Power Supply. bq25046 Datasheet

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bq25046 Datasheet
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Part bq25046
Description Single-Input 5-V Power Supply
Feature bq25046; bq25046 www.ti.com SLUSA83 – SEPTEMBER 2010 1.1A, Single-Input 5-V Power Supply IC for Wireless P.
Manufacture etcTI
Datasheet
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Texas Instruments 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



Texas Instruments 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
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Copyright © 2010, Texas Instruments Incorporated



Texas Instruments bq25046
bq25046
www.ti.com
SLUSA83 – SEPTEMBER 2010
ELECTRICAL CHARACTERISTICS
Over junction temperature range 0°C TJ 125°C and recommended supply voltage (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN TYP MAX
INPUT
VUVLO
VHYS-UVLO
VOVP
VHYS-OVP
tBLK(OVP)
tREC(OVP)
Under-voltage lock-out
Hysteresis on UVLO
Input over-voltage protection threshold
Hysteresis on OVP
Input over-voltage blanking time
Input over-voltage recovery time
IIN-USB-CL
USB input I-Limit 100mA
USB input I-Limit 400mA
ISET SHORT CIRCUIT TEST
VIN: 0V 4 V
VIN: 4V 0 V
VIN: 13V 17 V
VIN: 17V 13 V
Time measured from VIN: 17V 13V 1ms
fall-time to CHG = LO, VOUT = 3.5 V
USB100 programmed by EN1/EN2,
RISET < 1.1 kΩ
USB500 programmed by EN1/EN2,
RISET < 1.1 kΩ
3.15
200
14.5
85
360
3.30
260
15.0
150
115
500
91
400
3.45
320
15.5
96
440
RISET
tDGL-SHORT
Continuous Monitor
Deglitch time transition from ISET to IC latched
off
RISET: 500 200, IC latches off after
tDGL-SHORT
300 460
1.5
ILIM-ISET-SHRT Current limit with ISET shorted
QUIESCENT CURRENT
ISET = 0V, IC latches off after tDGL-SHORT 1.5 1.9
2.2
IOUT(PDWN)
IIN(STDBY)
ICC
OUT
Quiescent current into OUT
Standby current into IN pin
Active supply current, IN pin
VIN = 0V
VIN 10V, EN1=EN2=Hi
VIN < 16V, EN1=EN2=Hi
VIN = 6V, no load on OUT pin,
VOUT > VOUT(REG), IC enabled
1
400
800
3
VOUT(REG)
IOUT
Output voltage
Programmed Output current limit range
VOUT(REG) > VOUT > VLOWV, VIN = 5V,
RISET = 470 to 7.5 kΩ,
User Programmable set by EN1/EN2
4.9 5.0 5.1
100 1100
VDO(IN-OUT)
IOUT
VIN – VOUT
Output current limit formula
VIN = 4.9V and IOUT = 1 A
VOUT(REG) > VOUT > VLOWV, VIN = 5V,
User Programmable set by EN1/EN2
280 512
KISET/RI SET
KISET
VDD3.3
Current limit factor
480 530 580
VVDD3.3
VDD3.3 Output Voltage
IVDD3.3(Max) VDD3.3 Maximum Output Current
THERMAL REGULATION
3.2 3.3
15
3.4
TJ(REG)
Temperature Regulation Limit
TJ(OFF)
Thermal shutdown temperature
TJ(OFF-HYS) Thermal shutdown hysteresis
LOGIC LEVELS ON EN1, EN2
115 125
155
20
135
VIL Logic LOW input voltage
VIH Logic HIGH input voltage
RPULLDOWN Pulldown resistor for EN1 and EN2
LOGIC LEVELS ON CHG AND PG
1.4
260
0.4
VOL Output LOW voltage
IIH Leakage current
ISINK = 5 mA
V/CHG = V/PG =5 V
0.4
5
UNIT
V
mV
V
mV
ms
ms
mA
Ω
ms
A
mA
mA
mA
V
mA
mV
A
AΩ
V
mA
°C
°C
°C
V
V
kΩ
V
mA
Copyright © 2010, Texas Instruments Incorporated
Product Folder Link(s): bq25046
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