Texas Instruments bq2415 Series User manual

User's Guide
SLUU321B–June 2008–Revised May 2010
bq2415x YFF EVM
Contents
1 Introduction .................................................................................................................. 1
1.1 EVM Features ...................................................................................................... 1
1.2 General Description ................................................................................................ 2
1.3 I/O Description ...................................................................................................... 2
1.4 Control and Key Parameters Setting ............................................................................ 2
1.5 Recommended Operating Conditions ........................................................................... 2
2 Test Summary ............................................................................................................... 3
2.1 Definitions ........................................................................................................... 3
2.2 Equipment ........................................................................................................... 3
2.3 Equipment Setup ................................................................................................... 4
2.4 Procedure ........................................................................................................... 6
3 PCB Layout Guideline ...................................................................................................... 7
4 Bill of Materials, Board Layout and Schematics ........................................................................ 8
4.1 Bill of Materials ..................................................................................................... 8
4.2 Board Layout ...................................................................................................... 10
4.3 Schematic ......................................................................................................... 12
List of Figures
1 Connections of the HPA172 Kit........................................................................................... 4
2 Original Test Setup for HPA256 (bq2415x EVM)....................................................................... 5
3 The Main Window of the bq2415x Evaluation Software (For bq24150/1/2/0A/1A)................................. 5
4 The Main Window of the bq24153_6_8 Evaluation Software for bq24153/6/8 ..................................... 6
5 Test setup for HPA256 .................................................................................................... 7
6 Top Layer................................................................................................................... 10
7 Bottom Layer............................................................................................................... 10
8 Top Assembly.............................................................................................................. 11
9 Top Silk ..................................................................................................................... 11
List of Tables
1 Factory Jumper Settings ................................................................................................... 4
1 Introduction
1.1 EVM Features
• Evaluation Module For BQ2415x
• High Efficiency Fully Integrated NMOS-NMOS Synchronous Buck Charger With 3MHz Frequency
• Integrated Power FETs for Up To 1.25-A Charge Rate
• Programmable Battery Voltage, Charge Current, and Input Current via I2C Interface
• Input Operating Range 4 V–6 V
• Boost Mode Operation for USB OTG
1
SLUU321B–June 2008–Revised May 2010 bq2415x YFF EVM
Copyright © 2008–2010, Texas Instruments Incorporated

Introduction www.ti.com
• LED Indication for Status Signals
• Test Points for Key Signals Available for Testing Purpose. Easy Probe Hook-up
• Jumpers Available. Easy to Change Connections.
1.2 General Description
The bq2415x evaluation module is a complete charger module for evaluating compact, flexible,
high-efficiency, USB-friendly switch-mode charge management solution for single-cell Li-ion and
Li-polymer batteries used in a wide range of portable applications.
The bq2415x integrates a synchronous PWM controller, power MOSFETs, input current sensing,
high-accuracy current and voltage regulation, and charge termination, into a small WCSP package.
The charge parameters can be programmed through an I2C interface.
For details, see the bq2415x data sheets (SLUS824,SLUS847,SLUSA27, and SLUS931).
1.3 I/O Description
Jack Description
J1–DC+ AC adapter or USB, positive output
J1–DC– AC adapter or USB, negative output
J2–BAT– Battery negative terminal, connect to DC-
J2-AUXPWR/CD Connect to AUXPWR pin or CD pin
J2-BAT+ Charger positive output, connect to CSOUT pin
J3–SCL I2C clock, connect to SCL pin
J3–SDA I2C data, connect to SDA pin
J3–DC– AC adapter or USB, negative output
J4–STAT Status output, can be connected to STAT pin by JMP1 set to EXT (2-3)
J4–OTG/SLRST Connect to OTG/SLRST pin
J4–DC– AC adapter or USB, negative output
1.4 Control and Key Parameters Setting
Jack Description Factory Setting
LED 1-2: Connect STAT pin to LED on EVM
JMP1 Jumper On LED (1-2)
EXT 2-3: Connect STAT pin to J4-1
HI 1-2: OTG or SLRST high (input or battery voltage)
JMP2 LO 2-3: OTG or SLRST low (ground) See Table 1
JMP3 J2-BAT+ connect to J2-AUXPWR/CD
JMP4 AUXPWR/CD pin connect to high or low or float
JMP5 OTG/SLRST pin 10k resistor to ground or float Jumper ON
1.5 Recommended Operating Conditions
Min Typ Max Unit Notes
Supply voltage, VIN Input voltage from ac adapter input 4 5 6 V
Battery voltage, VBAT Voltage applied at VBAT terminal of J8 0 3-4.2 4.44 V
Supply current, IAC Maximum input current from ac adapter input 0 0.1–0.5 1.5 A
Charge current, Ichrg Battery charge current 0.55 0.7 1.25 A
Operating junction temperature range, TJ0 125 °C
2bq2415x YFF EVM SLUU321B–June 2008–Revised May 2010
Copyright © 2008–2010, Texas Instruments Incorporated

