bq25046 Supply Datasheet

bq25046 Datasheet, PDF, Equivalent


Part Number

bq25046

Description

Single-Input 5-V Power Supply

Manufacture

etcTI

Total Page 22 Pages
Datasheet
Download bq25046 Datasheet


bq25046
bq25046
www.ti.com
SLUSA83 – SEPTEMBER 2010
1.1A, Single-Input 5-V Power Supply IC for Wireless Power Applications
Check for Samples: bq25046
FEATURES
1
• 30V Input Rating, with 15V Over-Voltage
Protection (OVP) Threshold
• 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
• 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
DESCRIPTION
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.
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.
APPLICATION SCHEMATIC
RX Resonant
Coil Caps
Discrete Rectifier
20 mF
IN
ISET
VDD3.3
OUT
EN1
EN2
BQ25046
5-V
Output
Communication
Modulator
ISET_SCALE
VIN_DIV
COMM
EN1
EN2
DISABLE_
COMM_ILIM
MSP430BQ1010
HI
LO
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

bq25046
bq25046
SLUSA83 – SEPTEMBER 2010
www.ti.com
These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam
during storage or handling to prevent electrostatic damage to the MOS gates.
PART NUMBER(1)
bq25046DQCR
bq25046DQCT
VOUT(REG)
5.0 V
5.0 V
ORDERING INFORMATION
VOVP
15 V
15 V
VVDD3.3
3.3 V
3.3 V
MARKING
OFS
OFS
(1) For the most current package and ordering information, see the Package Option Addendum at the end of this document, or see the TI
Web site at www.ti.com.
ABSOLUTE MAXIMUM RATINGS(1)
over operating free-air temperature range (unless otherwise noted)
Input Voltage
Output Voltage
Input voltage
Input Current
Output Current
(Continuous)
Output Sink Current
Junction temperature, TJ
Storage temperature, TSTG
ESD protection
IN (with respect to VSS)
OUT, VDD3.3, CHG, PG (with respect to VSS)
EN1, EN2, ISET (with respect to VSS)
IN
OUT
VDD3.3
CHG, PG
HBM
CDM
MIN
–0.3 V
–0.3 V
–0.3 V
1.5 A
1.5 A
100 mA
15 mA
–40 °C
–65 °C
MAX
30 V
7V
7V
150 °C
150 °C
2 kV
500 V
(1) Stresses beyond those listed under absolute maximum ratings may cause permanent damage to the device. These are stress ratings
only, and functional operation of the device at these or any other conditions beyond those indicated under recommended operating
conditions is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. All voltage
values are with respect to the network ground terminal unless otherwise noted.
THERMAL INFORMATION
THERMAL METRIC(1)
bq25046
DFN
UNITS
10 PINS
qJA
qJCtop
qJB
yJT
yJB
qJCbot
Junction-to-ambient thermal resistance
Junction-to-case (top) thermal resistance
Junction-to-board thermal resistance
Junction-to-top characterization parameter
Junction-to-board characterization parameter
Junction-to-case (bottom) thermal resistance
71.9
65.2
85.2
°C/W
0.6
29.6
5.1
(1) For more information about traditional and new thermal metrics, see the IC Package Thermal Metrics application report, SPRA953.
RECOMMENDED OPERATING CONDITIONS
VIN
IIN
IOUT
TJ
RISET
IN voltage range
IN operating voltage range
Input current, IN pin
Current, OUT pin
Junction Temperature
Current limit programming resistor
MIN MAX UNIT
3.3 26
V
3.3 9
1.5 A
1.5 A
–40 125 ºC
470 5360 Ω
2 Submit Documentation Feedback
Product Folder Link(s): bq25046
Copyright © 2010, Texas Instruments Incorporated


Features bq25046 www.ti.com SLUSA83 – SEPTEMB ER 2010 1.1A, Single-Input 5-V Power S upply IC for Wireless Power Application s Check for Samples: bq25046 FEATURES 1 • 30V Input Rating, with 15V Over- Voltage Protection (OVP) Threshold • Integrated Charge Current Sense for Wir eless Power Transfer Efficiency Monitor ing • 3.3V, 15mA integrated Low Dropo ut Linear Regulator (VDD3.3) Supplies P ower to MSP430BQ1010 Directly • 2% Ou tput Voltage Regulation • Pin Selecta ble 100mA and 400mA Current Limit Enabl es Robust Communication in Wireless Pow er Systems at any Output Current Level • Soft-Start Feature to Reduce Inrush Current • Status Indication – Powe r 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 DESCRIPTION The bq25046 is a highly integrated linear power supply I C targeted at both wired and wireless power applications. With an accurate 5-V regulated outpu.
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