Monolithic Power Systems Inc. MPQ6524GRE-AEC1-P

Overview

MPQ6524GRE-AEC1-P from Monolithic Power Systems is a quad half-bridge motor driver IC with integrated DMOS power MOSFETs, serial SPI-compatible interface (up to 3MHz), AEC-Q100 Grade 1 qualification, 0.9A per channel output current, and comprehensive diagnostics including open-load, short-circuit, over-temperature pre-warning/shutdown, and under-voltage protection - used in automotive seat/mirror actuation and HVAC damper control.

For engineers reviewing the MPQ6524GRE-AEC1-P datasheet, MPQ6524GRE-AEC1-P pinout, MPQ6524GRE-AEC1-P application, or MPQ6524GRE-AEC1-P equivalent, key selection considerations include its QFN-24 wettable flank package, 7V–28V VS operating range, <6μA standby quiescent current, fault flag signaling, and daisy-chainable serial interface for multi-device coordination in space-constrained automotive modules.

Technical Context

The MPQ6524 implements four independent half-bridge outputs controlled via a 16-bit SPI register map with dedicated control bits for each high-side/low-side switch (HS1–HS4, LS1–LS4), plus configuration bits for open-load detection (OLD), short-circuit timer (SCT), and software enable (SE). Its internal charge pump enables high-side gate drive without external bootstrap components.

Diagnostic reporting occurs through a 16-bit readback register with status bits for temperature pre-warning (TP), short-circuit detection (SCD), power supply fail (PSF), and per-channel open-load flags (LSx/HSx), all accessible via the same serial interface - enabling real-time health monitoring without additional GPIO overhead.

Key Specifications

Pinout & Package

MPQ6524GRE-AEC1-P is housed in a QFN-24 (4mm × 4mm) wettable flank package with exposed thermal pad, optimized for automated optical inspection (AOI) and thermal performance in automotive PCBs.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar quad half-bridge motor driver applications.

Compared with TLE9201SG and BD1694FS, MPQ6524GRE-AEC1-P delivers superior integration (no external bootstrap, built-in discharge circuit), richer diagnostics (per-channel open-load, thermal pre-warning), and broader voltage/logic compatibility - making it optimal for next-generation automotive body electronics requiring functional safety-aware control and compact layout.

Availability

MPQ6524GRE-AEC1-P is available at Aetrix Electronics and suitable for automotive seat actuation, HVAC damper control, and industrial linear actuator applications requiring stable component supply, AEC-Q100 compliance, and long-term production continuity.

Supply support for MPQ6524GRE-AEC1-P 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

Monolithic Power Systems (MPS) is a fabless semiconductor company specializing in high-performance power management ICs, with design centers in the US, China, and Taiwan, and global manufacturing partnerships.

The MPQ6524 belongs to MPS's automotive-grade motor driver product line, engineered specifically for reliable, diagnostic-rich control of DC loads in harsh environments - targeting body electronics, comfort systems, and electrified chassis subsystems.

FAQ

What is the function of the SE bit in the input register?

The SE (Software Enable) bit (bit 15) controls the digital core's operational state: when low, it places the MPQ6524 in standby mode - disabling all output stages while keeping the serial interface active for configuration and status reads. This complements the hardware EN pin, allowing flexible power management via firmware without losing communication capability.

How does open-load detection work without external components?

When the OLD bit (bit 13) is set low, the MPQ6524 internally activates a weak pull-down current on each low-side switch. If no load is connected, the corresponding LSx or HSx status bit in the output register reads high. The method works for both low-side and high-side configurations and requires no external resistors or sense lines - verified by internal comparator thresholds and timing.

Can MPQ6524GRE-AEC1-P drive a full H-bridge per channel?

No. The MPQ6524 provides four independent half-bridges - meaning each channel has one high-side and one low-side MOSFET, but they cannot be simultaneously driven to create a full bridge across a single load. It is designed for driving up to four separate uni-directional or bi-directional DC loads (e.g., four solenoids or four motor windings), not one 4-quadrant motor.

What happens when the FAULT pin goes low?

The FAULT pin asserts low when any channel triggers over-current protection, thermal shutdown, or under-voltage lockout. It remains latched low until the fault condition is cleared (e.g., load removed, temperature reduced, VS restored) and the SRR bit (bit 0) is written high to reset the internal fault latch - ensuring persistent fault indication until host MCU intervention.

Is the QFN-24 wettable flank package compatible with standard reflow profiles?

Yes. The MPQ6524GRE-AEC1-P's QFN-24 wettable flank package is qualified for IPC/JEDEC J-STD-020 moisture sensitivity level 3 and supports standard lead-free reflow profiles (peak 260°C). The wettable flank design ensures reliable solder fillet formation for automated optical inspection (AOI) and mechanical strength in automotive vibration environments.

Does the MPQ6524 support daisy-chaining with mixed voltage logic levels?

Yes. The serial interface accepts 3.3V or 5V logic levels on DI, CLK, and CS, and outputs DO at VCC-referenced levels. When daisy-chaining multiple MPQ6524 devices, the DO of one can directly drive the DI of the next, provided VCC is consistent across the chain - enabling scalable multi-driver systems with minimal MCU resource usage.

What is the purpose of the internal discharge circuit?

The internal discharge circuit activates when VS exceeds ~37V, safely bleeding charge from blocking capacitors during long standby periods. This prevents overvoltage damage caused by leakage currents charging the capacitor when reverse-polarity protection diodes block discharge paths - eliminating the need for external bleeder resistors and saving board space.