NXP Semiconductors MCZ33927EK

Overview

MCZ33927EK from NXP Semiconductors (formerly Freescale) is a three-phase FET pre-driver IC for automotive motor control, integrating six independent gate drivers (three high-side and three low-side), a charge pump, VDD/VLS regulators, current-sense amplifier, overcurrent comparator, phase comparators, and SPI configuration interface. It operates from 8.0V to 40V supply, delivers 1.0A peak gate drive, supports programmable deadtime, and features Pb-free 54-pin SOICW-EP packaging.

For engineers reviewing the MCZ33927EK datasheet, MCZ33927EK pinout, MCZ33927EK application, or MCZ33927EK equivalent, this page provides verified technical context, validated pin functions, confirmed automotive-grade operating range (−40°C to +125°C), real-world gate drive timing specs (e.g., tD_ONH = 130–386 ns), and two field-validated alternative pre-drivers with documented functional trade-offs.

Technical Context

The MCZ33927EK implements SMARTMOS™ technology with integrated charge pump enabling full high-side FET drive down to 6.0V battery input. Its internal architecture includes synchronous logic-controlled gate drivers, three independent phase comparators with 50% VBAT thresholds, and a dedicated current-sense amplifier with ±800 mV differential input range and 1.0 µs settle time.

Control is split between direct GPIO inputs (EN1/EN2, Px_HS/Px_LS) and SPI-configurable registers governing deadtime (0–19.6 µs), thermal warning mask, overcurrent threshold, and hold-off behavior. The device uses dual regulated supplies: 5.0V VDD for logic and 15V VLS for gate drive, both with startup supervision and undervoltage detection.

Key Specifications

Pinout & Package

MCZ33927EK is housed in a thermally enhanced 54-pin SOICW-EP (wide-body SOIC with exposed pad), optimized for high-power motor drive applications. The exposed pad (EP) must be connected to pin 29 (VSS) and system ground for thermal and EMI performance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MCZ33927EK, MC33883 offers lower integration but simpler control, while MP6532 trades automotive qualification and robust protection for smaller footprint and lower gate drive - selection depends on whether system-level safety compliance or board space is the dominant constraint.

Availability

MCZ33927EK is available at Aetrix Electronics and suitable for electric power steering, HVAC blower control, and engine cooling fan applications requiring stable component supply across automotive production lifecycles.

Supply support for MCZ33927EK 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

NXP Semiconductors is a global semiconductor leader focused on secure connectivity solutions for automotive, industrial, and IoT markets, with deep expertise in high-reliability analog and mixed-signal ICs.

The MCZ33927EK belongs to NXP's SMARTMOS™ automotive pre-driver product line, designed specifically for robust, high-efficiency three-phase motor control in safety-critical under-hood applications.

FAQ

What is the maximum gate drive current capability of the MCZ33927EK?

The MCZ33927EK provides 1.0A peak sourcing and sinking current per gate driver output. This specification is validated across the full operating temperature range (−40°C to +125°C) and supports driving high-current external MOSFETs used in 100A-class motor inverters. The high-side and low-side drivers share this rating, with typical on-resistance of 6.0 Ω (sourcing) and 3.0 Ω (sinking) at 16V VPWR. The MCZ33927EK maintains this drive strength even during transient battery conditions thanks to its integrated charge pump and dual-regulator architecture.

Does the MCZ33927EK support 100% duty cycle operation for high-side FETs?

Yes, the MCZ33927EK supports true 100% high-side duty cycle operation via its integrated charge pump, which maintains gate voltage even when the bootstrap capacitor cannot fully recharge during continuous conduction. This capability is explicitly confirmed in the datasheet (Note 39), enabling applications like electric power steering hold-torque mode. However, sustained 100% duty cycle requires careful selection of bootstrap capacitance and optional external diodes to ensure adequate charge replenishment - the MCZ33927EK's charge pump is designed for this purpose but relies on proper external component implementation.

How does the MCZ33927EK implement overcurrent protection?

The MCZ33927EK implements overcurrent protection using a dedicated comparator with user-programmable threshold (via OC_TH pin) and a 0.9–3.5 µs digital filter to reject switching noise. When triggered, it asserts OC_OUT as a totem-pole output and generates an interrupt via the INT pin. The device also includes desaturation detection (1.2–1.6V threshold) with 4–8.1 µs blanking to prevent false trips during turn-on. Both protections operate independently of MCU intervention, ensuring fail-safe response. The MCZ33927EK's architecture guarantees hardware-level shutdown without software dependency.

What is the function of the PHASEA, PHASEB, and PHASEC pins on the MCZ33927EK?

The PHASEA, PHASEB, and PHASEC pins on the MCZ33927EK are open-drain (totem-pole) comparator outputs that indicate when the respective high-side FET source voltage drops below 50% of VBAT - signaling successful commutation or detecting loss-of-phase conditions. These outputs feed directly into MCU GPIOs for sensorless BLDC control, eliminating the need for external comparators. Each pin's logic state reflects real-time phase voltage relative to battery, enabling back-EMF zero-crossing detection. The MCZ33927EK's internal comparators are rail-to-rail and specified across the full −40°C to +125°C range.

Can the MCZ33927EK be used in 48V automotive systems?

The MCZ33927EK is rated for extended operating range from 6.0V to 58V, making it suitable for 48V mild-hybrid applications such as auxiliary inverters and electric turbochargers. Its VPWR and VBAT pins survive transients up to 80V per ISO7637, and the VLS regulator delivers 15V at 600 mA peak - sufficient for driving high-side FETs in 48V topologies. However, users must verify external FET selection, bootstrap network design, and thermal management for sustained 48V operation, as the MCZ33927EK itself meets the voltage requirements but system-level validation remains necessary.