Texas Instruments bq24650 User Manual Download Page 17

Page: 17 / 19

www.ti.com

Bill of Materials, Board Layout, and Schematic

4.3

Schematic

Figure 8. bq24650EVM Schematic

SLUU444A – August 2010 – Revised October 2010

bq24650EVM Synchronous, Switch-Mode, Battery Charge Controller for Solar

Power

Summary of Contents for bq24650

Page 1: ...Summary 5 2 1 Definitions 5 2 2 Safety 5 2 3 Quality 5 2 4 Apparel 5 2 5 Equipment 5 2 6 Equipment Setup 6 2 7 Procedure 7 3 PCB Layout Guideline 9 4 Bill of Materials Board Layout and Schematic 10 4...

Page 2: ...nt current and constant voltage Charge is terminated when the current reaches one tenth of the fast charge rate A programmable fast charge timer provides a safety backup The precharge timer is fixed a...

Page 3: ...components Operating junction temperature range TJ 0 125 C The bq24650EVM board requires a regulated supply approximately 1 V minimum above the regulated voltage of the battery pack to a maximum inpu...

Page 4: ...RN The full scale differential voltage between SRP and SRN is fixed at 40 mV 3 It is set at 2 Adc from the factory 4 bq24650EVM Synchronous Switch Mode Battery Charge Controller for Solar SLUU444A Aug...

Page 5: ...e unit under test has failed Observe A B Observe if A B occur If they do not occur the unit under test has failed Assembly drawings have location for jumpers test points and individual components 2 2...

Page 6: ...A current 2 6 Equipment Setup 1 Set the power supply 1 PS 1 for 21 V 500 mVdc 2 5 A 0 1 A current limit and then turn off supply 2 Connect the output of PS 1 in series with a current meter multimeter...

Page 7: ...OAD 2 to be 10 5 V Measure I J2 VOUT 2 A 200 mA Observe D4 STAT1 ON D5 STAT2 OFF Open 2 3 of JP1 Measure I J2 VOUT 0 A 100 mA Observe D4 STAT1 OFF D5 STAT2 OFF Connect 2 3 of JP1 Internal TS Measure I...

Page 8: ...T decreases from 2 A toward 0 A while V J1 VIN become constant 17 8 V 500 mV Ensure that I J2 VOUT 0 A 100 mA and J2 VSYS 2 4 A 200 mA 2 7 7 Test Complete Turn off the power supply and remove all conn...

Page 9: ...ntact The area of this loop must be minimized The decoupling capacitors for these pins must be placed as close to the IC as possible 4 Decoupling capacitors for VREF VCC REGN must make the interconnec...

Page 10: ...erPak SI7288DP T1 Vishay Siliconix 1 Q2 2N7002 7 F MOSFET N ch 60V 115mA 1 2 SOT23 2N7002 7 F Diodes 2 R1 R2 3 9 Resistor Chip 1 4W 5 1206 STD STD 1 R3 10 Resistor Chip 1 8W 5 805 STD STD 0 R4 R8 Open...

Page 11: ...Schematic 4 2 Board Layout Figure 2 Top Layer 11 SLUU444A August 2010 Revised October 2010 bq24650EVM Synchronous Switch Mode Battery Charge Controller for Solar Power Submit Documentation Feedback C...

Page 12: ...ematic www ti com Figure 3 Second Layer 12 bq24650EVM Synchronous Switch Mode Battery Charge Controller for Solar SLUU444A August 2010 Revised October 2010 Power Submit Documentation Feedback Copyrigh...

Page 13: ...yout and Schematic Figure 4 Third Layer 13 SLUU444A August 2010 Revised October 2010 bq24650EVM Synchronous Switch Mode Battery Charge Controller for Solar Power Submit Documentation Feedback Copyrigh...

Page 14: ...ematic www ti com Figure 5 Bottom Layer 14 bq24650EVM Synchronous Switch Mode Battery Charge Controller for Solar SLUU444A August 2010 Revised October 2010 Power Submit Documentation Feedback Copyrigh...

Page 15: ...out and Schematic Figure 6 Top Assembly 15 SLUU444A August 2010 Revised October 2010 bq24650EVM Synchronous Switch Mode Battery Charge Controller for Solar Power Submit Documentation Feedback Copyrigh...

Page 16: ...matic www ti com Figure 7 Bottom Assembly 16 bq24650EVM Synchronous Switch Mode Battery Charge Controller for Solar SLUU444A August 2010 Revised October 2010 Power Submit Documentation Feedback Copyri...

Page 17: ...ematic 4 3 Schematic Figure 8 bq24650EVM Schematic 17 SLUU444A August 2010 Revised October 2010 bq24650EVM Synchronous Switch Mode Battery Charge Controller for Solar Power Submit Documentation Feedba...

Page 18: ...duct This notice contains important safety information about temperatures and voltages For additional information on TI s environmental and or safety programs please contact the TI application enginee...

Page 19: ...change without notice TI grants you permission to use these resources only for development of an application that uses the TI products described in the resource Other reproduction and display of thes...