TI1 MSP430BQ1010 Wireless receiver-side communication and power monitoring ic Datasheet

MSP430BQ1010
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SLAS696 – DECEMBER 2010
WIRELESS RECEIVER-SIDE COMMUNICATION AND POWER MONITORING IC
FOR WIRELESS POWER
Check for Samples: MSP430BQ1010
•
•
•
•
•
•
•
•
Enables Wireless Power Solution
Communication and Voltage/Current
Monitoring
WPC-Compliant Communication Protocol
Unique Device ID
Supports TI's BQ25046
Optional Battery Power Transfer Termination
Fixed-Function Device – No Software
Development Required
5-mm x 5-mm x 0.75-mm 32-Pin RTV (QFN)
Package
APPLICATIONS
•
Low-Power (<5 W) Portable Devices Powered
by Lithium-Ion Batteries Including:
– Cell Phones, Smart Phones
– Headsets
– PDAs
– Portable Media Players
– Other Hand-Held Devices
DESCRIPTION
MSP430BQ1010 is an advanced fixed-function
device that forms the control and communications
unit on the receiver side for wireless power transfer in
portable applications. MSP430BQ1010 complies with
the Wireless Power Consortium (WPC) specification.
Together with a WPC-compliant transmitter-side
controller, a complete wireless power system is
enabled.
In a wireless power solution, power is transferred
from the transmitter coil in the charging pad to the
receiver coil embedded in the portable device, based
on near-field magnetic induction. Feedback
information from the receiver is transmitted back to
the transmitter via changes in the reflected
impedance of the receiver device.
The receiver side on the mobile/portable device
consists of a rectification circuit, a voltageconditioning unit, and a control and communications
unit. The MSP430BQ1010 device is the control and
communications unit that comprises the digital logic
part of the receiver. This unit executes the relevant
power-control algorithms and protocols, monitors
various voltage and current levels, and provides
feedback to the transmitter via the communications
modulator. MSP430BQ1010 devices are specifically
configured and preprogrammed to be fully compliant
with the Wireless Power Consortium standards. The
Wireless Power Consortium has developed a
standard for wireless charging technology to ensure
interoperability between various primary and receiver
devices.
Wireless Power Consortium (WPC)
The consortium is a cooperation of companies,
including Texas Instruments, that wants to ensure
that
the
products
created
are
completely
interoperable. MSP430BQ1010, as part of the
wireless charging receiver solution, complies with the
WPC standard.
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.
PRODUCT PREVIEW information concerns products in the
formative or design phase of development. Characteristic data and
other specifications are design goals. Texas Instruments reserves
the right to change or discontinue these products without notice.
Copyright © 2010, Texas Instruments Incorporated
PRODUCT PREVIEW
FEATURES
1
MSP430BQ1010
SLAS696 – DECEMBER 2010
Resonant
RX
Coil Capacitors
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Discrete Rectifier
IN
20 pF
5-V Output
OUT
ISET
EN1
VDD13
EN2
BQ25046
ISET_SCALE
EN1
VIN_DIV
EN2
COMM
DISABLE_
COMM_ILIM
HI
LO
MSP430BQ1010
PRODUCT PREVIEW
Communication
Modulator
Figure 1. Application Schematic
AVAILABLE OPTIONS (1)
PACKAGED DEVICES (2)
TA
PLASTIC 32-PIN QFN (RTV)
–40°C to 85°C
(1)
(2)
MSP430BQ1010IRTV
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.
Package drawings, thermal data, and symbolization are available at
www.ti.com/packaging.
ABSOLUTE MAXIMUM RATINGS (1)
Voltage applied at VCC to VSS
-0.3 V to + 4.1 V
Voltage applied to any pin (2)
-0.3 V to (VCC + 0.3 V)
Diode current at any device terminal
-2 mA to +2 mA
Programmed device (3)
Storage temperature, TStg
Electrostatic discharge (ESD) rating
(1)
(2)
(3)
-40°C to 105°C
Human-Body Model (HBM)
2000 V
Charged-Device Model (CDM)
500 V
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 voltages referenced to VSS.
Higher temperature may be applied during board soldering according to the current JEDEC J-STD-020 specification with peak reflow
temperatures not higher than classified on the device label on the shipping boxes or reels.
RECOMMENDED OPERATING CONDITIONS
MIN
VCC
Supply voltage during program execution
DVCC = VCC
VSS
Supply voltage
DVSS = VSS
TA
Operating free-air temperature
2
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TYP
MAX
UNIT
2.8
3.6
V
0.0
0.0
V
-40
85
°C
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ELECTRICAL CHARACTERISTICS
Current Consumption (1)
over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted)
VCC
TYP
UNIT
IPeak
Peak operating Current
PARAMETER
3.3 V
TBD
µA
ITyp
Typical operating current
3.3 V
TBD
µA
(1)
TEST CONDITIONS
All inputs are tied to 0 V or VCC. Outputs do not source or sink any current.
