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Renesas Electronics Components Datasheet

P9235A-RB Datasheet

Wireless Power Transmitter

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Wireless Power Transmitter for up
to 5W Applications
P9235A-RB
Datasheet
Description
The P9235A-RB is a highly integrated, magnetic induction, wireless
power transmitter supporting up to 5W of total wireless system
power. The P9235A-RB offers a pre-programmed bootloader that
must be used in conjunction with an external flash memory that
contains control firmware. This architecture gives the user the
flexibility to change the firmware in the external flash to meet
application-specific requirements. IDT also provides firmware to
implement standard WPC coil configurations, such as the A11a
addendum.
The P9235A-RB includes an industry-leading 32-bit ARM®
Cortex®-M0 processor offering a high level of programmability
while consuming extremely low standby power. The transmitter
features two open-drain LED outputs with pre-defined blinking
patterns and five general-purpose input/output (GPIO) pins. The
GPIOs can be firmware-defined for functions such as setting the
current limit, setting FOD limits, driving additional coils, or sounding
a buzzer, which supports a wide range of applications. The I2C
serial communication allows the user to read information such as
voltage, current, frequency, and fault conditions.
The P9235A-RB includes an under-voltage lockout and thermal
management circuit to safeguard the device under fault conditions.
Together with the P9225-R receiver (RX), the P9235A-RB forms a
complete 5W wireless power system solution.
The P9235A-RB is available in a Pb-free, space-saving 5 5 mm
40-QFN package. The product is rated over an operating
temperature range of -40ºC to +85ºC.
Application Diagram
L
Ext.
Memory
Flash1
SW_S
VIN_LDO
LDO33
LDO18
PREG
SS
SCLK
M ISO
MOSI
SCL
SDA
RSNS
GH_BRG1
SW_BRG1
GL_BRG1
P9235A-RB
GH_BRG2
SW_BRG2
GL_BRG2
GND
Features
Power transfer up to 5W
Wide input voltage range: 4.25V to 21V
WPC compatible
Integrated step-down switching regulator
Embedded 32-bit ARM® Cortex®-M0 processor (trademark of
ARM, Ltd.)
Integrated drivers for external power FETs
Simultaneous voltage and current demodulation scheme for
robust communication
Integrated current sense amplifier
Low standby power
Dedicated remote temperature sensing
Two LED outputs that can indicate power transfer and fault
conditions
Foreign object detection (FOD)
Active-low enable pin for electrical on/off
Over-current and over-temperature protection
Supports I2C interface
SPI interface to access external flash memory
-40 to +85°C ambient operating temperature range
40-QFN (5 5 mm) RoHS-compliant package
Typical Applications
Smart Watches
Headsets
Health and Fitness Monitors
Portable Medical Applications
Peak
Detector
CP
LP
Note:
1. External memory is required for the P9235A-RB.
© 2019 Integrated Device Technology, Inc.
1
March 8, 2019


Renesas Electronics Components Datasheet

P9235A-RB Datasheet

Wireless Power Transmitter

No Preview Available !

P9235A-RB Datasheet
Contents
1. Pin Assignments...........................................................................................................................................................................................4
2. Pin Descriptions............................................................................................................................................................................................5
3. Absolute Maximum Ratings..........................................................................................................................................................................7
4. Thermal Characteristics................................................................................................................................................................................7
5. Electrical Characteristics ..............................................................................................................................................................................8
6. Typical Performance Characteristics..........................................................................................................................................................10
7. Block Diagram ............................................................................................................................................................................................11
8. Theory of Operation....................................................................................................................................................................................12
8.1 Foreign Object Detection .................................................................................................................................................................12
8.2 Input Voltage ....................................................................................................................................................................................12
8.3 General Purpose Input/Output GPIO Pins ....................................................................................................................................12
8.4 Enable Pin........................................................................................................................................................................................12
8.5 Voltage Demodulation VDEM .......................................................................................................................................................13
8.6 Current Demodulation IDEM Pin...................................................................................................................................................13
8.7 External Memory ..............................................................................................................................................................................13
8.8 Thermal Protection...........................................................................................................................................................................14
8.9 Integrated Step-Down Regulator......................................................................................................................................................14
8.10 Linear Regulators PREG, LDO33, and LDO18 Pins .....................................................................................................................14
8.11 Under-Voltage Lock-Out (UVLO) Protection ....................................................................................................................................14
8.12 LC Resonant Circuit .........................................................................................................................................................................15
9. Communication Interface............................................................................................................................................................................16
9.1 Modulation/Communication..............................................................................................................................................................16
9.2 Bit Decoding Scheme for ASK .........................................................................................................................................................17
9.3 Byte Decoding for ASK ....................................................................................................................................................................17
9.4 Packet Structure ..............................................................................................................................................................................17
10. I2C Interface ...............................................................................................................................................................................................18
11. Power Dissipation and Thermal Requirements ..........................................................................................................................................19
12. Package Outline Drawings .........................................................................................................................................................................20
13. QFN Package Assembly ............................................................................................................................................................................20
14. Marking Diagram ........................................................................................................................................................................................20
15. Ordering Information...................................................................................................................................................................................20
16. Revision History..........................................................................................................................................................................................21
© 2019 Integrated Device Technology, Inc.
2
March 8, 2019



Part Number P9235A-RB
Description Wireless Power Transmitter
Maker Renesas
Total Page 3 Pages
PDF Download

P9235A-RB Datasheet PDF





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