Wireless Power Receiver for
Low Power Applications
P9222-
R/RN
Datasheet
© 2019-2022 Renesas Electronics Corpor ation
1
May 5, 2022
The P9222-R/RN is an integrated single-chip wireless power
receiver IC (Rx) for up to 5W applications implementing in-band,
bi-directional data communication with no additional circuitry. The
device receives an AC power signal from a wireless power
transmitter, such as the P9235A-RB WPC Qi BPP Wireless
Transmitter IC, and converts it to a rectified output voltage, which
can be used to power devices or supply the battery charger input
in a wide range of wireless power applications. The receiver (Rx)
integrates a high-efficiency synchronous full bridge rectifie r (SFBR)
and control circuits that enable bi-directional communication from
and to the transmitter (Tx) for optimized power delivery.
The P9222-R/RN is highly efficient at light loads and very well-
suited for low-power applications such as earbuds case charging.
A unique Ping detect feature gives the user an early indication of
the wireless charger connection and improves thermal
performance at the end of complete battery charging. Low under-
voltage lockout (UVLO) threshold allows the receiver to start up
even with a weaker digital ping strength signal from a transmitter
over an extended area.
The device includes over-temperature and under/over-voltage
protection. The internal over-vol tage clamping protects th e rectif ier
output from rising above th e ov ervoltage level when the receiv er i s
quickly moved from a low-coupling position to a high-coupling
position. The integrated 32-bit ARM
®
Cortex
®
-M0 processor
(trademark of ARM, Ltd.) offers a high level of programmability and
design parameters that can be easily configured through the I
2
C
interface or an external EEPROM.
The P9222-R default firmware factory program med in internal OTP
is WPC 1.2.4 Qi Baseline Power Profile (BPP) compatible. The
P9222-RN default factory firmware programmed in internal OTP is
latest WPC 1.3 Qi Baseline Power Profile (BPP) compatible.
The P9222-R/RN is available in a RoHS ultra-small WLCSP-40
package and it is rated for a 0 to 85°C ambient operating
temperature range.
Typical Applications
Wireless power solutions for mobile solutions including:
Wireless earbuds case charging
Wearables and fitness trackers
Mobile devices
Hearing aids case charging
Features
Ultra-compact, efficient wireless power receiver for up to
5W applications
P9222-R default firmware is WPC 1.2.4 Qi Baseline Power
Profile (BPP) compatible
P9222-RN default firmware is WPC 1.3 Qi Baseline Power
Profile (BPP) compatible
Ping detection for reduced power consumption at end of
charging
Low under-voltage lockout (UVLO) for low voltage start-up for
faster connections over an extended area
ASK and FSK modulation/demodulation for Bi-directional
Communication: Rx-to-Tx and Tx-to-Rx
Supports bi-directional data communication
Easy configuration of design parameters through I
2
C interface
on an external EEPROM
Embedded 32-bit ARM
®
Cortex
®
-M0 processor
Internal over-voltage clamping
Low standby and operating mode power consumption
High performance low dropout (LDO) regulator with low
RDS(on) and programmable current limiting
Supports I
2
C slave/master mode
40-WLCSP: 5 × 8 ball array, 2.28 × 3.38 mm, 0.4mm pitch
Block Diagram
Figure 1. Simplified Block Diagram
AC1
AC2
BST2
CM2
CM1
BST1
PGND
VRECT
LDO5P0
VOUT
OD1
OD0
/EN
GP0
GP1
GP2
P9222-R
P9222-RN
LDO1P8
DC Output
OD2
Rx
Coil
LDO1P8
PDET_RC
PDETB
LDO5P0
SCL
SDA
CS
CD
/Enable
/INT
ADC_IN
CMB
CMA
EEPROM or AP
(Optional)
External Thermistor
Connect to LDO1P8
for External EEPROM
ADC_IN
P9222-R/RN
Datasheet
© 2019-2022 Renesas Electronics Corpor ation
2
May 5, 2022
Figure 2. P9222-R/RN Block and Application Diagram
L
RX
C
CM1
CM1
AC1
AC2
CMA
C
CMA
Communication
Drivers
Synchronous
Rectifier Control
Logic
LDO Driver
&
Control
A R M M0
Microprocessor
OD0
OD1
GP1
GP2
Output
Output
Current
Sense
C
OUTPUT
GPOD
Interface
12 Bit
ADC
PGND
ADC
MUX
Analog to Digital Interface
IOUTSNS
IOUTSNS
Internal
Temperature
Sense
1.8V GPIO Interface
VRECT
/EN
/INT
Timers &
Counters
16 k B OT P
2k B RAM
Frequency
Detector
An al og C or e:
Bias
OSC
LDO 1.8V
LDO 5V
Char ge Pumps
LDO1P8
C
LDO1P8
C
BST1
BST1
BST2
C
BST2
GP0
C
CM2
C
CMB
CM2
CMB
VRECT
VOUT
OVP Pr otection
LDO5P0
C
LDO5P0
SCL
SDA
OD2
/EN
PGND
I2C
Interface
PDETB
PDET_RC
C
PDET_C
R
PDET_R
Ping
Detection
Circuitry
/INT
C
VRECT
C
S
C
D
GPIO0
OD2