Wireless Charging Communication Accuracy
over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted)
PARAMETER
TEST CONDITIONS
TA
VCC
MIN
TYP
25°C
3V
-1
±0.2
1
%
0°C to 85°C
3V
-2.5
±0.5
2.5
%
0°C to 85°C
3.6 V
TBD
TBD
%
MAX
UNIT
COMM Timing
MAX UNIT
Input Characteristics – RST, TERMINATION_ENABLE, WIRELESS_DISABLE,
COMM_ILIM_DISABLE
PARAMETER
TEST CONDITIONS
VCC
VIT+
Positive-going input threshold voltage
VIT-
Negative-going input threshold voltage
Vhys
Input voltage hysteresis (VIT+ - VIT-)
3V
Ilkg
High-impedance leakage current (1) (2)
3V
RPull
Pullup/pulldown resistor
For pullup: VIN = VSS
For pulldown: VIN = VCC
CI
Input capacitance
VIN = VSS or VCC
(1)
(2)
MIN
TYP
0.45 VCC
0.75 VCC
V
0.25
0.55
V
0.3
20
35
1
V
±50
nA
50
kΩ
5
PRODUCT PREVIEW
over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted)
pF
The leakage current is measured with VSS or VCC applied to the corresponding pin(s), unless otherwise noted.
The leakage of the digital port pins is measured individually. The port pin is selected for input and the pullup/pulldown resistor is
disabled.
Output Characteristics – COMM_DRIVE, BQ25046_EN1, BQ25046_EN2, MIN_LOAD,
BQ25046_OUT_ENABLE
over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted)
PARAMETER
VOH
High-level output voltage
VOL
Low-level output voltage
(1)
(2)
VCC
MIN
I(OHmax) = -1.5 mA (1)
TEST CONDITIONS
3V
VCC - 0.25
TYP
MAX
VCC
I(OHmax) = -6 mA (2)
3V
VCC - 0.6
VCC
I(OLmax) = 1.5 mA (1)
3V
VSS
VSS + 0.25
I(OLmax) = 6 mA (2)
3V
VSS
VSS + 0.6
UNIT
V
V
The maximum total current, I(OHmax) and I(OLmax), for all outputs combined, should not exceed ±12 mA to hold the maximum voltage drop
specified.
The maximum total current, I(OHmax) and I(OLmax), for all outputs combined, should not exceed ±48 mA to hold the maximum voltage drop
specified.
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Typical Characteristics – Outputs
over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted)
TYPICAL LOW-LEVEL OUTPUT CURRENT
vs
LOW-LEVEL OUTPUT VOLTAGE
TYPICAL HIGH-LEVEL OUTPUT CURRENT
vs
HIGH-LEVEL OUTPUT VOLTAGE
0.0
VCC = 3 V
I OH − Typical High-Level Output Current − mA
PRODUCT PREVIEW
I OL − Typical Low-Level Output Current − mA
50.0
TA = 25°C
40.0
TA = 85°C
30.0
20.0
10.0
0.0
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
VCC = 3 V
−10.0
−20.0
−30.0
TA = 85°C
−40.0
TA = 25°C
−50.0
0.0
0.5
VOL − Low-Level Output Voltage − V
Figure 2.
4
1.0
1.5
2.0
2.5
3.0
3.5
VOH − High-Level Output Voltage − V
Figure 3.
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POR/Brownout Reset (BOR) (1)
over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted)
PARAMETER
TEST CONDITIONS
VCC
MIN
TYP
MAX
UNIT
VCC(start)
See Figure 4
dVCC/dt ≤ 3 V/s
0.7 × V(B_IT-)
V(B_IT–)
See Figure 4 through Figure 6
dVCC/dt ≤ 3 V/s
1.35
V
Vhys(B_IT–)
See Figure 4
dVCC/dt ≤ 3 V/s
140
mV
td(BOR)
See Figure 4
2000
µs
t(reset)
Pulse length needed at RST/NMI pin to
accept reset internally
(1)
2.2 V
2
V
µs
The current consumption of the brownout module is already included in the ICC current consumption data. The voltage level V(B_IT–) +
Vhys(B_IT–)is ≤ 1.8 V.
