Texas Instruments BQ25176MEVM User manual

EVM User's Guide:
BQ25176MEVM Evaluation Module
ABSTRACT
This user’s guide describes the characteristics, operation, and use of the BQ25176MEVM evaluation module
(EVM). This EVM is designed to help the user evaluate and test the various operating modes of the BQ25176M.
This user’s guide includes setup instructions for the hardware and software, a schematic diagram, a bill of
materials (BOM), and PCB layout drawings for the evaluation module.
Throughout this user's guide, the abbreviations EVM, BQ25176MEVM, BMS069, and the term evaluation
module are synonymous with the BMS069 evaluation module, unless otherwise noted.
Table of Contents
1 Introduction.............................................................................................................................................................................2
1.1 Printed Circuit Board Assembly......................................................................................................................................... 2
1.2 I/O Descriptions..................................................................................................................................................................2
2 Test Summary......................................................................................................................................................................... 3
2.1 Equipment.......................................................................................................................................................................... 3
2.2 Cautions............................................................................................................................................................................. 3
2.3 Test Instructions................................................................................................................................................................. 3
3 Board Layout, Schematic, and Bill of Materials...................................................................................................................4
3.1 Board Layout......................................................................................................................................................................4
3.2 Schematic.......................................................................................................................................................................... 7
3.3 Bill of Materials...................................................................................................................................................................8
4 Revision History....................................................................................................................................................................11
Trademarks
All trademarks are the property of their respective owners.
WARNING
Hot surface! Contact may cause burns. Do not touch!
Some components may reach high temperatures >55°C when the board is powered on. The user must
not touch the board at any point during operation or immediately after operating, as high temperatures
may be present.
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1 Introduction
The Texas Instruments BQ25176EVM is a Li-Ion, Li-Poly and LiFePO4 chemistry battery charger IC for single
cell. Charging voltage can be adjusted using external resistors on VSET. Charging current can be set from 60mA
to 600mA with external resistor on ISET.
1.1 Printed Circuit Board Assembly
The BQ25176EVM PCB contains the BQ25176 IC, LDO TPS7B8133 and support circuits. This board contains
several jumpers and connectors. S1 (VSET) allows selected output voltages to be programmed. R9 resistor
allows a wide range of adjustment of VSET. R22 can be used to change ISET value, fast charge current. R19
can be used to adjust BIAS, battery temp sensor to simulate hot and cold fault.
1.2 I/O Descriptions
Table 1-1 lists the input and output connections available on this EVM and their respective descriptions.
Table 1-1. EVM I/O Connections
I/O Connector Description
J1 – VIN / GND
Input voltage from external power supply, recommended 5
V. Max operating input voltage is 6.6 V, OVP trip point. Max
input voltage is 30 V while in OVP.
J2 – OUT (BAT+) / GND (BAT-) / GND / BIAS Battery connection, connect 10-kΩ resistor to BIAS or use 10
kΩ on PCB (JP6).
JP1 – VSET ADJ. Disable R9, default is installed.
JP2 – REG / IN / OUT Source voltage for housekeeping regulator, U2. Default Input
voltage IN.
JP3 – PG (Power Good) LED Default setting is ON.
JP4 – ISET Sets Fast Charge Current. Fixed = 400 mA ADJ = R22 range
60 mA to 600 mA
JP5 - STAT LED Default setting is ON.
JP6 – BIAS Fixed=10 k.
JP7 Not used, do not install
JP8 Not used, do not install
JP9 Not used, do not install
Table 1-2 lists the S1 switch positions for VSET and their respective descriptions. Use only one postion ON, do
not combine.
Table 1-2. VSET S1 Switch Positions
Position / RX / Value Li+Voltage / Configuration
#1 / R1 / 100 kΩ 3.5V / 1-Cell LiFePO4
#2 / R2 / 82.5 kΩ 3.6V / 1-Cell LiFePO4
#3 / R3 / 61.9 kΩ 3.7V / 1-Cell LiFePO4
#4 / R4 / 35.7 kΩ 4.15V / 1-Cell Li-Ion
#5 / R5 / 27.4 kΩ 4.2V / 1-Cell Li-Ion
#6 / R6 / 24.3 kΩ 4.35V / 1-Cell Li-Ion
#7 / R7 / 18.2 kΩ 4.4V / 1-Cell Li-Ion
#8 / R8 / 0 Ω Short Circuit – No Charge
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2 Test Summary
This section describes the jumpers and connectors on the EVM as well as how to properly connect, setup, and
use the BQ25176EVM. Note that the default jumper setting of headers and switches are marked with two dots to
indicate the shorting jumper position. This will put the unit into a single cell Li-Ion configuration, 4.2 V at 400 mA.
2.1 Equipment
This section includes a list of supplies required to perform tests on this EVM.
