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NXP Semiconductors MCZ33937AEK
- Part No.:
- MCZ33937AEK
- Manufacturer:
- NXP Semiconductors
- Category:
- Motor Drivers, Controllers
- Package:
- 54-SSOP (0.295", 7.50mm Width) Exposed Pad
- Datasheet:
-
MCZ33937AEK.pdf
- Description:
- IC MOTOR DRIVER 6V-58V 54SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,226
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Product details
Overview
MCZ33937AEK from NXP Semiconductors is a three-phase FET pre-driver IC designed for automotive motor control, integrating six gate drivers (three high-side and three low-side), SPI configuration, overcurrent sensing, and AEC-Q100 Grade 1 qualification. It operates from 6.0 V to 58 V supply, delivers up to 2.5 A peak gate drive current per channel, and supports 12 V/42 V systems in cooling fans, water pumps, and electric power steering.
For engineers reviewing the MCZ33937AEK datasheet, MCZ33937AEK pinout, MCZ33937AEK application, or MCZ33937AEK equivalent, this page provides verified technical context, validated pin functions, confirmed automotive-grade protection features, and real-world motor control use cases - all grounded in NXP's Rev. 14 product data sheet.
Technical Context
The MCZ33937AEK implements independent high-side and low-side driver stages per phase, each with dedicated bootstrap inputs (PA_BOOT/PB_BOOT/PC_BOOT), source-sense pins (PA_HS_S/PB_HS_S/PC_HS_S), and gate outputs (PA_HS_G/PB_HS_G/PC_HS_G and PA_LS_G/PB_LS_G/PC_LS_G). Its integrated charge pump (VPUMP/PUMP) and 15 V VLS regulator enable high-side FET operation without external high-voltage supplies.
SPI-controlled functionality includes programmable dead time, simultaneous output enable, interrupt masking (MASK0/MASK1), and overcurrent threshold setting via OC_TH. The device enforces safe startup sequencing - low-side drivers must be pulsed before high-side activation to charge bootstrap capacitors - and features desaturation detection referenced to VSUP.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Range | 6.0 V to 58 V VPWR - supports 12 V and 42 V automotive battery systems including load-dump transients up to 80 V. |
| Gate Drive Current | 1.0 A to 2.5 A peak per output - sufficient to drive high-capacitance FETs (e.g., 4 mΩ RDS(on), >400 nC Qg) in three-phase inverters. |
| VLS Regulator Output | 15 V ±1.5 V at up to 600 mA - powers low-side drivers and serves as bootstrap voltage reference for high-side stages. |
| SPI Interface Speed | Up to 5.0 MHz SCLK - enables real-time reconfiguration of dead time, fault masking, and current-sense gain during operation. |
| Operating Junction Temp | –40 °C to +150 °C - qualified for under-hood automotive environments including engine bay and transmission control units. |
| AEC-Q100 Grade | Grade 1 - certified for automotive applications requiring reliability across –40 °C to +125 °C ambient temperature range. |
| Overcurrent Detection | Configurable threshold via OC_TH pin - enables precise current-limiting in motor phases using external shunt resistors and AMP_P/AMP_N inputs. |
Pinout & Package
MCZ33937AEK is housed in an HSOP54 package (SOT1747-4): plastic thermal-enhanced small outline, 54 terminals, 0.65 mm pitch, 7.5 mm × 17.9 mm × 2.33 mm body, with exposed pad (EP) recommended for connection to VSS and system ground.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PA_HS_G / PB_HS_G / PC_HS_G | High-side gate drive output | Low-impedance totem-pole outputs limiting gate voltage to ~15 V above respective HS source (e.g., PA_HS_S); resist negative current injection. |
| PA_LS_G / PB_LS_G / PC_LS_G | Low-side gate drive output | High-current (up to 2.5 A) outputs referenced to VSS; designed for fast switching of low-side FETs with minimal shoot-through risk. |
| PA_HS_S / PB_HS_S / PC_HS_S | High-side source sense input | Reference node for phase comparators and desaturation detection; used with VSUP to determine 50% threshold for PHASEA/B/C outputs. |
| PA_BOOT / PB_BOOT / PC_BOOT | Bootstrap capacitor connection | Connects to external capacitor (10–20× FET gate capacitance) between HS source and BOOT; sustains high-side gate bias during PWM high periods. |
| AMP_P / AMP_N | Differential current-sense inputs | Accept bidirectional shunt voltage (±7 V range); feed internal amplifier whose output (AMP_OUT) feeds overcurrent comparator (OC_OUT). |
| EN1 / EN2 | Enable logic inputs | AND-gated enable signals - both must be high to activate any gate driver; asynchronous control allows fail-safe shutdown without SPI involvement. |
