Texas Instruments BQ25856EVM User Manual
Texas Instruments BQ25856EVM User Manual

Texas Instruments BQ25856EVM User Manual

Bq25856 evaluation module

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EVM User's Guide: BQ25856EVM
BQ25856 Evaluation Module
Description
The BQ25856EVM evaluation module (EVM) is a
complete evaluation system for the BQ25856 IC, a
buck-boost battery charge controller with a wide input
range of 4.2V - 70V, a wide output voltage range of
up to 70V, bi-directional capabilities, and AEC-Q100
qualification.
The BQ25856EVM 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 BQ25856 BQZ file
4. Download the BQ25856 EVM design files on
ti.com
Features
Wide input voltage operating range: 4.2 V–55 V
Wide output operating range: up to 55V with
CC/CV support for:
SLUUD27 – MAY 2024
Submit Document Feedback
– 2– to 13–Cell Li-Ion
– 2– to 14–Cell LiFePO4
Synchronous buck-boost 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
AEC-Q100 qualification
Copyright © 2024 Texas Instruments Incorporated
600kHz
efficiency
protection
BQ25856 Evaluation Module
Description
1

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Summary of Contents for Texas Instruments BQ25856EVM

  • Page 1 – Optional synchronization to external clock qualification. – Optional gate driver supply input for optimized efficiency The BQ25856EVM has a max input and output of 55V • Resistor-programmable standalone with added I2C and a max charge current of 10A. Mode •...
  • Page 2: Kit Contents

    1 Evaluation Module Overview 1.1 Introduction The BQ25856EVM can be evaluated for the full 240 W range of USB Extended Power Range (EPR) and up to 13 cell Li-Ion battery charging implementing CC/CV profile. Typical applications include USB-PD extended power range applications, docking station, monitor, and dual-battery charging.
  • Page 3 Evaluation Module Overview 1.4 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 The circuit module has signal traces, components, and component leads on the bottom of the board. This can result in exposed voltages, hot surfaces or sharp edges. Do not reach under the board during operation. BQ25856 Evaluation Module SLUUD27 – MAY 2024 Submit Document Feedback Copyright © 2024 Texas Instruments Incorporated...
  • Page 5 CAUTION The board has no fuse installed and relies on the external voltage source current limit to verify circuit protection. 2 Hardware 2.1 Board Parameters Table 2-1. Default Board Setup for BQ25856EVM Description Value Unit ACUV Input undervoltage...
  • Page 6: Recommended Operating Conditions

    Installed general purpose indicator. JP16 Shunt JP16 to generate on board 3.3V pullup rail. Installed 2.3 Recommended Operating Conditions Table 2-5. Recommended Operating Conditions for BQ25856EVM Description UNIT VIN (J1) Input voltage to the EVM VOUT (J3) Output voltage of the EVM...
  • Page 7: Power Supplies

