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BQ25046

更新时间： 2024-09-28 08:59:07
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德州仪器 - TI 无线
页数 文件大小 规格书
19页 1882K
描述
1.1A, Single-Input 5-V Power Supply IC for Wireless Power Applications

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BQ25046 数据手册

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bq25046  
www.ti.com  
SLUSA83 –SEPTEMBER 2010  
1.1A, Single-Input 5-V Power Supply IC for Wireless Power Applications  
Check for Samples: bq25046  
1
FEATURES  
DESCRIPTION  
•
•
•
30V Input Rating, with 15V Over-Voltage  
Protection (OVP) Threshold  
The bq25046 is a highly integrated linear power  
supply IC targeted at both wired and wireless power  
applications. With an accurate 5-V regulated output  
and integrated 3.3-V LDO, the bq25046 is an ideal  
solution for wireless power supply solutions up to 5  
W.  
Integrated Charge Current Sense for Wireless  
Power Transfer Efficiency Monitoring  
3.3V, 15mA integrated Low Dropout Linear  
Regulator (VDD3.3) Supplies Power to  
MSP430BQ1010 Directly  
The bq25046 integrates several functions which  
enable a wireless charging solution within a small  
area and low component count. These include a  
3.3-V LDO which drives an MSP430BQ1010 wireless  
controller, high-accuracy current sense for calculating  
receiver-side power usage, 100mA/400mA current  
limits enable robust communication at all load current  
levels, and integrated pass FET acts as load  
disconnect switch and 5-V regulator to protect  
downstream circuitry. In addition, the bq25046 has an  
absolute maximum input voltage of 30 V and an OVP  
threshold of 15 V, which enables safe and robust  
operation in inductive power transfer systems that  
use either resistive or capacitive load modulation.  
•
•
2% Output Voltage Regulation  
Pin Selectable 100mA and 400mA Current  
Limit Enables Robust Communication in  
Wireless Power Systems at any Output  
Current Level  
•
•
Soft-Start Feature to Reduce Inrush Current  
Status Indication – Power Good (PG) and  
Output Enabled (CHG)  
•
Available in Small 2mm × 3mm DFN-10  
Package  
APPLICATIONS  
•
•
•
•
•
Wireless Power Applications  
Smart Phones  
PDAs  
MP3 Players  
Low-Power Handheld Devices  
APPLICATION SCHEMATIC  
RX  
Coil  
Resonant  
Caps  
Discrete Rectifier  
5-V  
Output  
IN  
OUT  
EN1  
EN2  
20 mF  
ISET  
VDD3.3  
BQ25046  
EN1  
EN2  
ISET_SCALE  
VIN_DIV  
HI  
LO  
DISABLE_  
COMM_ILIM  
COMM  
MSP430BQ1010  
Communication  
Modulator  
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas  
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.  
PRODUCTION DATA information is current as of publication date.  
Products conform to specifications per the terms of the Texas  
Instruments standard warranty. Production processing does not  
necessarily include testing of all parameters.  
Copyright © 2010, Texas Instruments Incorporated  
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