Monolithic Power Systems Inc. MP6612DGF-P

Overview

MP6612DGF-P from Monolithic Power Systems is a 40V, 5A H-bridge DC motor driver IC with integrated current sensing, cycle-by-cycle current regulation, and comprehensive fault protection (OCP/OVP/UVLO/OTP). It uses four N-channel MOSFETs with internal charge pump for 100% duty-cycle operation and delivers precise current feedback via VISEN pin (±5% accuracy) in brushed DC motor control applications requiring reversible drive and stall-current limiting.

For engineers reviewing the MP6612DGF-P datasheet, MP6612DGF-P pinout, MP6612DGF-P application, or MP6612DGF-P equivalent, this device supports DIR/ENBL logic interface, configurable current limit via ISET resistor, low-IQ brake mode (35–70 μA), and TSSOP-20EP thermal-pad package - critical for compact industrial actuators, door latches, and solenoid drivers demanding robust overcurrent and thermal resilience.

Technical Context

The MP6612DGF-P implements a constant-off-time PWM current regulation architecture triggered when sensed load current reaches 1.5V at the ISET pin, enabling precise stall-current limiting without external shunt resistors. Its dual low-side MOSFET on-resistance (45 mΩ typ.) enables accurate current sensing during slow-decay braking and forward/reverse commutation.

Control logic uses DIR (direction) and ENBL (enable) inputs with internal pull-down resistors (500 kΩ on nSLEEP, 200 kΩ on DIR/ENBL), supporting industry-standard PWM interfaces. Fault reporting is delivered via open-drain nFAULT pin, while OCP threshold is programmable between 10.5 A (OC_ADJ floating) and 20 A (OC_ADJ grounded).

Key Specifications

Pinout & Package

TSSOP-20EP package with exposed thermal pad soldered to PGND for enhanced thermal dissipation (θJC = 8°C/W); 0.65 mm pitch, 6.5 mm × 4.4 mm body size.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TB9051FTG and VNH7040AS, MP6612DGF-P offers superior analog current monitoring fidelity (±5%), lower conduction loss (45 mΩ LS), and charge-pump-enabled 100% duty cycle - making it optimal for compact, thermally constrained, and precision-torque industrial actuators.

Availability

MP6612DGF-P is available at Aetrix Electronics and suitable for industrial door locks, robotic joint actuators, HVAC blowers, and smart appliance solenoids requiring stable component supply across multi-year production cycles.

Supply support for MP6612DGF-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-efficiency power management ICs, with design focus on integration, thermal performance, and system-level reliability.

The MP6612D series belongs to MPS's motor driver product line, engineered specifically for compact, high-current brushed DC motor control in space-constrained industrial and automotive subsystems where analog current sensing and robust fault handling are mandatory.

FAQ

What is the difference between MP6612 and MP6612D variants?

The MP6612 uses IN1/IN2 logic inputs for H-bridge control, while MP6612D uses ENBL/DIR inputs - otherwise identical in electrical specs, package, and protection features. MP6612DGF-P is the TSSOP-20EP packaged version of the MP6612D, with top marking "MP6612D" and RoHS-compliant lead-free finish.

How is current limit configured on MP6612DGF-P?

Current limit is set by connecting a resistor between ISET and AGND: V_ITRIP-R = 1.5 V triggers regulation, and I_OUT = 1.5 V / R_ISET. For example, a 5 kΩ resistor yields 3 A trip current. Leaving ISET open disables regulation; grounding it fixes trip at 1.5 V regardless of load.

Does MP6612DGF-P require external bootstrap capacitors?

No - it integrates an internal charge pump (VCP pin) that generates gate-drive voltage for high-side N-MOSFETs. A single 1 μF ceramic capacitor from VCP to VIN is required, eliminating discrete bootstrap diodes and capacitors needed in conventional high-side drivers.

What happens to nFAULT during current regulation?

The nFAULT pin is inactive (high-impedance) during active cycle-by-cycle current regulation to avoid false fault reporting. It only asserts low during hard faults: over-current (exceeding OCP threshold), over-voltage, under-voltage lockout, or over-temperature shutdown.

Can MP6612DGF-P drive stepper motors?

Yes - its dual H-bridge topology (OUT1/OUT2 pair) can drive one winding of a bipolar stepper motor. For full 2-phase control, two MP6612DGF-P devices are required. The internal current regulation helps manage winding saturation and thermal rise during microstepping.

What PCB layout practices maximize thermal performance?

Use a 4-layer board with dedicated PGND plane, solder the exposed thermal pad directly to ≥4 thermal vias connected to inner ground planes, place 100 μF input capacitor and 1 μF VCP capacitor within 3 mm of respective pins, and route OUT1/OUT2 traces with ≥20 mil width and copper pours to minimize IR drop and heating.

Is MP6612DGF-P qualified for automotive applications?

MP6612DGF-P meets AEC-Q100 stress test requirements for temperature cycling and HTOL, but is not officially AEC-Q100 qualified. It is widely deployed in automotive HVAC and body electronics where its 40 V rating, OVP, and OTP provide robustness against load dump and thermal overload - subject to system-level validation.