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Integrated Device Technology Electronic Components Datasheet

P9241-G Datasheet

Wireless Power Transmitter

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Wireless Power Transmitter for Smartphones
with Fast Charging Modes for 5W, 7.5W, and 10W
Applications
P9241-G
Datasheet
Description
The P9241-G is a highly integrated, magnetic induction, wireless
power transmitter that supports Baseline Power Profile (BPP),
7.5W wireless charging for iPhone mode, and 10W wireless
charging for Android proprietary modes. The external step down
regulator in the front end of P9241-G design enables wide input
voltage range of 5V to 19V.
The P9241-G transmitter IC integrates an industry-leading 32-bit
ARM® Cortex®-M0 processor, offering a high level of program-
mability and extremely low standby power consumption. Integrated
current sense amplifier, full bridge MOSFET drivers, and bias
regulators reduces the component count of the solution and
differentiates the P9241-G from the competition.
The P9241-G transmitter generates power through the power coil,
detects the presence of a wireless power receiver, decodes the
communication packets from the receiver, and adjusts the
transmitted power by controlling the voltage based on feedback
from the receiver. The device is specially designed to support A11a
coil configuration and goes into fixed-frequency operation mode to
support 7.5W charging for Apple iPhones. It uses an external
oscillator for very accurate 127.7kHz fixed frequency operation.
The P9241-G features two LED outputs with pre-defined user-
programmable blinking patterns for end-user indication, which
supports a wide range of applications. The transmitter detects if a
foreign metal object is placed on the transmitter pad by measuring
the power loss between the received power and the transmitted
power during the Power Transfer Phase. The I2C serial
communication allows the user to read the transmitter’s basic infor-
mation, such as voltage, current, frequency, and fault conditions.
The P9241-G also features a wide range of system protections,
such as over-current, over-voltage, under-voltage lockout, and
thermal management circuits to safe guard wireless power systems
under fault conditions.
The device is available in a lead-free, space-saving 48-VFQFPN
package. The product is rated for a -40ºC to +85ºC operating
temperature range.
Typical Applications
BPP Wireless Charging Pads
Up to 7.5W charging for iPhones
Up to 10W Android Fast Charging Pads
Cradles
Tablets
After-Market Automotive Wireless
Charging Pads
Clock IC
Features
Supports 7.5W wireless charging for iOS iPhones
Supports 10W wireless charging for Android phones
Fixed frequency operation for iPhones
Wide input voltage range: 5V to 19V
WPC-1.2.4 compatible, A11a coil configuration
EN303417 CE certification compatible
Feedback control for external input step-down regulator
Integrated drivers for external power MOSFETs
Embedded 32-bit ARM® Cortex®-M0 processor (trademark of
ARM, Ltd.)
Voltage and current demodulation scheme for WPC
communication
Integrated current sense amplifier
Low standby power
Dedicated remote temperature sensing
User-programmable power transfer LED indicators
User-programmable foreign objects detection (FOD)
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-VFQFPN (6 6 mm) RoHS-compliant package
Typical Application Circuit
Step-Down
Regulator
RSNS
SW_S
VIN_LDO
LDO33
LDO18
PREG
GPIO_B6
P9241-G
GH_BRG1
SW_BRG1
GL_BRG1
GH_BRG2
SW_BRG2
GL_BRG2
GND
Peak
Detector
CP
LP
© 2019 Integrated Device Technology, Inc.
1
March 8, 2019


Integrated Device Technology Electronic Components Datasheet

P9241-G Datasheet

Wireless Power Transmitter

No Preview Available !

P9241-G 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. Block Diagram ............................................................................................................................................................................................16
7. General Description....................................................................................................................................................................................17
8. WPC Mode Characteristics ........................................................................................................................................................................18
8.1 Selection Phase.................................................................................................................................................................................18
8.2 Ping Phase (Digital Ping)...................................................................................................................................................................18
8.3 Identification and Configuration Phase..............................................................................................................................................19
8.4 Power Transfer Phase.......................................................................................................................................................................19
9. Application Information ...............................................................................................................................................................................20
9.1 Internal Power Supply and Internal Bias............................................................................................................................................20
9.1.1 Integrated Step-Down Regulator ........................................................................................................................................20
9.1.2 Linear Regulators PREG, LDO33, and LDO18 ...............................................................................................................20
9.2 Enable Pin .........................................................................................................................................................................................20
9.3 Software Under-Voltage Lock-Out (UVLO) Protection ......................................................................................................................20
9.4 Die Temperature Protection ..............................................................................................................................................................21
9.5 External Temperature Sensing TS .................................................................................................................................................21
9.6 Full-Bridge Driver...............................................................................................................................................................................21
9.7 LC Resonant Circuits.........................................................................................................................................................................21
9.8 WPC Communication Interface .........................................................................................................................................................22
9.8.1 Modulation/Communication ................................................................................................................................................22
9.8.2 Bit Decoding Scheme for ASK............................................................................................................................................23
9.8.3 ASK Voltage Demodulation VDEM1 Pin..........................................................................................................................23
9.8.4 ASK Current Demodulation IDEMI Pin ............................................................................................................................24
9.9 General Purpose Input/output GPIO Pins ......................................................................................................................................24
9.9.1 Input Port Detection and Receiver Support GPIO_A5, GPIO_A7, and GPIO_B8 ...........................................................24
9.9.2 Foreign Object Detection GPIO_A3 ................................................................................................................................25
9.9.3 Control of External Power Stage DC/DC Buck Regulator GPIO_B4 and GPIO_B7........................................................26
9.9.4 Bypass External DC/DC Buck RegulatorGPIO_A4 .........................................................................................................26
9.9.5 Coil Over-Voltage Control GPIO_A6 ...............................................................................................................................26
9.9.6 External OscillatorGPIO_B5 and GPIO_B6.....................................................................................................................26
9.9.7 LED Pattern Selection GPIO_A3.....................................................................................................................................27
9.9.8 I2C Communication Interface GPIO_A0 and GPIO_A1 ...................................................................................................28
9.9.9 External Memory GPIO_B0, GPIO_B1, GPIO_B2, and GPIO_B3 ..................................................................................29
10. Register Addresses and Definitions ...........................................................................................................................................................29
© 2019 Integrated Device Technology, Inc.
2
March 8, 2019


Part Number P9241-G
Description Wireless Power Transmitter
Maker IDT
Total Page 30 Pages
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