Texas Instruments BQ24450EVM - Manuals

Page 2 - Introduction; EVM Features; spacer; Jumper Description

Introduction www.ti.com 1 Introduction 1.1 EVM Features • Evaluation module for bq24450 (HPA691) • Charge controller for lead-acid batteries • Constant current and constant voltage modes • Accommodates external transistor in DPAK or TO-220 package • Programmable charge current • Pre-Charge for deepl...

Page 3 - Recommended Operating Conditions; Table 2. Recommended Operating Conditions; Equipment; Power Supplies; Figure 2; Meters; Equipment Setup; The original test setup of HPA691 is shown in

www.ti.com Equipment 1.4 Recommended Operating Conditions Table 2. Recommended Operating Conditions Symbol Description Min Typ Max Unit Vin, J1 Supply Voltage 9.5 10.0 10.5 V Vout, J4 Battery Voltage (3-cell lead-acid battery) 4 7.5 V Iin Supply Current 0 0.5 A Iout Charge Current 0 0.5 A 2 Equipmen...

Page 4 - Figure 2. Battery Load Circuit – PR1010-2; Procedure; Max Charge; There should be no charge current in this condition.

Procedure www.ti.com Replacement circuit for a 3-cell lead acid battery. BAT+ to BAT– voltage tracks the power supply inputvoltage, minus 1 diode drop Figure 2. Battery Load Circuit – PR1010-2 4 Procedure 4.1 Pre-charge Turn on PS #1, preset to 10 VDC. Verify voltage on VM #1. Turn on PS #2, preset ...

Page 5 - Functions and Features; Changing Output Voltage and Charge Current; WARNING; Q1 and the surrounding area of the PCB may become hot.; Changing the value of Itaper; Figure 3. Calculating the Value of I

www.ti.com Functions and Features 5 Functions and Features 5.1 Changing Output Voltage and Charge Current This EVM is configured to charge a 3-Cell Lead Acid Battery with a maximum charge current of 450 mA.The EVM can be altered to charge lower or higher voltage batteries and can also be altered to ...

Page 6 - Options for External Transistor; resistor is; Other Options; PCB Layout Guideline

PCB Layout Guideline www.ti.com 5.2 Options for External Transistor Using a Transistor in a TO-220 packageThe EVM is populated with a DPAK transistor for Q1. However, if desired, a TO-220 transistor can beused instead. Three holes have been placed in the PCB in parallel with the DPAK pad. Remove the...

Page 7 - Bill of Materials, Board Layouts and Schematic; Bill of Materials; Table 3. Bill of Materials

www.ti.com Bill of Materials, Board Layouts and Schematic 7 Bill of Materials, Board Layouts and Schematic 7.1 Bill of Materials Table 3. Bill of Materials Reference Value Description Size Part Number MFR Designator C1, C4 Open Capacitor, Ceramic 1206 Std Std C2, C5 1.0µF Capacitor, Ceramic, 25V, X5...

Page 8 - Board Layout; Figure 4. Top Assembly Layer

Bill of Materials, Board Layouts and Schematic www.ti.com 7.2 Board Layout Figure 4. Top Assembly Layer Figure 5. Top PCB Layer 8 bq24450EVM SLUU464 – November 2010 Submit Documentation Feedback © 2010, Texas Instruments Incorporated

Page 9 - Figure 6. Bottom PCB Layer; Schematic

www.ti.com Bill of Materials, Board Layouts and Schematic Figure 6. Bottom PCB Layer 7.3 Schematic Figure 7. bq24450 EVM Schematic 9 SLUU464 – November 2010 bq24450EVM Submit Documentation Feedback © 2010, Texas Instruments Incorporated

Page 11 - IMPORTANT NOTICE

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...