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EVM User's Guide: BQ25308EVM
BQ25308 Evaluation Module
Description
The BQ25308 is a highly-integrated standalone
switch-mode battery charger for 1-cell Li-ion and
Li-polymer, and LiFePO4 batteries. The BQ25308
supports 4.1V to 17V input voltage and 3A fast charge
current. The integrated current sensing topology of
the device enables high charge efficiency and low
BOM cost. The best-in-class 200nA low quiescent
current of the device conserves battery energy and
maximizes the shelf time for portable devices. The
BQ25308 is available in a 3x3 WQFN package for
easy 2-layer layout and space limited applications.
Features
•
Standalone charger and easy to configure
•
High-efficiency, 1.2MHz, synchronous switchmode
buck charger
– 92.5% charge efficiency at 2A from 5V input for
1-cell battery
– 91.8% charge efficiency at 2A from 9V input for
1-cell battery
•
Single input to support USB input and high voltage
adapters
– Support 4.1V - 17V input voltage range with
28V absolute maximum input voltage rating
– Input Voltage Dynamic Power Management
(VINDPM) tracking battery voltage
SLUUD09 – APRIL 2024
Submit Document Feedback
•
3.6V / 4.05V / 4.15V / 4.2V charge voltage
•
3.0A maximum fast charge current
•
200nA low battery leakage current at 4.5V VBAT
•
4.25µA VBUS supply current in IC disable mode
•
Charge accuracy
– ±0.5% charge voltage regulation
– ±10% charge current regulation
•
Safety
– Disable charge for dead battery condition
– Thermal regulation and thermal shutdown
– Input Under-Voltage Lockout (UVLO) and
– Battery overcharge protection
– Safety timer for precharge and fast charge
– Charge disabled if current setting pin ICHG is
– Cold/hot battery temperature protection
– Fault report on STAT pin
Applications
•
Wireless speaker
•
Barcode scanner
•
Gaming
•
Cradle charger
•
Cordless power tool
•
Building automation
•
Medical
BQ25308EVM Hardware Board
Copyright © 2024 Texas Instruments Incorporated
OverVoltage Protection (OVP)
open or short
BQ25308 Evaluation Module
Description
1
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Table of Contents
Related Manuals for Texas Instruments BQ25308
Summary of Contents for Texas Instruments BQ25308
- Page 1 – Thermal regulation and thermal shutdown maximizes the shelf time for portable devices. The – Input Under-Voltage Lockout (UVLO) and BQ25308 is available in a 3x3 WQFN package for OverVoltage Protection (OVP) easy 2-layer layout and space limited applications. – Battery overcharge protection –...
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Page 2: Kit Contents
The BQ25308EVM is an evaluation kit for the BQ25308 integrated battery charge management IC. This user's guide provides detailed testing instructions for the BQ25308 evaluation module (EVM). Also included are descriptions of the necessary equipment, equipment setup, procedures, the printed-circuit board layouts, schematics, and the bill of materials (BOM). - Page 3 Alternative Option: A 0–20 V/0–5 A, > 30-W DC electronic load set in a constant voltage loading mode. 3. Meters: (4x) Fluke 75 multimeters (equivalent or better). 4. No software is required to test this part. SLUUD09 – APRIL 2024 BQ25308 Evaluation Module Submit Document Feedback Copyright © 2024 Texas Instruments Incorporated...
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Page 4: Equipment Setup
9. Connect the output of PS2 to TP7 (TS) and TP12 (PGND) as shown in Figure 2-1. 10. Install shunts as shown in Table 2-2. Load #1 Power Supply Power Supply Figure 2-1. Original Test Setup for BMS005 BQ25308 Evaluation Module SLUUD09 – APRIL 2024 Submit Document Feedback Copyright © 2024 Texas Instruments Incorporated... -
Page 5: Test Setup And Results
Implementation Results 3 Implementation Results 3.1 Test Setup and Results 3.1.1 Test Procedure 3.1.1.1 Initial Settings Use the following steps to enable the BQ25308 EVM test setup: 1. Make sure Section 2.3 steps have been followed. 2. Turn on PS1. - Page 6 BAT pin. When using 4-wire sensing, always make sure that the sensing leads are connected to prevent accidental overvoltage by the power leads. BQ25308 Evaluation Module SLUUD09 – APRIL 2024 Submit Document Feedback Copyright © 2024 Texas Instruments Incorporated...
- Page 7 200k 30.9k FB_GND Green 10.2k STAT TP10 TP11 TP12 5010 5014 5012 5012 5019 5011 5019 5011 5012 VSET_FB VBUS STAT Figure 4-1. Schematic SLUUD09 – APRIL 2024 BQ25308 Evaluation Module Submit Document Feedback Copyright © 2024 Texas Instruments Incorporated...
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Page 8: Pcb Layout
Attachment Application Report. 4.2.1 Board Layout The board layout is shown in Figure 4-2 Figure 4-7. Figure 4-3. Top Solder Figure 4-2. Top Overlay BQ25308 Evaluation Module SLUUD09 – APRIL 2024 Submit Document Feedback Copyright © 2024 Texas Instruments Incorporated... - Page 9 Hardware Design Files Figure 4-4. Top Layer Figure 4-5. Bottom Layer Figure 4-6. Bottom Solder Figure 4-7. Bottom Overlay SLUUD09 – APRIL 2024 BQ25308 Evaluation Module Submit Document Feedback Copyright © 2024 Texas Instruments Incorporated...
- Page 10 RES, 5.23 k, 1%, 0.063 W, AEC-Q200 CRCW04025K23FKE 5.23k 0402 Vishay-Dale Grade 0, 0402 RES, 2.20 k, 1%, 0.063 W, AEC-Q200 CRCW04022K20FKE 2.20k 0402 Vishay-Dale Grade 0, 0402 BQ25308 Evaluation Module SLUUD09 – APRIL 2024 Submit Document Feedback Copyright © 2024 Texas Instruments Incorporated...
- Page 11 0402 MuRata C0G/NP0, 0402 CAP, CERM, 0.01µF, 16V, ±10%, C0402C103K4RACT 0.01µF 0402 Kemet X7R, 0402 Diode, Schottky, 30V, 1A, SOD-123 SOD-123 B130LAW-7-F Diodes Inc. SLUUD09 – APRIL 2024 BQ25308 Evaluation Module Submit Document Feedback Copyright © 2024 Texas Instruments Incorporated...
- Page 12 969102-0000-DA 3M JP7, SH-JP8, SH-JP10 Unless otherwise noted in the Alternate Part Number and/or Alternate Manufacturer columns, all parts can be substituted with equivalents. BQ25308 Evaluation Module SLUUD09 – APRIL 2024 Submit Document Feedback Copyright © 2024 Texas Instruments Incorporated...
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Page 13: Additional Information
Additional Information 5 Additional Information 5.1 Trademarks All trademarks are the property of their respective owners. SLUUD09 – APRIL 2024 BQ25308 Evaluation Module Submit Document Feedback Copyright © 2024 Texas Instruments Incorporated... - Page 14 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 15 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 16 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 17 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 18 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 19 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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