Monolithic Power Systems Inc. MP6612GF-P

Overview

MP6612GF-P from Monolithic Power Systems is a 40V, 5A H-bridge DC motor driver IC with integrated N-channel MOSFETs, internal charge pump, current-sense output (VISEN), cycle-by-cycle current regulation, and comprehensive protection (OCP/OVP/UVLO/OTP). It drives brushed DC motors, stepper windings, or solenoids in industrial actuators and automotive door locks.

For engineers reviewing the MP6612GF-P datasheet, MP6612GF-P pinout, MP6612GF-P application, or MP6612GF-P equivalent, key selection criteria include its 70mΩ HS-FET / 45mΩ LS-FET R_DS(ON), 10% current-sense accuracy, TSSOP-20EP thermal pad package, configurable current limit via ISET resistor, and dual control modes (IN1/IN2 or ENBL/DIR).

Technical Context

The MP6612GF-P implements a full N-channel H-bridge with an internal charge pump enabling 100% duty-cycle operation without external high-side gate drivers. Its constant-off-time current regulation uses VITRIP-R = 1.5V at the ISET pin to trigger slow-decay braking when load current exceeds the programmed threshold.

Protection logic integrates independent monitoring of VIN (OVP at 46.5V, UVLO at 3.8V), die temperature (OTP at 165°C), and bidirectional output current (OCP thresholds of 15A or 20A depending on OC_ADJ state), with automatic 4ms retry after fault shutdown.

Key Specifications

Pinout & Package

TSSOP-20EP package with exposed thermal pad soldered to PGND for enhanced thermal dissipation (θ_JA = 40°C/W on 4-layer PCB). Pin numbering follows JEDEC MO-153 standard.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TB6612FNG and VNH7040AS, the MP6612GF-P uniquely combines 5A drive capability, integrated current sense, charge-pump-enabled 100% duty cycle, and TSSOP-20EP thermal efficiency - making it optimal for space-constrained, battery-sensitive, and current-feedback-dependent motor control.

Availability

MP6612GF-P is available at Aetrix Electronics and suitable for industrial actuators, automotive door locks, medical infusion pumps, and robotics joint controllers requiring stable component supply across production lifecycles.

Supply support for MP6612GF-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 core expertise in DC-DC converters, motor drivers, and LED drivers.

The MP6612 product line targets compact, thermally efficient H-bridge solutions for battery-powered and 12–40V industrial motion control, emphasizing integration, protection, and ease of use in space-constrained designs.

FAQ

What is the difference between MP6612GF-P and MP6612DGF-P?

The MP6612GF-P uses IN1/IN2 logic inputs for H-bridge control, while MP6612DGF-P uses ENBL/DIR inputs - otherwise identical in electrical specs, package, and protection features. The GF suffix denotes TSSOP-20EP packaging with exposed thermal pad, and -P indicates tape-and-reel packaging per MPS ordering conventions.

How is current limit configured on MP6612GF-P?

Current limit is set by connecting a resistor between ISET (Pin 10) and AGND. With 100μA/A sourced into the resistor, a 5kΩ resistor yields 0.5V/A scaling and triggers regulation at 3A (1.5V/0.5V/A). Leaving ISET open or grounding OC_ADJ selects 15A or 20A OCP thresholds respectively.

Can MP6612GF-P drive a stepper motor?

Yes - the MP6612GF-P can drive one bipolar stepper motor winding pair (full-bridge per phase). Its 5A rating supports up to NEMA-17 size steppers at moderate speeds; however, dedicated stepper drivers offer better microstepping and phase synchronization for multi-axis precision motion.

What thermal design practices are required for 5A continuous operation?

For 5A continuous current, use a 4-layer PCB with ≥2 oz copper on PGND/VIN/OUT layers, solder the exposed thermal pad to a solid PGND plane, place ≥8 thermal vias under the pad, and maintain ≥10mm² copper area per amp. Thermal resistance must stay below 40°C/W to avoid OTP shutdown at 125°C ambient.

Does MP6612GF-P support PWM speed control?

Yes - apply PWM signals to IN1/IN2 (or ENBL/DIR) at frequencies up to 100kHz. The internal gate drivers support fast switching (tRISE/tFALL <150ns), and cycle-by-cycle current regulation maintains torque stability even at low duty cycles without external current sensing.

Is the VISEN output ratiometric to supply voltage?

No - VISEN is ratiometric to load current only, not VIN. Its scaling (e.g., 0.5V/A) remains stable across the 4–40V input range because the internal current-sense amplifier references a trimmed bandgap voltage, not VIN, ensuring consistent accuracy in variable-battery applications.

What happens to nFAULT during current regulation?

The nFAULT pin is inactive during active current regulation - it only asserts low during hard faults (OCP, OVP, UVLO, OTP). This prevents false fault reporting during normal regulated braking or startup current surges, allowing clean system-level fault handling without interrupt flooding.