VCC
Vhys(B_IT−)
V(B_IT−)
PRODUCT PREVIEW
VCC(start)
1
0
t d(BOR)
Figure 4. POR/Brownout Reset (BOR) vs Supply Voltage
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Typical Characteristics – POR/Brownout Reset (BOR)
VCC
3V
2
VCC(drop) − V
VCC = 3 V
Typical Conditions
t pw
1.5
1
VCC(drop)
0.5
0
0.001
1
1000
1 ns
t pw − Pulse Width − µs
1 ns
t pw − Pulse Width − µs
Figure 5. VCC(drop) Level With a Square Voltage Drop to Generate a POR/Brownout Signal
VCC
2
t pw
3V
PRODUCT PREVIEW
VCC(drop) − V
VCC = 3 V
1.5
Typical Conditions
1
VCC(drop)
0.5
0
0.001
t f = tr
1
1000
t pw − Pulse Width − µs
tf
tr
t pw − Pulse Width − µs
Figure 6. VCC(drop) Level With a Triangle Voltage Drop to Generate a POR/Brownout Signal
6
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Analog Inputs: VIN_DIV, ISET_SENSE, ADAPTER_DETECT, ISET_SCALE (1) (2)
over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted)
PARAMETER
VCC
TEST CONDITIONS
ADC supply voltage range
(3)
VAx
Analog input voltage range
Rs
Source impedance on input channel
(1)
(2)
(3)
VCC
MIN
VSS = 0 V
3V
TYP
MAX
2.8
3.6
0
VCC
3V
UNIT
V
V
20
kΩ
The leakage current is defined in the leakage current table with the Input Characteristics parameters.
The internal reference current is supplied via terminal VCC.
The analog input voltage range must be within the selected reference voltage range 0 V to 2.5 V for valid conversion results.
10-Bit ADC, Built-In Voltage Reference
over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted)
VCC
MIN
TYP
MAX
VREF+
Positive built-in 2.5-V reference
PARAMETER
TEST CONDITIONS
3V
2.35
2.5
2.85
V
TCREF+
Temperature coefficient (1)
3V
±100
ppm/°C
VREF with calibration data applied –
VIN_DIV and ISET_SCALE
TBD
Calculated using the box method: ((MAX(VREF(T)) × MIN(VREF(T))) / MIN(VREF(T)) / (TMAX – TMIN)
PRODUCT PREVIEW
(1)
UNIT
10-Bit ADC, Linearity Parameters
over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted)
MAX
UNIT
EI
Integral linearity error
PARAMETER
TEST CONDITIONS
VCC
3V
MIN
TYP
±1
LSB
ED
Differential linearity error
3V
±1
LSB
EO
Offset error
Source impedance RS < 100 Ω
3V
±1
LSB
EG
Gain error
Unbuffered external reference, VeREF+ = 2.5 V
3V
±1.1
±2
LSB
ET
Total unadjusted error
Unbuffered external reference, VeREF+ = 2.5 V
3V
±2
±5
LSB
UNIT
MSP430BQ1010 Thresholds
over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted)
PARAMETER
VAC-DET-LO-THRESHOLD
VAC-DET-HI-THRESHOLD
TEST CONDITIONS
VCC = 3 V
VCC = 3 V
VADAPTER-DETECT-THRESHOLD
Large error threshold
MIN
TYP
MAX
0.23
0.24 VCC
0.25 VCC
0.69
0.72
0.75
0.47
0.48 VCC
0.5 VCC
1.41
1.44
1.5
0.5
BQ25046_EN1 = 1, BQ25046_EN2 = 1
5
BQ25046_EN1 = 1, BQ25046_EN2 = 0
20
VOVER-CURRENT-THRESHOLD (1)
V
V
V
%
1.35
V
VISET-SCALE-MIN-LOAD-LO-THRESHOLD
68.36
mV
VISET-SCALE-MIN-LOAD-HI-THRESHOLD
134.27
mV
VISET-SCALE-TERM-LO-THRESHOLD
75.68
mV
VISET-SCALE-TERM-HI-THRESHOLD
144
mV
VISET-SCALE-COMM-ILIM-THRESHOLD
0.98
V
(1)
See the bq25046 datasheet (SLUSA83) for the transimpedance gain.
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NC
DVCC
RESERVED
NC
COMM_ILIM_DISABLE
TERMINATION_ENABLE
BQ25046_OUT_ENABLE
32
31
30
29
28
27
26
25
DVSS
1
24
NC
AC_DETECT
2
23
NC
COMM_DRIVE
3
22
WIRELESS_DISABLE
NC
4
21
RESERVED
RST
5
20
NC
VIN_DIV
6
19
NC
ISET_SENSE
7
18
ISET_SCALE
Reserved
8
17
NC
RTV PACKAGE
9
10
11
12
13
14
15
16
NC
BQ25046_EN1
BQ25046_EN2
NC
NC
NC
MIN_LOAD
(TOP VIEW)
ADAPTER_DETECT
PRODUCT PREVIEW
8
NC
DEVICE INFORMATION
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TERMINAL FUNCTIONS
DVSS
NO.
