User's Guide
SLUUA08A – March 2013 – Revised April 2013
bq2425xEVM-150, Single-Cell Li-Ion Switch-Mode Charger
This user's guide describes the characteristics, operation, and use of the bq24250EVM-150,
bq24251EVM-150, and bq24257EVM-150 evaluation modules (EVM). These EVMs enable test and
evaluation TI's bq24250, bq24251, and bq24257 devices. The bq2425x series are highly integrated,
single-cell, Li-Ion battery chargers targeted for space-limited, portable applications with high-capacity
batteries. This user's guide includes EVM specifications, the schematic diagram, test procedures, test
results, a bill of materials, and board layout.
1
2
3
4
5
6
7
Contents
Introduction .................................................................................................................. 2
EVM Considerations ........................................................................................................ 3
Recommended Operating Condition ..................................................................................... 3
Equipment and EVM Setup ................................................................................................ 4
4.1
Schematic ........................................................................................................... 4
4.2
I/O Description ...................................................................................................... 5
4.3
Test Points .......................................................................................................... 5
4.4
Pin Descriptions .................................................................................................... 6
4.5
Control and Key Parameters Setting ............................................................................ 6
Test Procedure .............................................................................................................. 7
5.1
Definition ............................................................................................................ 7
5.2
Recommended Test Equipment ................................................................................. 7
5.3
Software ............................................................................................................. 7
5.4
Recommended Test Equipment Set Up ........................................................................ 8
5.5
Recommended Test Procedure ................................................................................ 10
Test Results ................................................................................................................ 12
6.1
Output Regulation Ripple ........................................................................................ 12
6.2
Efficiency Data .................................................................................................... 12
6.3
Thermal Performance ............................................................................................ 13
Layout and Bill of Materials .............................................................................................. 13
7.1
Printed-Circuit Board Layout Guideline ........................................................................ 13
7.2
Layout .............................................................................................................. 14
7.3
Bill of Materials (BOM) ........................................................................................... 20
List of Figures
.............................................................................................
1
bq2425xEVM-150 Schematic
2
Original Test Setup ......................................................................................................... 8
3
Battery Emulator
4
Connector Kit ................................................................................................................ 9
5
Main Window of the bq2425xSW Evaluation Software ............................................................... 10
6
Output Regulation Ripple at ICHG = 1000 mA
12
7
Output Regulation Ripple at ICHG = 120 mA
12
8
9
10
11
...........................................................................................................
.......................................................................
.........................................................................
Efficiency Versus Output Current While in Battery Voltage Regulation (4.2V)” ...................................
Thermal Image .............................................................................................................
bq2425xEVM-150 Top Assembly .......................................................................................
bq2425xEVM-150 Top Silkscreen ......................................................................................
4
9
12
13
14
15
I2C is a trademark of NXP.
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1
Introduction
12
13
14
15
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............................................................................................
bq2425xEVM-150 Second Layer (Internal) Routine ..................................................................
bq2425xEVM-150 Third Layer (Internal) Routine ....................................................................
bq2425xEVM-150 Bottom Layer ........................................................................................
bq2425xEVM-150 Top Layer
16
17
18
19
List of Tables
1
1
Connector and Test Points ................................................................................................ 5
2
Test Points Description ..................................................................................................... 5
3
Pin Descriptions ............................................................................................................. 6
4
Control and Key Parameters .............................................................................................. 6
5
bq2425xEVM-150 Bill of Materials
.....................................................................................
20
Introduction
The bq24250, bq24251, and bq24257 devices are highly-integrated, single-cell, Li-Ion battery chargers
with integrated current sense resistors targeted for space-limited, portable applications with high-capacity
batteries. The single-cell charger has a single input that operates from either a USB port or AC wall
adapter for a versatile solution. BC1.2-compliant D+/D– detection allows for recognition of CDP, DCP,
SDP, and non-standard USB adapters. The use of an accessory dead-battery provision (DBP) pin allows
for the system to sync a dead battery state in order to enable/disable the BC1.2 detection in the case of
an external USB-PHI.
The bq24250, bq24251, and bq24257 devices have two modes of operation: 1) I2C™ mode, and 2)
standalone mode. In I2C mode, the host adjusts the charge parameters and monitors the status of the
charger operation. In standalone mode, the external resistor sets the input-current limit, and chargecurrent limit. Standalone mode also serves as the default settings when a DCP adapter is present. They
enter host mode while the I2C registers are accessed and the watchdog timer has not expired (if enabled).
The battery is charged in four phases: trickle charge, pre-charge, constant current and constant voltage. In
all charge phases, an internal control loop monitors the IC junction temperature and reduces the charge
current if the internal temperature threshold is exceeded.
The bq24250 and bq24251 have system power path management. This feature allows this device to
power the system from a high efficiency DC/DC converter while simultaneously and independently
charging the battery. The charger monitors the battery current at all times and reduces the charge current
when the system load requires current above the input current limit. This allows for proper charge
termination and enables the system to run with a defective or absent battery pack. Additionally, this
enables instant system turn-on even with a totally discharged battery or no battery. The power-path
management architecture also permits the battery to supplement the system current requirements when
the adapter cannot deliver the peak system currents. This enables the use of a smaller adapter.
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bq2425xEVM-150, Single-Cell Li-Ion Switch-Mode Charger
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EVM Considerations
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2
EVM Considerations
Refer to the data sheet for specific details on the charger ICs. The bq24250, bq24251, and bq24257
devices are featured with a high-efficiency switch-mode charger. It has integrated power FETs able to
charge at up to a 2-A charging rate, and an integrated 50-mA LDO. In I2C mode, the bq24250, bq24251,
and bq24257 devices have programmable battery charge voltage (VBATREG), charge current (ICHG), input
current limit (ILIM), and input over-voltage protection threshold (VOVP).
