Monolithic Power Systems Inc. MPQ6523GR-AEC1-Z

Overview

MPQ6523GR-AEC1-Z 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, 7V–28V VS supply range, and 0.9A per channel output current. It drives automotive window lifters, seat adjusters, and HVAC actuators with independent high-side/low-side control per bridge.

For engineers reviewing the MPQ6523GR-AEC1-Z datasheet, MPQ6523GR-AEC1-Z pinout, MPQ6523GR-AEC1-Z application, or MPQ6523GR-AEC1-Z equivalent, key selection criteria include daisy-chainable serial control, open-load/short-circuit/thermal/UVLO diagnostics, fault flag reporting, and QFN-24 wettable flank package compatibility with automotive PCB inspection requirements.

Technical Context

The MPQ6523 implements three independent half-bridge drivers with dedicated HS/LS gate drivers, charge pump, and internal logic for simultaneous or staggered switching. Each bridge supports programmable short-circuit shutdown delay (1.5ms or 12ms) and open-load detection via configurable pull-down current on low-side outputs.

Its serial interface uses CS/CLK/DI/DO signals with 16-bit input register (bit-mapped HS/LS enable, OLD, SCT, SE) and 16-bit output register (TP, SCD, PSF, status bits per channel). Fault conditions trigger an open-drain FAULT pin and set corresponding flags in the output register without requiring full register readback.

Key Specifications

Pinout & Package

MPQ6523GR-AEC1-Z is housed in a thermally enhanced QFN-24 (4mm × 4mm) package with exposed thermal pad and optional wettable flank (this variant is non-wettable flank per top marking "MPQ6523GR-AEC1" and ordering info).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TB9054FTG and DRV8876N, MPQ6523GR-AEC1-Z uniquely combines triple half-bridge topology, daisy-chain SPI, per-channel open-load detection, and thermal pre-warning in a single AEC-Q100 Grade 1 QFN package-enabling compact, diagnostics-rich automotive body control modules.

Availability

MPQ6523GR-AEC1-Z is available at Aetrix Electronics and suitable for automotive window lift systems, seat position controllers, HVAC actuator modules, and electronic parking brake subsystems requiring stable component supply across extended vehicle lifecycles.

Supply support for MPQ6523GR-AEC1-Z 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, with design centers in the US, China, and Taiwan, and global manufacturing partnerships.

The MPQ6523 belongs to MPS's automotive-grade motor driver product line, engineered specifically for ASIL-B–capable body electronics applications requiring robust diagnostics, low quiescent power, and AEC-Q100 reliability in harsh environments.

FAQ

What is the maximum allowable VS voltage for MPQ6523GR-AEC1-Z?

The absolute maximum VS voltage is 40V, but the recommended operating range is 7V to 28V. Exceeding 28V continuously risks triggering the integrated discharge circuit above ~37V and may accelerate parametric drift over lifetime. Operation at 40V is only permissible for transient events such as load dump, per ISO 7637-2 Pulse 5a.

Does MPQ6523GR-AEC1-Z support 3.3V logic I/O when VCC = 3.3V?

Yes - the serial interface is explicitly rated for 3.3V and 5V compatibility. Input thresholds scale to 0.3×VCC (low) and 0.7×VCC (high), and DO output high level is VCC − 0.7V, ensuring reliable communication with 3.3V microcontrollers without level shifters.

How does open-load detection work without external components?

When OLD bit = low, the IC activates a 1.4–2.4mA internal pull-down current on each low-side switch. An open load causes the corresponding LSx/HSx status bit in the output register to go high. Detection occurs only when the output is off, avoiding interference with active drive states.

Can multiple MPQ6523GR-AEC1-Z devices be daisy-chained on one SPI bus?

Yes - daisy chaining is supported via the DO pin, which buffers the output register data and shifts it out on the next device's DI input. All devices share CS and CLK; only the first device receives DI from the MCU, and the last device's DO connects to MCU MISO.

What is the thermal resistance θJA for the QFN-24 package?

The junction-to-ambient thermal resistance (θJA) is 42°C/W under JEDEC JESD51-7 4-layer PCB conditions. This value assumes proper thermal pad soldering and 1-in² copper pour. With optimized layout, actual θJA can improve to ≤35°C/W, supporting >0.7A continuous per channel at +105°C ambient.

Is the FAULT pin actively driven or open-drain?

The FAULT pin is open-drain and active-low. It requires an external pull-up resistor (typically 4.7kΩ to VCC or VS) to generate a valid logic-high level. The pin asserts low on any detected over-current, thermal shutdown, or UVLO condition and remains latched until the fault clears and SRR bit is written high.

Does MPQ6523GR-AEC1-Z include reverse polarity protection?

No - the device does not integrate reverse polarity protection. External protection (e.g., series MOSFET or Schottky diode) must be added at the VS input if the application is exposed to battery reversal. The internal discharge circuit only addresses overvoltage, not reverse voltage.