Monolithic Power Systems Inc. MP6510DM-LF-P

Overview

MP6510DM-LF-P from Monolithic Power Systems is a single-phase brushless DC motor driver IC with integrated high-side (370mΩ) and low-side (230mΩ) MOSFETs, 4.5V–16V input range, 1.2A continuous output current, and built-in Hall bias (1.2V), locked-rotor protection, and thermal shutdown. It drives CPU cooling fans in servers and desktop PCs using Hall-effect rotor position feedback.

For engineers reviewing the MP6510DM-LF-P datasheet, MP6510DM-LF-P pinout, MP6510DM-LF-P application, or MP6510DM-LF-P equivalent, key selection criteria include Hall-sensor-based current limiting (±50mV to ±150mV differential input), programmable minimum speed via RMI pin, FG/ RD open-collector status outputs, and TSSOP16 thermal performance (θJA = 90°C/W).

Technical Context

The MP6510 operates in four distinct modes-Minimum Speed, Variable Speed, Full-Speed, and Locked-Rotor Protection-determined by comparing VTH and RMI voltages against COSC oscillator ramp. Its Hall-input amplifier provides hysteresis and sets peak current proportional to (IN+ − IN−), enabling commutation-synchronized current limiting down to 3mV sensitivity.

Internal protection includes input over-voltage lockout (20V trip, 18V recovery), thermal shutdown (175°C trip, 155°C recovery), and automatic locked-rotor recovery using CT capacitor timing (ICT1 charge / ICT2 discharge). The 1.2V HB regulator powers external Hall sensors, while VREF supplies a stable 5.9V reference for external circuitry.

Key Specifications

Pinout & Package

The MP6510DM-LF-P is housed in a thermally enhanced 5.0mm × 6.4mm TSSOP16 package with exposed thermal pad (to be connected to P-GND). Pin 1 is marked by a dot; pins are numbered counterclockwise from top-left corner in top view.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar single-phase BLDC motor driver applications.

Compared with A4964KJPTR-T and LV8805UW, the MP6510DM-LF-P uniquely integrates Hall bias, locked-rotor auto-recovery, and analog minimum-speed control in a cost-optimized TSSOP16 package-making it optimal for high-volume, self-contained CPU/server fan modules.

Availability

MP6510DM-LF-P is available at Aetrix Electronics and suitable for CPU fan control, server chassis cooling, and industrial brushless fans requiring stable component supply, RoHS-compliant packaging, and long-term lifecycle support.

Supply support for MP6510DM-LF-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 analog and power ICs, with core expertise in DC/DC conversion, motor control, and LED drivers.

The MP6510 belongs to MPS's integrated BLDC motor driver product line, designed specifically for cost-sensitive, thermally constrained cooling applications where reliability, integration, and autonomous fault handling are critical.

FAQ

What Hall sensor types are compatible with the MP6510DM-LF-P?

The MP6510DM-LF-P supports bipolar latching Hall-effect sensors powered by its 1.2V HB output. Compatible devices include Allegro A3291, Melexis US5881, and Diodes Inc. AH9221-requiring ≤5mA supply current and 3mV minimum differential sensitivity. Sensors must be placed to generate clean ±50mV to ±150mV signals across commutation zones.

How does the locked-rotor protection recover automatically?

When rotor lock is detected, the CT capacitor charges via ICT1 (1.95μA typ) until VCTH (3.63V) is reached, triggering shutdown. ICT2 (0.16μA typ) then discharges CT to VCTL (1.73V), after which ICT1 recharges CT and PWM resumes. This cycle repeats until rotation resumes or power is cycled.

Can the MP6510DM-LF-P drive motors without a Hall sensor?

No-the MP6510DM-LF-P requires Hall sensor feedback for commutation timing and current limiting. It lacks sensorless BEMF detection circuitry. Removing the Hall sensor disables motor operation, as IN+ and IN− inputs are essential for both phase control and OCP scaling.

What is the maximum allowable input capacitance for stable OVP operation?

The input capacitor (CIN) must be ≥10µF to absorb commutation energy and prevent false OVP trips. Larger values (e.g., 22µF–47µF) improve margin for high-inductance motors but increase inrush current. Ceramic or low-ESR aluminum polymer types are recommended; avoid electrolytics with >100mΩ ESR.

Is the TSSOP16 thermal pad electrically connected internally?

Yes-the exposed thermal pad is internally connected to P-GND. It must be soldered to a dedicated P-GND copper pour with ≥4 thermal vias (0.3mm diameter) to achieve θJA = 90°C/W. Leaving the pad unconnected degrades thermal performance by >40% and risks thermal shutdown under 1.2A load.

Does the FG output reflect true motor RPM or electrical commutation frequency?

The FG output pulses once per electrical cycle, not per mechanical revolution. For a 2-pole motor, FG frequency equals RPM; for a 4-pole motor, FG frequency = 2×RPM. System firmware must scale FG counts based on motor pole count to derive accurate mechanical speed.

What happens if the RMI pin is left floating?

Leaving RMI floating causes unpredictable minimum speed behavior due to leakage-induced voltage. The datasheet specifies connecting RMI to VTH if unused-this forces minimum speed mode with VTH defining the lower bound. A 10kΩ pull-down to S-GND is an acceptable alternative for fixed-minimum operation.