The charge current and the input current limit are programmed using external resistors (RISET and RILIM)
connected from the ISET and ILIM pins to ground. The range of these resistors can be found in the
datasheet. Both of these currents can be programmed up to 2 A. The bq24250, bq24251, and bq24257
devices also have complete system-level protection such as input undervoltage lockout (UVLO), input
over-voltage protection (OVP), battery OVP, sleep mode, thermal regulation and thermal shutdown,
voltage-based JEITA-compatible NTC monitoring input, and safety timer. PSE is also available – notify
your local TI representative.
3
Recommended Operating Condition
Specification
Test Condition
Min
Input DC voltage, VIN
Recommended input voltage range
4.35
Input current
Recommended input current range
Charge current
Fast charge current range
Output regulation voltage
Standalone mode or I2C default mode
Output regulation voltage
I2C host mode: operating in voltage regulation,
programmable range
LDO
LDO output voltage
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Typ
0.5
Max
Units
10.5
V
2
A
2
A
4.2
3.5
V
4.44
4.9
bq2425xEVM-150, Single-Cell Li-Ion Switch-Mode Charger
Copyright © 2013, Texas Instruments Incorporated
V
V
3
Equipment and EVM Setup
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4
Equipment and EVM Setup
4.1
Schematic
BAT
BAT
3
J5
BAT
GND
C4
J1
M ICRO -U SB
A1
D /EN 2
JP1
A2
CSIN /SYS
A3
SW
A4
IN
A5
D + /EN 1
B2
B3
IN
IN
SW
C4
IN
C5
IN
TS
BAT
BO O T
CSIN /SYS
VD PM
STAT
PM ID
CE
PG N D
D + /EN 1
SW
D -/EN 2
IN
ISET
GND
F5
GND
2
ILIM
F4
J7
F3
F2
SD A
F1
TP14
LD O
TS
E5
3
E4
VD PM
E3
J11
STAT
SCL E2
PG /IN T
CSIN /SYS
C3
1.0 µF
1.0 µF
SD A
BAT
C2
C1
C7
J3
PG N D
SW
IN
C1
CSIN /SYS
LD O
SW
B5
BAT
IN
GND
ILIM
CSIN /SYS
PG N D
B4
SW
J2
BAT
PG N D
B1
BAT
CSIN /SYS
3
J6
2
U1
BQ2425xYFF
IN
LD O
LD O
GND
SCL TP15
E1
C6
PG /IN T
D5
J12
1.0 µF
D4
CE
D3
D + /EN 1
D2
GND
C3
C2
1.0 µF
J13
0.033 µF
D -/EN 2
D1
ISET
CSIN /SYS
BQ2425XYFF
CSIN /SYS
J4
C5
J8
3
CSIN /SYS
GND
2
L1
J9
1.0 µH
ILIM
GND
ISET
J10
LO W
CE
1
LD O
H IG H
D -/EN 2
D -/EN 2
D + /EN 1
LO W
JP5
LD O
H IG H
JP2
H IG H
D + /EN 1 SCL
LO W JP6
LD O
SCL
LD O
H IG H
SD A
SD A
LO W
JP7
LD O
H IG H
CE
LO W
D + /EN 1
CE
_
1
R9
249
R8
267
JP8
JP9
D -/EN 2
JP3
JP10
TP9
R2
200
SCL
IN
R5
20.0 k
R10
274 k
SD A
TP1
LD O
VD PM
TS
TS
J15
D2
STAT
Var Fix
TS
R7
100 k
TP2
TP4
TP5
TP7
R1
200
J14
SW
D1
JP4 _
GND
R11
100 k
TP10
LD O
BAT
IN T
CSIN /SYS
IN
R6
20.0 k
R3
1.50 k
TP6
R4
1.50 k
TP11 TP12 TP13
TP8
TP3
K
ISET
1
2
3
N ot Installed
See U ser's guide for part usage
See U ser's guide for voltage ratings
STAT
PG /IN T
ILIM
VD PM
Figure 1. bq2425xEVM-150 Schematic
4
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Equipment and EVM Setup
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4.2
I/O Description
This EVM is designed to operate over the full input voltage range. Refer to Table 1 for I/O connector
descriptions:
Table 1. Connector and Test Points
4.3
Header or Terminal Block
Description
J1: Micro-USB
Micro USB connector
J2: IN
Positive input power supply
J4: GND
Ground input power supply
J3: DC IN
Input power supply (terminal block)
J5: BAT
Positive battery pack terminal
J7:GND
Negative battery pack terminal
J6: BATand GND
Battery pack terminal (terminal block)
J11: LDO
Positive LDO terminal
J13: GND
Ground LDO terminal
J12: LDO and GND
LDO terminal block
J8: CSIN/SYS
Positive system terminal
J10: GND
Negative system terminal
J9: SYS/CSIN and GND
System terminal block
J14
Digital connector
J15: TS and GND
TS terminal block
Test Points
Table 2 provides the descriptions for the test points in the EVM.
Table 2. Test Points Description
Test Point
Description
TP1
SW
TP2
BAT
TP3
GND K
TP4
CSIN/SYS
TP5
IN
TP6
STAT
TP7
GND
TP8
PG/INT
TP9
SCL
TP10
SDA
TP11
ISET
TP12
ILIM
TP13
VDPM
TP14
BOOT
TP15
PMID
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Equipment and EVM Setup
4.4
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Pin Descriptions
Pin descriptions for the EVM are listed inTable 3.
