Texas Instruments BQ24450EVM Скачать руководство пользователя страница 10

Evaluation Board/Kit Important Notice

Texas Instruments (TI) provides the enclosed product(s) under the following conditions:

This evaluation board/kit is intended for use for ENGINEERING DEVELOPMENT, DEMONSTRATION, OR EVALUATION
PURPOSES ONLY 
and is not considered by TI to be a finished end-product fit for general consumer use. Persons handling the
product(s) must have electronics training and observe good engineering practice standards. As such, the goods being provided are
not intended to be complete in terms of required design-, marketing-, and/or manufacturing-related protective considerations,
including product safety and environmental measures typically found in end products that incorporate such semiconductor
components or circuit boards. This evaluation board/kit does not fall within the scope of the European Union directives regarding
electromagnetic compatibility, restricted substances (RoHS), recycling (WEEE), FCC, CE or UL, and therefore may not meet the
technical requirements of these directives or other related directives.

Should this evaluation board/kit not meet the specifications indicated in the User’s Guide, the board/kit may be returned within 30
days from the date of delivery for a full refund. THE FOREGOING WARRANTY IS THE EXCLUSIVE WARRANTY MADE BY
SELLER TO BUYER AND IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESSED, IMPLIED, OR STATUTORY, INCLUDING
ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR ANY PARTICULAR PURPOSE.

The user assumes all responsibility and liability for proper and safe handling of the goods. Further, the user indemnifies TI from all
claims arising from the handling or use of the goods. Due to the open construction of the product, it is the user’s responsibility to
take any and all appropriate precautions with regard to electrostatic discharge.

EXCEPT TO THE EXTENT OF THE INDEMNITY SET FORTH ABOVE, NEITHER PARTY SHALL BE LIABLE TO THE OTHER
FOR ANY INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES.

TI currently deals with a variety of customers for products, and therefore our arrangement with the user is not exclusive.

TI assumes no liability for applications assistance, customer product design, software performance, or infringement of
patents or services described herein.

Please read the User’s Guide and, specifically, the Warnings and Restrictions notice in the User’s Guide prior to handling the
product. This notice contains important safety information about temperatures and voltages. For additional information on TI’s
environmental and/or safety programs, please contact the TI application engineer or visit

www.ti.com/esh

.

No license is granted under any patent right or other intellectual property right of TI covering or relating to any machine, process, or
combination in which such TI products or services might be or are used.

FCC Warning

This evaluation board/kit is intended for use for ENGINEERING DEVELOPMENT, DEMONSTRATION, OR EVALUATION
PURPOSES ONLY 
and is not considered by TI to be a finished end-product fit for general consumer use. It generates, uses, and
can radiate radio frequency energy and has not been tested for compliance with the limits of computing devices pursuant to part 15
of FCC rules, which are designed to provide reasonable protection against radio frequency interference. Operation of this
equipment in other environments may cause interference with radio communications, in which case the user at his own expense
will be required to take whatever measures may be required to correct this interference.

EVM Warnings and Restrictions

It is important to operate this EVM within the input voltage range of 9.5 V to 10.5 V and the output voltage range of 4 V to 7.5 V .

Exceeding the specified input range may cause unexpected operation and/or irreversible damage to the EVM. If there are
questions concerning the input range, please contact a TI field representative prior to connecting the input power.

Applying loads outside of the specified output range may result in unintended operation and/or possible permanent damage to the
EVM. Please consult the EVM User's Guide prior to connecting any load to the EVM output. If there is uncertainty as to the load
specification, please contact a TI field representative.

During normal operation, some circuit components may have case temperatures greater than 75° C. The EVM is designed to
operate properly with certain components above 75° C as long as the input and output ranges are maintained. These components
include but are not limited to linear regulators, switching transistors, pass transistors, and current sense resistors. These types of
devices can be identified using the EVM schematic located in the EVM User's Guide. When placing measurement probes near
these devices during operation, please be aware that these devices may be very warm to the touch.

Mailing Address: Texas Instruments, Post Office Box 655303, Dallas, Texas 75265

Copyright © 2010, Texas Instruments Incorporated

Содержание BQ24450EVM

Страница 1: ...harge 4 4 2 Max Charge 4 4 3 Charge Termination 4 4 4 Re Charge 4 5 Functions and Features 5 5 1 Changing Output Voltage and Charge Current 5 5 2 Options for External Transistor 6 5 3 Other Options 6...

Страница 2: ...ents limited only by the selection of the external pass transistor The versatile driver for the external pass transistor provides at least 25mA of base drive In addition to the voltage and current reg...

Страница 3: ...2 3 Meters Three Fluke 75 DMMs equivalent or better 3 Equipment Setup The original test setup of HPA691 is shown in Figure 1 1 Set the PS 1 for 10V 1A current limit and then turn off supply Connect P...

Страница 4: ...s is the pre charge current 4 2 Max Charge Adjust PS 2 such that VM 2 shows 6 VDC Using VM 3 measure the voltage across the current sense resistor on Load 1 Multiply this value by a conversion factor...

Страница 5: ...on board resistors R7 R8 R9 R11 R12 See the bq24450 datasheet for information on how to size these resistors If Vout is changed Vin must also be changed Vin should be high enough to allow for the nece...

Страница 6: ...JP3 such that it connects Pin 15 of the IC to the collector of Q1 2 Remove R6 and replace with Rp as calculated on page 13 of the data sheet 5 3 Other Options Disabling Pre Charge Mode The EVM is pop...

Страница 7: ...pen Resistor Chip 1 16W 1 603 Std Std R15 R2 0 56 Resistor Chip 1 2W 1 2010 STD STD R3 R6 0 Resistor Chip 1 16W 603 Std Std R4 0 Resistor Chip 1 2W 2010 CRCW20100000Z0EF Vishay R7 475k Resistor Chip 1...

Страница 8: ...ials Board Layouts and Schematic www ti com 7 2 Board Layout Figure 4 Top Assembly Layer Figure 5 Top PCB Layer 8 bq24450EVM SLUU464 November 2010 Submit Documentation Feedback 2010 Texas Instruments...

Страница 9: ...l of Materials Board Layouts and Schematic Figure 6 Bottom PCB Layer 7 3 Schematic Figure 7 bq24450 EVM Schematic 9 SLUU464 November 2010 bq24450EVM Submit Documentation Feedback 2010 Texas Instrument...

Страница 10: ...uct This notice contains important safety information about temperatures and voltages For additional information on TI s environmental and or safety programs please contact the TI application engineer...

Страница 11: ...h statements TI products are not authorized for use in safety critical applications such as life support where a failure of the TI product would reasonably be expected to cause severe personal injury...

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