Texas Instruments BQ25720 User Manual Download Page 20

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Regulatory Notices:

3.1

United States

3.1.1

Notice applicable to EVMs not FCC-Approved:

FCC NOTICE:

This kit is designed to allow product developers to evaluate electronic components, circuitry, or software

associated with the kit to determine whether to incorporate such items in a finished product and software developers to write
software applications for use with the end product. This kit is not a finished product and when assembled may not be resold or
otherwise marketed unless all required FCC equipment authorizations are first obtained. Operation is subject to the condition
that this product not cause harmful interference to licensed radio stations and that this product accept harmful interference.
Unless the assembled kit is designed to operate under part 15, part 18 or part 95 of this chapter, the operator of the kit must
operate under the authority of an FCC license holder or must secure an experimental authorization under part 5 of this chapter.

3.1.2

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

NOTE: 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

NOTE: 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.

3.2

Canada

3.2.1

For EVMs issued with an Industry Canada Certificate of Conformance to RSS-210 or RSS-247

Concerning EVMs Including Radio Transmitters:

This device complies with Industry Canada license-exempt RSSs. 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.

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.

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.

Summary of Contents for BQ25720

Page 1: ...2 Board Assembly Layout 12 3 3 Schematic 18 List of Figures Figure 2 2 Original Test Setup for BMS035 BQ2572x EVM 7 Figure 2 3 Main Window of the BQ2572x Evaluation Software 8 Figure 2 4 EN_OTG 9 Fig...

Page 2: ...72x is a synchronous NVDC 1 battery buck boost charge controller offering a low component count high efficiency solution for space constrained multi chemistry battery charging applications The NVDC 1...

Page 3: ...ription Factory Setting JP1 Bypass inrush control circuit spa JP1 on bypasses input FETs Q6 and Q7 external selector spa JP1 off CHRG_OK controls Q6 and Q7 external selector Installed JP2 Jumper on Fo...

Page 4: ...5 5 9 15 20 26 V Battery voltage VBAT Voltage applied at VBAT terminal 0 19 2 V Supply current IAC Maximum input current from AC adapter input 0 6 4 A Output current Iout Output current 0 8 A Operati...

Page 5: ...ues are not within specified limits the unit under test has failed Observe A B Observe if A B occurs If they do not occur the unit under test has failed Assembly drawings have locations for jumpers te...

Page 6: ...5 Connect Load 2 in series with a current meter to J5 VBAT and PGND Connect a voltage meter across J5 VBAT and PGND Set 7 V at KEPCO load output Turn off load 2 Note Add a 47 F capacitor on the BAT p...

Page 7: ...ect Charger and click the Next button b For SMBus BQ25720 select Charger_1_00_BQ25720 bqz on the Select a Target Page For I2C BQ25723 select Charger_1_00_BQ25723 bqz on the Select a Target Page c Afte...

Page 8: ...ure 2 3 Main Window of the BQ2572x Evaluation Software Test Summary www ti com 8 BQ25720 BQ25723 Evaluation Module SLUUC74 MAY 2021 Submit Document Feedback Copyright 2021 Texas Instruments Incorporat...

Page 9: ...4 V 0 5 V 5 Turn on LOAD 2 VBAT Load Measure V J5 VBAT 7 V 0 5 V Measure I J5 VBAT 2 A 0 5 V 2 4 2 OTG Function Use the following for OTG function settings 1 Connect a 7 V power supply to the VBAT loa...

Page 10: ...323 SOD 323 BAT54HT1G ON Semiconductor D4 1 Green LED Green SMD 1 6x0 8x0 8mm LTST C190GKT Lite On H1 H2 H3 H4 4 Bumpon Hemisphere 0 44 X 0 20 Clear Transparent Bumpon SJ 5303 CLEAR 3M J1 J5 J6 3 Ter...

Page 11: ...est Point Multipurpose Red TH Red Multipurpose Testpoint 5010 Keystone TP8 TP31 TP39 3 Test Point Multipurpose Black TH Black Multipurpose Testpoint 5011 Keystone U1 1 SMBus I2C 1 4 Cell Narrow VDC Bu...

Page 12: ...illustrate the board assembly and layout images Figure 3 1 Top Assembly Bill of Materials Board Layout and Schematics www ti com 12 BQ25720 BQ25723 Evaluation Module SLUUC74 MAY 2021 Submit Document...

Page 13: ...re 3 2 Bottom Assembly www ti com Bill of Materials Board Layout and Schematics SLUUC74 MAY 2021 Submit Document Feedback BQ25720 BQ25723 Evaluation Module 13 Copyright 2021 Texas Instruments Incorpor...

Page 14: ...gure 3 3 PCB Layer 1 Bill of Materials Board Layout and Schematics www ti com 14 BQ25720 BQ25723 Evaluation Module SLUUC74 MAY 2021 Submit Document Feedback Copyright 2021 Texas Instruments Incorporat...

Page 15: ...gure 3 4 PCB Layer 2 www ti com Bill of Materials Board Layout and Schematics SLUUC74 MAY 2021 Submit Document Feedback BQ25720 BQ25723 Evaluation Module 15 Copyright 2021 Texas Instruments Incorporat...

Page 16: ...gure 3 5 PCB Layer 3 Bill of Materials Board Layout and Schematics www ti com 16 BQ25720 BQ25723 Evaluation Module SLUUC74 MAY 2021 Submit Document Feedback Copyright 2021 Texas Instruments Incorporat...

Page 17: ...gure 3 6 PCB Layer 4 www ti com Bill of Materials Board Layout and Schematics SLUUC74 MAY 2021 Submit Document Feedback BQ25720 BQ25723 Evaluation Module 17 Copyright 2021 Texas Instruments Incorporat...

Page 18: ...Z1 PGND 1 0 R13 VIN 4 3 2 Q9A DCX124EK 7 F 1 6 5 Q9B DCX124EK 7 F 10 0 R10 PGND 10 0k R17 3V3 7 8 1 2 3 5 6 Q7 4 7 8 1 2 3 5 6 Q6 470nF 50V C25 GND 1 2 3 4 J3 0022053041 10uF C26 300k R29 33pF C31 15...

Page 19: ...ther than TI b the nonconformity resulted from User s design specifications or instructions for such EVMs or improper system design or c User has not paid on time Testing and other quality control tec...

Page 20: ...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 in...

Page 21: ...instructions set forth by Radio Law of Japan which includes but is not limited to the instructions below with respect to EVMs which for the avoidance of doubt are stated strictly for convenience and s...

Page 22: ...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 electr...

Page 23: ...R DAMAGES ARE CLAIMED THE EXISTENCE OF MORE THAN ONE CLAIM SHALL NOT ENLARGE OR EXTEND THIS LIMIT 9 Return Policy Except as otherwise provided TI does not offer any refunds returns or exchanges Furthe...

Page 24: ...are subject to change without notice TI grants you permission to use these resources only for development of an application that uses the TI products described in the resource Other reproduction and...

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