Table 3. Pin Descriptions
PIN Number
A1,B1,C1
4.5
bq24250
bq24251
YFF
YFF
bq24257
YFF
BAT
BAT
BAT
A2,B2,C2
SYS
SYS
CSIN
A3,B3,C3
PGND
PGND
PGND
A4,B4,C4
SW
SW
SW
A5,B5,C5
IN
IN
IN
D1
ISET
ISET
ISET
D2
EN2
D–
D–
D3
EN1
D+
D+
D4
CE
CE
CE
D5
PMID
PMID
PMID
E1
INT
PG
PG
E2
SCL
SCL
SCL
E3
STAT
STAT
STAT
E4
VDPM
VDPM
VDPM
E5
BOOT
BOOT
BOOT
F1
TS
TS
TS
F2
SDA
SDA
SDA
F3
PGND
PGND
PGND
F4
LDO
LDO
LDO
F5
ILIM
ILIM
ILIM
Control and Key Parameters Setting
Table 4 lists and describes the jumpers on the EVM.
Table 4. Control and Key Parameters
Jumpers
6
Description
JP1
Shorting Jumper D+/EN1 and D–/EN2
JP2
2-3 (D+/EN1 = HI):D+/EN1 to logic high
2-1 (D+/EN1 = LO): D+/EN1 to logic low
JP3
2-3 (CE = HI): To place the battery charger in standby mode.
2-1 (CE = LO): Charge enable
JP4
2-3 (TS = Variable): Connect TS pin to variable resistor
2-1 (TS = Fixed): Connect TS pin to fixed resistor
JP5
2-3 (D–/EN2 = HI): D–/EN2 to logic high
2-1 (D–/EN2 = LO): D–/EN2 to logic low
JP6
2-3 (SCL = HI): SCL to logic high
2-1 (SCL = LO): SCL to logic low
JP7
2-3 (SDA = HI): SCL to logic high
2-1 (SDA = LO): SCL to logic low
JP8
Shorting jumper connects CE to J14
JP9
Shorting jumper connects D+/EN1 to J14
JP10
Shorting jumper connects D–/EN2 to J14
bq2425xEVM-150, Single-Cell Li-Ion Switch-Mode Charger
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Test Procedure
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5
Test Procedure
This procedure describes the test configuration of the EVM for bench evaluation.
5.1
Definition
The following naming conventions are followed:
VXXX: External voltage supply name (VADP, VBT, VSBT)
LOADW: External load name (LOADR, LOADI)
V(TPyy): Voltage at internal test point TPyy. For example, V(TP02) means the voltage at TP02
V(Jxx): Voltage at header 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 header XX
Jxx(BBB): Terminal or pin BBB of header xx
JPx ON: Internal jumper Jxx terminals are shorted
JPx OFF: Internal jumper Jxx terminals are open
JPx (-YY-) ON: Internal jumper Jxx adjacent terminals marked as YY are shorted
Assembly drawings show the location for jumpers, test points, and individual components.
5.2
Recommended Test Equipment
The following list includes the equipment and requirements necessary to perform all the tests in the test
procedure:
• Power supply #1 (PS #1) capable of supplying 12 V at 3 A
• Power supply #2 (PS #2) capable of supplying up to 5 V at 5 A to power the battery emulator
• A computer with at least one USB port and a USB cable
• Properly installed bq2425x evaluation software
• A HPA172 USB-to-I2C communication kit
• Three voltage meters (VM)
• Two equivalent current meters (A) able to measure 3-A current
5.3
Software
Download BQ2425xSW.zip from the charger's product folder, unzip the file, and double-click on the
SETUP.EXE file. Follow the installation steps. Because the bq2425x has the watchdog timer enabled, by
default, it is recommended to set the WD Timer Periodic Reset to 1 s, if it is desired to operate in host
mode. If standalone mode is desired, uncheck the Enable WD Timer while the device is only powered off
the battery. This mode of operation is important when evaluating the D+/D– detection function (only active
in standalone mode).
Also, it is generally helpful to activate the Write On Change functions, in the upper left of the GUI window,
to ON. The Write On Change function writes any changes to the GUI's check boxes, drop-down boxes,
and registers to the IC. Otherwise, click the WRITE button to write changes to the software. Click the
READ button periodically to find the IC's instantaneous status.
Note that all devices in the bq2425x family include a safety timer. If the time indicated in the Safety Timer
Time Limit elapses, charging discontinues. If this occurs, a power reset or battery removal is required.
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Test Procedure
5.4
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Recommended Test Equipment Set Up
1. For all power connections, use short, twisted-pair wires of appropriate gauge wire for the amount of the
current (handles 3 A).
2. Set power supply #1 (PS #1) for 6-V, 3-A current limit, then turn off supply.
Windows
PC
USB-to
GPIO (HPA172)
A1
PS1
VM1
VM3
VM2
A2
Battery
Emulator
Figure 2. Original Test Setup
8
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3. Adjust power supply #2 (PS #2) for approximately 3.6 V to the input side (PS #2±) of the battery
emulator shown in Figure 3, then turn off PS #2.