www.ti.com Test Summary
2 Test Summary
2.1 Definitions
This procedure details how to configure the HPA256 evaluation board. On the test procedure the following
naming conventions are followed. Refer to the HPA256 schematic for details.
VXXX : External voltage supply name (VADP, VBT, VSBT)
LOADW: External load name (LOADR, LOADI)
V(TPyyy): Voltage at internal test point TPyyy. For example, V(TP12) means the voltage at
TP12.
V(Jxx): Voltage at jack terminal Jxx
V(TP(XXX)): Voltage at test point “XXX”. For example, V(ACDET) means the voltage at the test
point which is marked as “ACDET”.
V(XXX, YYY): Voltage across point XXX and YYY.
I(JXX(YYY)): Current going out from the YYY terminal of jack XX.
Jxx(BBB): Terminal or pin BBB of jack xx
Jxx ON : Internal jumper Jxx terminals are shorted
Jxx OFF: Internal jumper Jxx terminals are open
Jxx (-YY-) ON: Internal jumper Jxx adjacent terminals marked as “YY” are shorted
Measure: →A,B Check specified parameters A, B. If measured values are not within specified limits
the 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 Equipment
2.2.1 POWER SUPPLIES
Power Supply #1 (PS#1): a power supply capable of supplying 5-V at 2-A is required.
2.2.2 LOAD #1
A 10V (or above), 2A (or above) electronic load that can operate at constant current mode.
2.2.3 LOAD #2
A HP 6060B 3-60V/0–60A, 300W system DC electronic load.
Or: equivalent
2.2.4 METERS
Four Fluke 75, (equivalent or better)
Or: Two equivalent voltage meters and two equivalent current meters. The current meters must be able to
measure 2A current.
2.2.5 COMPUTER
A computer with at least one USB port and a USB cable. The bq2415x evaluation software must be
properly installed.
2.2.6 HPA172 COMMUNICATION KIT
A HPA172 USB to I2C communication kit.
3
SLUU321B–June 2008–Revised May 2010 bq2415x YFF EVM
Copyright © 2008–2010, Texas Instruments Incorporated

To
Computer
USB port
USB Interface
Adapter
I/O
USB
Texas Instruments
© 2006
10-pin
Ribbon
Cable
To EVM
Test Summary www.ti.com
2.2.7 SOFTWARE
For -001, -002, -003, -004, -005 unzip BQ2415xSetup.zip and double click on the “SETUP.EXE” file.
Follow the installation steps.
For -006, -007, -008 unzip BQ24153_6_8Setup.zip and double click on the “SETUP.EXE” file. Follow the
installation steps.
2.3 Equipment Setup
(A) Set the power supply #1 for 5V ± 100mV DC, 2.0 ± 0.1A current limit and then turn off supply.
(B) Connect the output of power supply #1 in series with a current meter (multimeter) to J1 (DC+, DC–).
(C) Connect a voltage meter across J1 (DC+, DC–).
(D) Connect the Load #2 in series with a current meter (multimeter) to J2 (BAT+, BAT–). Make sure a
voltage meter is connected across J2 (BAT+, BAT–). Turn on the Load #2. Use the constant voltage
mode. Set the output voltage to 2.5V.
(E) Turn off Load #2.
(F) Connect J5 to HPA172 kit by 10-pin ribbon cable. Connect the USB port of the HPA172 kit to the USB
port of the computer. The connections are shown in Figure 1.
Figure 1. Connections of the HPA172 Kit
(G) Installed jumpers per Table 1
Table 1. Factory Jumper Settings
Spin JMP1 JMP2 JMP3 JMP4 JMP5
HPA256-001 (-LED-) ON (-LO-) ON ON OFF ON
(bq24150)
HPA256-002 (-LED-) ON (-LO-) ON ON OFF ON
(bq24151)
HPA256-003 (-LED-) ON (-LO-) ON ON OFF ON
(bq24152)
HPA256-004 (-LED-) ON (-LO-) ON ON OFF ON
(bq24150A)
HPA256-005 (-LED-) ON (-LO-) ON ON OFF ON
(bq24151A)
HPA256-006 (-LED-) ON (-LO-) ON OFF (-LO-) ON ON
(bq24153)
HPA256-007 (-LED-) ON (-HI-) ON OFF (-LO-) ON ON
(bq24156)
HPA256-008 (-LED-) ON (-LO-) ON OFF (-LO-) ON ON
(bq24158)
4bq2415x YFF EVM SLUU321B–June 2008–Revised May 2010
Copyright © 2008–2010, Texas Instruments Incorporated