1. Battery simulator such as Keithley 2400 or equilvalent. Or a single-cell battery.
2. Power supply, 5-V 1-A input. Note that unit can operate up to 6.6-V input.
3. Voltage meter and current meter.
2.2 Cautions
To prevent possible damage to battery under test verify that charging conditions of the cell are not exceeded.
Check max charge voltage and current.
Power dissipation of the device can be exceeded with too high an input to output voltage drop and current.
Thermal regulation begins reducing current at 125 °C, at 150 °C device will shut off.
Device can get hot during high input-to-output voltage drop and high current conditions. Use caution when
handling the board.
2.3 Test Instructions
In order for this EVM to operate properly, the following components must be connected and properly configured.
1. Set input power supply to 5 V and Battery Simulator to 3.6 V with compliance to support 800 mA. Turn off
Supply and Battery Simulator.
2. Connect input voltages to J1 and Battery Simulator to J2 on the EVM.
3. Configure all EVM jumpers to factory setting, refer to table below.
4. Turn on all supplies and loads
a. 5-V Input supply current limit should be greater than 500 mA
b. Out voltage should be 3.6 V and charge current 400 mA
c. LED D1 and D2 will be ON
5. Simulate battery completing charge by increasing Battery Simulator voltage to 4.2 V
a. Current will decrease to 0 mA
b. LED D2 will switch to OFF.
Table 2-1. Jumper Factory Setting
I/O Connector Factory Setting
JP1 Installed
JP2 IN
JP3 Installed
JP4 Fixed
JP5 Installed
JP6 Fixed
JP7 N/A
JP8 N/A
JP9 N/A
S1 Position 5 (4.2-V Li-Ion)
S2 N/A
Note: IN, ON, Fixed are positions of a 3 pin header. If it is a 2 pin header then it is installed or not installed.
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3 Board Layout, Schematic, and Bill of Materials
3.1 Board Layout
The board layout is shown in Figure 3-1 to Figure 3-7.
Figure 3-1. Top Overlay
Figure 3-2. Top Solder
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Figure 3-3. Top Layer
Figure 3-4. Bottom Layer
Figure 3-5. Bottom Solder
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Figure 3-6. Bottom Overlay
Figure 3-7. Drill Drawing
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3.2 Schematic
The BQ25176EVM schematic is shown in Figure 3-8.
3
R4
GND
GND
GND GND
GND GND
GND
GND
GND
GND
GND
GND GND
GND
GND GND
GND
GND
GND
GND
GND
GND
GND
R1
R2
R3
R5
R7
R8
R6
R22
5k Ohm
R18
50k Ohm
R17
604k
R16
500k
R15
604k
R25
10.0k
R21
499 R26
2.00k
R10
750
R20
10.0k
R19
50k Ohm
C3
50V
1μF
C8
47nF
50V
VSET-ADJ
R9
50k Ohm
C4
1μF
16V
C8
50V
1μF
C1
50V
1μF
R14
R13
R12
R11
R23
1.00k
R24
1.00k
C2
1μF
16V
C7
1μF
16V
DNP DNP DNP
DNP DNP
DNP
C5
100pF
Battery
BIAS
VSET-FB
Pull-Up
Battery
/PG-TRM
/PG-TRM
/PG-TRM
Battery
Pull-Up
Pull-Up
Pull-Up
VSET-FB
BIAS
BIAS
TP12 TP13
TP14
TP1
TP13JP2
SH-JP2
J1
TP5
TP2
TP3
BQ25176MDSG
OUT(BAT)
REG
IN(+)
3
1
21
2
5
IN
DNC
EN
OUT
GND
GND
PAD
U2
6
3
4
7
IN(+)
GND
1
2
3
2
1
JP4
SH-JP4
Fixed
ISET
ADJ
ISET-ADJ DNP
DNP
DNP
DNP
DNP
DNP
DNP
DNP
DNP
DNP DNP
DNP
TP7
U1
IN
BIAS
ISET
VSET
OUT
PG
STAT
GND
Thermal_Pad
1
2
7 4
9
5
6
8
1
2
JP1
SH-JP1
1
2
3
4
5
6
7
89
10
11
12
13
14
15
16
76SB08ST
VSET
S1
1 2 3
JP6
SH-JP6
Fixed
BIAS
ADJ
DNP
DNP
DNP
JP5
SH-JP5
1
2
S2
1
2
3
45
6
7
8
78B04ST
TMR
SH-JP9 SH-JP8
JP8
OFF
/CE
ON
3
2
1
1
2
3
4
J2
TP8
TP9
TP6 JP3
1
2
2
2
1
1
D1
D2
SH-JP3
BIAS
GND
GND(Bat-)
OUT(Bat+)
TPS7B8133QDRVQ1
JP7
SH-JP7
1
2
TP10
JP9
/GP
FB-GND
GND 1
2
3
100k
82.5k
61.9k
35.7k
0
18.2k
24.3k
27.4k
33.0k
18.2k
7.50k
0
Figure 3-8. BQ25176EVM Schematic
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3.3 Bill of Materials
The bill of materials is shown in the following table.