Battery Range:
0 to 4.3 V,
Sinks up to 4.5 V/(2.2 Ω/2) –4.0 A max
Connect to Charger BAT+ to BAT–
P/S Range:
0 to 4.5 V,
3A max Current due to 1N5821
D1 Connect to Power Source
BAT+
J1
BAT+
BAT–
BAT+
1N5821
R2
2.2, 25 W
R1
2.2, 25 W
1
2
2
1
PS #2 +
PS #2 –
J2
R3
0.1, 2 W–5 W
BAT–
Metal Strip
Sense Resistor
15FR100E
1
2
1
2
GND
TBH25P5R6
Figure 3. Battery Emulator
4. Connect the output side of the battery or battery emulator in series with the current meter to J5 and J7
or J6 (BAT, GND).
5. Connect a voltmeter (VM#2) across J8 and J10 (SYS test point, GND).
6. Connect VM#3 across J5 and J7 (BAT, GND)
7. Connect J14 to the HPA172 kit with the 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 4.
Figure 4. Connector Kit
8. By default, all jumpers are set to operate upon arrival.
9. After the proceeding steps have been performed, the test setup for PWR150 is configured as is shown
in Figure 2.
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Test Procedure
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Figure 5. Main Window of the bq2425xSW Evaluation Software
10. Turn on the computer. Open the bq2425x evaluation software. The main window of the software is
shown in Figure 5.
5.5
Recommended Test Procedure
5.5.1
1.
2.
3.
4.
5.
6.
7.
Charge Voltage and Charge Regulation in Default Mode
Ensure that the recommended test setup is followed.
Connect the output of PS #1 in series with current meter (A #1) to J2 and J4 (IN, GND).
Connect VM #1 across J4 and J2 (IN, GND).
Ensure the CE is low by shorting JP3 to GND.
Turn on PS #1 and PS #2.
Enable PS #2 or equivalent battery and adjust PS #2 so that the voltage measured by VM #3, across
BAT and GND, measures 3.6 V ±50 mV.
Adjust the power supply so VM #1 still reads 6 V ± 100 mV and VM#3 reads 3.2 V.
• Measure on A #2 → ICHRG = 1000 mA ±150 mA
• Measure on A #1 → IIN = 600 mA ±100 mA
5.5.2
Input and Charge Current Regulation in Host Mode
1. Ensure that the recommended test setup is followed.
2. Follow Section 6 for initial setup
3. Open the bq2425x software:
• Press the READ button to obtain the current settings.
• Change the Input Current Limit to 100 mA
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Test Procedure
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•
•
•
•
•
•
•
•
•
5.5.3
1.
2.
3.
4.
5.
6.
7.
Adjust VBAT to 3.6 V
– Measure on A #2 → ICHRG = 120 mA ±20 mA
– Measure on A #1 → IIN = 100 mA ±20 mA
Change the Charge Current to 1000 mA and the Input Current Limit to 900 mA and Battery
Regulation Voltage to 4.2 V
• Adjust VBAT to 3.6 V
– Measure on A #2 → ICHRG = 1000 mA ±100 mA
– Measure on A #1 → IIN = 650 mA ±50 mA
– Measure on V #3→ VBAT= 3.6 V ±10 mV
– Measure on V #2→ VSYS= 3.64 V ±30 mV
– Make sure D1 and D2 are ON (STAT and INT)
Change JP4 to jumper shorting pin TS and Var
Measure TS pin on JP15 as you change the value of the potentiometer R7
Change R7 until VTS = 3 V
– Measure on A #2 → ICHRG = 0 mA ±20 mA
Change R7 until VTS = 2.5 V
– Measure on A #2 → ICHRG = 1000 mA ±30 mA
Change R7 until VTS = 1 V
– Measure on A #2 → ICHRG = 0 mA ±20 mA
Change JP4 back to jumper shorting pin TS and Fix
D+/D– Detection in Standalone Mode (ONLY for bq24251 and bq24257)
Ensure that the recommended test setup is followed
Follow Section 6 for initial setup
Ensure the CE is low by shorting JP3 to GND and jumper shorting pin TS and Fix.
Enable PS #2 or equivalent battery and adjust PS #2 so that the voltage measured by VM #3, across
BAT and GND, measures 3.2 V ±50 mV
Remove the jumper at JP1, if present
Adjust VBAT to 3.2 V
Use a standard USB-to-micro-USB cable and plug in from a computer USB port to the micro-USB port
on the EVM (J1)
• Measure on A #2 → ICHRG = 110 mA ±10 mA
• Now we are in dead battery prevision
• Measure voltage on D+ (D+, JP1) to be 0.6 V
• Open the software
• Click Read in the software and Status for D+/D– Detection should read SDP Detected or EN2=1,
EN1=0
• Set in the Input Current Limit to 500 mA
• Check Clear VD+ Source box and uncheck it
• Measure voltage on D+ (D+, JP2) to 0 V
• Now you are exited the dead battery provision
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Test Results
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6
Test Results
6.1
Output Regulation Ripple
The test results shown in Figure 6 and Figure 7 are taken under 6-V input, 3.8-V battery and heavy and
light charging currents.
Figure 6. Output Regulation Ripple at ICHG = 1000 mA
Figure 7. Output Regulation Ripple at ICHG = 120 mA
6.2
Efficiency Data
Figure 8 illustrates the efficiency when the device is regulating the battery voltage (constant voltage
charge region). Here the charge current was set to 2 A and the BAT pin was loaded with an electronic
load. Different VIN levels were captured to compare the performance of the SMPS over increasing input
voltages.
100
VREG = 4.2 V
95
Efficiency (%)
90
85
80
75
VIN
V
V
IN ==55V
70
VIN
V
V
IN ==77V
VIN
10V
V
V
IN ==10
65
0
200
400
600
800
1000
1200
1400
1600
1800
2000
Output Current (mA)
C001
Figure 8. Efficiency Versus Output Current While in Battery Voltage Regulation (4.2V)”
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Layout and Bill of Materials
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6.3
Thermal Performance
This section shows a thermal image of the bq24257 running at 6-V input and 1-A system load, a 3.8-V
battery is used and charging at rate 1000 mA. There is no air flow and the ambient temperature is 25°C.
