Texas Instruments BQ50002ARHBR

Overview

BQ50002ARHBR from Texas Instruments is a WPC v1.2-compliant 5-V wireless power transmitter analog front end (AFE), integrating full-bridge MOSFET drivers, synchronous N-channel power FETs, variable-frequency oscillator, high-sensitivity 2-channel demodulator, and accurate current sense amplifier. It delivers up to 5 W to the receiver, supports dynamic power limiting (DPL™), and enables >75% system efficiency when paired with bq500511A controller in smartphone and wearable charging pads.

For engineers reviewing the BQ50002ARHBR datasheet, BQ50002ARHBR pinout, BQ50002ARHBR application, or BQ50002ARHBR equivalent, key selection criteria include its QFN-32 package thermal performance (R_θJA = 40.6°C/W), integrated 50× current sense gain for foreign object detection (FOD), dual-mode control (PWM or self-switching frequency/duty adjustment), and compatibility exclusively with bq500511A-not bq500511-for FOD-enabled operation.

Technical Context

The BQ50002ARHBR implements a full-bridge power stage with integrated high-side/low-side N-channel MOSFETs (SW1/SW2 switch nodes), bootstrapped gate drivers (BOOT1/BOOT2), and dual independent demodulation channels (DMIN1/DMIN2 → DMOUT1/DMOUT2) for WPC v1.2-compliant amplitude-modulated communication from receiver to transmitter. Its internal oscillator operates from 110 kHz to 205 kHz, with frequency or duty-cycle control via MODE/PWM_CTRL/UP_DN/CLK_IN interface.

It integrates a 3-V LDO regulator (BP3 output, 2.9–3.1 V at 14 mA max) for powering the companion bq500511A controller, and features ultra-low standby power (<30 mW during digital ping). FOD is implemented by measuring input DC current via CSP/CSN inputs with 50 V/V gain and feeding the CSO output to bq500511A for real-time power-loss comparison against receiver-reported values.

Key Specifications

Pinout & Package

Package: 32-pin QFN (RHB), 5.00 mm × 5.00 mm, thermally enhanced with exposed thermal pad (PGND-connected).

Key Features

Applications

Equivalent & Alternatives

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

Compared with bq500212ARHBR and MP-A21, the BQ50002ARHBR uniquely delivers certified WPC v1.2 A11 compliance through tightly coupled analog functions-including dual-channel demodulation, integrated LDO, and FOD-optimized current sensing-requiring no MCU-level firmware development while maintaining full hardware-level control over power stage behavior.

Availability

BQ50002ARHBR is available at Aetrix Electronics and suitable for smartphone charging pads, wearable device docks, and medical sensor chargers requiring stable component supply, long-term lifecycle support, and WPC certification readiness.

Supply support for BQ50002ARHBR 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

Texas Instruments is a global semiconductor leader delivering analog and embedded processing solutions, with deep expertise in power management, signal chain, and wireless charging technologies.

The BQ50002ARHBR belongs to TI's Wireless Power Transmitter AFE product line, engineered specifically to simplify WPC v1.2-compliant 5-W transmitter design by integrating all critical analog functions-power switching, demodulation, sensing, and regulation-into a single QFN package.

FAQ

What is the role of BQ50002ARHBR in a wireless power transmitter system?

The BQ50002ARHBR serves as the analog front end in a two-chip wireless power transmitter solution, handling full-bridge power switching, amplitude-modulated signal demodulation from the receiver, accurate input current sensing for foreign object detection, and 3-V LDO regulation for the companion bq500511A controller. It does not operate standalone-the BQ50002ARHBR must be used with bq500511A to achieve WPC v1.2 compliance and full functionality including FOD and DPL™.

Does BQ50002ARHBR support direct replacement of bq500511?

No, the BQ50002ARHBR is incompatible with the bq500511 controller for foreign object detection (FOD) operation. The datasheet explicitly states that BQ50002ARHBR is designed to work exclusively with bq500511A. Using bq500511 instead disables FOD capability and violates WPC v1.2 A11 specification requirements-making the BQ50002ARHBR + bq500511 combination unsuitable for certified applications.

What package type and thermal characteristics does BQ50002ARHBR have?

The BQ50002ARHBR is packaged in a 32-pin QFN (RHB) with nominal body size 5.00 mm × 5.00 mm and an exposed thermal pad connected to PGND. Its junction-to-ambient thermal resistance (R_θJA) is 40.6°C/W, junction-to-board (R_θJB) is 13.1°C/W, and junction-to-case (bottom) is 5.7°C/W-enabling efficient heat dissipation in compact charging pad PCB layouts without mandatory heatsinking.

How does BQ50002ARHBR implement foreign object detection (FOD)?

The BQ50002ARHBR implements FOD by measuring average input DC current via its integrated current sense amplifier (50 V/V gain) across CSP/CSN pins, outputting the result as an analog voltage on CSO. This signal is read by the bq500511A controller, which compares delivered power (calculated from CSO) against received power reported by the receiver. A significant mismatch triggers FOD shutdown-ensuring safety when metallic objects enter the magnetic field.

Can BQ50002ARHBR operate without the bq500511A controller?

No, the BQ50002ARHBR cannot operate autonomously. It lacks internal digital control logic, packet decoding, or closed-loop regulation firmware. All system-level functions-including ping initiation, packet parsing, power negotiation, FOD decision-making, and LED indication-are handled by the bq500511A. The BQ50002ARHBR provides only the analog infrastructure: power switching, demodulation, sensing, and regulation-making it functionally dependent on bq500511A.