Monolithic Power Systems Inc. MP6652GJL-0000-P

Overview

MP6652GJL-0000-P from Monolithic Power Systems is a single-phase brushless DC (BLDC) motor driver IC with integrated Hall-effect sensor, power MOSFETs (850 mΩ total R_DS(ON)), and configurable speed curve control. It operates from 3V to 18V input, delivers fixed 27 kHz switching frequency, and supports PWM-based speed regulation (1–100 kHz input range) for cooling fan applications such as CPU/GPU thermal management.

For engineers reviewing the MP6652GJL-0000-P datasheet, MP6652GJL-0000-P pinout, MP6652GJL-0000-P application, or MP6652GJL-0000-P equivalent, key selection criteria include integrated Hall sensing, rotor lock auto-recovery, FG/RD dual-mode speed/fault reporting, soft-on/off commutation angle configurability (up to 90°), and TSOT23-6-L package compatibility with space-constrained fan modules.

Technical Context

The MP6652 implements closed-loop commutation using an embedded Hall sensor to detect rotor position, generating HA_OUT with programmable phase shift (HAL_ANG up to 45°) for precise timing control of OUT1/OUT2 H-bridge outputs. Its digital speed curve engine uses eight user-configurable duty points (D1–D8) mapped across 12.5%–100% input PWM range to define non-linear fan response profiles.

Protection logic integrates real-time monitoring: UVLO (2.5 V rising threshold), OVP (19.1 V typical), thermal shutdown (170°C), rotor lock detection (0.6 s timeout), and over-current protection (1.3 A HS-FET threshold). All protections feature auto-recovery, and FG/RD output supports selectable frequency multiplication (0.5x/1x/2x Hall) or rotor lock indication mode.

Key Specifications

Pinout & Package

MP6652GJL-0000-P is housed in a thermally enhanced TSOT23-6-L package (2.9 mm × 1.6 mm × 0.85 mm), optimized for fan module integration with exposed pad for improved heat dissipation. The Hall sensor is positioned at X=800 µm, Y=783 µm, Z=80 µm relative to package corner.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MP6652GJL-0000-P, the GJS variant offers identical electrical performance in a mechanically distinct package for tighter height constraints, while the AEC1 version adds automotive qualification and robustness at the cost of non-interchangeable OTP programming and higher unit cost.

Availability

MP6652GJL-0000-P is available at Aetrix Electronics and suitable for CPU/GPU thermal management, server chassis cooling, and industrial embedded fan modules requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for MP6652GJL-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 design expertise in DC-DC converters, motor drivers, and battery management solutions.

The MP6652 product line targets intelligent thermal management systems, integrating Hall sensing, programmable speed curves, and comprehensive protection into compact packages for next-generation cooling fan modules.

FAQ

What is the function of the FG/RD pin, and how is its mode selected?

The FG/RD pin serves dual functions: rotational speed indication (FG) or rotor lock fault reporting (RD). Mode selection is controlled by the FGRD[1:0] bits in register 0Eh: 00 = 1x Hall frequency, 01 = 0.5x, 10 = 2x, 11 = RD mode. In RD mode, the pin asserts low (or high, per RD_HL bit) when no Hall edge is detected for 0.6 s, indicating rotor stall.

How does the MP6652 handle motor startup under varying load conditions?

The MP6652 implements configurable soft-on commutation (SON_ANG register, up to 90°) and programmable starting duty cycle (DIN_MIN). During startup, it gradually ramps output duty from 0% to target level while maintaining one output low, minimizing torque shock and ensuring reliable rotation initiation even with high-inertia or viscous-loaded fans.

Can the speed curve be customized without reprogramming the device each time?

Yes. The 8-point speed curve (D1–D8 registers) is stored in non-volatile memory (NVM) during factory programming or via MPS Fan Driver GUI software. Once configured, the curve persists across power cycles and requires no runtime MCU intervention, enabling true "set-and-forget" fan behavior tailored to thermal profiles.

What protection features activate during input over-voltage events?

When VCC exceeds the OVP threshold (19.1 V typical), the MP6652 immediately turns on both low-side MOSFETs to short the motor winding and dissipate energy, clamping the input rail. Once VCC drops below 18 V, normal operation resumes automatically without requiring reset or external intervention.

Is external current sensing required for over-current protection?

No. Over-current protection (OCP) is implemented internally using MOSFET R_DS(ON) voltage sensing. When high-side current exceeds the threshold (1.3 A typical, set by OCP_SEL bits), the HS-FET shuts off after blanking time and resumes in the next switching cycle-no external sense resistor or amplifier is needed.

How does the Hall sensor position affect magnet placement in the fan assembly?

The Hall sensor is located at precise coordinates (X=800 µm, Y=783 µm, Z=80 µm) in the TSOT23-6-L package. Magnet placement must align radially with this point to ensure clean Hall signal edges; misalignment causes commutation jitter or startup failure. Refer to Figure 6 in the datasheet for mechanical layout guidance.