Monolithic Power Systems Inc. MP6530GR-Z

Overview

MP6530GR-Z from Monolithic Power Systems is a three-phase BLDC motor pre-driver IC designed to control external N-channel MOSFET half-bridges in high-voltage motor drive systems. It operates from 5V to 60V input, delivers 0.8A source / 1A sink gate drive current per channel, supports 100% duty cycle via trickle-charged bootstrap, and integrates programmable short-circuit and over-current protection for industrial power tools and e-bikes.

For engineers reviewing the MP6530GR-Z datasheet, MP6530GR-Z pinout, MP6530GR-Z application, or MP6530GR-Z equivalent, this device is selected for robust gate driving in 24V–60V brushless motor systems requiring adjustable dead time, fault reporting, and thermal shutdown - especially where high-side drive reliability at full duty cycle is critical.

Technical Context

The MP6530GR-Z implements a regulated charge pump (11.5V typical VREG output) to sustain low-side gate drive across its full 5V–60V VIN range, while using bootstrap capacitors with internal trickle-charge circuitry to maintain high-side gate voltage during continuous conduction. Its VDS-based short-circuit detection compares MOSFET drain-source voltage against an externally set OCREF threshold (0.125V–2.4V), enabling precise current-limit tuning.

Dead-time control is implemented via a single external resistor (RDT) connected to the DT pin, yielding programmable delays from 30ns (DT grounded) to 6µs (DT floating); UVLO (3.3–4.5V rising threshold) and thermal shutdown (150°C) provide layered system-level protection. The nFAULT open-drain output latches low on any fault event and requires reset via nSLEEP or VIN UVLO recovery.

Key Specifications

Pinout & Package

MP6530GR-Z is housed in a thermally enhanced 4mm × 4mm QFN-28 package with exposed thermal pad (connected to GND). Pin numbering follows standard QFN top-view orientation, with pins 1–28 arranged counterclockwise starting from bottom-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 STSPIN32F0A and TB6605FTG, MP6530GR-Z uniquely combines 60V operation, VDS+shunt dual OCP, and true 100% duty-cycle high-side drive - making it the only option among the three qualified for high-reliability 48V–60V portable motor systems demanding both fault granularity and gate drive continuity.

Availability

MP6530GR-Z is available at Aetrix Electronics and suitable for power tools, e-bike controllers, and industrial pumps requiring stable component supply, extended temperature operation (−40°C to +125°C), and RoHS-compliant packaging.

Supply support for MP6530GR-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 design centers in the US, China, and Taiwan.

The MP6530 belongs to MPS's motor driver pre-driver product line, engineered specifically for efficient, reliable control of three-phase BLDC motors in battery-powered and industrial equipment where voltage range, protection integrity, and thermal robustness are critical.

FAQ

What is the minimum recommended bootstrap capacitor value for MP6530GR-Z?

The minimum bootstrap capacitance is calculated as C_BOOT > 8 × Q_G, where Q_G is the total gate charge (in nC) of the high-side MOSFET. For typical 20nC MOSFETs, use ≥0.16µF. MPS recommends 0.1–1µF X7R/X5R ceramics rated for ≥25V - values below 0.1µF risk insufficient charge hold-up during high-frequency PWM or 100% duty cycle.

Can MP6530GR-Z drive 60V-rated MOSFETs safely with a 60V supply?

Yes - MP6530GR-Z supports VIN up to 60V and has absolute maximum ratings of 70V for GHA/GHB/GHC and BSTA/BSTB/BSTC pins. However, transient overvoltage from motor inductance (e.g., during regenerative braking) must be clamped externally using TVS diodes or RC snubbers to stay within 70V, as specified in Absolute Maximum Ratings Table.

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

The internal trickle-charge pump supplies ~5µA to each bootstrap capacitor during high-side conduction, compensating for leakage currents that would otherwise discharge the capacitor. This maintains sufficient gate voltage (≥8V) on the high-side MOSFET even when the low-side FET is never turned on - a requirement for applications like electronic braking or static holding torque.

Is dead-time resistor (RDT) selection affected by PCB layout or MOSFET type?

Yes - longer gate trace inductance or slower MOSFET turn-off (high Q_gd) increases risk of shoot-through, requiring longer dead time. For layouts with >5cm gate traces or MOSFETs with >50ns turn-off time, increase RDT beyond the nominal 200kΩ (1µs) recommendation. Always validate with oscilloscope measurement of actual HS/LS overlap under worst-case load and temperature.

What happens when both short-circuit and over-current protections trigger simultaneously?

The MP6530GR-Z enters a single latched fault state regardless of which protection activates first. nFAULT goes low and all gate outputs disable. Recovery requires either cycling nSLEEP (pull low then high) or dropping VIN below UVLO threshold (≤3.3V) and reapplying - both methods reset internal latches and restart the power-up sequence.

Does MP6530GR-Z require external components for VREG stabilization?

Yes - a 10µF X7R/X5R ceramic capacitor rated for ≥16V must be placed between VREG and GND, as close as possible to the pin. This capacitor supplies peak gate drive current and stabilizes the charge pump regulator. Omitting it causes VREG droop, leading to weak gate drive and potential MOSFET overheating during high-frequency switching.

Can OCREF and LSS OCP be used concurrently?

No - connecting both triggers simultaneous fault detection with no prioritization. The datasheet specifies that OCREF and LSS OCP are mutually exclusive protection modes. To use LSS-based OCP, OCREF must be disabled by connecting it to VREG through a 100kΩ resistor; conversely, for VDS-based SC protection, LSS must be tied directly to MOSFET sources (not ground).