013H circuit for capacity monitoring of NiCd, NiMH, or lead-acid packs. The DM2013H incorporates a bq2013H gas-gauge IC and all other components necessary to accurately monitor and display the capacity of up to 14 nickel or 12 lead-acid cells. The DM2013H includes five LEDs to display remaining capacity in 20% increments of the programmed capacity.
Pin Descriptions 2.1 Pin Descriptions P1 P2 P3 P4 P5 P6 P7 P8 HDQ/Serial communications port DONE/Done input BAT+/Battery positive/pack positive ACC/Display activation RBI/Register backup input GND/Ground PACK–/Pack negative BAT–/Battery negative 2.2 Programming The DM2013H circuit module is preconfigured for battery pack chemistry, voltage, and pack capacity.
Programming Table 2–2. Self-Discharge Programming Self-Discharge Setting Note: 2.2.3 Pin 4 Chemistry H NiMH Z NiCd L Lead–acid Select the self-discharge setting that most closely models the battery pack to be used. LED Display Mode The DM2013H 5 onboard LEDs indicate remaining battery capacity in relative mode (20% increments of the learned battery capacity). Pin 5 of the bq2013H determines the LED display mode of the DM2013H.
Programming 2.2.5 Offset Error Compensation The DM2013H is configured to apply compensation to correct for –75 µV of offset error. This is the error typically found using the bq2013H on a well-designed PCB. Pin 7 of the bq2013H determines the offset error compensation of the DM2013H. Resistors R3 and R8 set the pin to a high (H), low (L), or float (Z) state during board initialization. Table 2–5. Charge Efficiency Programming Self-Discharge Setting 2.2.
Chapter 3 DM2013H Schematic The DM2013H schematic shows all possible components on the board for various configurations, including all configuration resistors. Only those resistors that set the desired configuration should be installed. The schematic notes indicate where variations exist. Topic 3.1 Page Schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Schematic 3.1 Schematic Figure 3–1 shows the DM2013H schematic diagram. Figure 3–1.
Chapter 4 DM2013H Physical Layouts This chapter contains the board layout and assembly drawings for the DM2013H. Topic 4.1 Page Board Layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Board Layout 4.1 Board Layout Figure 4–1 shows the dimensions, PCB layers, and assembly drawing for the DM2013H. Figure 4–1.
Chapter 5 DM2013H Bill of Materials This chapter contains the bill of materials required for the DM2013H. Topic 5.1 Page Bill of Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Bill of Materials 5.1 Bill of Materials Table 5–1 lists materials requdred for the DM2013H. Table 5–1. Bill of Materials Ref Des Qty –001 Description MFG MFG PART# Size See FAB DWG PCB 1 Printed Circuit Board, 0.031, FR4, SMOBC, HASL Any bq2113 REV.A C1,C5 2 Capacitor, Ceramic, 1 µF, 25 V, ±20%, X7R Panasonic ECJ–3YB1E105K 3216 C2,C3,C4 3 Capacitor, Ceramic, 0.
Chapter 6 DM2013H Performance Specification Summary This chapter summarizes the performance specifications of the DM2013H. Table 6–1 gives the performance specifications of the circuit. Figure 6–1. Performance Specification Summary Specification Charge and Discharge Current Note: Min Typ Max 0.05 15 Units A Charge and discharge maximums are limited by the power dissipation of the 10 mΩ 3 W sense resistor included in the kit.
6-2
Chapter 7 EVM Hardware and Software Setup This section describes how to install the bq2013H EVM PC software and how to connect the different components of the EVM. Topic Page 7.1 EVM Hardware and Software Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-2 7.2 Hardware Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Software Installation 7.1 Software Installation The following steps install the EV2200–HDQ software: 1) Insert disk 1 into a 3 1/2 inch floppy drive. 2) Select the 3 1/2 inch drive using My Computer or File Manager. 3) Double-click the Setup.exe icon. The setup program prompts for the remaining disks and installs a Windows application group. 7.2 Hardware Connection There are three hardware components to the bq2013H EVM: The DM2013H circuit module, the EV2200 PC interface board, and the PC. 7.2.
Hardware Connection 7.2.2 PC Interface Connection The following steps configure the hardware for interface to the PC: 1) Connect the DM2013H based smart battery to the EV2200 using wire leads as in Table 7–1. 2) Connect the PC serial cable to the EV2200 and the PC COM port. Table 7–1. DM2013H-to-EV2200 Connection DM2013H Based Battery EV2200 P1/HDQ SMBD/HDQ1 or SMBC/HDQ2 P7/PACK– VSS The bq2013H EVM is now set up for operation.
7-4
Chapter 8 Operation This chapter details the operation of the bq2013H EVM software. Topic Page 8.1 Starting the Program . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-2 8.2 Initialization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-2 8.3 Data Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-3 8.4 Status Screen . . . . . . . . . . . . . . . .
Starting the Program 8.1 Starting the Program Run EV2200-xxH from the Start|Programs|EV2200-xxH menu sequence. The software requests the PC communications port the first time it is run after installation. Choose the Retry Auto-detection button for automatic port configuration. After the port is detected, the software displays the bq2013H data screen. Figure 8–1. Initial Data Screen The data screen may not show correct information until parameters in the software are initialized. 8.
Data Screen Figure 8–2. Setup Screen Enter the corresponding resistor values in the Circuit Configuration box. These values can be saved to disk using the Save Setup to Disk button so that they are automatically called up when the program loads. Table 8–1. Resistor Designations for Setup Screen Input Circuit Configuration NAME Schematic Identifier Rsns R10–10 mΩ RB1 R6 RB2 R7 The Initial Settings box programs selected registers of the bq2013H.
Status Screen Figure 8–3. bq2013H Data Screen The registers can be written by selecting a data box, overwriting the present value with the desired value, and pressing ENTER. The data must be entered in the same base (decimal or hexadecimal) as the selected base. The screen also shows the bit status of the status flags registers FLGS1 and FLGS2. 8.4 Status Screen The Status screen graphically illustrates bq2013H operation.
Status Screen 8.5 Pro Screen The Pro screen allows read and write access to all the registers of the bq2013H. Figure 8–5. Pro Screen To read or write a location: - Enter the address location of the register in the Address box. The register and address can be selected from the pulldown menu. Enter the data to be written if applicable. Depress the Read or Write button.
Status Screen 8.6 Data Logging The bq2013H registers can be logged by using the data log function. To log the data and create a log file: - Select File|Start Data Log from the pulldown menu. Enter a data log file name Press OK Set the data log interval Press Close To stop the data logging select File|Close Data Log from the pulldown menu. The file can be imported into a text editor, spreadsheet, or word processor program.
