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Integrated Device Technology Electronic Components Datasheet

P9242-R Datasheet

Wireless Power Transmitter

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Wireless Power Transmitter
for 15W Applications
P9242-R
Datasheet
Description
The P9242-R is a highly integrated, magnetic induction, wireless
power transmitter supporting up to 15W. The system-on-chip
operates with an input voltage range of 4.25V to 21V.
The transmitter includes an industry-leading 32-bit ARM® Cortex®-
M0 processor offering a high level of programmability while
consuming extremely low standby power. The P9242-R features
two LED outputs with pre-defined user-programmable blinking
patterns, buzzer, and programmable over-current protection
supporting a wide range of applications. The I2C serial
communication allows the user to read information such as voltage,
current, frequency, and fault conditions. The P9242-R includes an
under-voltage lockout and thermal management circuit to safe
guard the device under fault conditions. Together with the P9221-
R receiver (RX), the P9242-R is a complete wireless power system
solution.
The P9242-R is available in a lead-free, space-saving 48-VFQFN
package. The product is rated for a -40ºC to +85ºC operating
temperature range.
Typical Applications
Charging pad
Accessories
Cradle
Tablets
Features
Power transfer up to 15W
Wide input voltage range: 4.25V to 21V
WPC-1.2 compliant, MP-A2 coil configuration
Integrated step-down switching regulator
Embedded 32-bit ARM® Cortex®-M0 processor
Integrated drivers for external power FETs
Simultaneous voltage and current demodulation scheme for
communication
Integrated current sense amplifier
Low standby power
Dedicated remote temperature sensing
Programmable current limit
Power transfer LED indicator
User programmable foreign objects detection (FOD)
Pre-defined user-programmable LED pattern
Active-LOW enable pin for electrical on/off
Over-current and over-temperature protection
Supports I2C interface
-40 to +85°C ambient operating temperature range
48-VFQFN (6 6 mm) RoHS-compliant package
Basic Application Circuit
RSNS
12V
L
SW_S
VIN_LDO
LDO33
LDO18
PREG
Programming
resistors
ILIM/FOD
LED/Q-fact
P9242-R
GH_BRG1
SW_BRG1
GL_BRG1
GH_BRG2
SW_BRG2
GL_BRG2
Peak
detector
CP
LP
© 2018 Integrated Device Technology, Inc
1
January 16, 2018


Integrated Device Technology Electronic Components Datasheet

P9242-R Datasheet

Wireless Power Transmitter

No Preview Available !

P9242-R Datasheet
Contents
1. Pin Assignments...........................................................................................................................................................................................5
2. Pin Descriptions............................................................................................................................................................................................6
3. Absolute Maximum Ratings..........................................................................................................................................................................8
4. Electrical Characteristics ..............................................................................................................................................................................9
5. Typical Performance Characteristics..........................................................................................................................................................11
6. Function Block Diagram .............................................................................................................................................................................13
7. Theory of Operation....................................................................................................................................................................................14
7.1 Foreign Object Detection...................................................................................................................................................................14
7.2 Configuring Foreign Object Detection and Over-Current Limit ILIM/FOD Pin ................................................................................14
7.3 Enable Pin – EN ................................................................................................................................................................................16
7.4 Buzzer BUZR Pin ...........................................................................................................................................................................16
7.5 Voltage Demodulation VDEM1 Pin.................................................................................................................................................16
7.6 Current Demodulation IDEMI .........................................................................................................................................................16
7.7 Thermal Protection ............................................................................................................................................................................17
7.8 External Temperature Sensing TS .................................................................................................................................................17
7.9 Q-Factor and LED Pattern Selection LED/Q-Fact Pin ....................................................................................................................18
7.10 Input Voltage Requirement................................................................................................................................................................19
7.11 Integrated Step-Down Regulator .......................................................................................................................................................19
7.12 Integrated Linear Regulators PREG, LDO33, and LDO18 .............................................................................................................19
7.13 Under-Voltage Lock-Out (UVLO) Protection......................................................................................................................................19
7.14 LC Resonant Circuit ..........................................................................................................................................................................20
8. Wireless Communication Interface.............................................................................................................................................................21
8.1 Modulation/Communication ...............................................................................................................................................................21
8.2 Bit Decoding Scheme for ASK...........................................................................................................................................................22
8.3 Byte Decoding for ASK......................................................................................................................................................................22
8.4 Packet Structure ................................................................................................................................................................................22
9. WPC Mode Characteristics ........................................................................................................................................................................23
9.1 Selection Phase.................................................................................................................................................................................23
9.2 Ping Phase (Digital Ping)...................................................................................................................................................................23
9.3 Identification and Configuration Phase..............................................................................................................................................24
9.4 Negotiation Phase .............................................................................................................................................................................24
9.5 Calibration Phase ..............................................................................................................................................................................24
9.6 Power Transfer Phase.......................................................................................................................................................................24
10. Functional Registers...................................................................................................................................................................................25
10.1 I2C Interface ......................................................................................................................................................................................25
10.2 Register Addresses and Definitions ..................................................................................................................................................26
11. Application Information ...............................................................................................................................................................................29
11.1 Power Dissipation and Thermal Requirements .................................................................................................................................29
© 2018 Integrated Device Technology, Inc
2
January 16, 2018


Part Number P9242-R
Description Wireless Power Transmitter
Maker IDT
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P9242-R Datasheet PDF






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