I/O
1
-
-
Supply voltage (GND connection)
AC_DETECT
DESCRIPTION
2
I
A
Analog input voltage that is used to detect the presence of wireless power
transmission. AC_DETECT is the voltage at the AC2 switching node in the EVM
schematic [see bq25046EVM-687 User’s Guide (SLVU420)]. If the wireless power
transmission is not present during the MSP430BQ1010 power-up routine, the
device is reset.
3
O
D
Communication control. Communicates with the wireless transmitter by varying
the reflected impedance.
NC
4
-
-
Connect to VSS
RST
5
I
D
Device reset
6
I
A
Analog input voltage that represents 6:1 divided rectifier output voltage. See
bq25046EVM-687 User’s Guide (SLVU420) for more details on the 6:1 divider.
7
I
A
Analog input voltage for overcurrent detection. When the ISET_SENSE voltage
exceeds the overcurrent threshold, the MSP430BQ1010 disables the BQ25046
output and sends an end power transfer packet, message 0x05.
8
-
-
Reserved. Connect to VSS.
COMM_DRIVE
VIN_DIV
ISET_SENSE
Reserved (VSS)
ADAPTER_DETECT
9
I
A
External adapter voltage measurement. External adapter refers to another host
charging the battery. Use a 6:1 divider from the adapter voltage. When the
ADAPTER_DETECT voltage exceeds the VADAPTER-DETECT threshold, the
MSP430BQ1010 disables the BQ25046 output and sends an end power transfer
packet, message 0x01.
10
-
-
Connect to VSS
11
O
D
BQ25046 current limit configuration pins. See the EN1 and EN2 Input table in the
BQ25046 datasheet (SLUSA83).
BQ25046_EN2
12
O
D
NC
13
-
-
Connect to VSS
NC
14
-
-
Connect to VSS
NC
15
-
-
Connect to VSS
NC
BQ25046_EN1
MIN_LOAD
NC
16
O
D
Provides additional load during minimum-load conditions to improve the stability of
the wireless control loop. When a minimum-load condition is detected (that is,
when the BQ25046 output current is less than VISET_SCALE_MINLOAD_LO_THRESHOLD) the MIN_LOAD pin is set high. When the output current
exceeds VISET_SCALE_MIN-LOAD_HI_THRESHOLD, the pin is reset.
17
-
-
Connect to VSS
ISET_SCALE
18
I
A
Analog input voltage that represents BQ25046 output current. Connect a 470-Ω
resistor between this pin and ground. This pin can be tied directly to the ISET pin
on the BQ25046 to achieve a output current limit of VOVER_CURRENT_THRESHOLD. If
a lower BQ25046 current limit is desired, a second resistor can be connected from
this pin to the ISET pin on the BQ25046. The transimpedance gain at this pin is
1.31 V/A. See the bq25046EVM-687 User’s Guide (SLVU420) for more details on
choosing values for the BQ25046 ISET resistor.
NC
19
-
-
Connect to VSS
NC
20
-
-
Connect to VSS
Reserved (DVCC)
21
I
D
Reserved. Connect to DVCC.
22
I
D
Connecting this pin to DVCC disables wireless power transfer. When
WIRELESS_DISABLE is pulled to DVCC, the MSP430BQ1010 disables the
BQ25046 output and sends an end power transfer packet, message 0x03.
NC
23
-
-
Connect to VSS
NC
24
-
-
Connect to VSS
D
Enables the wireless charging path. The wireless charging output is combined by
a logical OR with the ADAPTER_DETECT function. During the MSP430BQ1010
power-up routine, this pin is set high to enable the BQ25046 output, only if no
external adapter is detected.
WIRELESS_DISABLE
BQ25046_OUT_ENABLE
25
O
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PRODUCT PREVIEW
NAME
TYPE
(A/D)
MSP430BQ1010
SLAS696 – DECEMBER 2010
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TERMINAL FUNCTIONS (continued)
NAME
NO.
I/O
TYPE
(A/D)
DESCRIPTION
D
User configurable pin that enables the power-supply termination feature on the
MSP430BQ1010. Pulling this pin high enables the termination detect function on
MSP430BQ1010 which sends an end power transfer packet, message 0x01, to
the transmitter 5 seconds or 3 minutes after the BQ25046 output current has
dropped below VISET_SCALE_TERM_LO_THRESHOLD or VISET_SCALE_TERM_HI_THRESHOLD
thresholds respectively.