BQ2415x EVM
DC+
J 1
DC -
BAT+
SC L
BAT -
APPLICATION
CIRCUIT
U1
J3
J5
J 4
J2
D1 JMP1 JMP2
JMP3
AUXPWR
CD
SDA DC- DC- ST AT OTG S LR S T
JMP5
JMP4
V
Iin I
Power
supply #1
V
ILoad
#2
Ichrg
USB
Cable HPA172 Ribbon Cable
www.ti.com Test Summary
(H) After the steps above, the test setup for HPA272 is shown in Figure 2
Figure 2. Original Test Setup for HPA256 (bq2415x EVM)
(I) Turn on the computer.
• For -001, -002, -003, -004, -005, open the bq2415x evaluation software. The main window of the
software is shown in Figure 3.
• For -006, -007, -008, open the bq24153_6_8 evaluation software. Select part number (bq24153,
bq24156, and bq24158) and click GO button. The main window of the software is show in
Figure 4.
Figure 3. The Main Window of the bq2415x Evaluation Software (For bq24150/1/2/0A/1A)
5
SLUU321B–June 2008–Revised May 2010 bq2415x YFF EVM
Copyright © 2008–2010, Texas Instruments Incorporated

Test Summary www.ti.com
Figure 4. The Main Window of the bq24153_6_8 Evaluation Software for bq24153/6/8
2.4 Procedure
2.4.1 Charge Voltage and Current Regulation
1. Make sure the EQUIPMENT SETUP steps are followed. Turn on PS#1.
2. Software setup:
• For -001, -002, -003, -004, -005, click Immediate Update Disabled button. It changes to Immediate
Update Enabled. Check Auto Reset Enable, set Rate to 5 seconds. Check Periodic Updates, set
Rate to 1 second. Make sure Operation Mode is Charger Mode. Uncheck Charge Current
Termination. Check STAT Pin. Select Battery Regulation Voltage to 4.20V.
• For -006, -007, -008, Make sure Immediate Updates is enabled. Check Periodic Resets, set Rate
to 5 seconds. Check Periodic Reads, set Rate to 1 second. Make sure Operation Mode is Charger
Mode. Uncheck Charge Current Termination. Check STAT Pin. Select Charge Current Sense
Voltage to Normal. Select Battery Regulation Voltage to 4.20V.
Measure →V(J2(VBAT+, VBAT–)) = 4.2 ± 100mV
Observe →D1 is on.
3. Enable Load #2.
Measure →V(J2(VBAT+, VBAT–)) = 2.5 ± 100mV
Measure →Ichrg = 160mA ± 40mA
Measure →Iin = 93mA ± 5mA
4. Select Charge Current to 950mA, select Input Current Limit to 500mA.
Measure →Ichrg = 750mA ± 100mA
Measure →Iin = 475mA ± 25mA
5. Check Disable Charger. Turn off PS#1, turn off Load #2 and disconnect
6bq2415x YFF EVM SLUU321B–June 2008–Revised May 2010
Copyright © 2008–2010, Texas Instruments Incorporated

