Monolithic Power Systems Inc. MPQ6523GRE-AEC1-P

Overview

MPQ6523GRE-AEC1-P from Monolithic Power Systems is a triple half-bridge motor driver IC with integrated DMOS power MOSFETs, serial SPI-compatible interface (3MHz max), AEC-Q100 Grade 1 qualification, 0.9A per channel output current, and R_DS(ON) (HS+LS) ≤2Ω at 150°C. It drives automotive seat adjusters, HVAC actuators, and mirror positioners with diagnostic feedback and fault flag output.

For engineers reviewing the MPQ6523GRE-AEC1-P datasheet, MPQ6523GRE-AEC1-P pinout, MPQ6523GRE-AEC1-P application in automotive body electronics, or MPQ6523GRE-AEC1-P equivalent for triple half-bridge motor control, this page delivers verified electrical specs, validated daisy-chain capability, thermal pre-warning behavior, wettable flank QFN-24 package details, and real-world diagnostic register mapping.

Technical Context

The MPQ6523GRE-AEC1-P implements three independent half-bridge outputs controlled via a 16-bit serial input register with bit-level enable/disable of HS/LS switches. Its internal charge pump enables high-side gate drive without external bootstrap components, and its diagnostic engine monitors open-load (via pull-down current), short-circuit (programmable 1.5ms/12ms delay), over-temperature (pre-warning at 120–170°C, shutdown at 150–200°C), and under-voltage (6.5V rising threshold).

It features an open-drain FAULT pin asserting low on any channel over-current or thermal shutdown event, and a tri-state DO pin supporting daisy-chained configurations. The device maintains full serial interface functionality in standby mode (I_VS < 6μA), with hardware EN pin and software SE bit enabling dual-control redundancy.

Key Specifications

Pinout & Package

MPQ6523GRE-AEC1-P uses a wettable flank QFN-24 (4mm × 4mm) package with exposed thermal pad, optimized for automated optical inspection (AOI) and solder joint reliability in automotive PCB assembly.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BD3704FV-M and TLE9201SG, MPQ6523GRE-AEC1-P uniquely combines SPI daisy-chaining, wettable flank packaging, and comprehensive on-die diagnostics - reducing PCB area, test cost, and firmware development effort for new automotive body electronics platforms.

Availability

MPQ6523GRE-AEC1-P is available at Aetrix Electronics and suitable for automotive seat control, HVAC actuation, and power mirror systems requiring stable component supply, AEC-Q100 compliance, and long-term production continuity.

Supply support for MPQ6523GRE-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 analog and power ICs for automotive, industrial, and computing markets.

The MPQ6523 belongs to MPS's AEC-Q100-qualified motor driver product line, designed specifically for automotive body electronics requiring functional safety-aware diagnostics, low quiescent power, and robust thermal management.

FAQ

What does the "E" suffix in MPQ6523GRE-AEC1-P signify?

The "E" denotes wettable flank lead finish on the QFN-24 package. This feature enables automated optical inspection (AOI) of solder fillets on the vertical sidewalls of the package leads, improving process yield and reliability verification in automotive PCB assembly lines without requiring X-ray inspection.

How does the open-load detection function work without external components?

When the OLD bit is set low, the MPQ6523 activates a 1.4–2.4mA internal pull-down current on each low-side switch. If no load is connected, the corresponding LSx/HSx status bit in the output register reads high. This eliminates the need for external sense resistors or comparator circuits while maintaining diagnostic coverage across all three channels.

Can MPQ6523GRE-AEC1-P drive a single H-bridge motor using two half-bridges?

Yes - by configuring OUT1 and OUT2 as complementary HS/LS pairs (e.g., HS1+LS2 for one side, HS2+LS1 for the other), the device can synthesize a full H-bridge with independent PWM control and current sensing capability. The third half-bridge remains available for auxiliary functions like brake control or sensor biasing.

What is the purpose of the discharge circuit, and when does it activate?

The discharge circuit activates when VS exceeds ~37V, discharging blocking capacitors through an internal resistor. This prevents voltage runaway during long standby periods with reverse-polarity protection diodes - a known failure mode in automotive always-on modules where quiescent current is below 20μA.

Is the FAULT pin compatible with 3.3V microcontrollers?

Yes - the FAULT pin is open-drain with 6V absolute maximum rating. When used with a 3.3V pull-up resistor, it delivers clean active-low signaling to 3.3V GPIO inputs. No level-shifting is required, simplifying interface design in mixed-voltage automotive ECUs.

Does the MPQ6523GRE-AEC1-P support PWM frequency scaling?

No - the device does not generate PWM internally. It accepts digital HS/LS enable commands via SPI and relies on external MCU-generated PWM signals applied to the HS/LS control bits. Switching speed is limited by OUTx rise/fall times (2–50μs) and dead time (2μs), supporting PWM frequencies up to ~100kHz in practice.

How is thermal pre-warning (TP bit) accessed without full register read?

By pulling CS low and immediately reading DO before issuing a full 16-bit transfer, the TP bit appears directly on DO within 200ns. This allows microcontrollers to poll junction temperature status asynchronously without disrupting ongoing control register updates - essential for real-time thermal management.