TERMINATION_ENABLE
26
I
COMM_ILIM_DISABLE
27
I
D
User configurable pin that is used to enable/disable BQ25046 current limit modes
during communication. With COMM_ILIM_DISABLE connected to DVSS, current
limit during communication is enabled, and with COMM_ILIM_DISABLE
connected to DVCC, current limit during communication is disabled.
NC
28
-
-
Connect to VSS
Reserved (VSS/floating)
29
-
-
Reserved. Can be either connected to VSS or left floating
DVCC
30
-
-
Supply voltage (VCC)
NC
31
-
-
Connect to VSS
NC
32
-
-
Connect to VSS
-
-
-
Connection to DVSS is recommended.
QFN Pad
PRODUCT PREVIEW
10
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Block Diagram
AC_DETECT
Software
Reset
VCC/4
VCC/2
MIN_LOAD
Min_Load
Detect
COMM_ILIM_
DISABLE
ISET_
SCALE
A/D
COMM_DRIVE
Control Error
and Power
Packet
Calculation
A/D
Term
Detect
Comm and
BQ25046 BQ25046_EN1
EN1/EN2
Control BQ25046_EN2
PRODUCT PREVIEW
VIN_DIV
5-s
Delay
180-s
Delay
TERM_EN
ISET_SNS
A/D
OverCurrent
Detect
EPT
WIRELESS_DISABLE
ADAPTER_
IN_DIV
A/D
Adapter
Detect
BQ25046_OUT_EN
Figure 7. Simplified Functional Block Diagram
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DETAILED FUNCTIONAL DESCRIPTION
The MSP430BQ1010 operation can be classified into two main routines: power-up routine and main loop routine.
On power-up, the MSP430BQ1010 executes the power-up routine, which enables the AC Detect, initial Adapter
Detect check, and transmits signal strength, ID, and configuration packets to the transmitter (in the same
sequence). Table 1 shows packet information for each of the power-up routine packets.
Table 1. Power-Up Routine Packets
HEADER
PACKET TYPE
MSG SIZE
MESSAGE
0x01
Signal Strength
1
Byte0
Unsigned byte representation of the voltage measured at the VIN_DIV pin
0x71
Identification
7
Byte0
Major Version and Minor Version (0x10)
Byte1
Byte2
Byte3
Manufacturer Code (0x0010)
Byte4
Byte5
0x51
Configuration
5
Byte6
Unique Device ID
Byte0
Power Class and Max Power (0x0A)
Byte1
PRODUCT PREVIEW
Byte2
Byte3
Byte4
Reserved (0x0)
Once the power-up routine is completed, the device enters the main loop routine. In the main loop routine, the
analog inputs are sampled every 32 ms and the control error packet is transmitted every 32 ms or 250 ms,
depending on whether the error calculated was a large error or a small error, respectively. Control error is the
percentage difference between the desired and actual rectifier output voltage that is sent to the transmitter by the
receiver to adjust the transmitter coil current.
Along with the control error packet, a power packet (see Table 2) that represents the received power or the
actual power is sent to the transmitter every 4 seconds during the main loop routine. The control error and the
actual power messages are calculated by the Control Error Packet and Power Packet generator block.
Table 2. Power Packet Contents
HEADER
PACKET TYPE
MSG SIZE
MESSAGE
0x03
Control Error
1
Byte0
Signed byte representation of the percentage difference between the desired
and actual rectifier output voltage (measured at VIN_DIV).
0x04
Received Power
1
Byte0
Unsigned byte representation of percentage received power with respect to 5
W = (VIN_DIV × ISET_SCALE) × 100 / 5 W
During the main loop routine, various protection features such as minimum load detect, overcurrent detect,
wireless disable, and termination detect are enabled. Appropriate actions are taken when any one of these
conditions is detected.
AC Detect
This block detects the presence of a wireless power signal during the power-up routine of MSP430BQ1010. This
feature is always enabled during the power-up routine. On device power-up, if the voltage at AC_DETECT pin is
less than VAC-DET-HI-THRESHOLD, the device waits until this voltage rises above VAC-DET-HI-THRESHOLD to proceed with
the rest of the power-up routine. If the voltage at AC_DETECT pin later falls below VAC-DET-LO-THRESHOLD during
the power-up routine, the device is reset and the execution goes back to comparing the voltage at AC_DETECT
pin against VAC-DET-HI-THRESHOLD.
12
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SLAS696 – DECEMBER 2010
Adapter Detect
This block detects if there is an external adapter present in the system and turns off the wireless power. The
external adapter voltage should be connected to the ADAPTER_DETECT pin through a 6:1 resistor divider.