The peak temperature of the IC (60.4°C) is well below the maximum recommended operating condition
listed in the data sheet.
Figure 9. Thermal Image
7
Layout and Bill of Materials
7.1
Printed-Circuit Board Layout Guideline
1. Place the BOOT, PMID, IN, BAT, and LDO capacitors as close as possible to the IC for optimal
performance.
2. Connect the inductor as close as possible to the SW pin, and the CSIN cap as close as possible to the
inductor minimizing noise in the path.
3. Place a 1-μF PMID capacitor as close as possible to the PMID and PGND pins, making the highfrequency current loop area as small as possible.
4. The local bypass capacitor from SYS/CSIN to GND must be connected between the SYS/CSIN pin
and PGND of the IC. This minimizes the current path loop area from the SW pin through the LC filter
and back to the PGND pin.
5. Place all decoupling capacitors close to their respective IC pins and as close as possible to PGND (do
not place components such that routing interrupts power-stage currents). All small control signals must
be routed away from the high-current paths.
6. To reduce noise coupling, use a ground plane, if possible, to isolate the noisy traces from spreading its
noise all over the board. Put vias inside the PGND pads for the IC.
7. The high-current charge paths into IN, Micro-USB, BAT, SYS/CSIN, and from the SW pins must be
sized appropriately for the maximum charge current to avoid voltage drops in these traces.
8. For high-current applications, the balls for the power paths must be connected to as much copper in
the board as possible. This allows better thermal performance because the board conducts heat away
from the IC.
SLUUA08A – March 2013 – Revised April 2013
Submit Documentation Feedback
bq2425xEVM-150, Single-Cell Li-Ion Switch-Mode Charger
Copyright © 2013, Texas Instruments Incorporated
13
Layout and Bill of Materials
7.2
www.ti.com
Layout
Figure 10. bq2425xEVM-150 Top Assembly
14
bq2425xEVM-150, Single-Cell Li-Ion Switch-Mode Charger
Copyright © 2013, Texas Instruments Incorporated
SLUUA08A – March 2013 – Revised April 2013
Submit Documentation Feedback
Layout and Bill of Materials
www.ti.com
Figure 11. bq2425xEVM-150 Top Silkscreen
SLUUA08A – March 2013 – Revised April 2013
Submit Documentation Feedback
bq2425xEVM-150, Single-Cell Li-Ion Switch-Mode Charger
Copyright © 2013, Texas Instruments Incorporated
15
Layout and Bill of Materials
www.ti.com
Figure 12. bq2425xEVM-150 Top Layer
16
bq2425xEVM-150, Single-Cell Li-Ion Switch-Mode Charger
Copyright © 2013, Texas Instruments Incorporated
SLUUA08A – March 2013 – Revised April 2013
Submit Documentation Feedback
Layout and Bill of Materials
www.ti.com
Figure 13. bq2425xEVM-150 Second Layer (Internal) Routine
SLUUA08A – March 2013 – Revised April 2013
Submit Documentation Feedback
bq2425xEVM-150, Single-Cell Li-Ion Switch-Mode Charger
Copyright © 2013, Texas Instruments Incorporated
17
Layout and Bill of Materials
www.ti.com
Figure 14. bq2425xEVM-150 Third Layer (Internal) Routine
18
bq2425xEVM-150, Single-Cell Li-Ion Switch-Mode Charger
Copyright © 2013, Texas Instruments Incorporated
SLUUA08A – March 2013 – Revised April 2013
Submit Documentation Feedback
Layout and Bill of Materials
www.ti.com
Figure 15. bq2425xEVM-150 Bottom Layer
SLUUA08A – March 2013 – Revised April 2013
Submit Documentation Feedback
bq2425xEVM-150, Single-Cell Li-Ion Switch-Mode Charger
Copyright © 2013, Texas Instruments Incorporated
19
Layout and Bill of Materials
7.3
www.ti.com
Bill of Materials (BOM)
Table 5. bq2425xEVM-150 Bill of Materials
COUNT
RefDes
Value
Description
Size
Part Number
MFR
2
C1, C7
1.0uF
Capacitor, Ceramic, 25V, X5R, 20%
0805
STD
STD
1
C2
1.0uF
Capacitor, Ceramic, 16V, X5R, 10%
0402
STD
STD
1
1
C3
0.033uF
Capacitor, Ceramic, 25V, X5R, 10%
0402
STD
STD
1
1
1
C6
1.0uF
Capacitor, Ceramic, 6.3V, X5R, 10%
0402
STD
STD
1
1
0
C5
22uF
Capacitor, Ceramic, 10V, X5R, 20%
0805
STD
STD
0
0
1
C5
1.0uF
Capacitor, Ceramic, 10V, X5R, 20%
0805
STD
STD
1
1
0
C4
1.0uF
Capacitor, Ceramic, 10V, X5R, 20%
0805
STD
STD
0
0
1
C4
22uF
Capacitor, Ceramic, 10V, X5R, 20%
0805
STD
STD
2
2
2
D1-2
LTST-C190GKT
Diode, LED, Green, 2.1-V, 20-mA, 6-mcd
0603
LTST-C190GKT
Lite On
1
1
1
J1
1050170001
Connector, SMT, Micro USB-B
5x7.5 mm
1050170001
Molex
1
1
1
J14
N2510-6002RB
Connector, Male Straight 2x5 pin, 100mil spacing, 4
Wall
0.338 x 0.788
