Texas Instruments SLUU083A manual

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Table of contents for the manual

  • Page 1

                  July 2002 Advanced Analog Products User ’ s Guide SLUU083A[...]

  • Page 2

    IMPORT ANT NOTICE T exas 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 orde[...]

  • Page 3

    T rademarks iii Read This First Preface Read This First About This Manual This user ’ s guide describes the bq2400x evaluation module. The EVM conve- niently evaluates a linear Li-ion bq2400x charge-management solution for one- and two-cell battery-pack applications. This guide describes a complete designed-and-tested charger , which delivers up [...]

  • Page 4

    Running Title — Attribute Reference v Contents Contents 1 Introduction 1-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.1 Background 1-2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [...]

  • Page 5

    1-1 Introduction This user ’ s guide describes the bq2400x Evaluation Module (SLUP051). The EVM conveniently evaluates a linear Li-ion bq2400x charge-management solution for one- and two-cell battery-pack applications. This guide describes a complete designed-and-tested charger , which delivers up to 1.0 A of continu- ous-charge current for one- [...]

  • Page 6

    Background 1-2 1.1 Background The bq2400x series ICs are advanced Li-Ion linear charge management devices for highly integrated and space-limited applications. They combine high-accuracy current and voltage regulation; FET pass-transistor and reverse-blocking Schottky; battery conditioning, temperature, or input-power monitoring; charge termination[...]

  • Page 7

    Performance Specification Summary 1-3 Introduction T able 1 – 2. Performance Specification Summary (T wo Cell) Specification T est Conditions Min Ty p Max Units Input dc voltage, V DC 9.1 9.5 † V Battery charge current I CHG J4 shorted, J3 open 0.4 0.5 0.6 A B attery c h arge current, I CHG J3 shorted, J4 open 0.9 1 1.1 A Battery voltage regula[...]

  • Page 8

    2-1 T est Summary T est Summary This chapter shows the test setups used, and the tests performed, in designing the bq2400xEVM. T opic Page 2.1 Setup 2-2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.2 T est Procedures 2-2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [...]

  • Page 9

    Setup 2-2 2.1 Setup The bq2400X EVM board requires a DC power source to provide input power and a single-cell lithium-ion or lithium-polymer battery to charge. Note: Other versions of the bq2400x IC can charge two-cell battery packs. The test setup connections and jumper setting selections are listed below . 2.1.1 I/O Connections Jack Connect to: J[...]

  • Page 10

    T est Procedures 2-3 T est Summary Note: V I for a single cell should not exceed 5.3 VDC for the 1-A charge rate and 7.6 V for the .5-A charge rate. Adjust the input power supply for 5 V . The red LED should illuminate to indicate charging, unless there is a fault or the battery is fully charged. The bq2400x enters preconditioning mode if the batte[...]

  • Page 11

    T est Procedures 2-4 The bq2400x enters preconditioning mode if the battery is below the LowV threshold. In this mode, the bq2400x trickle-charges with approximately 65 mA for approximately 23 minutes. If the battery does not reach the LowV threshold after this period, then the charge current is terminated and the bq2400x enters fault mode. The red[...]

  • Page 12

    3-1 Physical Layouts Physical Layouts This chapter contains the board layout and assembly drawings for the SLUP051 EVM. T opic Page 3.1 Board Layout 3-2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Chapter 3[...]

  • Page 13

    Board Layout 3-2 3.1 Board Layout Figure 3-1 shows the top layer of the SLUP051. Figure 3-2 shows the bottom layer . Figure 3-3 shows the SLUP051 top assembly view . Figure 3 – 1. SLUP051 Board Layout T op Layer[...]

  • Page 14

    Board Layout 3-3 Physical Layouts Figure 3 – 2. SLUP051 Board Layout Bottom Layer Figure 3 – 3. SLUP051 T op Assembly View[...]

  • Page 15

    4-1 Bill of Materials Bill of Materials This chapter contains the bill of materials required for the SLUP051 EVM. It also specifies the charge status configurations for the bq2400x. T opic Page 4.1 Bill of Materials 4-2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.2 bq2400x Charge Status Configurat[...]

  • Page 16

    Bill of Materials 4-2 4.1 Bill of Materials T able 4-1 lists materials required for the SLUP051 EVM. T able 4 – 1. SLUP051 Bill of Materials Qty Reference Designator Part Number Description MFG Size 2 C1, C4 T AJC106M016R Capacitor , 10 µ F tantalum, 16 V , ± 20%, 6032 A VX-Future 1210 1 C2 C0805X7R250-104KNE Capacitor , 0.1 µ F ceramic, X7R, [...]

  • Page 17

    bq2400x Charge Status Configurations 4-3 Bill of Materials 4.2 bq2400x Charge Status Configurations T able 4 – 2 lists the charge status configurations for the bq2400x. T able 4 – 2. Charge Status Configurations Part Number Number of Cells Charge Status Configuration bq24001 Single cell Single LED bq24002 Single cell 2 LED bq24003 Single cell B[...]

  • Page 18

    A-1 Schematic Schematic This chapter contains the schematic diagram for the EVM. T opic Page A.1 Schematic A-2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Appendix A[...]

  • Page 19

    J3 1 3 4 2 5% 511 R6 BQ24000 U1 26 27 28 29 30 25 24 23 22 21 1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15 14 13 12 11 0.2 R4 5% 511 R8 1% 51.1K R1 1% 316K R2 0.1 R3 16V 10UF C4 1% 95.3K R7 J4 1 3 4 2 0.1UF C2 J10 1 2 1% 18.7K R5 100 R9 10UF C1 D2 D1 J1 J7 3 2 1 J2 3 2 1 J6 3 2 1 J5 3 2 1 J8 2 1 J9 0.22UF C3 10PF C5 A2 B2 B1 A1 CR TMR_SEL STAT1 STAT2 AGN[...]