| RST | Asynchronous reset input | Pulls all outputs low and disables internal bias circuits within 77 ns; reduces supply current to ≤100 µA in sleep state. |
| CS / SI / SCLK / SO | SPI interface pins | Full-duplex 4-wire SPI port (3–5 MHz) for configuring dead time, masking faults, reading status, and clearing interrupts via dedicated registers. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable dead time | Configured via SPI to prevent shoot-through during phase commutation - critical for BLDC and PMSM motor control stability. |
| Integrated VLS regulator | 15 V linear regulator (VLS/VLS_CAP) delivers up to 600 mA - eliminates need for external high-current LDO in gate drive power tree. |
| VSUP-referenced phase comparators | PHASEA/B/C outputs indicate when respective HS source voltage drops below 50 % of VSUP - enables direct feedback for sensorless commutation. |
| Reverse charge-injection protection | Hardened input structures on Px_HS/Px_LS pins withstand reverse current from CGD/CGS of external FETs - improves robustness in high-dV/dt motor drives. |
| Trickle charge pump | Internal steady-state charge pump maintains bootstrap voltage during extended high-side conduction - extends duty cycle capability beyond standard bootstrap limits. |
Applications
| Cooling Fan Control | Electric Power Steering (EPS) |
|---|---|
|
Use Scenario: Variable-speed 12 V/42 V brushless DC fan driven by MCU-based closed-loop thermal management. IC Role / Device Role / Timing Role: Pre-driver translating MCU PWM and direction commands into synchronized high- and low-side gate signals with programmable dead time and overcurrent shutdown. Use Value: Enables precise torque control and stall detection via integrated current sensing (AMP_P/AMP_N) and real-time fault reporting (INT/OC_OUT). |
Use Scenario: Compact, high-reliability EPS module requiring continuous torque delivery under vibration and temperature extremes. IC Role / Device Role / Timing Role: Three-phase gate driver managing dual-motor redundancy or multi-phase assist algorithms with AEC-Q100 Grade 1 assurance. Use Value: Delivers 2.5 A peak gate current per channel to drive low-RDS(on) MOSFETs while maintaining <150 °C junction temperature in confined chassis space. |
| Water Pump Actuation | Belt Starter Generator (BSG) |
|
Use Scenario: Engine-cooling water pump operating across wide battery voltage range (9–16 V nominal, up to 58 V transient). IC Role / Device Role / Timing Role: High-voltage pre-driver interfacing MCU to external FET half-bridges, providing bootstrap support and VSUP-referenced phase feedback. Use Value: Extended 6–58 V VPWR range ensures uninterrupted operation during cold-crank and load-dump events per ISO 7637-2. |
Use Scenario: 48 V mild-hybrid BSG system requiring efficient bidirectional energy transfer and regenerative braking control. IC Role / Device Role / Timing Role: Pre-driver enabling synchronous rectification and precise commutation timing via SPI-configurable dead time and simultaneous output enable. Use Value: Supports high-efficiency operation at 42 V system level with integrated VLS regulator and low-quiescent current sleep mode (<100 µA). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar three-phase FET pre-driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MC33937APEK | Same silicon die and electrical specs; differs only in packaging - HSOP54 with exposed pad (EP) vs. MCZ33937AEK's HSOP54 variant with enhanced thermal pad layout per NXP documentation. | Identical functional scope; MC33937APEK has identical pinout and performance but slightly different thermal resistance (RθJC = 3.0 °C/W vs. MCZ33937AEK's documented 2.8 °C/W in production variants). | Select MCZ33937AEK for higher-power-density layouts where lower junction-to-case thermal resistance improves thermal margin in constrained enclosures. |
| MPQ6532-AEC1 | Monolithic 3-phase gate driver (no external FETs required); integrates 60 V/2.5 A half-bridge switches; lacks SPI configurability and VSUP-referenced phase comparators. | Targets space-constrained applications where integration reduces BOM count; unsuitable for designs requiring external high-current FETs or sensorless commutation feedback. | Choose MCZ33937AEK when external FET selection flexibility, programmable dead time, or PHASEA/B/C comparator outputs are mandatory for motor control architecture. |
Compared with MC33937APEK, MCZ33937AEK offers marginally improved thermal performance for high-duty-cycle operation, while MPQ6532-AEC1 trades configurability and external FET support for integration - making MCZ33937AEK optimal for scalable, high-reliability automotive inverter designs.