inch
N2510-6002RB
3M
9
9
9
J2 J4-5 J7-8
J10-11 J13 J15
PEC02SAAN
Header, Male 2-pin, 100mil spacing,
0.100 inch x 2
PEC02SAAN
Sullins
4
4
4
J3 J6 J9 J12
ED555/2DS
Terminal Block, 2-pin, 6-A, 3.5mm
0.27 x 0.25
inch
ED555/2DS
OST
4
4
4
JP1 JP8-10
PEC02SAAN
Header, Male 2-pin, 100mil spacing,
0.100 inch x 2
PEC02SAAN
Sullins
4
4
4
JP3, 4, 6, 7
PEC03SAAN
Header, Male 3-pin, 100mil spacing,
0.100 inch x 3
PEC03SAAN
Sullins
1
1
1
L1
1.0uH
Inductor, SMT ±30%
2x2.5 mm
1239AS-H-1R0M
(DFE252012C) see Note
8
Toko
1
1
1
R10
274K
Resistor, Chip, 1/16W, 1%
0603
STD
STD
1
1
1
R11
100K
Resistor, Chip, 1/16W, 1%
0603
STD
STD
2
2
2
R1-2
200
Resistor, Chip, 1/16W, 1%
0603
STD
STD
2
2
2
R3-4
1.50K
Resistor, Chip, 1/16W, 1%
0603
STD
STD
2
2
2
R5-6
20.0K
Resistor, Chip, 1/16W, 1%
0603
STD
STD
1
1
1
R7
100K
Potentiometer, 3/8 Cermet, Twelve-Turn
0.25x0.17 inch
3266W-1-104LF
Bourns
1
1
1
R8
267
Resistor, Chip, 1/16W, 1%
0603
STD
STD
1
1
1
R9
249
Resistor, Chip, 1/16W, 1%
0603
STD
STD
15
15
15
TP1-15
5002
Test Point, White, Thru Hole Color Keyed
0.100 x 0.100
inch
5002
Keystone
1
0
0
U1
BQ24250YFF
IC, 2.0A Single Input I2C/Standalone Switch-Mode LiIon Battery Charger
BGA
BQ24250YFF
TI
0
1
0
U1
BQ24251YFF
IC, 2.0A Single Input I2C/Standalone Switch-Mode LiIon Battery Charger
BGA
BQ24251YFF
TI
0
0
1
U1
BQ24257YFF
IC, 2.0A Single Input I2C/Standalone Switch-Mode LiIon Battery Charger
BGA
BQ24257YFF
TI
0
0
0
JP2, 5
Open
Header, Male 3-pin, 100mil spacing,
0.100 inch x 3
PEC03SAAN
Sullins
5
3
3
--
--
Shunt, 100-mil, Black
0.100
929950-00
3M
1
1
1
--
--
PCB
PWR150
Any
001
002
003
2
2
1
1
1
Notes:
1. These assemblies are ESD sensitive, observe ESD precautions.
2. These assemblies must be clean and free from flux and all contaminants. Use of no-clean flux is not acceptable.
3. These assemblies must comply with workmanship standards IPC-A-610 Class 2.
4. The ICs of the first build of these EVMs have a different marker.
5. Ref designators marked with an asterisk ('**') cannot be substituted. All other components can be substituted with equivalent MFG's components.
6. Install shunts on:
JP3 between CE and LOW (all)
JP4 between TS and FIX (all)
JP8 Install (all)
JP5 between D–/EN2 and Low (bq24250 only)
JP2 between D+/EN1 and Low (bq24250 only)
7. The first cycle of this EVM, the Top Marking of the IC is different from the latter cycles.
8. TFM252010A-1ROM from TDK inductor can be used.
20
bq2425xEVM-150, Single-Cell Li-Ion Switch-Mode Charger
Copyright © 2013, Texas Instruments Incorporated
SLUUA08A – March 2013 – Revised April 2013
Submit Documentation Feedback
EVALUATION BOARD/KIT/MODULE (EVM) ADDITIONAL TERMS
Texas Instruments (TI) provides the enclosed Evaluation Board/Kit/Module (EVM) under the following conditions:
The user assumes all responsibility and liability for proper and safe handling of the goods. Further, the user indemnifies TI from all claims
arising from the handling or use of the goods.
Should this evaluation board/kit not meet the specifications indicated in the User’s Guide, the board/kit may be returned within 30 days from
the date of delivery for a full refund. THE FOREGOING LIMITED WARRANTY IS THE EXCLUSIVE WARRANTY MADE BY SELLER TO
BUYER AND IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESSED, IMPLIED, OR STATUTORY, INCLUDING ANY WARRANTY OF
MERCHANTABILITY OR FITNESS FOR ANY PARTICULAR PURPOSE. EXCEPT TO THE EXTENT OF THE INDEMNITY SET FORTH
ABOVE, NEITHER PARTY SHALL BE LIABLE TO THE OTHER FOR ANY INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL
DAMAGES.
Please read the User's Guide and, specifically, the Warnings and Restrictions notice in the User's Guide prior to handling the product. This
notice contains important safety information about temperatures and voltages. For additional information on TI's environmental and/or safety
programs, please visit www.ti.com/esh or contact TI.
No license is granted under any patent right or other intellectual property right of TI covering or relating to any machine, process, or
combination in which such TI products or services might be or are used. TI currently deals with a variety of customers for products, and
therefore our arrangement with the user is not exclusive. TI assumes no liability for applications assistance, customer product design,
software performance, or infringement of patents or services described herein.
