Monolithic Power Systems Inc. MPQ1922GVE-AEC1-Z

Overview

MPQ1922GVE-AEC1-Z from Monolithic Power Systems is a 100V, single-channel half-bridge pre-driver IC for automotive motor control, delivering 3A source / 4A sink gate drive current, integrated current-sense amplifier with programmable gain (21–210 V/V), and AEC-Q100 Grade 1 qualification. It drives external N-channel MOSFETs in BLDC/PMSM inverters up to 100V bus voltage.

For engineers reviewing the MPQ1922GVE-AEC1-Z datasheet, MPQ1922GVE-AEC1-Z pinout, MPQ1922GVE-AEC1-Z application, or MPQ1922GVE-AEC1-Z equivalent, key selection concerns include HS/LS desaturation thresholds (1.9V LS / VG−1.2V HS), adaptive dead-time behavior vs. slew-rate setting (RSR = 0Ω to 100kΩ), thermal shutdown at 190°C, and wettable-flank QFN-22 package compatibility with automated optical inspection.

Technical Context

The MPQ1922GVE-AEC1-Z implements a charge-pump-assisted bootstrap architecture to sustain high-side gate drive at 100% duty cycle, with auto-refresh triggered when BST voltage falls below VG × 0.65. Its dual-stage protection includes desaturation detection with 2µs deglitch and latch-off fault reporting via open-drain nFAULT.

It integrates a fully programmable current-sense amplifier (gain set by CSG resistor: 0Ω/10kΩ/30kΩ/100kΩ) with CSR-referenced bipolar output and CSEN-controlled enable, enabling multi-device time-multiplexed ADC sampling. Slew rate is controlled via RSR-connected resistance, directly adjusting pull-up (1.8–100Ω) and pull-down (1.4–42Ω) gate drive impedances.

Key Specifications

Pinout & Package

MPQ1922GVE-AEC1-Z uses a thermally enhanced QFN-22 (4mm × 5mm) package with wettable flanks and exposed thermal pad (Pin 12) for PCB-level heat dissipation. The package supports reflow-compatible solder joint inspection and delivers θJA = 40°C/W on 4-layer boards.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MPQ1922GV-AEC1-Z, the GVE-AEC1-Z adds wettable flanks for AOI without altering drive strength or protection features; versus MPQ1922GVE-Z, it adds full AEC-Q100 Grade 1 validation-critical for automotive powertrain and chassis systems requiring zero-defect reliability.

Availability

MPQ1922GVE-AEC1-Z is available at Aetrix Electronics and suitable for automotive HVAC blowers, electric power steering assist motors, and onboard charger coolant pumps requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MPQ1922GVE-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 power management ICs, with design centers in the US, China, and Taiwan, and global manufacturing partnerships.

The MPQ1922 product line delivers AEC-Q100-qualified half-bridge pre-drivers optimized for automotive motor control, emphasizing robust gate drive, integrated diagnostics, and thermal resilience in space-constrained modules.

FAQ

What is the purpose of the AR pin, and how does it affect BST refresh behavior?

The AR pin controls and reports bootstrap auto-refresh: when grounded, it enables automatic BST refresh cycles if VBST falls below VG × 0.65; when pulled high, it disables auto-refresh and pulls low only during active refresh, allowing external systems to monitor or trigger manual BST recharge via LS-FET activation.

Can the MPQ1922GVE-AEC1-Z drive both high-side and low-side MOSFETs simultaneously?

No-it enforces shoot-through protection by never allowing simultaneous HS and LS FET conduction. When both INH and INL are high, the outputs enter high-impedance state. Adaptive dead time (enabled when RSR ≥ 10kΩ) further ensures full gate discharge before opposite FET turn-on.

How does the current-sense amplifier handle bidirectional current measurement?

By connecting CSR to a stable reference voltage (e.g., 2V), the CSO output is biased to that voltage at zero current. Positive and negative shunt voltages shift CSO above or below CSR, enabling full-scale bidirectional sensing-essential for regenerative braking current monitoring in e-bikes and OBCs.

What is the minimum BST capacitor value required for reliable operation?

Minimum BST capacitance is calculated as C_BST ≥ Q_G / (V_DRV − V_OUT), where Q_G is the MOSFET's total gate charge. For typical 20nC MOSFETs and 12V gate drive, ≥100nF X5R/X7R ceramic is recommended; values >1µF risk startup instability and are not advised.

Does the device support 100% duty cycle operation, and what mechanism enables it?

Yes-via an internal charge pump that continuously replenishes BST capacitor leakage. This sustains high-side gate voltage indefinitely at 100% duty cycle, unlike basic bootstrap-only drivers that require periodic LS-FET conduction to recharge BST.

What happens during thermal shutdown, and how is recovery initiated?

At 190°C junction temperature, the device latches off, disables all gate outputs, and pulls nFAULT low. Recovery requires either removal of VG supply or assertion of nSLEEP low, followed by re-enabling-no automatic reset occurs to prevent unsafe restart under thermal fault conditions.

Is the nFAULT pin compatible with direct connection to ENBL for automatic retry after fault?

Yes-connecting nFAULT to ENBL via a pull-up resistor creates an auto-retry loop: fault assertion pulls ENBL low, resetting the fault condition; the pull-up then restores ENBL high after a delay set by RC time constant, enabling controlled restart attempts.