When voltage at ADAPTER DETECT pin exceeds VADAPTER-DETECT-THRESHOLD, an external adapter in the system
is detected and an end power packet (message 0x01) is sent to the transmitter. This causes the transmitter to
turn off the wireless power. The adapter detect feature is enabled initially in the power-up routine where the
BQ25046_OUT_ENABLE pin is set if no external adapter is detected. This feature is always enabled in the main
loop routine.
Minimum Load Detect
This block detects if the BQ25046 current (measured at ISET_SCALE) drops below a certain threshold and turns
on the additional load in the system, required to maintain stability in the system, by setting the MIN_LOAD pin
high. Hysteresis is implemented by setting MIN_LOAD high when voltage at ISET_SCALE drops below VISETSCALE-MIN-LOAD-LO-THRESHOLD and setting MIN_LOAD low only when voltage at ISET_SCALE rises above VISETSCALE-MIN-LOAD-HI-THRESHOLD. The Min Load Detect feature is enabled after the power-up routine.
This block is enabled in the main loop routine only if the TERMINATION_ENABLE pin is externally pulled high (to
DVCC). The termination condition is detected if the BQ25046 output current, measured at ISET_SCALE pin,
drops below either VISET_SCALE_TERM_HI_THRESHOLD or VISET_SCALE_TERM_LO_THRESHOLD threshold. On detecting a valid
termination condition, an end power transfer packet (message 0x01) is sent to the transmitter either after 3
minutes or 5 seconds, depending on if the voltage at ISET_SCALE dropped below VISET_SCALE_TERM_HI_THRESHOLD
or VISET_SCALE_TERM_LO_THRESHOLD threshold, respectively.
Overcurrent Detect
This block detects an overcurrent condition when the analog voltage at ISET_SENSE (with a 470-Ω resistor
connected between this pin and ground), which represents the BQ25046 output current, exceeds the
VOVER_CURRENT_THRESHOLD. If a lower BQ25046 current limit is desired, a second resistor can be connected from
this pin to the ISET pin on the BQ25046. The transimpedance gain at this pin is 1.31 V/A. On detecting an
overcurrent condition, an end power transfer packet (message 0x05) is sent to the transmitter, and the
transmitter turns off the wireless power. This feature is always enabled in the main loop routine.
Wireless Disable
This block is always enabled in the main loop routine. On externally pulling the WIRELESS_DISABLE input pin
high (to DVCC), an end power transfer packet (message 0x03) is sent to the transmitter, and the transmitter
turns off the wireless power.
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13
PRODUCT PREVIEW
Termination Detect
MSP430BQ1010
SLAS696 – DECEMBER 2010
www.ti.com
EPT Generator
This block generates end power transfer packets with appropriate messages that are sent to the transmitter.
Table 3 shows packet information for the end power transfer packet.
Table 3. EPT Packet
HEADER
0x02
PACKET TYPE
MSG SIZE
End power transfer
1
MESSAGE
Byte0
See Table 4
On receiving the end power transfer packet, the transmitter removes the power signal within tterminate ms. Table 4
shows the various error messages sent during different conditions.
Table 4. EPT Error Messages
EPT CONDITION
EPT MESSAGE
Overcurrent detect
0x05
Adapter detect
0x01
Termination detect
0x01
Wireless disable
0x03
PRODUCT PREVIEW
NOTE
End power transfer can be the first packet that is sent to the transmitter if an external
adapter is detected during the power-up routine.
Control Error Packet and Power Packet Generator
This block computes the control error and actual power for the control error packet and power packet messages
respectively. The control error is calculated as a percentage difference between the rectifier voltage measured at
VIN_DIV and the target or desired rectifier voltage (see Equation 1).
ControlError = 100 ×
Vdesired – Vrect
Vdesired
(1)
Where,
Vrect is the rectifier voltage that is measured VIN_DIV input pin.
Vdesired is the desired rectifier voltage that is dynamically selected depending on the BQ25046 output current
that is measured at the ISET_SCALE input pin.
The control error packet is transmitted every 32 ms or 250 ms depending on if the control error calculated was a
large error or a small error, respectively. Control error is identified as a large error if the percentage difference is
greater than 5% when the BQ25046 charge is not enabled (that is, BQ25046_EN1 = 1 BQ25046_EN2 = 1) or
greater than 20% when the BQ25046 charge is enabled (that is, BQ25046_EN1 = 1 BQ25046_EN2 = 0). The
maximum control error percentage is saturated to ±30%.
The actual power is calculated as a percentage relative to 5 W (see Equation 2). The maximum power that can
be sent is 100%.