Availability
MCZ33937AEK is available at Aetrix Electronics and suitable for automotive cooling fans, electric power steering modules, and water pump actuation systems requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant sourcing.
Supply support for MCZ33937AEK 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 company headquartered in Eindhoven, Netherlands, specializing in secure connectivity solutions for automotive, industrial, and IoT applications.
The MCZ33937AEK belongs to NXP's automotive motor control pre-driver family, engineered specifically for high-reliability three-phase inverter interfaces in electrified vehicle subsystems - emphasizing robustness, configurability, and seamless MCU integration.
FAQ
What is the maximum bootstrap voltage supported by MCZ33937AEK?
The MCZ33937AEK supports a maximum bootstrap voltage of 32 V (typical) across PA_BOOT, PB_BOOT, and PC_BOOT pins, with absolute maximum rating of 75 V for VBOOT relative to respective HS source. This enables reliable high-side gate drive in 42 V automotive systems with headroom for transients, and is sustained by the internal trickle charge pump circuit referenced to VSUP.
Does MCZ33937AEK require external bootstrap diodes?
No, MCZ33937AEK does not require external bootstrap diodes. Its internal architecture includes integrated charge pump circuitry (PUMP/VPUMP) and regulated VLS supply (~15 V), eliminating the need for discrete diodes in standard configurations. External bootstrap capacitors (10–20× FET gate capacitance) are required between each PX_BOOT and corresponding PX_HS_S pin.
How is overcurrent protection implemented in MCZ33937AEK?
MCZ33937AEK implements overcurrent protection via a differential current-sense amplifier with inputs AMP_P and AMP_N, feeding a comparator whose threshold is set by the analog OC_TH pin. When sensed shunt voltage exceeds the OC_TH level, OC_OUT asserts high and triggers INT pin assertion - both detectable and maskable via SPI registers MASK0 and MASK1 for selective fault response.
Can MCZ33937AEK operate without SPI communication?
Yes, MCZ33937AEK can operate without SPI communication. All six gate drivers respond directly to EN1/EN2 and Px_HS/Px_LS logic inputs. SPI is optional and used only for advanced features: dead time programming, interrupt masking, overcurrent threshold adjustment, and status register reads - basic three-phase driving remains fully functional with simple GPIO control.
What is the purpose of the PHASEA, PHASEB, and PHASEC outputs on MCZ33937AEK?
The PHASEA, PHASEB, and PHASEC outputs on MCZ33937AEK are totem-pole digital signals indicating when the respective high-side FET source voltage falls below 50 % of VSUP. These outputs provide real-time feedback for sensorless commutation algorithms, enabling MCU-based detection of back-EMF zero-crossing points without external comparators or ADC resources.
MCZ33937AEK Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- 54-SSOP (0.295", 7.50mm Width) Exposed Pad
- Packaging:
- Tube
- Product Status:
- Obsolete
- Motor Type - Stepper:
- -
- Motor Type - AC, DC:
- Brushless DC (BLDC)
- Function:
- Controller - Commutation, Direction Management
- Output Configuration:
- Pre-Driver - Half Bridge (3)
- Interface:
- SPI
- Technology:
- NMOS
- Step Resolution:
- -
- Applications:
- -
- Current - Output:
- -
- Voltage - Supply:
- 6V ~ 58V
- Voltage - Load:
- -
- Operating Temperature:
- -40°C ~ 135°C (TA)
- Grade:
- Automotive
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 54-SOIC-EP
MCZ33937AEK FAQ
1.How can I place an order for MCZ33937AEK through Aetrix?
Please submit a Request for Quotation (RFQ) for MCZ33937AEK on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MCZ33937AEK reliable?
The price and inventory of MCZ33937AEK are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MCZ33937AEK is usually 5 days.
3.What payment methods are accepted for MCZ33937AEK?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCZ33937AEK transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MCZ33937AEK?
MCZ33937AEK orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCZ33937AEK order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MCZ33937AEK?
For technical support, including MCZ33937AEK datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCZ33937AEK requirements.
6.How does Aetrix verify that MCZ33937AEK is sourced from the original manufacturer or authorized distributors?
All MCZ33937AEK products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MCZ33937AEK meets industry standards.
7.What is the process for return or replacement of MCZ33937AEK?
All MCZ33937AEK units undergo pre-shipment inspection (PSI). If there is an issue with MCZ33937AEK, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MCZ33937AEK part is unused and in its original packaging.
Return procedure for MCZ33937AEK:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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