Texas Instruments BQ25820 User Manual
Texas Instruments BQ25820 User Manual

Texas Instruments BQ25820 User Manual

Evaluation module
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EVM User's Guide: BQ25820EVM
BQ25820 Evaluation Module
Description
The BQ25820EVM evaluation module (EVM) is an
evaluation system for the BQ25820 IC. The BQ25820
IC is a buck battery charge controller with direct
power path control. The BQ25820 has a wide input
range of 4.2V – 70V, a wide output voltage range
of up to 70V, and bi-directional capabilities. The
BQ25820EVM has a max input and output of 55V and
a max charge current of 10A.
Get Started
1. Order the EVM on
ti.com
2. Order the
EV2400
to communicate with the EVM
3. Download the BQ25820 BQZ file
4. Download the BQ25820 EVM design files on
ti.com
Features
Wide input voltage operating range: 4.2V–55V
Wide output operating range: up to 55V with
CC/CV support for:
SLUUD36 – JULY 2024
Submit Document Feedback
– 1– to 13–Cell Li-Ion
– 1– to 14–Cell LiFePO4
Synchronous buck DC/DC charge controller with
NFET drivers
– Adjustable switching frequency from 200kHz to
– Optional synchronization to external clock
– Optional gate driver supply input for optimized
Resistor-programmable standalone with added I2C
mode
Built in MPPT to maximize power from solar panel
arrays
Power up from battery (reverse mode) output 4V to
55V
High safety integration
– Adjustable input overvoltage and undervoltage
– Output overvoltage and overcurrent protection
Copyright © 2024 Texas Instruments Incorporated
600kHz
efficiency
protection
BQ25820 Evaluation Module
Description
1

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Summary of Contents for Texas Instruments BQ25820

  • Page 1 – Adjustable switching frequency from 200kHz to IC is a buck battery charge controller with direct 600kHz power path control. The BQ25820 has a wide input – Optional synchronization to external clock range of 4.2V – 70V, a wide output voltage range –...
  • Page 2: Kit Contents

    Besides the I2C host-controlled charging mode, the device also supports programmable hardware limits. Input current, and output current regulation targets can be set with single resistor on the IIN, and IOUT pins, respectively. BQ25820 Evaluation Module SLUUD36 – JULY 2024 Submit Document Feedback Copyright © 2024 Texas Instruments Incorporated...
  • Page 3 Evaluation Module Overview 1.5 General Texas Instruments High Voltage Evaluation (TI HV EMV) User Safety Guidelines WARNING Always follow TI's set-up and application instructions, including use of all interface components within the recommended electrical rated voltage and power limits. Always use electrical safety precautions to help verify your personal safety and those working around you.
  • Page 4: General Safety Information

    1.5.1 General Safety Information The following warnings and cautions are noted for the safety of anyone using or working close to the BQ25820 EVM. Observe all safety precautions. The BQ25820EVM circuit module can become hot during operation due to dissipation of heat.
  • Page 5 Hardware CAUTION The default settings of the BQ25820 is possibly not designed for the user's application. Verify the EVM settings are set appropriately for test setup before device power up. Set all protections appropriately and limit current for safe operation.
  • Page 6 Shunt JP15 to connect STAT1 to a pullup rail. The STAT1 pin can also be used as a Installed JP15 general purpose indicator. JP16 Shunt JP16 to generate on board 3.3V pullup rail. Installed BQ25820 Evaluation Module SLUUD36 – JULY 2024 Submit Document Feedback Copyright © 2024 Texas Instruments Incorporated...
  • Page 7: Power Supplies

    A computer with at least one USB port and a USB cable. 5. EV2400 Communication Kit: 6. Software: Download and properly install bqStudio from https://www.ti.com/tool/BQSTUDIO. 2.3.1 Equipment Set Up SLUUD36 – JULY 2024 BQ25820 Evaluation Module Submit Document Feedback Copyright © 2024 Texas Instruments Incorporated...
  • Page 8 Select Charger_1_00_BQ25820.bqz on the Select a Target Page. c. After selecting the target device, click Field View. and then click the Read Register button. BQ25820 Evaluation Module SLUUD36 – JULY 2024 Submit Document Feedback Copyright © 2024 Texas Instruments Incorporated...
  • Page 9 V(J3(VBAT)) = 23V ± 0.5V I(J3(IBAT)) = 3.9A ± 0.5A Use the following guidelines to test the BQ25820 EVM power path: 1. Disconnect the power supply from J1 (VIN and PGND) and disconnect Load 1 from J3 (VOUT and PGND).
  • Page 10 Select Charger_1_00_BQ25820.bqz on the Select a Target Page. c. After selecting the target device, click Field View. and then click the Read Register button. BQ25820 Evaluation Module SLUUD36 – JULY 2024 Submit Document Feedback Copyright © 2024 Texas Instruments Incorporated...
  • Page 11 V(J3(VBAT)) = 23. V ± 0.5V I(J3(IBAT)) = 2A ± 0.5A Use the following guidelines to test the BQ25820 EVM power path: 1. Disconnect the power supply from J1 (VIN and PGND) and disconnect Load 1 from J3 (VOUT and PGND).
  • Page 12 Avoid physical contact with any part of the board when power is active PGND Output power limited by circuit operating conditions and power stage components Figure 3-1. BQ25820EVM Schematic BQ25820 Evaluation Module SLUUD36 – JULY 2024 Submit Document Feedback Copyright © 2024 Texas Instruments Incorporated...
  • Page 13 100pF PGND C516 C517 C518 C519 C506 C507 15uF 15uF 15uF 15uF 15uF 15uF R401 R400 100V 100nF 100k 100k 100V 1µF 100V PGND SLUUD36 – JULY 2024 BQ25820 Evaluation Module Submit Document Feedback Copyright © 2024 Texas Instruments Incorporated...
  • Page 14 TP33 TP34 TP35 TP36 TP37 TP38 TP39 TP47 TP40 HIDRV1 BTST1 HIDRV2 BTST2 STAT1 /INT STAT2 3V3_PULLUP PGND PGND PGND PGND PGND PGND PGND BQ25820 Evaluation Module SLUUD36 – JULY 2024 Submit Document Feedback Copyright © 2024 Texas Instruments Incorporated...
  • Page 15 For BQ25758 variant, Install JP4, JP5, JP6, JP9, JP10, pin 1-2 of JP12, JP13, JP14, JP15, and JP16 Assembly Note For BQ25756 variant, Install JP1, JP4, JP5, JP6, JP9, JP10, pin 1-2 of JP12, JP13, JP14, JP15, and JP16 SLUUD36 – JULY 2024 BQ25820 Evaluation Module Submit Document Feedback Copyright © 2024 Texas Instruments Incorporated...
  • Page 16: Pcb Layout

