Using the bq241xx (bqSWITCHER™) User's Guide Literature Number: SLUU200A July 2004 – Revised December 2007
SLUU200A – July 2004 – Revised December 2007 Submit Documentation Feedback
Contents 1 2 3 4 Introduction................................................................................................................ 5 1.1 Background ....................................................................................................... 5 1.2 Performance Specification Summary .......................................................................... 5 Test Summary ............................................................................................................
List of Figures 1 2 3 4 5 bq241xxEVM bq241xxEVM bq241xxEVM bq241xxEVM bq241xxEVM Schematic .................................................................................................... 9 Top Assembly .............................................................................................. 10 Top Silk Screen ............................................................................................ 11 Top Layer ...................................................................................
User's Guide SLUU200A – July 2004 – Revised December 2007 Using the bq241xx (bqSWITCHER™) 1 Introduction This user's guide describes the bq241xxEVM (bqSWITCHER™) Evaluation Module. The Evaluation Module provides a convenient method for evaluating the performance of a charge management solution for portable applications using the bq241xx product family. A complete designed and tested charger is presented. The charger is designed to deliver up to 2.0 A of continuous output current.
www.ti.com Test Summary Table 1. Performance Specification Summary SPECIFICATION TEST CONDITIONS MIN Input DC voltage, VI(DC) VREG +0.6 Battery charge current, IO(CHG) Power dissipation 2 TYP MAX 5.0 16 1.33 2.0 UNIT V A bq24100 (1 cell) 5 V ≤ VIN ≤ 16 V, V(BAT) = 4.2 V, IOUT = 1.33 A 0.6 W bq24103 bq24103A bq24113 (1 cell) 5 V ≤ VIN ≤ 16 V, V(BAT) = 4.2 V, IOUT = 1.33 A 0.6 W bq24103 bq24103A bq24113 (2 cell) 9 V ≤ VIN ≤ 16 V, V(BAT) = 8.4 V, IOUT = 1.33 A 0.
www.ti.com Test Summary Table 2. I/O and Jumper Connections (Factory Jumper Selections shown in Bold Text) ASSEMBLY –002 –003 –004 –005 -006 bq24105 (1) bq24113 (2) bq24115 (1) bq24103 (2) bq24103A (2) Device J1 DC+/DC-:Input voltage range (V) 5 to 16 J2 BAT+/BAT-No. cell in series 1 Output regulation voltage (V) 4.2 VREG+0.8 to 16 (1) 1 4.2 5 to 16 1 (1) 4.2 VREG+0.8 to 16 (1) 1 (2) 4.2 5 to 16 (2) 1 (1) 4.2 5 to 16 (2) 1 (2) 4.
www.ti.com Test Summary 6. When the current reaches the taper termination threshold, set by the RSET2 resistor, the charge is terminated. The PG LED should be still lit and the STAT1 LED should turn off and STAT2 LED lights. 7. If the battery discharges down to the recharge threshold, the charger starts fast charging. The PG LED should remain lit, the STAT2 LED should turn off and STAT1 LED lights. An alternative method of testing the EVM is with a source meter, that can sink or source current.
www.ti.com Schematic 3 Schematic Figure 1 shows the schematic diagram for the EVM. Figure 1.
www.ti.com Physical Layouts 4 Physical Layouts This chapter contains the board layout and assembly drawings for the EVM. 4.1 Board Layout Figure 2 shows the top assembly of the EVM. Figure 3 shows the top silk screen. Figure 4 shows the top layer. Figure 5 shows the bottom layer view. Figure 2.
www.ti.com Physical Layouts Figure 3. bq241xxEVM Top Silk Screen Figure 4.
www.ti.com Physical Layouts Figure 5.
www.ti.com List of Materials 5 List of Materials Table 3 through Table 7 list the components used in this design. With minor component adjustments this design could be modified to meet a wide range of applications. Table 3.
www.ti.com List of Materials Table 4. bq24105EVM-002 List of Materials (1) REFERENCE QTY DESIGNATOR SIZE MFR PART NUMBER C1, C2, C4 3 Capacitor, ceramic, 10 µF, 25 V, X5R, 20% 1206 Panasonic ECJ-3YB1E106M C9 0 Capacitor, ceramic, 10 µF, 25 V, X5R, 20% 1206 Panasonic ECJ-3YB1E106M C3 1 Capacitor, ceramic, 0.1 µF, 16 V, X7R, 10% 603 Panasonic ECJ-1VB1C104K C5, C7, C8 3 Capacitor, ceramic, 0.1 µF, 16 V, X7R, 10% 603 Panasonic ECJ-1VB1C104K C6 1 Capacitor, ceramic, 0.
