Texas Instruments BQ2461X - Manuals

Page 2 - Introduction; EVM Features; High Efficiency Synchronous Buck Charger; General Description; Jack

Introduction www.ti.com 1 Introduction 1.1 EVM Features • Evaluation Module For bq2461x/bq2463x • High Efficiency Synchronous Buck Charger • User-programmable up to 26V Battery Voltage • AC Adapter Operating Range 5 V–28 V • LED Indication for Control and Status Signals. • Test Points for Key Signal...

Page 3 - Controls and Key Parameters Setting; Table 2. Controls and Key Parameters Setting; Recommended Operating Conditions; Table 3. Recommended Operating Conditions

www.ti.com Introduction Table 1. I/O Description (continued) Jack Description J5–GND Ground JP1–LOW Ground JP1–TTC Timer capacitor pin JP1–HI Pull-up voltage source JP2–HI Pull-up voltage source JP2–LEDPWR LED Pull-up power line JP3–VREF IC reference voltage VREF JP3–VPULLUP Pull-up voltage source J...

Page 4 - Test Summary; Definitions; Power Supplies

Test Summary www.ti.com R25 and R28 can be changed to regulate output. V BAT = 2.1V × [1+ R25/R28]; for bq2461x; V BAT = 1.8V × [1+ R25/R28]; for bq2463x; Adjust the input voltage as required. Output set to operate at 21V (bq2461x) or 18V (bq2463x) from thefactory. 2 Test Summary 2.1 Definitions Thi...

Page 5 - Load; Power; Oscilloscope; METERS; Equipment Setup; After the above steps, the test setup for HPA422 is shown in

bq24610/616/617/30 EVM HPA422 ACPWR J1 PGND SYS J5 PGND BAT VREF JP3 PG TS APPLICATION CIRCUIT PH TP12SYS VBAT TP1ACPWR STAT1 J3 J2 JP1 U1 JP5 J4 V Iin I Power supply #1 Isys V Ibat V I Load #1 Load #2 I TP2 JP2 GND VEXT TTC ISET1 ACSET ISET2 VEXT GND VREF HILO Power sup ply #2 I /ACDRV /BATDRV CE P...

Page 6 - Procedure; AC Adapter Detection Threshold; Measure; Charge Current and AC Current Regultion (DPM); Figure 1

Test Summary www.ti.com 2.4 Procedure 2.4.1 AC Adapter Detection Threshold 1. Make sure EQUIPMENT SETUP steps are followed. Turn on PS#2.2. Turn on PS#1 Measure → V(J5(SYS)) = 0 ± 500mV Measure → V(TP(VREF)) = 0V ± 1000mV Measure → V(TP(REGN)) = 0V ± 500mV 3. Increase the output voltage on PS#1 unti...

Page 7 - Charger Cut-Off by Thermistor; Power Path Selection; PCB Layout Guideline

www.ti.com PCB Layout Guideline 2.4.4 Charger Cut-Off by Thermistor 1. Slowly increase the output voltage of PS2 until Ibat = 0 ± 10mA. Measure → V(J4(TS)) = 2.44V ± 200mV Observe → D7 (STAT1) off; D8 (STAT2) off. 2. Slowly decrease the output voltage of PS2 to 1.4V ± 0.1V. Measure → V(J4(TS)) = 1.4...

Page 8 - Bill of Materials, Board Layout and Schematics; Bill of Materials; Table 4. Bill of Materials

Bill of Materials, Board Layout and Schematics www.ti.com 4 Bill of Materials, Board Layout and Schematics 4.1 Bill of Materials Table 4. Bill of Materials bq24610-001 bq24617-002 Bq24630-003 bq24616-004 Value RefDes Description Size Part Number Mfr 1 0 0 0 bq24610RGE U1 Charger Controller IC QFN-24...

Page 11 - Board Layout

www.ti.com Board Layout 5 Board Layout Figure 2. Top Layer 11 SLUU396A – January 2010 – Revised July 2010 bq2461x/bq2463x EVM (HPA422) Multi-Cell Synchronous Switch-Mode Charger Copyright © 2010, Texas Instruments Incorporated

Page 12 - Layer

Board Layout www.ti.com Figure 3. 2 nd Layer 12 bq2461x/bq2463x EVM (HPA422) Multi-Cell Synchronous Switch-Mode Charger SLUU396A – January 2010 – Revised July 2010 Copyright © 2010, Texas Instruments Incorporated

Page 14 - Figure 5. Bottom Layer

Board Layout www.ti.com Figure 5. Bottom Layer 14 bq2461x/bq2463x EVM (HPA422) Multi-Cell Synchronous Switch-Mode Charger SLUU396A – January 2010 – Revised July 2010 Copyright © 2010, Texas Instruments Incorporated

Page 15 - Figure 6. Top Assembly

www.ti.com Board Layout Figure 6. Top Assembly 15 SLUU396A – January 2010 – Revised July 2010 bq2461x/bq2463x EVM (HPA422) Multi-Cell Synchronous Switch-Mode Charger Copyright © 2010, Texas Instruments Incorporated

Page 16 - Figure 7. Bottom Assembly

Board Layout www.ti.com Figure 7. Bottom Assembly 16 bq2461x/bq2463x EVM (HPA422) Multi-Cell Synchronous Switch-Mode Charger SLUU396A – January 2010 – Revised July 2010 Copyright © 2010, Texas Instruments Incorporated

Page 17 - Figure 8. Top Silkscreen

www.ti.com Board Layout Figure 8. Top Silkscreen 17 SLUU396A – January 2010 – Revised July 2010 bq2461x/bq2463x EVM (HPA422) Multi-Cell Synchronous Switch-Mode Charger Copyright © 2010, Texas Instruments Incorporated

Page 18 - Figure 9. Bottom Silkscreen

Board Layout www.ti.com Figure 9. Bottom Silkscreen 18 bq2461x/bq2463x EVM (HPA422) Multi-Cell Synchronous Switch-Mode Charger SLUU396A – January 2010 – Revised July 2010 Copyright © 2010, Texas Instruments Incorporated

Page 19 - Schematics

www.ti.com Schematics 6 Schematics Figure 10. bq2461x/bq2463x EVM Schematic 19 SLUU396A – January 2010 – Revised July 2010 bq2461x/bq2463x EVM (HPA422) Multi-Cell Synchronous Switch-Mode Charger Copyright © 2010, Texas Instruments Incorporated

Page 21 - IMPORTANT NOTICE; Products

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 shouldobtain the l...