Table 3-1. Bill of Materials
Fitted Description Designator PartNumber Quantity Manufacturer PackageReference Value Alternate
Manufacturer
Alternate
PartNumber
Fitted Printed Circuit Board !PCB? BMS069 1 Any
Fitted
CAP, CERM, 1 µF, 50 V,+/-
20%, X5R, AEC-Q200 Grade
3, 0603
C1, C3 GRT188R61H105ME13D 2 MuRata 0603 1uF
Fitted
CAP, CERM, 1 uF, 16 V, +/-
10%, X7R, AEC-Q200 Grade
1, 0603
C2, C4 GCM188R71C105KA64D 2 MuRata 0603 1uF
Fitted LED, Green, SMD D1, D2 LTST-C193TGKT-5A 2 Lite-On Body1.6x0.8mm Green
Fitted Bumpon, Hemisphere, 0.44 X
0.20, Clear H1, H2, H3, H4 SJ-5303 (CLEAR) 4 3M Transparent Bumpon
Fitted Terminal Block, 3.5mm Pitch,
2x1, TH J1 ED555/2DS 1 On-Shore Technology 7.0x8.2x6.5mm
Fitted Terminal Block, 3.5mm Pitch,
4x1, TH J2 ED555/4DS 1 On-Shore Technology 14x8.2x6.5mm
Fitted Header, 100mil, 2x1, Tin, TH JP1, JP3, JP5 PEC02SAAN 3
Sullins
Connector
Solutions
Header, 2 PIN,
100mil, Tin
Fitted Header, 100mil, 3x1, Tin, TH JP2, JP4, JP6 PEC03SAAN 3
Sullins
Connector
Solutions
Header, 3 PIN,
100mil, Tin
Fitted
Thermal Transfer Printable
Labels, 0.650" W x 0.200" H
- 10,000 per roll
LBL1 THT-14-423-10 1 Brady PCB Label 0.650 x
0.200 inch
Fitted RES, 100 k, 1%, 0.1 W, 0603 R1 RC0603FR-07100KL 1 Yageo 0603 100k
Fitted 82.5k R2 RC0603FR-0782K5L 1 Yageo 0603 18.2
kOhms
Fitted RES 61.9K OHM 1% 1/10W
0603 R3 RC0603FR-0761K9L 1 Yageo 0603 61.9k
Fitted
35.7kΩ ±1% 0.063W, 1/16W
Chip Resistor 0603 (1608
Metric) Moisture Resistant
Thin Film
R4 RN731JTTD3572F10 1 KOA Speer
Electronics Inc 0603 35.7k
Fitted
27.4kΩ ±1% 0.063W, 1/16W
Chip Resistor 0603 (1608
Metric) Moisture Resistant
Thin Film
R5 RN731JTTD2742F50 1 KOA Speer
Electronics Inc 0603 27.4k
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Table 3-1. Bill of Materials (continued)
Fitted Description Designator PartNumber Quantity Manufacturer PackageReference Value Alternate
Manufacturer
Alternate
PartNumber
Fitted RES 24.3K OHM 1% 1/10W
0603 R6 RC0603FR-0724K3L 1 Yageo 0603 24.3k
Fitted
18.2kΩ ±1% 0.063W, 1/16W
Chip Resistor 0603 (1608
Metric) Moisture Resistant
Thin Film
R7 RN731JTTD1822F10 1 KOA Speer
Electronics Inc 0603 18.2k
Fitted RES, 0, 5%, 0.1 W, 0603 R8 RC0603JR-070RL 1 Yageo 0603 0
Fitted
Trimmer Potentiometer, Lead
Sealed Type Multiturn PV37
Series, TH
R9 PV37W503C01B00 1 Bourns 6.71x4.5mm 50k Ohm
Fitted RES, 750, 1%, 0.1 W, 0603 R10 RC0603FR-07750RL 1 Yageo 0603 750
Fitted RES, 10.0 k, 1%, 0.1 W,
AEC-Q200 Grade 0, 0603 R20 CRCW060310K0FKEA 1 Vishay-Dale 0603 10.0k
Fitted RES, 499, 1%, 0.1 W, 0603 R21 CRCW0603499RFKEAC 1 Vishay-Dale 0603 499
Fitted Trimmer Potentiometer, Lead
Sealed Type Multiturn PV37
Series, TH
R22 PV37W502C01B00 1 Bourns 6.71x4.5mm 5k Ohm
Fitted RES, 1.00 k, 1%, 0.1 W, 0603 R23, R24 RC0603FR-071KL 2 Yageo 0603 1.00k
Fitted Switch, SPST 8Pos, Rocker,
TH S1 76SB08ST 1 Grayhill 9.65X8X22.4mm
