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User's Guide

SLVU274C–November 2008–Revised May 2010

bq24072/3/4/5/9(T) and bq24230/2 1.5-A Single-Chip Li-Ion

and Li-Polymer Charge Management IC EVM

This user’s guide describes the bq24072/3/4/5/9(T) and bq24230/2 ( bqTINY-III™) evaluation module

(EVM). The EVM provides a convenient method for evaluating the performance of a charge management

and system power solution for portable applications using the bq24072/3/4/5/9(T) and bq24230/2 product

families. A completely designed and tested module is presented. The charger is designed to deliver up to

1.5 A of continuous current to the system or charger for one-cell Li-ion or Li-polymer applications (see the

data sheet for correct device) using a dc power supply. The charger is programmed from the factory to

deliver 0.9 A of charging current. This EVM was designed as a stand-alone evaluation module, but it also

can be interfaced with the system and host via the connectors and headers.

Contents

1 Introduction .................................................................................................................. 2

2 Considerations When Testing and Using bq24072/3/4/5/9(T) and bq24230/2 ICs ................................ 2

3 Performance Specification Summary ..................................................................................... 3

4 Test Summary ............................................................................................................... 3

5 Schematic .................................................................................................................... 7

6 Physical Layouts ............................................................................................................ 8

7 Bill of Materials ............................................................................................................. 11

8 References ................................................................................................................. 14

List of Figures

1 Test Diagram ................................................................................................................ 4

2 Modes of Operation Tested in Steps 11 Through 13 .................................................................. 6

3 Charger Profile With EN1 = VSS and EN2 = HI, Programmed by ISET............................................. 6

4 Charge Enabled, Pulled High, Then Low – Disables Charge ......................................................... 7

5 Top Assembly View......................................................................................................... 8

6 Board Layout – Top Etch Layer........................................................................................... 9

7 Board Layout – Bottom Etch Layer ..................................................................................... 10

List of Tables

1 Ordering Information........................................................................................................ 2

2 Performance Specification Summary for bq24072/3/4/5/9(T) and bq24230/2 EVMs .............................. 3

3 bq240xx ...................................................................................................................... 4

4 HPA282B Bill of Materials ............................................................................................... 11

5 HPA282B Bill of Materials (Continued) ................................................................................. 12

6 HPS252B Bill of Materials ................................................................................................ 13

7 HPA502A Bill of Materials ................................................................................................ 14

SLVU274C–November 2008–Revised May 2010 bq24072/3/4/5/9(T) and bq24230/2 1.5-A Single-Chip Li-Ion —and Li-Polymer

Charge Management IC EVM

Summary of content (17 pages)

