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NXP Semiconductors MCZ33937EK
- Part No.:
- MCZ33937EK
- Manufacturer:
- NXP Semiconductors
- Category:
- Motor Drivers, Controllers
- Package:
- 54-SSOP (0.295", 7.50mm Width) Exposed Pad
- Datasheet:
-
MCZ33937EK.pdf
- Description:
- IC MOTOR DRIVER 6V-58V 54SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,580
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Product details
Overview
MCZ33937EK 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 with programmable dead time.
For engineers reviewing the MCZ33937EK datasheet, MCZ33937EK pinout, MCZ33937EK application, or MCZ33937EK equivalent, this page provides verified technical context, validated pin functions, confirmed automotive-grade protection features, and real-world motor control use cases - all aligned to the official NXP Rev. 14 product data sheet.
Technical Context
The MCZ33937EK implements SMARTMOS technology with independent high- and low-side driver stages per phase, each featuring bootstrap-fed high-side gate drive and direct-source-referenced low-side drive. Its integrated charge pump supports bootstrapped operation up to 58 V VSUP, while the VLS regulator delivers ~15 V gate bias from VPWR.
SPI-controlled functionality includes programmable dead time, interrupt masking via MASK0/MASK1 registers, simultaneous output enable, and configurable overcurrent threshold via OC_TH. Protection architecture covers reverse charge injection immunity, desaturation detection, thermal shutdown, and robust ESD ratings (±2000 V HBM on critical pins).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Range | 6.0 V to 58 V VPWR - enables direct battery connection in 12 V/42 V automotive systems without external regulators |
| Gate Drive Current | 1.0 A to 2.5 A peak per channel - sufficient to drive high-capacitance FETs (e.g., ≤4 mΩ RDS(on), >400 nC Qg) at 20 kHz PWM |
| VLS Output Voltage | 13.5 V to 17 V - regulated ~15 V supply for low-side drivers and bootstrap sourcing, stable across 8–40 V VPWR input |
| SPI Clock Max | 5.0 MHz - supports fast register access for real-time dead time adjustment and fault clearing during motor commutation |
| AEC-Q100 Grade | Grade 1 (–40 °C to +125 °C ambient) - qualified for under-hood automotive applications including engine bay cooling fans and water pumps |
| Overcurrent Sensing | Configurable threshold via OC_TH pin - enables precise current limit setting for motor phase windings using external sense resistor |
| Thermal Resistance | RθJC = 3.0 °C/W - supports high-power operation with proper heatsinking on exposed pad (EP) |
Pinout & Package
MCZ33937EK 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 outputs | Low-impedance outputs delivering up to 2.5 A to turn on external N-channel FETs; voltage limited to ~15 V above respective HS source |
| PA_LS_G / PB_LS_G / PC_LS_G | Low-side gate drive outputs | Direct-drive outputs referenced to respective LS source pins; support fast switching with negative-current immunity |
| PA_HS_S / PB_HS_S / PC_HS_S | High-side source references | Return paths for high-side FET sources; serve as bootstrap capacitor low-side nodes and desaturation comparator references |
| PA_LS_S / PB_LS_S / PC_LS_S | Low-side source references | Return paths for low-side FET sources; minimize ground bounce by routing directly to FET source pads |
| PHASEA / PHASEB / PHASEC | Phase comparator outputs | Totem-pole digital outputs indicating when respective HS source voltage falls below 50 % of VSUP - used for synchronous rectification or diagnostics |
| AMP_P / AMP_N / AMP_OUT | Current-sense amplifier interface | Differential inputs and single-ended output for shunt-based motor phase current measurement; AMP_OUT feeds OC comparator |
| OC_TH | Overcurrent threshold input | Analog voltage input setting trip point for overcurrent comparator - allows precise current limiting without external DAC |
| EN1 / EN2 | Enable logic inputs | AND-gated enable signals requiring both high to activate gate drives; ensure safe startup sequence and fault shutdown |