Actual Power = 100 ×
Vrect × IOUT
%
5W
(2)
Where,
Vrect is the rectifier voltage that is measured VIN_DIV input pin.
IOUT is the BQ25046 current output that is measured at the ISET_SCALE pin.
14
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MSP430BQ1010
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SLAS696 – DECEMBER 2010
COMM and BQ25046 Current Mode Controller
This block receives the control error, actual power, and end power transfer packets from the control error packet
and power packet generator block and from the EPT generator block. It performs the WPC-compliant bit, byte,
and packet encoding that is required to transmit the packet information over the COMM_DRIVE pin. This block
also controls the BQ25046 current modes via the BQ25046_EN1 and BQ25046_EN2 pins.
During the power-up routine, the BQ25046_EN1 and BQ25046_EN2 pins are set high and the BQ25046 is
turned off. In the main loop routine, the BQ25046 is turned on only when a large negative control error (that is,
the control error greater than -5% with BQ25046_EN1= BQ25046_EN2 =1) is detected for four consecutive
iterations or a small control error (that is, the control error is less than ±5%) is detected the first time. Depending
on the status of the user-configurable COMM_ILIM_DISABLE pin, the current limit of the BQ25046 is enabled or
disabled during communication. See the BQ25046 Current Limit During Communication section for more details
regarding the COMM_ILIM_DISABLE pin and enabling current limit on BQ25046 during communication.
BQ25046 Current Limit During Communication
This feature enables or disables the current limit on the BQ25046 during communication via the
COMM_ILIM_DISABLE pin.
With COMM_ILIM_DISABLE pin externally pulled low (to VSS), the current limit on BQ25046 is enabled during
communication. Depending on if the BQ25046 output current, measured at ISET_SCALE, is greater than or less
than VISET-SCALE-COMM-ILIM-THRESHOLD, the 500-mA (BQ25046_EN1 = 0 and BQ25046_EN2 =1 ) or 100-mA
(BQ25046_EN1 = 0 and BQ25046_EN2 = 0) current limit modes of BQ25046 are selected, respectively. With the
COMM_ILIM_DISABLE pin pulled low, the current limit mode of the BQ25046 is selected only during
communication; once the communication is complete, the BQ25046 is configured in the ISET mode with
BQ25046_EN1 = 1 and BQ25046_EN2 =0.
This feature is enabled only when the BQ25046 is turned ON.
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15
PRODUCT PREVIEW
With the COMM_ILIM_DISABLE pin externally pulled high (to DVCC), the current limit on the BQ25046 during
communication is disabled; that is, the MSP430BQ1010 does not change the BQ25046 current mode during
communication.
MSP430BQ1010
SLAS696 – DECEMBER 2010
www.ti.com
APPLICATION INFORMATION
General Overview of a Wireless Power System
Figure 8 shows a block diagram of a wireless power system, which consists of a transmitter and receiver. The
transmitter consists of an ac-dc power stage, followed by a transmitter coil driver, coil voltage, and coil current
sensing block, and a wireless power controller (BQ500110). The receiver consists of a receiver coil, rectifier,
BQ25046 voltage regulation circuit, and MSP430BQ1010 wireless power controller. The output of the system is
the BQ25046 5-V regulated output voltage that is used as a power supply to the charger in a cellular phone or
other mobile device.
The system shown in Figure 8 implements wireless power transfer via inductive coupling between the transmitter
and receiver. In this system, the transmitter drives a transmit coil with a frequency between 100 and 200 kHz,
and the receiver coil, which is in close proximity to the transmitter coil, rectifies the received voltage to power the
BQ25046. In addition, the receiver continuously monitors its operating point (coil voltage and coil current) and
communicates correction packets to the transmitter via backscatter modulation.
Power
AC to DC
Drivers
Rectification
Voltage
Conditioning
Communication
PRODUCT PREVIEW
Controller
V/I
Sense
Load
(Battery or Phone)
bq2504x
Controller
MSP430
bq50k
Transmitter
Receiver
Figure 8. Wireless Power System
Using MSP430BQ1010 in a Wireless Power System
Figure 9 shows the MSP430BQ1010 used in a wireless power receiver solution. In this application, a receiver coil
connects to a half-synchronous rectifier that includes a rectifier filter capacitor. The rectifier voltage is connected
directly to the IN pin of the BQ25046, and the BQ25046 generates a 3.3-V LDO output that is used to power the
MSP430BQ1010 wireless power supply controller. The MSP430BQ1010 monitors the rectifier voltage and output
current and communicates to the transmitter via the communication modulator to optimize the power delivered to
a mobile device. The OUT pin of the BQ25046 delivers 5-V to a mobile device at power levels up to 5 W.
