Qorvo PAC5524AQFSR

Overview

PAC5524AQFSR from Qorvo is a Power Application Controller® (PAC) IC integrating a 150MHz Arm® Cortex®-M4F MCU core, Multi-Mode Power Manager™, Configurable Analog Front-End™, and Application Specific Power Drivers™ for compact BLDC motor control. It delivers 128kB FLASH, 32kB SRAM, 2.5MSPS 12-bit ADC, and integrated 3-phase gate drivers in an 8×8mm 64-pin QFN package - optimized for battery-powered e-bike, power tool, and drone motor drives.

For engineers reviewing the PAC5524AQFSR datasheet, pinout, applications, or equivalent options, this page provides verified technical context, real-world design meaning of key specs, validated pin functions, confirmed alternative parts with functional distinctions, and supply-chain support details specific to PAC5524AQFSR's MCU v2 revision and tape-and-reel (100-piece) packaging.

Technical Context

The PAC5524AQFSR implements a tightly coupled system-on-chip architecture where the Arm Cortex-M4F core directly controls the MMPM's multi-mode switching supply (Buck/SEPIC), manages CAFE's 7 programmable gain amplifiers and 3 comparators for real-time current/voltage feedback, and configures ASPD's 3 high-side and 3 low-side gate drivers with hardware-enforced dead-time. Its DTSE engine enables autonomous ADC sampling sequences triggered by PWM edges or timers - critical for sensorless FOC in BLDC systems.

Power sequencing is deterministic: VP ramps to 15V during safe-start (9.5kHz), then linear regulators (VSYS, VCCIO, VCC33, VCORE, VCC18) power up sequentially after VP exceeds 4.3V; hibernate mode draws only 18µA from VP while retaining fault status bits. All regulators feature programmable over-current shutdown and power-good monitoring via VMON/ADC.

Key Specifications

Pinout & Package

Package: 8×8mm, 64-lead QFN with exposed thermal pad (TQFN88-64L). Pinout validated per PAC5524/PAC5524A Data Sheet v2.2 Sections 21.1–21.4.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STSPIN32F0B and XMC4400-F100K512, PAC5524AQFSR uniquely integrates power conversion, analog sensing, and gate driving - reducing component count by 22 parts and eliminating 3 PCB layers typically needed for signal integrity in discrete implementations.

Availability

PAC5524AQFSR is available at Aetrix Electronics and suitable for electric power tools, e-bike motor controllers, and drone propulsion systems requiring stable component supply, long-term lifecycle assurance, and tape-and-reel (100-piece) prototyping quantities.

Supply support for PAC5524AQFSR 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 motion control ICs for mobile, infrastructure, and aerospace markets.

The PAC5524AQFSR belongs to Qorvo's Power Application Controller® family, designed specifically to replace multi-chip motor control solutions with a single, highly integrated SoC for compact, high-efficiency BLDC applications.

FAQ

What distinguishes PAC5524AQFSR from the earlier PAC5524QF?

PAC5524AQFSR implements the PAC55xx MCU v2 architecture, which includes enhanced peripheral clock gating for lower active power, updated DTSE sequencer logic for improved ADC trigger reliability, and revised MMPM register maps for simplified DC/DC configuration. Unlike PAC5524QF (MCU v1), PAC5524AQFSR supports 500kHz switching frequency in high-frequency mode and adds hibernate wake-up timer granularity down to 125ms. Both share identical pinout and package.

Does PAC5524AQFSR support sensorless BLDC commutation?

Yes, PAC5524AQFSR supports sensorless commutation via its integrated CAFE comparators and DTSE-triggered ADC. The 3 protection comparators can monitor back-EMF zero-crossings on motor phases, while the 2.5MSPS ADC samples phase currents synchronously to PWM edges - enabling robust observer-based FOC or six-step commutation without Hall sensors or encoders.

Can PAC5524AQFSR operate without the MMSS controller?

Yes, PAC5524AQFSR can bypass the MMSS controller by connecting VP and VHM directly to a stable 5–20V external supply. In this mode, the microcontroller disables the MMSS block, and the five linear regulators (VSYS, VCCIO, VCC33, VCORE, VCC18) power up directly from VP - reducing system complexity for applications with pre-regulated supplies like 12V automotive or 5V USB-PD sources.

What thermal management is required for PAC5524AQFSR in continuous 5W operation?

At 5W dissipation, PAC5524AQFSR requires a minimum 250mm² copper pour connected to the exposed thermal pad with ≥4 thermal vias (0.3mm diameter) to an internal ground plane. With this layout, junction temperature rise is ≤35°C above ambient, keeping Tj < 110°C at TA = 75°C - well within the −40°C to +125°C rating. No heatsink is needed for typical motor drive duty cycles.

How does PAC5524AQFSR handle over-current protection in the ASPD block?

PAC5524AQFSR implements dual-stage over-current protection in its ASPD block: fast hardware shutdown (<200ns) triggered by CAFE protection comparators monitoring shunt voltage, and software-configurable current limiting via the DTSE-driven ADC sampling loop. Fault events set persistent status bits readable by the Cortex-M4F core, allowing controlled ramp-down or immediate latch-off based on application safety requirements.