REGULATORY COMPLIANCE INFORMATION
As noted in the EVM User’s Guide and/or EVM itself, this EVM and/or accompanying hardware may or may not be subject to the Federal
Communications Commission (FCC) and Industry Canada (IC) rules.
For EVMs not subject to the above rules, this evaluation board/kit/module 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. It generates, uses, and can radiate radio frequency energy and has not been tested for compliance with the limits of computing
devices pursuant to part 15 of FCC or ICES-003 rules, which are designed to provide reasonable protection against radio frequency
interference. Operation of the equipment may cause interference with radio communications, in which case the user at his own expense will
be required to take whatever measures may be required to correct this interference.
General Statement for EVMs including a radio
User Power/Frequency Use Obligations: This radio is intended for development/professional use only in legally allocated frequency and
power limits. Any use of radio frequencies and/or power availability of this EVM and its development application(s) must comply with local
laws governing radio spectrum allocation and power limits for this evaluation module. It is the user’s sole responsibility to only operate this
radio in legally acceptable frequency space and within legally mandated power limitations. Any exceptions to this are strictly prohibited and
unauthorized by Texas Instruments unless user has obtained appropriate experimental/development licenses from local regulatory
authorities, which is responsibility of user including its acceptable authorization.
For EVMs annotated as FCC – FEDERAL COMMUNICATIONS COMMISSION Part 15 Compliant
Caution
This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause
harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.
Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the
equipment.
FCC Interference Statement for Class A EVM devices
This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to part 15 of the FCC Rules.
These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial
environment. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the
instruction manual, may cause harmful interference to radio communications. Operation of this equipment in a residential area is likely to
cause harmful interference in which case the user will be required to correct the interference at his own expense.
FCC Interference Statement for Class B EVM devices
This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules.
These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment
generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause
harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If
this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and
on, the user is encouraged to try to correct the interference by one or more of the following measures:
• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and receiver.
• Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
• Consult the dealer or an experienced radio/TV technician for help.
For EVMs annotated as IC – INDUSTRY CANADA Compliant
This Class A or B digital apparatus complies with Canadian ICES-003.
Changes or modifications not expressly approved by the party responsible for compliance could void the user’s authority to operate the
equipment.
Concerning EVMs including radio transmitters
This device complies with Industry Canada licence-exempt RSS standard(s). Operation is subject to the following two conditions: (1) this
device may not cause interference, and (2) this device must accept any interference, including interference that may cause undesired
operation of the device.
Concerning EVMs including detachable antennas
Under Industry Canada regulations, this radio transmitter may only operate using an antenna of a type and maximum (or lesser) gain
approved for the transmitter by Industry Canada. To reduce potential radio interference to other users, the antenna type and its gain should
be so chosen that the equivalent isotropically radiated power (e.i.r.p.) is not more than that necessary for successful communication.
This radio transmitter has been approved by Industry Canada to operate with the antenna types listed in the user guide with the maximum
permissible gain and required antenna impedance for each antenna type indicated. Antenna types not included in this list, having a gain
greater than the maximum gain indicated for that type, are strictly prohibited for use with this device.
Cet appareil numérique de la classe A ou B est conforme à la norme NMB-003 du Canada.
Les changements ou les modifications pas expressément approuvés par la partie responsable de la conformité ont pu vider l’autorité de
l'utilisateur pour actionner l'équipement.
Concernant les EVMs avec appareils radio
Le présent appareil est conforme aux CNR d'Industrie Canada applicables aux appareils radio exempts de licence. L'exploitation est
autorisée aux deux conditions suivantes : (1) l'appareil ne doit pas produire de brouillage, et (2) l'utilisateur de l'appareil doit accepter tout
brouillage radioélectrique subi, même si le brouillage est susceptible d'en compromettre le fonctionnement.
Concernant les EVMs avec antennes détachables
Conformément à la réglementation d'Industrie Canada, le présent émetteur radio peut fonctionner avec une antenne d'un type et d'un gain
maximal (ou inférieur) approuvé pour l'émetteur par Industrie Canada. Dans le but de réduire les risques de brouillage radioélectrique à
l'intention des autres utilisateurs, il faut choisir le type d'antenne et son gain de sorte que la puissance isotrope rayonnée équivalente
(p.i.r.e.) ne dépasse pas l'intensité nécessaire à l'établissement d'une communication satisfaisante.
Le présent émetteur radio a été approuvé par Industrie Canada pour fonctionner avec les types d'antenne énumérés dans le manuel
d’usage et ayant un gain admissible maximal et l'impédance requise pour chaque type d'antenne. Les types d'antenne non inclus dans
cette liste, ou dont le gain est supérieur au gain maximal indiqué, sont strictement interdits pour l'exploitation de l'émetteur.
SPACER
SPACER
SPACER
SPACER
SPACER
SPACER
SPACER
SPACER
【Important Notice for Users of this Product in Japan】
】
This development kit is NOT certified as Confirming to Technical Regulations of Radio Law of Japan
If you use this product in Japan, you are required by Radio Law of Japan to follow the instructions below with respect to this product:
1.
2.
3.
Use this product in a shielded room or any other test facility as defined in the notification #173 issued by Ministry of Internal Affairs and
Communications on March 28, 2006, based on Sub-section 1.1 of Article 6 of the Ministry’s Rule for Enforcement of Radio Law of
Japan,
Use this product only after you obtained the license of Test Radio Station as provided in Radio Law of Japan with respect to this
product, or
Use of this product only after you obtained the Technical Regulations Conformity Certification as provided in Radio Law of Japan with
respect to this product. Also, please do not transfer this product, unless you give the same notice above to the transferee. Please note
that if you could not follow the instructions above, you will be subject to penalties of Radio Law of Japan.