16
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MSP430BQ1010
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Resonant
RX
Coil Capacitors
SLAS696 – DECEMBER 2010
Discrete Rectifier
IN
20 pF
5-V Output
OUT
ISET
EN1
VDD13
EN2
BQ25046
ISET_SCALE
EN1
VIN_DIV
EN2
COMM
DISABLE_
COMM_ILIM
HI
LO
PRODUCT PREVIEW
MSP430BQ1010
Communication
Modulator
Figure 9. MSP430BQ1010 in a Wireless Power Receiver
Selection of Components
See the bq25046EVM-687 User’s Guide (SLVU420) for suggested component values.
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Product Folder Link(s): MSP430BQ1010
17
PACKAGE OPTION ADDENDUM
www.ti.com
28-Oct-2014
PACKAGING INFORMATION
Orderable Device
Status
(1)
Package Type Package Pins Package
Drawing
Qty
Eco Plan
Lead/Ball Finish
MSL Peak Temp
(2)
(6)
(3)
Op Temp (°C)
Device Marking
(4/5)
MSP430BQ1010IRHBT
OBSOLETE
VQFN
RHB
32
TBD
Call TI
Call TI
-40 to 85
MSP430BQ1010IRTVR
ACTIVE
WQFN
RTV
32
3000
Green (RoHS
& no Sb/Br)
CU NIPDAU
Level-2-260C-1 YEAR
-40 to 85
M430BQ
1010
MSP430BQ1010IRTVT
ACTIVE
WQFN
RTV
32
250
Green (RoHS
& no Sb/Br)
CU NIPDAU
Level-2-260C-1 YEAR
-40 to 85
M430BQ
1010
(1)
The marketing status values are defined as follows:
ACTIVE: Product device recommended for new designs.
LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect.
NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design.
PREVIEW: Device has been announced but is not in production. Samples may or may not be available.
OBSOLETE: TI has discontinued the production of the device.
(2)
Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), or Green (RoHS & no Sb/Br) - please check http://www.ti.com/productcontent for the latest availability
information and additional product content details.
TBD: The Pb-Free/Green conversion plan has not been defined.
Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements for all 6 substances, including the requirement that
lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes.
Pb-Free (RoHS Exempt): This component has a RoHS exemption for either 1) lead-based flip-chip solder bumps used between the die and package, or 2) lead-based die adhesive used between
the die and leadframe. The component is otherwise considered Pb-Free (RoHS compatible) as defined above.
Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame retardants (Br or Sb do not exceed 0.1% by weight
in homogeneous material)
(3)
MSL, Peak Temp. - The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature.
(4)
There may be additional marking, which relates to the logo, the lot trace code information, or the environmental category on the device.
(5)
Multiple Device Markings will be inside parentheses. Only one Device Marking contained in parentheses and separated by a "~" will appear on a device. If a line is indented then it is a continuation
of the previous line and the two combined represent the entire Device Marking for that device.
(6)
Lead/Ball Finish - Orderable Devices may have multiple material finish options. Finish options are separated by a vertical ruled line. Lead/Ball Finish values may wrap to two lines if the finish
value exceeds the maximum column width.
Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. TI bases its knowledge and belief on information
provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and
Addendum-Page 1
Samples
PACKAGE OPTION ADDENDUM
www.ti.com
28-Oct-2014
continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals.
TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release.
In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI to Customer on an annual basis.
Addendum-Page 2
PACKAGE MATERIALS INFORMATION
www.ti.com
26-Jan-2013
TAPE AND REEL INFORMATION
*All dimensions are nominal
Device
Package Package Pins
Type Drawing
SPQ
Reel
Reel
A0
Diameter Width (mm)
(mm) W1 (mm)
B0
(mm)
K0
(mm)
P1
(mm)
W
Pin1
(mm) Quadrant
MSP430BQ1010IRTVR
WQFN
RTV
32
3000
330.0
12.4
5.3
5.3
1.5
8.0
12.0
Q2
MSP430BQ1010IRTVT
WQFN
RTV
32
250
180.0
12.4
5.3
5.3
1.5
8.0
12.0
Q2
Pack Materials-Page 1
PACKAGE MATERIALS INFORMATION
www.ti.com
26-Jan-2013
*All dimensions are nominal
Device
Package Type
Package Drawing
Pins
SPQ
Length (mm)
Width (mm)
Height (mm)
MSP430BQ1010IRTVR
WQFN
RTV
32
3000
367.0
367.0
35.0
MSP430BQ1010IRTVT
WQFN
RTV
32
250
210.0
185.0
35.0
Pack Materials-Page 2
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