PAGE 1
User's Guide SLVU274C – November 2008 – Revised May 2010 bq24072/3/4/5/9(T) and bq24230/2 1.5-A Single-Chip Li-Ion and Li-Polymer Charge Management IC EVM This user’s guide describes the bq24072/3/4/5/9(T) and bq24230/2 ( bqTINY-III™) evaluation module (EVM). The EVM provides a convenient method for evaluating the performance of a charge management and system power solution for portable applications using the bq24072/3/4/5/9(T) and bq24230/2 product families.
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Introduction 1 www.ti.com Introduction The bq2407x and bq2432x powers the system while independently charging the battery. This feature reduces the charge and discharge cycles on the battery, allows for proper charge termination, and allows the system to run with an absent or defective battery pack. This feature also allows for the system to instantaneously turn on from an external power source even when using a deeply discharged battery pack.
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Performance Specification Summary www.ti.com The two potential sources to power the system (VOUT) are the input source and the battery (adapter or USB port). The IC is designed to power the system continuously. The battery, in most cases, is the last line of backup. If the adapter/USB input is not available (or disabled), the battery connects to the system.
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Test Summary www.ti.com Table 3. bq240xx Jumper '72 '73 or '230 '74 or '232 '75 JMP1 RES–TMR RES–TMR RES–TMR RES–TMR JMP2 TD–Vss TD–Vss TD–Vss TD–Vss JMP3 CE–Vss CE–Vss CE–Vss CE–Vss JMP4 EN2–HI EN2–HI EN2–HI EN2–HI JMP5 EN1–Vss EN1–Vss EN1–Vss EN1–Vss CH 2 R8-ILIM 5.25 VDC J1 IN GND bq24072/3/4/5 EVM HPA282 - UUT or bq24079 (T) P/S #1 CH 1 TMR EN1 JMP5 EN2 JMP2 R10-ITERM R11-ISET CE JMP3 J3 4.
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Test Summary www.ti.com EN1/2 modes of operation. 11. SET JMP4 (EN2) to VSS. Verify that the input current is less than 500 mA (USB 500-mA mode). If the input current is restricted due to USB mode, or if the adapter is current limiting, the OUT pin drops in voltage and enters the DPM mode, if the system current is less than the restricted input current. This IC must be in DPM mode with the system voltage at the DPM 12. Set JMP5 (EN1) to VSS and verify USB 100-mA mode.
PAGE 6
Test Summary www.ti.com Vin Vout Normal Mode DPPM Mode Vbat Suspend Battery Supplement Mode BAT Current - Vbat 0.1 W EN2 ->HI USB 500 EN ->VSS USB100 Chip Disable t - Time - 1 ms/div Figure 2. Modes of Operation Tested in Steps 11 Through 13 Vin Vout Voltage Reg Vbat Fast-Charge-CC OUT ss BAT Current - Vbat 0.1 W Pre-Charge Termination t - Time - 1 ms/div Figure 3. Charger Profile With EN1 = VSS and EN2 = HI, Programmed by ISET 6 bq24072/3/4/5/9(T) and bq24230/2 1.
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Schematic www.ti.com Vin Vout Vbat Vbat_0.1 W CE (Charge Enable) pin toggled t - Time - 1 ms/div Figure 4. Charge Enabled, Pulled High, Then Low – Disables Charge 5 Schematic The bq24072/3/4/5/9(T) and bq24230/2 EVM schematic appears on the last page of this document. SLVU274C – November 2008 – Revised May 2010 bq24072/3/4/5/9(T) and bq24230/2 1.
PAGE 8
Physical Layouts 6 www.ti.com Physical Layouts This section contains the board layout and assembly drawings for the EVM. 6.1 Board Layout Figure 5 shows the top assembly view of the EVM. Figure 6 shows the top etch layer of the EVM and Figure 7 shows the bottom etch layer. Figure 5. Top Assembly View 8 bq24072/3/4/5/9(T) and bq24230/2 1.
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Physical Layouts www.ti.com Figure 6. Board Layout – Top Etch Layer SLVU274C – November 2008 – Revised May 2010 bq24072/3/4/5/9(T) and bq24230/2 1.
PAGE 10
Physical Layouts www.ti.com Figure 7. Board Layout – Bottom Etch Layer 10 bq24072/3/4/5/9(T) and bq24230/2 1.
PAGE 11
Bill of Materials www.ti.com 7 Bill of Materials Table 4. HPA282B Bill of Materials -001 -002 -003 -004 RefDes Value Description SIZE Part Number MFR 2 2 2 2 C1, C4 10uF Capacitor, Ceramic, 10-uF, 25-V, X5R, 20% 1206 ECJ-3YB1E106M Panasonic 2 2 2 2 C2, C3 10uF Capacitor, Ceramic, 10-uF, 6.3-V, X5R, 20% 0805 ECJ-2FB0J106M Panasonic 1 1 1 1 D1 Red Diode, LED, Red, 1.8-V, 20-mA, 20-mcd 0603 LTST-C190CKT Liteon 1 1 1 1 D2 Green Diode, LED, Green, 2.
PAGE 12
Bill of Materials www.ti.com Table 5. HPA282B Bill of Materials (Continued) -005 -006 RefDes Value Description SIZE Part Number MFR 2 2 C1, C4 10uF Capacitor, Ceramic, 10-uF, 25-V, X5R, 20% 1206 ECJ-3YB1E106M Panasonic 2 2 C2, C3 10uF Capacitor, Ceramic, 10-uF, 6.3-V, X5R, 20% 0805 ECJ-2FB0J106M Panasonic 1 1 D1 Red Diode, LED, Red, 1.8-V, 20-mA, 20-mcd 0603 LTST-C190CKT Liteon 1 1 D2 Green Diode, LED, Green, 2.
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Bill of Materials www.ti.com Table 6. HPS252B Bill of Materials -007 RefDes Value Description Size Part Number MFR 2 C1, C4 10uF Capacitor, Ceramic, 10-uF, 25-V, X5R, 20% 1206 ECJ-3YB1E106M Panasonic 2 C2, C3 10uF Capacitor, Ceramic, 10-uF, 6.3-V, X5R, 20% 0805 ECJ-2FB0J106M Panasonic 1 D1 Red Diode, LED, Red, 1.8-V, 20-mA, 20-mcd 0603 LTST-C190CKT Liteon 1 D2 Green Diode, LED, Green, 2.1-V, 20-mA, 6-mcd 0603 LTST-C190GKT Liteon 1 D3 BZX84C6v2T Diode, Zener, 6.
PAGE 14
References www.ti.com Table 7. HPA502A Bill of Materials -001 -002 RefDes Value Description Size Part Number MFR 2 2 C1, C4 10µF Capacitor, Ceramic, 25-V, X5R, 20% 1206 ECJ-3YB1E106M Panasonic 2 2 C2, C3 10µF Capacitor, Ceramic, 6.3-V, X5R, 20% 0805 ECJ-2FB0J106M Panasonic 1 1 D1 Red Diode, LED, Red, 1.8-V, 20-mA, 20-mcd 0603 LTST-C190CKT Liteon 1 1 D2 Green Diode, LED, Green, 2.1-V, 20-mA, 6-mcd 0603 LTST-C190GKT Liteon 1 1 D3 BZX84C6v2T Diode, Zener, 6.
PAGE 15
PAGE 16
Evaluation Board/Kit Important Notice Texas Instruments (TI) provides the enclosed product(s) under the following conditions: This evaluation board/kit is intended for use for ENGINEERING DEVELOPMENT, DEMONSTRATION, OR EVALUATION PURPOSES ONLY and is not considered by TI to be a finished end-product fit for general consumer use. Persons handling the product(s) must have electronics training and observe good engineering practice standards.
PAGE 17
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 should obtain the latest relevant information before placing orders and should verify that such information is current and complete.