Texas Instruments Japan Limited
(address) 24-1, Nishi-Shinjuku 6 chome, Shinjuku-ku, Tokyo, Japan
http://www.tij.co.jp
【ご使用にあたっての注】
本開発キットは技術基準適合証明を受けておりません。
本製品のご使用に際しては、電波法遵守のため、以下のいずれかの措置を取っていただく必要がありますのでご注意ください。
1.
2.
3.
電波法施行規則第6条第1項第1号に基づく平成18年3月28日総務省告示第173号で定められた電波暗室等の試験設備でご使用いただく。
実験局の免許を取得後ご使用いただく。
技術基準適合証明を取得後ご使用いただく。
なお、本製品は、上記の「ご使用にあたっての注意」を譲渡先、移転先に通知しない限り、譲渡、移転できないものとします。
上記を遵守頂けない場合は、電波法の罰則が適用される可能性があることをご留意ください。
日本テキサス・インスツルメンツ株式会社
東京都新宿区西新宿６丁目２４番１号
西新宿三井ビル
http://www.tij.co.jp
SPACER
SPACER
SPACER
SPACER
SPACER
SPACER
SPACER
SPACER
SPACER
SPACER
SPACER
SPACER
SPACER
SPACER
SPACER
SPACER
EVALUATION BOARD/KIT/MODULE (EVM)
WARNINGS, RESTRICTIONS AND DISCLAIMERS
For Feasibility Evaluation Only, in Laboratory/Development Environments. Unless otherwise indicated, this EVM is not a finished
electrical equipment and not intended for consumer use. It is intended solely for use for preliminary feasibility evaluation in
laboratory/development environments by technically qualified electronics experts who are familiar with the dangers and application risks
associated with handling electrical mechanical components, systems and subsystems. It should not be used as all or part of a finished end
product.
Your Sole Responsibility and Risk. You acknowledge, represent and agree that:
1.
2.
3.
4.
You have unique knowledge concerning Federal, State and local regulatory requirements (including but not limited to Food and Drug
Administration regulations, if applicable) which relate to your products and which relate to your use (and/or that of your employees,
affiliates, contractors or designees) of the EVM for evaluation, testing and other purposes.
You have full and exclusive responsibility to assure the safety and compliance of your products with all such laws and other applicable
regulatory requirements, and also to assure the safety of any activities to be conducted by you and/or your employees, affiliates,
contractors or designees, using the EVM. Further, you are responsible to assure that any interfaces (electronic and/or mechanical)
between the EVM and any human body are designed with suitable isolation and means to safely limit accessible leakage currents to
minimize the risk of electrical shock hazard.
You will employ reasonable safeguards to ensure that your use of the EVM will not result in any property damage, injury or death, even
if the EVM should fail to perform as described or expected.
You will take care of proper disposal and recycling of the EVM’s electronic components and packing materials.
Certain Instructions. It is important to operate this EVM within TI’s recommended specifications and environmental considerations per the
user guidelines. Exceeding the specified EVM ratings (including but not limited to input and output voltage, current, power, and
environmental ranges) may cause property damage, personal injury or death. If there are questions concerning these ratings please contact
a TI field representative prior to connecting interface electronics including input power and intended loads. Any loads applied outside of the
specified output range may result in unintended and/or inaccurate operation and/or possible permanent damage to the EVM and/or
interface electronics. Please consult the EVM User's Guide prior to connecting any load to the EVM output. If there is uncertainty as to the
load specification, please contact a TI field representative. During normal operation, some circuit components may have case temperatures
greater than 60°C as long as the input and output are maintained at a normal ambient operating temperature. These components include
but are not limited to linear regulators, switching transistors, pass transistors, and current sense resistors which can be identified using the
EVM schematic located in the EVM User's Guide. When placing measurement probes near these devices during normal operation, please
be aware that these devices may be very warm to the touch. As with all electronic evaluation tools, only qualified personnel knowledgeable
in electronic measurement and diagnostics normally found in development environments should use these EVMs.
Agreement to Defend, Indemnify and Hold Harmless. You agree to defend, indemnify and hold TI, its licensors and their representatives
harmless from and against any and all claims, damages, losses, expenses, costs and liabilities (collectively, "Claims") arising out of or in
connection with any use of the EVM that is not in accordance with the terms of the agreement. This obligation shall apply whether Claims
arise under law of tort or contract or any other legal theory, and even if the EVM fails to perform as described or expected.
Safety-Critical or Life-Critical Applications. If you intend to evaluate the components for possible use in safety critical applications (such
as life support) where a failure of the TI product would reasonably be expected to cause severe personal injury or death, such as devices
which are classified as FDA Class III or similar classification, then you must specifically notify TI of such intent and enter into a separate
Assurance and Indemnity Agreement.
Mailing Address: Texas Instruments, Post Office Box 655303, Dallas, Texas 75265
Copyright © 2012, Texas Instruments Incorporated
IMPORTANT NOTICE
Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, enhancements, improvements and other
changes to its semiconductor products and services per JESD46, latest issue, and to discontinue any product or service per JESD48, latest
issue. Buyers should obtain the latest relevant information before placing orders and should verify that such information is current and
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TI warrants performance of its components to the specifications applicable at the time of sale, in accordance with the warranty in TI’s terms
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TI assumes no liability for applications assistance or the design of Buyers’ products. Buyers are responsible for their products and
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