Texas Instruments BQ500410ARGZT

Overview

BQ500410ARGZT from Texas Instruments is a Qi-compliant wireless power transmitter manager IC designed for free-positioning 12-V systems. It integrates digital demodulation, three-coil array control, WPC 1.1–compliant foreign object detection (FOD), enhanced parasitic metal detection (PMOD), and intelligent power transfer regulation via frequency modulation (112–205 kHz). It enables tabletop charge surfaces for smartphones and sealed industrial tools.

For engineers reviewing the BQ500410ARGZT datasheet, BQ500410ARGZT pinout, BQ500410ARGZT application, or BQ500410ARGZT equivalent, key selection criteria include its VQFN-48 package, dual analog/digital 3.3-V supplies, integrated 12-bit ADC for loss threshold programming, thermal shutdown via T_SENSE, and support for both resistive and capacitive receiver modulation schemes per WPC specification.

Technical Context

The BQ500410ARGZT implements a closed-loop wireless power control architecture using digital demodulation of COMM_A+/A− and COMM_B+/B− inputs to decode WPC-compliant packets from receivers. It regulates output by dynamically adjusting switching frequency (112–205 kHz) while maintaining constant 50% duty cycle until maximum frequency is reached.

It supports three independent coil drive outputs (COIL 1.1/1.2/1.3), each with dedicated peak detection (COIL_PEAK) and synchronized analog multiplexing of communication signals. Its internal 12-bit ADC reads resistor-programmed thresholds on LOSS_THR and LED_MODE pins to configure FOD/PMOD sensitivity and dual-LED status indication behavior.

Key Specifications

Pinout & Package

The BQ500410ARGZT is housed in a 48-pin VQFN package (7.0 mm × 7.0 mm) with exposed thermal pad (EPAD) requiring direct connection to PCB ground plane for thermal management.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BQ500410ARGZT, BQ500412ARGZT reduces external power components but shares identical safety algorithms and coil management, while MP-A20 eliminates external driver dependency at the cost of losing programmable multi-coil flexibility and requiring new firmware integration.

Availability

BQ500410ARGZT is available at Aetrix Electronics and suitable for automotive infotainment systems, hermetically sealed industrial tools, and consumer tabletop charge surfaces requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for BQ500410ARGZT 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 company specializing in analog, embedded processing, and wireless technologies, with decades of leadership in power management and connectivity solutions.

The BQ500410ARGZT belongs to TI's wireless power transmitter controller product line, engineered specifically for WPC-compliant free-positioning charging systems where safety, interoperability, and thermal robustness are critical design constraints.

FAQ

What is the primary function of the BQ500410ARGZT in a wireless charging system?

The BQ500410ARGZT serves as the core transmitter manager IC in Qi-compliant wireless power systems. It handles coil selection across a three-coil array, digitally demodulates receiver packets via COMM inputs, regulates power by adjusting switching frequency (112–205 kHz), and executes WPC 1.1–compliant foreign object detection (FOD) and parasitic metal detection (PMOD). The BQ500410ARGZT does not integrate power switches-it drives external half-bridge drivers via DPWM_A output.

How does the BQ500410ARGZT implement free-positioning capability?

The BQ500410ARGZT achieves free positioning by sequentially activating each of its three coil drive outputs (COIL 1.1, COIL 1.2, COIL 1.3) every 400 ms and measuring the resulting COMM signal strength on COMM_A+/A− and COMM_B+/B− inputs. It selects the coil producing the strongest demodulated response and engages it for continuous power transfer. This allows receivers to be placed anywhere within the 70 mm × 20 mm effective charging area without precise alignment.

Can the BQ500410ARGZT operate from a 5-V input supply?

No-the BQ500410ARGZT is configured for 12-V operation by grounding the V_IN pin. Its internal biasing, regulator design, and power stage interface are optimized for 12-V input rails. While the datasheet does not specify operation at 5 V, attempting to use 5 V violates the recommended operating conditions and may result in improper startup, unstable regulation, or failure to engage coils. For lower-voltage systems, TI recommends the BQ51013B or BQ51222 series.

What role does the LOSS_THR pin play in safety compliance?

The LOSS_THR pin on the BQ500410ARGZT sets the detection threshold for both foreign object detection (FOD) and parasitic metal object detection (PMOD) by reading an external resistor value via its internal 12-bit ADC. Based on that value, the IC calculates expected vs. actual power transfer efficiency and halts charging if unaccounted losses exceed the programmed threshold (e.g., 400 mW with a 56.2-kΩ resistor). This ensures compliance with WPC 1.1 safety requirements for metallic object rejection.

Is the BQ500410ARGZT still recommended for new designs?

No-the BQ500410ARGZT is marked "Not Recommended for New Designs" in its official Texas Instruments documentation (SLUSB96A, December 2015). TI recommends migrating to newer alternatives such as the BQ500412ARGZT, which offers identical functionality with added integration (e.g., on-chip 3.3-V LDO), or to the BQ51222 family for higher-efficiency, lower-quiescent-current implementations. Legacy designs may continue using BQ500410ARGZT with full datasheet validation and awareness of end-of-life planning.