www.ti.com List of Materials Table 5. bq24113EVM-003 List of Materials (1) REFERENCE QTY DESIGNATOR DESCRIPTION (2) (3) (4) (5) SIZE MFR PART NUMBER C1, C2, C4 3 Capacitor, ceramic, 10 µF, 25 V, X5R, 20% 1206 Panasonic ECJ-3YB1E106M C9 0 Capacitor, ceramic, 10 µF, 25 V, X5R, 20% 1206 Panasonic ECJ-3YB1E106M C3 0 Capacitor, ceramic, 0.1 µF, 16 V, X7R, 10% 603 Panasonic ECJ-1VB1C104K C5, C7, C8 3 Capacitor, ceramic, 0.
www.ti.com List of Materials Table 6. bq24115EVM-004 List of Materials (1) REFERENCE DESIGNATOR DESCRIPTION SIZE MFR PART NUMBER C1, C2, C4 3 Capacitor, ceramic, 10 µF, 25 V, X5R, 20% 1206 Panasonic ECJ-3YB1E106M C9 0 Capacitor, ceramic, 10 µF, 25 V, X5R, 20% 1206 Panasonic ECJ-3YB1E106M C3 1 Capacitor, ceramic, 0.1 µF, 16 V, X7R, 10% 603 Panasonic ECJ-1VB1C104K C5, C7, C8 3 Capacitor, ceramic, 0.1 µF, 16 V, X7R, 10% 603 Panasonic ECJ-1VB1C104K C6 0 Capacitor, ceramic, 0.
www.ti.com List of Materials Table 7. bq24103EVM-005 List of Materials (1) REFERENCE DESIGNATOR QTY DESCRIPTION (2) (3) (4) (5) SIZE MFR PART NUMBER C1, C2, C4 3 Capacitor, ceramic, 10 µF, 25 V, X5R, 20% 1206 Panasonic ECJ-3YB1E106M C9 0 Capacitor, ceramic, 10 µF, 25 V, X5R, 20% 1206 Panasonic ECJ-3YB1E106M C3 0 Capacitor, ceramic, 0.1 µF, 16 V, X7R, 10% 603 Panasonic ECJ-1VB1C104K C5, C7, C8 3 Capacitor, ceramic, 0.
www.ti.com References Table 8. bq24103AEVM-006 List of Materials (1) REFERENCE DESIGNATOR DESCRIPTION SIZE MFR PART NUMBER C1, C2, C4 3 Capacitor, ceramic, 10 µF, 25 V, X5R, 20% 1206 Panasonic ECJ-3YB1E106M C9 0 Capacitor, ceramic, 10 µF, 25 V, X5R, 20% 1206 Panasonic ECJ-3YB1E106M C3 0 Capacitor, ceramic, 0.1 µF, 16 V, X7R, 10% 603 Panasonic ECJ-1VB1C104K C5, C7, C8 3 Capacitor, ceramic, 0.1 µF, 16 V, X7R, 10% 603 Panasonic ECJ-1VB1C104K C6 1 Capacitor, ceramic, 0.
EVALUATION BOARD/KIT IMPORTANT NOTICE Texas Instruments (TI) provides the enclosed product(s) under the following conditions: This evaluation board/kit is intended for use for ENGINEERING DEVELOPMENT, DEMONSTRATION, OR EVALUATION PURPOSES ONLY and is not considered by TI to be a finished end-product fit for general consumer use. Persons handling the product(s) must have electronics training and observe good engineering practice standards.
Mailing Address: Texas Instruments, Post Office Box 655303, Dallas, Texas 75265 Copyright © 2007, Texas Instruments Incorporated EVM WARNINGS AND RESTRICTIONS It is important to operate this EVM within the input voltage range of 0.6 V to 16 V and the output voltage range of 0.6 V to 16 V. Exceeding the specified input range may cause unexpected operation and/or irreversible damage to the EVM.
IMPORTANT NOTICE 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.
