Monolithic Power Systems Inc. MPQ1922GV-AEC1-P

Overview

MPQ1922GV-AEC1-P 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 MPQ1922GV-AEC1-P datasheet, MPQ1922GV-AEC1-P pinout, MPQ1922GV-AEC1-P application in motor drives, or MPQ1922GV-AEC1-P equivalent for automotive gate driving, this page delivers verified functional context, validated pin roles, confirmed slew-rate and desaturation protection behavior, and real-world thermal shutdown and fault reporting implementation details.

Technical Context

The MPQ1922GV-AEC1-P implements a dual-stage high-side gate drive architecture: bootstrap capacitor (BST–OUT) provides primary HS-FET turn-on energy, while an internal charge pump with auto-refresh (controlled via AR pin) sustains gate voltage during 100% duty-cycle operation. Its adaptive dead-time logic monitors GH/GL voltage transitions to prevent shoot-through when slew rate is configured via RSR resistor (10kΩ–100kΩ).

Desaturation detection operates on both HS and LS FETs using dedicated VDSTHH (VG − 1.2V) and VDSTHL (1.9V) thresholds with 2µs deglitching; fault status is reported via open-drain nFAULT with automatic latch-off until ENBL deassertion, VG removal, or nSLEEP activation. The integrated current-sense amplifier supports bidirectional sensing via CSR bias reference and four discrete gain settings (21–210 V/V) set by CSG-to-GND resistor.

Key Specifications

Pinout & Package

MPQ1922GV-AEC1-P uses a thermally enhanced QFN-22 (4mm × 5mm) package with wettable flanks and exposed thermal pad (Pin 12) for PCB-level heat dissipation. Package meets MSL Level 2 moisture sensitivity requirements.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MPQ1922GV-AEC1-P, the GVE variant adds manufacturability assurance via wettable flanks without altering drive strength or protection features, while the -Z suffix reflects packaging-only differentiation - neither affects thermal performance, current sensing accuracy, or AEC-Q100 compliance.

Availability

MPQ1922GV-AEC1-P is available at Aetrix Electronics and suitable for automotive HVAC blowers, electric power steering assist motors, and coolant pumps requiring stable component supply with full AEC-Q100 traceability and long-term lifecycle support.

Supply support for MPQ1922GV-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 MPQ1922 product line targets automotive-grade motor control applications, delivering integrated gate driving, current sensing, and protection functions in compact packages to replace multi-chip solutions in BLDC and PMSM inverters.

FAQ

What is the maximum recommended BST capacitor value for MPQ1922GV-AEC1-P?

The BST capacitor must not exceed 1µF to avoid improper startup behavior. For most 48V–96V motor drives, a 220nF–470nF X7R ceramic capacitor rated for ≥25V is optimal - it balances fast recharge during LS conduction with minimal voltage droop during sustained HS conduction.

How does the MPQ1922GV-AEC1-P handle shoot-through prevention?

It enforces positive dead time through input logic (Table 1) and adds adaptive dead time when slew rate is set via RSR ≥10kΩ. During HS turn-off, GL remains active until GH voltage drops below threshold, ensuring LS gate is fully discharged before turn-on - eliminating reliance on external timing circuits.

Can the current-sense amplifier measure bidirectional motor current?

Yes. By connecting CSR to a stable 2V reference, the CSO output centers at 2V at zero current. Positive motor current shifts CSO above 2V; negative (regenerative) current shifts it below - enabling full four-quadrant control in PMSM vector drives without external level-shifting circuitry.

What happens if the nFAULT pin is left unconnected?

nFAULT is an open-drain output requiring an external pull-up resistor (typically 4.7kΩ to 3.3V). If left floating, fault conditions cannot be detected by the host MCU, and the device will remain latched off after first fault - causing permanent loss of motor control until power cycle or nSLEEP reset.

Is the MPQ1922GV-AEC1-P compatible with 3.3V logic microcontrollers?

Yes. Its logic inputs (INH, INL, ENBL, nSLEEP, CSEN) accept VIH ≥2.2V and VIL ≤0.8V, making them fully compatible with standard 3.3V CMOS outputs. No level-shifting is needed - direct connection to STM32, NXP S32K, or Infineon AURIX MCUs is supported.

Does the internal charge pump eliminate the need for a bootstrap capacitor?

No. The charge pump only maintains BST voltage during steady-state 100% duty cycle; it lacks peak current capability to initially charge CBST. A 100nF–1µF ceramic capacitor between BST and OUT remains mandatory for reliable startup and transient gate drive energy delivery.

How is thermal performance affected by the exposed pad connection?

The exposed thermal pad (Pin 12) must be soldered to a minimum 100mm² copper pour with ≥4 thermal vias to internal ground planes. Without proper thermal land design, θJA rises from 40°C/W to >65°C/W - risking thermal shutdown at >2.2W dissipation in ambient >85°C environments.