    Hardware Design Files www.ti.com 3.2 PCB Layout Figure 3-2. Top Layer and Overlay Figure 3-3. Layer 2 -GND BQ25820 Evaluation Module SLUUD36 – JULY 2024 Submit Document Feedback Copyright © 2024 Texas Instruments Incorporated...
  • Page 17 Hardware Design Files Figure 3-4. Signal Layer 1 Figure 3-5. Signal Layer 2 SLUUD36 – JULY 2024 BQ25820 Evaluation Module Submit Document Feedback Copyright © 2024 Texas Instruments Incorporated...
  • Page 18 Hardware Design Files www.ti.com Figure 3-6. Layer 5 - GND Figure 3-7. Bottom Layer and Overlay BQ25820 Evaluation Module SLUUD36 – JULY 2024 Submit Document Feedback Copyright © 2024 Texas Instruments Incorporated...
  • Page 19 Diode Standard 100V 1A Surface Mount VS-1EMH01HM3/5AT DO-214AC Vishay DO-214AC (SMA) FID1, FID2, FID3, Fiducial mark. There is nothing to buy or FID4, FID5, FID6 mount. SLUUD36 – JULY 2024 BQ25820 Evaluation Module Submit Document Feedback Copyright © 2024 Texas Instruments Incorporated...
  • Page 20 RES Thick Film, 10Ω, 1%, 0.75W, 100ppm/°C, CRCW120610R0FKEAHP 1206 Vishay Dale 1206 1.00Meg Thick Film Resistors - SMD 1/8Watt 1Mohms CRCW08051M00FKEAC 0805 Vishay / Dale 1% Commercial Use BQ25820 Evaluation Module SLUUD36 – JULY 2024 Submit Document Feedback Copyright © 2024 Texas Instruments Incorporated...
  • Page 21 (2012 Metric) - Metal Element SH-JP1, SH-JP2, Shunt, 100mil, Gold plated, Black SNT-100-BK-G Shunt Samtec SH-JP3, SH-JP4, SH-JP5, SH-JP6, SH-JP7, SH-JP8, SH-JP9, SH-JP10, SH-JP11 SLUUD36 – JULY 2024 BQ25820 Evaluation Module Submit Document Feedback Copyright © 2024 Texas Instruments Incorporated...
  • Page 22 TP38, TP39, TP40, pact TP47 BQ25820RRVT BQ25820RRVT VQFN36 Texas Instruments Linear Voltage Regulator IC Positive LT3010EMS8E-PBF MSOP8 Analog Devices Adjustable 1 Output 50mA 8-MSOP-EP BQ25820 Evaluation Module SLUUD36 – JULY 2024 Submit Document Feedback Copyright © 2024 Texas Instruments Incorporated...
  • Page 23: Additional Information

    Additional Information 4 Additional Information 4.1 Trademarks All trademarks are the property of their respective owners. SLUUD36 – JULY 2024 BQ25820 Evaluation Module Submit Document Feedback Copyright © 2024 Texas Instruments Incorporated...
  • Page 24 STANDARD TERMS FOR EVALUATION MODULES Delivery: TI delivers TI evaluation boards, kits, or modules, including any accompanying demonstration software, components, and/or documentation which may be provided together or separately (collectively, an “EVM” or “EVMs”) to the User (“User”) in accordance with the terms set forth herein.
  • Page 25 www.ti.com 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.
  • Page 26 www.ti.com 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...
  • Page 27 www.ti.com EVM Use Restrictions and Warnings: 4.1 EVMS ARE NOT FOR USE IN FUNCTIONAL SAFETY AND/OR SAFETY CRITICAL EVALUATIONS, INCLUDING BUT NOT LIMITED TO EVALUATIONS OF LIFE SUPPORT APPLICATIONS. 4.2 User must read and apply the user guide and other available documentation provided by TI regarding the EVM prior to handling or using the EVM, including without limitation any warning or restriction notices.
  • Page 28 Notwithstanding the foregoing, any judgment may be enforced in any United States or foreign court, and TI may seek injunctive relief in any United States or foreign court. Mailing Address: Texas Instruments, Post Office Box 655303, Dallas, Texas 75265 Copyright © 2023, Texas Instruments Incorporated...
  • Page 29 TI products. TI’s provision of these resources does not expand or otherwise alter TI’s applicable warranties or warranty disclaimers for TI products. TI objects to and rejects any additional or different terms you may have proposed. IMPORTANT NOTICE Mailing Address: Texas Instruments, Post Office Box 655303, Dallas, Texas 75265 Copyright © 2024, Texas Instruments Incorporated...

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