BQ2415x EVM
DC+
J 1
DC -
BAT+
SC L
BAT -
APPLICATION
CIRCUIT
U1
J3
J5
J 4
J2
D1 JMP1 JMP2
JMP3
AUXPWR
CD
SDA DC- DC- ST AT OT G SLRS T
JMP5
JMP4
V
I
Power
supply #1
Load
#1
Io
I
I in
USB
Cable HPA172 Ribbon Cable
V
www.ti.com PCB Layout Guideline
2.4.2 Boost Function (For -001, -002, -003, -004, -005, -006, -008 only)
1. Adjust PS#1 output to 3.7V and disable the output. Connect the PS#1 in series with a current meter
(multimeter) to J2 (BAT+, BAT–). Make sure a voltage meter is connected across J2 (BAT+, BAT–).
2. Set the Load #1 current to 200mA ± 20mA but disable the output. Connect the output of the Load #1 in
series with a current meter (multimeter) to J1 (DC+, DC–). Make sure a voltage meter is connected
across J1 (DC+, DC–). The setup is now like Figure 5 for HPA256.
Figure 5. Test setup for HPA256
3. Turn on PS#1 output
4. Software setup: Change Operation Mode to Boost Mode.
Measure →V(J1(DC+, DC–))=5V ± 0.2V
5. Enable Load #1.
Measure →V(J1(DC+, DC–))=5V ± 0.2V
Measure →Iin = 330mA ± 40mA
Measure →Io = 200mA ± 20mA
3 PCB Layout Guideline
1. To obtain optimal performance, the power input capacitors, connected from input to PGND, should be
placed as close as possible to the IC.
2. The output inductor should be placed close to the IC and the output capacitor connected between the
inductor and PGND of the IC. The intent is to minimize the current path loop area from the SW pin
through the LC filter and back to the PGND pin. To prevent high frequency oscillation problems, proper
layout to minimize high frequency current path loop is critical.
3. The sense resistor should be adjacent to the junction of the inductor and output capacitor. Route the
sense leads connected across the RSNS back to the IC, close to each other (minimize loop area) or
on top of each other on adjacent layers (do not route the sense leads through a high-current path).
4. Place all decoupling capacitor close to their respective IC pin and as close as to PGND (do not place
components such that routing interrupts power stage currents). All small control signals should be
routed away from the high current paths.
5. The PCB should have a ground plane (return) connected directly to the return of all components
through vias (two vias per capacitor for power-stage capacitors, two vias for the IC PGND, one via per
capacitor for small-signal components). A star ground design approach is typically used to keep circuit
block currents isolated (high-power/low-power small-signal) which reduces noise-coupling and
ground-bounce issues. A single ground plane for this design gives good results. With this small layout
and a single ground plane, there is no ground-bounce issue, and having the components segregated
minimizes coupling between signals.
6. The high-current charge paths into VBUS, PMID and from the SW pins must be sized appropriately for
the maximum charge current in order to avoid voltage drops in these traces. The PGND pins should be
connected to the ground plane to return current through the internal low-side FET.
7
SLUU321B–June 2008–Revised May 2010 bq2415x YFF EVM
Copyright © 2008–2010, Texas Instruments Incorporated

Bill of Materials, Board Layout and Schematics www.ti.com
4 Bill of Materials, Board Layout and Schematics
4.1 Bill of Materials
'24150- '24151- bq241 '24150 '24151 '24153- '24156- '24158- RefDes Value Description Size Part Number MFR
001 002 52-003 A-004 A-005 006 007 008
1 1 1 1 1 1 1 1 C1 1uF Capacitor, Ceramic, 603 GRM188R61C105K muRata
X5R, 16V, +-10%
1 1 1 1 1 1 1 1 C2 4.7uF Capacitor, Ceramic, 805 GRM21BR71C475K muRata
X7R, 16V, +-10%
2 2 2 2 2 2 2 2 C3, C9 10uF Capacitor, Ceramic, 603 GRM188R60J106M muRata
X5R, 6.3V, +-20%
2 2 2 2 2 2 2 2 C4, C5 1uF Capacitor, Ceramic, 402 GRM155R61A105K muRata
X5R, 10V, +-10%
1 1 1 1 1 1 1 1 C6 10nF Capacitor, Ceramic, 402 GRM155R61C103K muRata
X5R, 16V, +-10%
2 2 2 2 2 2 2 2 C7, C8 0.1uF Capacitor, Ceramic, 402 GRM155R71C104K muRata
X7R, 16V, +-10%
1 1 1 1 1 1 1 1 D1 Green Diode, LED, Green, 603 LTST-C190GKT Liteon
2.1-V, 20-mA, 6-mcd
1 1 1 1 1 1 1 1 D2 BAT54C Diode, Dual Schottky, SOT23 BAT54C Vishay-Liteon
200-mA, 30-V
1 1 1 1 1 1 1 1 J1 ED1514/2DS Terminal Block, 2-pin, 0.27 x 0.25 inch ED1514/2DS OST
6-A, 3.5mm
3 3 3 3 3 3 3 3 J2, J3, J4 ED1515/3DS Terminal Block, 3-pin, 0.41 x 0.25 inch ED1515/3DS OST
6-A, 3.5mm
1 1 1 1 1 1 1 1 J5 2510- Connector, Male 0.338 x 0.788 2510-6002UB 3M
6002UB Straight 2x5 pin, 100mil inch
spacing, 4 Wall
3 3 3 3 3 3 3 3 JMP1, PTC03SAAN Header, 3-pin, 100mil 0.100 inch x 3 PTC03SAAN Sullins
JMP2, spacing, (36-pin strip)
JMP4
2 2 2 2 2 2 2 2 JMP3, PTC02SAAN Header, 2-pin, 100mil 0.100 inch x 2 PTC02SAAN Sullins
JMP5 spacing, (36-pin strip)
4 4 4 4 4 4 4 4 929950-00 Shorting jumpers, 2-pin, 929950-00 3M/ESD
100mil spacing,
1 1 1 1 1 1 1 1 L1 1.0uH 2.5mmx2mm, 1.0uH, 0.11x0.09 inch "LQM2HPN1R0MJ0 or muRata or
+/-30%, 1.5A MIPS2520D1R0 or FDK or
MDT2520-CN1R0M or TOKO or
CP1008" Inter-Technical
1 1 1 1 1 1 1 1 R1 0.068 Resistor, Chip, 402 ERJ-2BWJR068X Panasonic
68mohm, 125mW, 5%
8bq2415x YFF EVM SLUU321B–June 2008–Revised May 2010
Copyright © 2008–2010, Texas Instruments Incorporated

