Monolithic Power Systems Inc. MP6532GF-P

Overview

MP6532GF-P from Monolithic Power Systems is a three-phase brushless DC motor pre-driver IC designed to control six external N-channel MOSFETs in half-bridge configurations. It operates from 5V to 60V input, integrates 120° Hall-sensor commutation logic, supports 100% duty cycle via trickle-charged bootstrap, and delivers 0.8A source / 1A sink gate drive. Used in power tools like impact drivers where robust over-current protection and thermal shutdown are critical.

For engineers reviewing the MP6532GF-P datasheet, MP6532GF-P pinout, MP6532GF-P application, or MP6532GF-P equivalent, key selection considerations include its 5–60V operating range, programmable short-circuit protection threshold (0.8–2.62V), adjustable dead time (30ns–6µs), integrated VREG regulator (10–12.8V), and TSSOP-28 EP package with exposed thermal pad.

Technical Context

The MP6532GF-P implements a regulated charge pump to generate ~11.5V at VREG for low-side gate drive while using bootstrap capacitors-maintained by an internal 5µA trickle-charge circuit-for high-side drive, enabling continuous conduction without voltage collapse. Its Hall-input commutation engine decodes three 120°-spaced sensor signals to sequence phase activation.

Protection architecture includes dual over-current mechanisms: VDS-based short-circuit detection referenced to OCREF (±0.2V accuracy) and LSS-shunt-based OCP with 53–80µs fixed off-time, plus UVLO (3.3–4.5V rising threshold), thermal shutdown (150°C), and shoot-through prevention via resistor-programmable dead time (RDT).

Key Specifications

Pinout & Package

TSSOP-28 EP package (9.7mm × 6.4mm) with exposed thermal pad connected to GND for enhanced power dissipation (θJA = 32°C/W, θJC = 6°C/W). Pin numbering follows standard TSSOP layout with pin 1 at top-left corner.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MP6532GR-Z, the MP6532GF-P offers superior thermal performance (3.9W vs. 2.9W at TA=25°C) due to its exposed pad TSSOP package, while DRV8313PWPR trades integrated Hall logic for MCU-dependent flexibility and higher voltage tolerance-making GF-P optimal for cost-sensitive, firmware-light BLDC systems.

Availability

MP6532GF-P is available at Aetrix Electronics and suitable for power drills, impact drivers, e-bikes, and industrial pumps requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.

Supply support for MP6532GF-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 focus on efficiency, integration, and thermal robustness.

The MP6532 belongs to MPS's motor driver pre-driver product line, engineered specifically for cost-effective, Hall-sensor-based three-phase BLDC control in portable and industrial motion systems.

FAQ

What is the maximum continuous power dissipation for MP6532GF-P at 25°C ambient?

The MP6532GF-P in TSSOP-28 EP package has a continuous power dissipation limit of 3.9W at TA = +25°C, based on its θJA of 32°C/W and maximum junction temperature of 150°C. This assumes proper PCB layout with thermal vias under the exposed pad and adequate copper area.

How does the trickle-charge circuit enable 100% duty cycle operation?

The internal 5µA trickle-charge pump continuously replenishes charge lost from bootstrap capacitors due to leakage and gate drive loading, maintaining sufficient gate voltage on high-side MOSFETs even when low-side FETs remain off indefinitely-enabling zero-speed torque hold in e-bike or actuator applications.

Can MP6532GF-P operate without Hall sensors?

No-MP6532GF-P relies exclusively on three Hall sensor inputs (HA, HB, HC) for commutation sequencing; it does not support sensorless BEMF detection or external step/direction interfaces. Omitting Hall sensors disables motor rotation entirely.

What is the purpose of the LSS pin, and how is current limit set?

LSS monitors voltage across an external shunt resistor connected between low-side MOSFET sources and ground. When LSS voltage exceeds 0.4–0.6V (typical), the corresponding high-side FET turns off and low-side remains on for 53–80µs, limiting peak motor current during stall or overload conditions.

Is dead time fixed or configurable-and how is it adjusted?

Dead time is fully configurable via an external resistor (RDT) tied from DT pin to GND. Using Equation tDEAD(ns) = 3.7 × R(kΩ), a 200kΩ resistor yields ~0.74µs; leaving DT open gives ~6µs; tying to GND forces minimum 30ns. This allows optimization for switching frequency and MOSFET characteristics.

Does MP6532GF-P support regenerative braking?

MP6532GF-P does not actively control regenerative braking; it supports only motoring and dynamic braking (via nBRAKE activating all low-side FETs). Regeneration requires external circuitry (e.g., bidirectional DC-DC converter) and is not managed by the pre-driver's logic or protection features.

What is the role of the OCREF pin in short-circuit protection?

OCREF sets the VDS threshold for short-circuit detection: if any MOSFET's drain-to-source voltage exceeds the OCREF voltage (0.125–2.4V), the MP6532 immediately disables all gate outputs and asserts nFAULT. This allows precise matching to MOSFET RDS(on) and expected load current.