Monolithic Power Systems Inc. MP6530GF-Z

Overview

MP6530GF-Z 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 a regulated charge pump (11.5V VREG output), supports 100% duty cycle via trickle-charged bootstrap circuitry, and delivers 0.8A source / 1A sink gate drive current - used in cordless power tools like impact drivers and e-bike motor controllers.

For engineers reviewing the MP6530GF-Z datasheet, MP6530GF-Z pinout, MP6530GF-Z application, or MP6530GF-Z equivalent, key selection criteria include its adjustable dead-time control (30ns–6µs), programmable short-circuit protection via OCREF input, LSS-based over-current sensing, thermal shutdown at 150°C, and TSSOP-28 EP package with exposed thermal pad for industrial motor drive thermal management.

Technical Context

The MP6530GF-Z implements a three-phase gate driver architecture with independent high-side (GHA/GHB/GHC) and low-side (GLA/GLB/GLC) outputs per phase, driven by PWM inputs (PWMA/PWMB/PWMC) and enable controls (ENA/ENB/ENC). Its internal charge pump generates a stable ~11.5V VREG supply for low-side drivers while bootstrap circuits (BSTA/BSTB/BSTC) - augmented by a 5µA trickle-charge current - sustain high-side gate voltage during continuous conduction.

Protection logic includes dual-path fault detection: VDS-sensing short-circuit protection triggered when MOSFET drain-source voltage exceeds OCREF (0.125V–2.4V range), and LSS-referenced over-current protection with 0.5V threshold; both initiate latched fault shutdown with open-drain nFAULT assertion. Dead time is set externally via DT pin resistor (e.g., 200kΩ → 0.74µs), and UVLO activates at VIN < 3.9V with 200mV hysteresis.

Key Specifications

Pinout & Package

TSSOP-28 EP package (9.7mm × 6.4mm) with exposed thermal pad connected to GND - optimized for heat dissipation in compact motor drive PCBs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STSPIN32F0A and DRV8305PWP, MP6530GF-Z offers lower BOM count and faster time-to-market for fixed-function BLDC drives, trading programmability for proven analog reliability and reduced validation scope in cost-sensitive power tool designs.

Availability

MP6530GF-Z is available at Aetrix Electronics and suitable for cordless power tools, e-bike motor controllers, industrial fans, and HVAC blowers requiring stable component supply across high-volume production ramps.

Supply support for MP6530GF-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-performance analog and power ICs, with core expertise in DC/DC conversion, motor control, and LED drivers.

The MP6530 product line targets cost-sensitive, thermally constrained three-phase BLDC motor applications in portable and industrial equipment - emphasizing robust gate drive, analog configurability, and simplified external component count.

FAQ

What is the maximum continuous power dissipation for MP6530GF-Z in TSSOP-28 EP package?

The MP6530GF-Z has a continuous power dissipation rating of 3.9W at +25°C ambient, enabled by its exposed thermal pad connected to GND. This value assumes proper PCB copper area (≥4 cm²) and is derived from θ_JA = 32°C/W and T_J(MAX) = 150°C. Derating is required above +25°C ambient per the thermal resistance curve.

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

The internal trickle-charge circuit supplies ~5µA to each bootstrap capacitor (BSTA/BSTB/BSTC) during high-side conduction, compensating for leakage currents that would otherwise discharge the capacitor. This maintains sufficient gate voltage to keep the high-side MOSFET fully enhanced even when the low-side switch remains off indefinitely.

Can MP6530GF-Z drive 100V-rated MOSFETs safely?

Yes - the MP6530GF-Z supports external MOSFETs with V_DS ratings up to 100V, provided VIN stays within its 5V–60V operating range and absolute maximum of 65V. The device's BSTx pins tolerate up to 70V, and GHA/GHB/GHC pins handle 70V continuously (8V transient), making it compatible with common 60V–100V logic-level N-MOSFETs.

What happens when both short-circuit and over-current faults occur simultaneously?

The MP6530GF-Z latches off all gate outputs and asserts nFAULT low upon detection of either fault type. Since both protections trigger identical latched shutdown behavior and share the same reset mechanism (nSLEEP toggle or VIN UVLO recovery), simultaneous occurrence results in a single unified fault state - no priority hierarchy or masking is implemented.

Is external bootstrap diode required for MP6530GF-Z?

No - the MP6530GF-Z integrates internal bootstrap diodes (VF_BOOT = 0.9V at 10mA). External diodes are unnecessary and not recommended, as they would interfere with the internal trickle-charge path and risk reverse-biasing the internal structure during high-frequency switching.

How is dead time adjusted without using the DT pin resistor?

Leaving the DT pin open yields a nominal 6µs dead time; tying DT directly to GND selects the minimum 30ns. No other passive or active methods exist - the DT pin does not accept voltage or current inputs, and dead time cannot be modified via software, registers, or other pins.

Does MP6530GF-Z support sensorless BLDC commutation?

Yes - the MP6530GF-Z provides the gate drive capability and timing flexibility (via PWM/enable inputs) required for sensorless commutation. However, it does not include integrated back-EMF sensing or algorithmic logic; those functions must be implemented externally in the host MCU or dedicated controller.