Qorvo PAC55710QM-T

Overview

PAC55710QM-T from Qorvo is a Power Application Controller® (PAC) IC optimized for high-speed BLDC motor control in compact power electronics systems. It integrates a 150MHz Arm® Cortex®-M4F core, 128kB FLASH/32kB SRAM, 2.5MSPS 12-bit ADC, Multi-Mode Power Manager (buck/SEPIC), and Application Specific Power Drivers (3 high-side/3 low-side, 1.2A/1.8A gate drive) - enabling single-chip motor control in power tools and e-mobility ESCs.

For engineers reviewing the PAC55710QM-T datasheet, pinout, applications, or equivalent options, key selection criteria include integrated gate driver capability, on-chip analog front-end with BEMF comparator mode, CAN 2.0A/B interface, and TQFN-48 (6×6 mm) package compatibility with thermal and layout constraints in space-constrained motor drives.

Technical Context

The PAC55710QM-T implements a tightly coupled system-on-chip architecture where the Arm Cortex-M4F core directly controls PWM timers, dead-time generators, and DTSE-triggered ADC sampling for real-time sensorless BLDC commutation. Its Configurable Analog Front-End includes dedicated BEMF comparator mode with virtual center-tap support, enabling robust rotor position estimation without external hardware.

Power management is handled by the Multi-Mode Power Manager, which supports configurable buck or SEPIC DC/DC topologies (5–20V input) plus four linear regulators - all with integrated power/temperature monitoring, hibernate control, and fault detection. The Application Specific Power Drivers provide cycle-by-cycle PWM truncation with V_DS sensing for overcurrent protection in half-bridge and 3-phase configurations.

Key Specifications

Pinout & Package

The PAC55710QM-T is housed in a 48-pin, 6×6 mm TQFN package with an exposed thermal pad. Pin functions are defined per Figure 8-1 (PAC55710QM Pin Configuration) in the official datasheet.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar BLDC motor controller applications.

Compared with STSPIN32F0B and XMC4400-F100K512, the PAC55710QM-T delivers higher integration density and application-specific features - including BEMF comparator mode, multi-mode power management, and CAN - reducing total system component count by up to 35% in 12–24V BLDC ESCs.

Availability

PAC55710QM-T is available at Aetrix Electronics and suitable for power tools, e-mobility ESCs, and industrial robotics requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for PAC55710QM-T 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

Qorvo is a U.S.-based semiconductor company specializing in RF, power management, and highly integrated mixed-signal solutions for mobile, infrastructure, and defense markets.

The PAC55710QM-T belongs to Qorvo's Power Application Controller® family, designed specifically to replace discrete MCU + gate driver + analog signal chain combinations in BLDC motor control systems - targeting space-constrained, high-efficiency applications from consumer power tools to industrial automation.

FAQ

What is the primary function of the PAC55710QM-T in a motor control system?

The PAC55710QM-T serves as a complete system-on-chip BLDC motor controller, integrating the Arm Cortex-M4F MCU core, gate drivers, analog front-end, power management, and communication peripherals. In practice, the PAC55710QM-T executes real-time commutation algorithms, regulates motor current via cycle-by-cycle PWM truncation, conditions analog feedback signals, and interfaces with host systems via CAN or UART - eliminating the need for external drivers, op-amps, or PMICs in compact ESC designs.

Does the PAC55710QM-T support sensorless BLDC commutation?

Yes, the PAC55710QM-T supports sensorless commutation through its Configurable Analog Front-End, which includes a dedicated BEMF comparator mode with virtual center-tap functionality. This allows the PAC55710QM-T to detect back-EMF zero-crossings without external components, enabling reliable trapezoidal commutation in power tools and scooters. The DTSE synchronizes ADC sampling to PWM events, further enhancing timing accuracy for sensorless operation.

What power supply topologies does the Multi-Mode Power Manager in the PAC55710QM-T support?

The Multi-Mode Power Manager in the PAC55710QM-T supports both buck and SEPIC DC/DC converter topologies, configurable via firmware. It accepts a direct battery input from 5V to 20V and generates regulated supplies for internal circuitry and external peripherals. Additionally, the PAC55710QM-T integrates four linear regulators with hibernate control and power/temperature monitoring - providing a complete, self-contained power solution for standalone ESC modules.

Is the PAC55710QM-T pin-compatible with other devices in the PAC557xx family?

No, the PAC55710QM-T is not pin-compatible with PAC55711QM-T. While both share the same 48-pin TQFN-6×6 package, Figure 8-3 in the datasheet shows functional differences in pin assignments - notably, PAC55711QM-T includes nDRVDIS and nBRAKE pins not present on PAC55710QM-T. Therefore, PCB layouts designed for PAC55710QM-T cannot be reused for PAC55711QM-T without revision.

What is the maximum PWM resolution and frequency supported by the PAC55710QM-T?

The PAC55710QM-T supports up to 300MHz input clock for its PWM timers, enabling high-resolution timing control. Its four 16-bit timers deliver up to 32 PWM/CC blocks with programmable dead-time insertion, and 16 dedicated hardware dead-time generators ensure precise shoot-through prevention. In practice, the PAC55710QM-T achieves <1 ns effective resolution at 20 kHz switching frequencies - critical for low-noise, high-efficiency BLDC operation in fans and robotics.