Fitted Shunt, 100mil, Gold plated,
Black
SH-JP1, SH-JP2,
SH-JP3, SH-JP4,
SH-JP5, SH-JP6,
SH-JP7
SNT-100-BK-G 7 Samtec Shunt 1x2 3M 969102-0000-DA
Fitted Test Lead clips and hooks,
SMT
TP1, TP2, TP3,
TP4, TP5, TP6,
TP7, TP8, TP9,
TP10, TP12,
TP13, TP14
S1751-46 13 Harwin Test Point, Body
3.25x1.65mm
Fitted
0.8A, 1-Cell, linear battery
charger with continual
charge mode for harvesting
applications
U1 BQ25176MDSG 1 Texas
Instruments WSON8
Fitted
Automotive 150-mA high-
voltage ultra-low-IQ low-
dropout (LDO) linear
regulator, DRV0006A
(WSON-6)
U2 TPS7B8133QDRVRQ1 1 Texas
Instruments DRV0006A Texas Instruments
Not Fitted CAP, CERM, 100 pF, 50 V, +/-
1%, C0G/NP0, 0402 C5 04025A101FAT2A 0 AVX 0402 100pF
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Table 3-1. Bill of Materials (continued)
Fitted Description Designator PartNumber Quantity Manufacturer PackageReference Value Alternate
Manufacturer
Alternate
PartNumber
Not Fitted
CAP, CERM, 1 µF, 50 V,+/-
20%, X5R, AEC-Q200 Grade
3, 0603
C6 GRT188R61H105ME13D 0 MuRata 0603 1uF
Not Fitted
CAP, CERM, 1 uF, 16 V, +/-
10%, X7R, AEC-Q200 Grade
1, 0603
C7 GCM188R71C105KA64D 0 MuRata 0603 1uF
Not Fitted CAP, CERM, 0.047 uF, 50 V,
+/- 10%, X7R, 0603 C8 C1608X7R1H473K080AA 0 MuRata 0603 0.047uF
Not Fitted Fiducial mark. There is
nothing to buy or mount. FID1, FID2, FID3 N/A 0 N/A N/A
Not Fitted Header, 100mil, 2x1, Tin, TH JP7 PEC02SAAN 0
Sullins
Connector
Solutions
Header, 2 PIN,
100mil, Tin
Not Fitted Header, 100mil, 3x1, Tin, TH JP8, JP9 PEC03SAAN 0
Sullins
Connector
Solutions
Header, 3 PIN,
100mil, Tin
Not Fitted RES, 33.0 k, 1%, 0.1 W, 0603 R11 RC0603FR-0733KL 0 Yageo 0603 33.0k
Not Fitted RES, 18.2 k, 1%, 0.1 W, 0603 R12 RC0603FR-0718K2L 0 Yageo 0603 18.2k
Not Fitted RES, 7.50 k, 1%, 0.1 W, 0603 R13 RC0603FR-077K5L 0 Yageo 0603 7.50k
Not Fitted RES, 0, 5%, 0.1 W, 0603 R14 RC0603JR-070RL 0 Yageo 0603 0
Not Fitted RES, 604 k, 0.1%, 0.125 W,
0805 R15, R17 RT0805BRD07604KL 0 Yageo America 0805 604k
Not Fitted
500 kOhms 0.25W, 1/4W PC
Pins Through Hole Trimmer
Potentiometer Cermet 12
Turn Top Adjustment
R16 PV37W504C01B00 0 Bourns PTH_3
Not Fitted
Trimmer Potentiometer, Lead
Sealed Type Multiturn PV37
Series, TH
R18 PV37W503C01B00 0 Bourns 6.71x4.5mm 50k Ohm
Not Fitted RES, 10.0 k, 1%, 0.1 W,
AEC-Q200 Grade 0, 0603 R25 CRCW060310K0FKEA 0 Vishay-Dale 0603 10.0k
Not Fitted RES, 2.00 k, 1%, 0.1 W,
AEC-Q200 Grade 0, 0603 R26 CRCW06032K00FKEA 0 Vishay-Dale 0603 2.00k
Not Fitted DIP Switch, SPST 4Pos,
Slide, TH S2 78B04ST 0 Grayhill DIP Switch, 4 Pos
Not Fitted Shunt, 100mil, Gold plated,
Black SH-JP8, SH-JP9 SNT-100-BK-G 0 Samtec Shunt 1x2 3M 969102-0000-DA
Unless otherwise noted in the Alternate PartNumber and/or Alternate Manufacturer columns, all parts may be substituted with equivalents.
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