Monolithic Power Systems Inc. MP6652GJL-0000-Z

Overview

MP6652GJL-0000-Z 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). Used in CPU/GPU cooling fans for precise rotational speed control and rotor lock detection.

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

Technical Context

The MP6652 implements closed-loop BLDC commutation using an on-die Hall sensor to detect rotor position, generating HA_OUT with programmable phase offset (HAL_ANG, HAL_FLAG) for timing control of OUT1/OUT2 H-bridge outputs. Speed is regulated via external PWM duty cycle mapping to internal 8-point configurable output curve (D1–D8 registers).

Protection logic includes auto-recovering UVLO (2.5 V rising threshold), OVP (19.1 V typical), rotor lock detection (0.6 s timeout), and thermal shutdown (170 °C). The FG/RD pin serves as open-drain output for either 0.5×/1×/2× Hall-frequency tachometer signal or active-low rotor lock flag, selected by FGRD register bits.

Key Specifications

Pinout & Package

MP6652GJL-0000-Z uses the TSOT23-6-L package: 6-pin, 1.6 mm × 2.9 mm body, 0.95 mm height, exposed pad not electrically connected. Pin 1 (GND) is bottom-left when marking side faces up and notch/pin 1 indicator is leftmost.

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-Z, MP6651GJL-0000-Z trades integration for layout flexibility, while A89335KLPTR-T sacrifices configurability and efficiency for price - making MP6652 optimal for thermally demanding, acoustically sensitive, and space-constrained fan designs.

Availability

MP6652GJL-0000-Z is available at Aetrix Electronics and suitable for CPU/GPU fan control, server chassis cooling, and industrial embedded fan applications requiring stable component supply, long-lifecycle support, and consistent parametric performance across production batches.

Supply support for MP6652GJL-0000-Z 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, including DC/DC converters, motor drivers, and LED controllers, with design centers in the US, China, and Taiwan.

The MP6652 belongs to MPS's fan driver product line, engineered specifically for compact, intelligent cooling solutions in computing and industrial equipment where integration, reliability, and acoustic performance are critical.

FAQ

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

The FG/RD pin is a multifunction open-drain output that can be configured as either a rotational speed indicator (FG) or a rotor lock fault flag (RD). Its mode is selected by the FGRD[1:0] bits in register 0Eh: 00 = 1× Hall frequency, 01 = 0.5×, 10 = 2×, 11 = RD active-low. External 4.7 kΩ pull-up to VCC is required for proper logic-level operation in all modes.

Does MP6652GJL-0000-Z require external MOSFETs or Hall sensors?

No. MP6652GJL-0000-Z integrates both power MOSFETs (850 mΩ total R_DS(ON)) and a Hall-effect sensor within the TSOT23-6-L package. This eliminates the need for external switching devices or position sensing components, reducing bill-of-materials count and PCB footprint in fan module designs.

How is the speed curve configured, and what is the default behavior?

The speed curve is defined by eight 8-bit registers (D1–D8) that map input PWM duty points (12.5% to 100%) to corresponding output duty cycles. Default values set a linear 1:1 mapping (e.g., D1 = 0x20 = 12.5%, D8 = 0xFF ≈ 100%). Configuration is performed via I²C-like test mode and stored in OTP memory for production use.

What protection features are implemented, and do they auto-recover?

MP6652GJL-0000-Z includes auto-recovering input UVLO (2.5 V), OVP (19.1 V), thermal shutdown (170 °C), and rotor lock detection (0.6 s timeout). All protections disable outputs and resume normal operation once fault conditions clear - no external reset or power cycle is required.

What is the significance of the "GJL" suffix in MP6652GJL-0000-Z?

The "GJL" suffix denotes the TSOT23-6-L package variant per MPS ordering nomenclature. "GJL" specifically indicates the leaded, non-slim version of the TSOT23-6 package (vs. "GJS" for TSOT23-6-SL), with distinct pin 1 location and thermal pad geometry - critical for correct PCB land pattern and thermal design.

Can MP6652GJL-0000-Z drive motors other than cooling fans?

MP6652GJL-0000-Z is optimized for single-phase BLDC cooling fans (e.g., 8025 axial types) with rated currents ≤1.3 A. While it may operate other small single-phase BLDC loads, its Hall sensor placement, speed curve architecture, and protection thresholds are tuned for fan-specific dynamics - not general-purpose motor control.

What is the recommended input capacitor value and type?

MPS recommends a 1–10 μF X7R ceramic capacitor placed adjacent to VCC and GND pins. For high-inertia or high-current fans, add a bulk electrolytic capacitor (e.g., 47–100 μF) in parallel. Capacitor voltage rating must exceed maximum VIN (18 V) by ≥50% to maintain effective capacitance under bias.