Renesas P9035-0NTGI

Overview

P9035-0NTGI from Integrated Device Technology is a WPC 1.1-compliant single-chip 5V wireless power transmitter IC for A5/A11 base stations, featuring integrated half-bridge inverter, 110–205 kHz switching frequency range, I²C interface, and Foreign Object Detection (FOD) support. It delivers up to 5W output with closed-loop power control and proprietary back-channel communication when paired with IDTP9020 receivers.

For engineers reviewing the P9035-0NTGI datasheet, P9035-0NTGI pinout, P9035-0NTGI application, or P9035-0NTGI equivalent, this device requires attention to its 48-pin TQFN package, multi-rail 5V supply architecture (5V_A–5V_G), SW node paralleling requirement, thermal shutdown threshold at 140°C, and mandatory external half-bridge integration for full-bridge operation.

Technical Context

The P9035-0NTGI implements a digital MCU-based control loop that modulates full-bridge switching frequency (110–205 kHz) at fixed 50% duty cycle to regulate power transfer per WPC A5/A11 specification. Its demodulator recovers WPC-compliant message packets via HPF-coupled back-channel communication, enabling real-time receiver feedback for dynamic power adjustment.

It integrates an on-die 40 MHz MCU with 12-bit ADC (8 channels, 62.5 kSPS), LDO2P5V regulator (2.5 V, internal bias only), and GPIO-controlled LED/buzzer outputs. Protection includes cycle-by-cycle over-current (4–7 A trip), thermal shutdown (140°C rising / 110°C falling), and configurable FOD using coil impedance analysis.

Key Specifications

Pinout & Package

Package: NTG48 - 6 mm × 6 mm × 0.75 mm TQFN-48L with 0.4 mm pitch and center exposed thermal pad (EP) electrically tied to GND.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MP-A20 and BQ500212A, the P9035-0NTGI uniquely combines WPC 1.1 A5/A11 compliance, integrated MCU-based protocol execution, and native back-channel compatibility with IDT receivers-making it optimal for turnkey, self-contained base stations requiring minimal external components and seamless IDTP9020 pairing.

Availability

P9035-0NTGI is available at Aetrix Electronics and suitable for wireless charging base stations, consumer electronics docks, and industrial tool chargers requiring stable component supply, long-term lifecycle support, and WPC certification readiness.

Supply support for P9035-0NTGI 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, is a fabless semiconductor company specializing in timing, memory interface, RF, and wireless power solutions for communications, computing, and consumer markets.

The P9035-0NTGI belongs to IDT's wireless power transmitter product line, designed specifically to simplify WPC-compliant A5/A11 base station development with integrated control, protection, and communication functions in a single IC.

FAQ

What is the required external half-bridge configuration for P9035-0NTGI?

The P9035-0NTGI integrates only a half-bridge and requires an external complementary half-bridge to form a full-bridge inverter. SW pins 33–35 must be paralleled and connected to the external high-side and low-side FETs driving the WPC A5/A11 coil. The external FETs must withstand ≥20 V and handle peak currents up to 7 A, as specified by the P9035-0NTGI's OCP threshold.

Does P9035-0NTGI support WPC Qi certification out of the box?

Yes, the P9035-0NTGI implements the complete WPC 1.1 A5/A11 transmitter protocol stack-including selection, ping, identification/configuration, and power transfer phases-and is designed to meet Qi certification requirements when used with compliant coils, resonant capacitors, and layout per IDT reference design AN-9035. Final certification requires full-system testing.

How does P9035-0NTGI implement Foreign Object Detection (FOD)?

The P9035-0NTGI uses a proprietary multi-layer FOD algorithm analyzing coil impedance shifts, Q-factor degradation, and power transfer inefficiency during ping and power transfer phases. While basic FOD is enabled in standard firmware, advanced variants require customization through IDT; the P9035-0NTGI provides the hardware foundation and ADC inputs needed for robust metallic object detection.

Can P9035-0NTGI operate without an external microcontroller?

Yes, the P9035-0NTGI contains an embedded 40 MHz MCU with ROM, RAM, and OTP memory, enabling fully autonomous operation. It executes the WPC protocol stack independently, manages GPIO-driven LEDs/buzzer, and performs closed-loop power control-requiring only I²C for optional host interaction or firmware updates, not core functionality.

What are the critical PCB layout requirements for P9035-0NTGI's thermal performance?

For optimal thermal performance, the P9035-0NTGI's EP pad must be soldered to a large GND copper area with a 5×5 matrix of plated-through vias connecting to inner/ground planes. Per datasheet, θJA is 30.8°C/W on a JEDEC 4-layer board; inadequate via count or insufficient copper area will cause junction temperature to exceed 125°C under 5W operation, triggering thermal shutdown.