Texas Instruments BQ24450EVM User Manual

User's GuideSLUU464–November 2010bq24450EVMThis user's guide describes the features and operation of the bq24450EVM Evaluation Module (EVM).

Evaluation Board/Kit Important NoticeTexas Instruments (TI) provides the enclosed product(s) under the following conditions:This evaluation board/kit

IMPORTANT NOTICETexas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications, enhancements, improveme

Introductionwww.ti.com1 Introduction1.1 EVM Features• Evaluation module for bq24450 (HPA691)• Charge controller for lead-acid batteries• Constant curr

www.ti.comEquipment1.4 Recommended Operating ConditionsTable 2. Recommended Operating ConditionsSymbol Description Min Typ Max UnitVin, J1 Supply Volt

Procedurewww.ti.comReplacement circuit for a 3-cell lead acid battery. BAT+ to BAT– voltage tracks the power supply inputvoltage, minus 1 diode dropFi

www.ti.comFunctions and Features5 Functions and Features5.1 Changing Output Voltage and Charge CurrentThis EVM is configured to charge a 3-Cell Lead A

PCB Layout Guidelinewww.ti.com5.2 Options for External TransistorUsing a Transistor in a TO-220 packageThe EVM is populated with a DPAK transistor for

www.ti.comBill of Materials, Board Layouts and Schematic7 Bill of Materials, Board Layouts and Schematic7.1 Bill of MaterialsTable 3. Bill of Material

Bill of Materials, Board Layouts and Schematicwww.ti.com7.2 Board LayoutFigure 4. Top Assembly LayerFigure 5. Top PCB Layer8bq24450EVM SLUU464–Novembe

www.ti.comBill of Materials, Board Layouts and SchematicFigure 6. Bottom PCB Layer7.3 SchematicFigure 7. bq24450 EVM Schematic9SLUU464–November 2010 b