    2. Connect the output of power supply #1 in series with a current meter to J1 (VIN and PGND). 3. Connect a voltage meter across J1 (VIN) and J1 (PGND). SLUUD27 – MAY 2024 BQ25856 Evaluation Module Submit Document Feedback Copyright © 2024 Texas Instruments Incorporated...
  • Page 8 BQ25856 bqz file work for this test. c. After selecting the target device, click Field View and then click the Read Register button. 10. Set WATCHDOG and EN_CHG to disabled. BQ25856 Evaluation Module SLUUD27 – MAY 2024 Submit Document Feedback Copyright © 2024 Texas Instruments Incorporated...
  • Page 9 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. SLUUD27 – MAY 2024 BQ25856 Evaluation Module Submit Document Feedback Copyright © 2024 Texas Instruments Incorporated...
  • Page 10 Select Charger_1_00_BQ25756.bqz on the Select a Target Page. Both the BQ25756 bqz file or the BQ25856 bqz file work for this test. c. After selecting the target device, click Field View and then click the Read Register button. BQ25856 Evaluation Module SLUUD27 – MAY 2024 Submit Document Feedback Copyright © 2024 Texas Instruments Incorporated...
  • Page 11 16. Set power supply #1 for 40V, measure V(J1(VAC)) = 40V ± 0.5V I(J1(IAC)) = 1.4A ± 0.5A V(J3(VBAT)) = 13V ± 0.5V I(J3(IBAT)) = 3.9A ± 0.5A SLUUD27 – MAY 2024 BQ25856 Evaluation Module Submit Document Feedback Copyright © 2024 Texas Instruments Incorporated...
  • 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. BQ25856 EVM Schematic BQ25856 Evaluation Module SLUUD27 – MAY 2024 Submit Document Feedback Copyright © 2024 Texas Instruments Incorporated...
  • Page 13 100V 100pF PGND C516 C517 C518 C519 C506 C507 15uF 15uF 15uF 15uF 15uF 15uF 100nF D 100V 100k 100k 100V 1µF 100V PGND SLUUD27 – MAY 2024 BQ25856 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 BQ25856 Evaluation Module SLUUD27 – MAY 2024 Submit Document Feedback Copyright © 2024 Texas Instruments Incorporated...
  • Page 15 For BQ25756 variant, Install JP1, JP4, JP5, JP6, JP9, JP10, pin 1-2 of JP12, JP13, JP14, JP15, and JP16 1. DNP means "Do Not Populate". SLUUD27 – MAY 2024 BQ25856 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 BQ25856 Evaluation Module SLUUD27 – MAY 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 SLUUD27 – MAY 2024 BQ25856 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 BQ25856 Evaluation Module SLUUD27 – MAY 2024 Submit Document Feedback Copyright © 2024 Texas Instruments Incorporated...
  • Page 19 0603 D2, D3 V1FM10-M3/H Vishay Diode Schottky 1A Surface Mount DO-219AB DO-219AB (SMF) D4, D5, D6 Green 150060VS75000 Wurth Elektronik LED, Green, SMD LED_0603 SLUUD27 – MAY 2024 BQ25856 Evaluation Module Submit Document Feedback Copyright © 2024 Texas Instruments Incorporated...
  • Page 20 RES Thick Film, 10Ω, 1%, 0.75W, 1206 100ppm/°C, 1206 1.00Meg CRCW08051M00FKEAC Vishay / Dale Thick Film Resistors - SMD 1/8Watt 1MΩ 1% Commercial Use BQ25856 Evaluation Module SLUUD27 – MAY 2024 Submit Document Feedback Copyright © 2024 Texas Instruments Incorporated...
  • Page 21 0805 (2012 Metric) - Metal Element SH-JP1, SH-JP2, SNT-100-BK-G Samtec Shunt, 100mil, Gold plated, Black Shunt SH-JP3, SH-JP4, SH-JP5, SH-JP6, SH-JP7, SH-JP8, SH-JP9, SH-JP10, SH-JP11 SLUUD27 – MAY 2024 BQ25856 Evaluation Module Submit Document Feedback Copyright © 2024 Texas Instruments Incorporated...
  • Page 22 TP37, TP38, point_Keystone_Comp TP39, TP40, TP47 BQ25756RRVT Texas Instruments BQ25756RRVT VQFN36 LT3010EMS8E-PBF Analog Devices Linear Voltage Regulator IC Positive MSOP8 Adjustable 1 Output 50mA 8-MSOP-EP BQ25856 Evaluation Module SLUUD27 – MAY 2024 Submit Document Feedback Copyright © 2024 Texas Instruments Incorporated...
  • Page 23: Additional Information

    Additional Information 4 Additional Information 4.1 Trademarks PowerPAK ® is a registered trademark of Vishay. All trademarks are the property of their respective owners. SLUUD27 – MAY 2024 BQ25856 Evaluation Module Submit Document Feedback Copyright © 2024 Texas Instruments Incorporated...
  • Page 24 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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