Monolithic Power Systems Inc. MP6616GD-0000-P

Overview

MP6616GD-0000-P from Monolithic Power Systems is a single-phase brushless DC (BLDC) motor driver IC with integrated Hall-effect sensor, embedded power MOSFETs, and closed-loop/open-loop speed control. It delivers 2A continuous output current across 3.3V–18V input range, supports up to 40,000rpm configurable speed, and features 27kHz fixed switching frequency and 45° configurable soft commutation angle. It is deployed in server cooling fans requiring precise speed regulation and rotor lock protection.

For engineers reviewing the MP6616GD-0000-P datasheet, MP6616GD-0000-P pinout, MP6616GD-0000-P application, or MP6616GD-0000-P equivalent, key selection considerations include Hall offset angle configurability (±45°), cycle-by-cycle OCP with four-step current limit (up to 4A), FG/RD open-drain rotational detection, and QFN-10 package thermal performance (θJA = 65°C/W).

Technical Context

The MP6616GD-0000-P implements a Hall-sensor-based commutation controller with programmable soft on/off angles (0–45°), dynamic Hall offset compensation across speed zones, and dual-mode speed regulation-closed-loop for accuracy (±0.5% RPM error at 100% duty) and mixed-mode for wide-range stability. Its internal oscillator uses an external 20kΩ resistor to fix fSW at 27kHz, synchronizing PWM timing, Hall sampling, and integrator updates.

Protection architecture integrates five independent fault responses: UVLO (3.0V rising threshold), OVP (19V rising), locked rotor detection (0.6s timeout with auto-recovery), thermal shutdown (160°C trip, 40°C hysteresis), and cycle-by-cycle OCP with blanking time (~1µs). All protections feature auto-recovery except thermal shutdown, which holds LS-FET on until junction cools to ~120°C.

Key Specifications

Pinout & Package

MP6616GD-0000-P is housed in a thermally enhanced QFN-10 (2mm × 3mm, 0.4mm pitch) package with exposed thermal pad. The package supports reflow soldering per JEDEC J-STD-020 and achieves θJA = 65°C/W on a 4-layer PCB.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MP6616GD-0000-P, MP6612GD-Z increases design complexity and component count while losing Hall integration and closed-loop accuracy, whereas TB6612FNG lacks essential fan-specific features like FG feedback, soft commutation, and rotor lock protection-making neither a functional substitute without major system redesign.

Availability

MP6616GD-0000-P is available at Aetrix Electronics and suitable for 1U/2U server fan control, CPU thermal management, and GPU/ASIC cooling modules requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for MP6616GD-0000-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 over two decades of expertise in DC/DC converters, motor drivers, and battery management solutions.

The MP6616 product line targets intelligent cooling systems, delivering integrated Hall sensing, programmable commutation, and multi-level protection specifically for high-reliability server and computing fan applications.

FAQ

What is the function of the TST pin on MP6616GD-0000-P?

The TST pin enables test mode for programming internal OTP registers. During normal operation, it must be hard-wired to GND. If left floating or pulled high, the device enters register read/write mode, disabling motor control. No external pull-up or pull-down is required beyond the GND connection.

Can MP6616GD-0000-P drive a three-phase BLDC motor?

No. MP6616GD-0000-P is strictly a single-phase BLDC driver with one H-bridge (OUT1/OUT2) and one embedded Hall sensor. It cannot commutate three-phase motors, which require six-step sequencing and at least two or three Hall inputs. It is designed exclusively for single-coil, two-wire fan motors.

How does the FG/RD pin operate in rotor lock detection mode?

When FGRD_SEL = 11, FG/RD becomes a rotor lock indicator (RD). During lock detection (no Hall edge for 0.6s), RD outputs a steady low (if RD_H_L = 0) or high (if RD_H_L = 1) signal. This open-drain output requires an external pull-up resistor and provides immediate fault signaling to the host controller without polling.

What is the purpose of the OSC resistor, and what tolerance is required?

The OSC pin connects to a 20kΩ resistor to GND to set the internal 27kHz oscillator frequency. A resistor with ±1% tolerance or better is mandatory; wider tolerances cause measurable deviation in PWM timing, Hall sampling, and OCP blanking, degrading speed accuracy and fault response consistency.

Does MP6616GD-0000-P support analog voltage speed control?

No. Speed control is exclusively via PWM signal on the PWM pin (1–100kHz). There is no analog input (e.g., 0–5V DAC interface) or I²C/SPI speed command interface. The device interprets PWM duty cycle as a direct RPM reference in closed-loop mode or as a drive strength command in open-loop mode.

What thermal derating applies to the 2A output rating?

The 2A continuous rating assumes θJA = 65°C/W on a 4-layer PCB with proper copper pour and thermal vias under TA = 25°C. At 85°C ambient, maximum continuous current drops to ~1.4A due to thermal limits (TJ ≤ 125°C). Derating curves are provided in Figure 7 of the datasheet.

Is the embedded Hall sensor calibrated at factory, or does it require end-user trimming?

The Hall sensor is factory-trimmed for 2mT sensitivity and includes digital registers (HAL_ANG1–3, HAL_FLAG) for system-level offset calibration. No external trimming components are needed; users configure Hall angle compensation per motor magnet position via OTP registers during production programming.