www.ti.com Bill of Materials, Board Layout and Schematics
'24150- '24151- bq241 '24150 '24151 '24153- '24156- '24158- RefDes Value Description Size Part Number MFR
001 002 52-003 A-004 A-005 006 007 008
1 1 1 1 1 1 1 1 R2 5.1k Resistor, Chip, 603 Std Std
5.1k-Ohms, 1/16-W, 5%
1 1 1 1 1 1 1 1 R3 10k Resistor, Chip, 603 Std Std
10k-Ohms, 1/16-W, 5%
1 1 1 1 1 1 1 1 R4 200 Resistor, Chip, 603 Std Std
200-Ohms, 1/16-W, 5%
1 1 1 1 1 1 1 1 R5 200 Resistor, Chip, 603 Std Std
200-Ohms, 1/16-W, 5%
1 0 0 0 0 0 0 0 U1 BQ24150YF IC, Battery Charger for WCSP BQ24150YFF TI
F Single-Cell Li-Ion and
Li-Polymer Battery
0 1 0 0 0 0 0 0 U1 BQ24151YF IC, Battery Charger for WCSP BQ24151YFF TI
F Single-Cell Li-Ion and
Li-Polymer Battery
0 0 1 0 0 0 0 0 U1 BQ24152YF IC, Battery Charger for WCSP BQ24152YFF TI
F Single-Cell Li-Ion and
Li-Polymer Battery
0 0 0 1 0 0 0 0 U1 BQ24150AY IC, Battery Charger for WCSP BQ24150AYFF TI
FF Single-Cell Li-Ion and
Li-Polymer Battery
0 0 0 0 1 0 0 0 U1 BQ24151AY IC, Battery Charger for WCSP BQ24151AYFF TI
FF Single-Cell Li-Ion and
Li-Polymer Battery
0 0 0 0 0 1 0 0 U1 BQ24153YF IC, Battery Charger for WCSP BQ24153YFF TI
F Single-Cell Li-Ion and
Li-Polymer Battery
0 0 0 0 0 0 1 0 U1 BQ24156YF IC, Battery Charger for WCSP BQ24156YFF TI
F Single-Cell Li-Ion and
Li-Polymer Battery
0 0 0 0 0 0 0 1 U1 BQ24158YF IC, Battery Charger for WCSP BQ24158YFF TI
F Single-Cell Li-Ion and
Li-Polymer Battery
1 1 1 1 1 1 1 1 -- HPA256 PCB, 2.0 In x 2.0 In x PCB Any
0.031 In
9
SLUU321B–June 2008–Revised May 2010 bq2415x YFF EVM
Copyright © 2008–2010, Texas Instruments Incorporated

Bill of Materials, Board Layout and Schematics www.ti.com
4.2 Board Layout
Figure 6. Top Layer
Figure 7. Bottom Layer
10 bq2415x YFF EVM SLUU321B–June 2008–Revised May 2010
Copyright © 2008–2010, Texas Instruments Incorporated