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 rectifier (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 wellsuited 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 undervoltage 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-voltage clamping protects the rectifier
output from rising above the overvoltage level when the receiver is
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 I2C
interface or an external EEPROM.
The P9222-R default firmware factory programmed 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.

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 I2C 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 I2C slave/master mode
 40-WLCSP: 5 × 8 ball array, 2.28 × 3.38 mm, 0.4mm pitch