Renesas P9221-RAHGI8

Overview

P9221-RAHGI8 from Integrated Device Technology (IDT) is a Qi-compliant wireless power receiver IC for 15W magnetic inductive charging systems, integrating a synchronous rectifier, ultra-low-dropout LDO regulator, and ARM® Cortex®-M0 microcontroller. It delivers programmable 9V or 12V DC output with 87% peak DC-to-DC efficiency when paired with the P9242-R transmitter, supporting battery-powered mobile phones and tablets.

For engineers reviewing the P9221-RAHGI8 datasheet, P9221-RAHGI8 pinout, P9221-RAHGI8 application, or P9221-RAHGI8 equivalent, key selection criteria include WPC-1.2.3 compliance, programmable FOD via RPPO/RPPG pins, I²C interface support, and 52-WLCSP package thermal performance at 0–85°C ambient.

Technical Context

The P9221-RAHGI8 implements full synchronous rectification using low-R_DSON internal switches driven by BST1/BST2 boost circuits, with VRECT dynamically regulated across load conditions. Its embedded 32-bit ARM® Cortex®-M0 enables real-time FOD tuning, alignment sensing via ALIGNX/ALIGNY, and closed-loop power control through ASK-based communication with the transmitter.

It supports dual-mode output voltage selection (9V/12V) via VOSET/Q-Fact resistor divider programming, active-low EN pin for shutdown control, and open-drain INT pin for overvoltage, overcurrent, and die temperature (>140°C) fault reporting - all coordinated through firmware-managed status registers and interrupt enable logic.

Key Specifications

Pinout & Package

52-WLCSP (AHG52) package with 0.4 mm pitch, optimized for compact mobile device integration and thermal dissipation via bottom-side thermal balls. Pin layout follows JEDEC-standard land pattern (Figure 26) and requires controlled impedance routing for AC1/AC2 inputs.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar wireless power receiver applications.

Compared with MP-A20 and BQ51222, the P9221-RAHGI8 provides higher power capability (15W), on-die alignment sensing, and full firmware programmability - enabling faster time-to-market for next-gen Qi receivers without external controller overhead.

Availability

P9221-RAHGI8 is available at Aetrix Electronics and suitable for smartphone charging, tablet power reception, wearable accessory charging, and medical portable device applications requiring stable component supply and full WPC-1.2.3 compliance.

Supply support for P9221-RAHGI8 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Integrated Device Technology (IDT), now part of Renesas Electronics, designs high-performance timing, memory interface, and wireless power solutions for communications, computing, and consumer markets.

The P9221-RAHGI8 belongs to IDT's Qi-compliant wireless power receiver product line, engineered specifically for compact, high-efficiency 15W mobile device charging with integrated intelligence and minimal external components.

FAQ

What is the maximum output power supported by the P9221-RAHGI8?

The P9221-RAHGI8 supports up to 15W of wireless power transfer when paired with a compatible WPC-compliant transmitter such as the IDT P9242-R. Its 87% peak DC-to-DC efficiency and thermal design (θJA = 47°C/W) enable sustained operation at this rating under 0–85°C ambient conditions with proper PCB layout and thermal management.

Does the P9221-RAHGI8 require an external microcontroller?

No, the P9221-RAHGI8 does not require an external microcontroller. It integrates a 32-bit ARM® Cortex®-M0 processor that executes firmware for FOD tuning, alignment sensing, power negotiation, and fault handling - eliminating the need for host MCU intervention in standard Qi operation.

How is output voltage selected on the P9221-RAHGI8?

Output voltage on the P9221-RAHGI8 is selected via the VOSET/Q-Fact pin using a resistor divider. Pulling VOSET to VDD18 through a 10kΩ resistor sets the default 12V output; alternative resistor values configure 9V or custom intermediate voltages per Table 6 in the datasheet.

What package type is used for the P9221-RAHGI8?

The P9221-RAHGI8 uses a 52-ball WLCSP (Wafer-Level Chip Scale Package) with dimensions 2.64 × 3.94 mm and 0.4 mm ball pitch (package code AHG52). This ultra-compact package supports high-density mobile PCB layouts and includes thermal balls for improved heat dissipation.

Can the P9221-RAHGI8 perform foreign object detection without external components?

Yes - the P9221-RAHGI8 implements patented hardware-accelerated foreign object detection (FOD) using internal circuitry calibrated via RPPO and RPPG pins. No external capacitors or comparators are required, as the OVP clamp and FOD engine are fully integrated, reducing BOM count and improving reliability.