| RST | Asynchronous reset input | Forces IC into low-power state (<100 µA), disables all outputs, resets internal logic within 77 ns - critical for fail-safe motor stop |
| CS / SI / SCLK / SO | SPI interface pins | Full-duplex 4-wire SPI port supporting register read/write, interrupt clearing, dead time programming, and mask configuration |
Key Features
| Feature | Design Value |
|---|---|
| Programmable dead time | Configured via SPI registers to prevent shoot-through during phase commutation - eliminates need for external timing components |
| Integrated VLS regulator | ~15 V linear regulator powered from VPWR - supplies gate drive bias and bootstrap charging without external LDO |
| Reverse charge-injection protection | Hardened input structures on HS/LS gate pins - prevents false triggering from Miller-induced transients in high-dV/dt motor phases |
| Bootstrap capacitor support | Dedicated PA_BOOT/PB_BOOT/PC_BOOT pins with 10×–20× gate capacitance sizing guidance - enables reliable high-side drive in 3-phase bridge topologies |
| Desaturation detection | VSUP-referenced comparators monitoring PHASEA/B/C - detects open-load or short-circuit conditions in real time |
| Interrupt-driven fault handling | INT pin asserts high on overcurrent, desat, thermal, or SPI error - allows MCU to respond within microseconds via SPI clear command |
Applications
| Cooling Fan Control | Electric Power Steering (EPS) |
|---|---|
Use Scenario: Variable-speed 12 V/48 V brushless DC fan in engine bay or HVAC system, requiring precise torque control and thermal derating. IC Role / Device Role / Timing Role: Pre-driver managing six external MOSFETs in 3-phase inverter topology; synchronizes gate timing via SPI-configured dead time and PHASEx feedback. Use Value: Enables smooth fan ramp-up/down, reduces acoustic noise via optimized PWM, and protects against stalled-rotor overcurrent using AMP-based sensing. | Use Scenario: High-reliability 42 V EPS assist motor demanding ASIL-B compliance, fast response, and fault containment. IC Role / Device Role / Timing Role: Safety-critical pre-driver providing isolated gate control, real-time overcurrent detection, and hardware-enforced enable sequencing (EN1/EN2). Use Value: Supports functional safety requirements through AEC-Q100 Grade 1 operation, diagnostic coverage via INT/PHASEx, and fail-safe RST-triggered shutdown. |
| Water Pump Actuation | Belt Starter Generator (BSG) |
Use Scenario: Engine-cooling water pump operating continuously at variable speed across wide temperature range (–40 °C to +125 °C). IC Role / Device Role / Timing Role: Three-phase gate driver interfacing with MCU via SPI and discrete EN/RST lines; uses VLS regulator for stable gate bias under battery voltage sag. Use Value: Maintains consistent flow control during cold cranking (6 V VPWR) and load dump (80 V transient), supported by extended supply range and ISO7637-compliant survival rating. | Use Scenario: 48 V BSG motor performing start-stop, regenerative braking, and torque assist in mild hybrid vehicles. IC Role / Device Role / Timing Role: High-efficiency pre-driver enabling bidirectional power flow with simultaneous high-/low-side switching capability via safe SPI command. Use Value: Reduces conduction losses via 2.5 A gate drive strength, improves energy recovery accuracy using differential current sensing (AMP_P/N), and ensures robustness against 42 V system transients. |
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 die, identical electrical specs and pinout; differs only in tape-and-reel packaging and RoHS marking suffix | No functional difference - suitable for same PCB layout and firmware | Select MC33937APEK for volume production where packaging format aligns with SMT line requirements |
| MPQ6535-AEC1 | Monolithic 3-phase gate driver (integrated FETs); lower peak drive (1.2 A), no SPI, fixed dead time, 5–28 V range | Limited to lower-power BLDC motors (<300 W); lacks programmability and diagnostics of MCZ33937EK | Choose MPQ6535-AEC1 only for cost-sensitive, space-constrained applications where external FETs and configurability are unnecessary |
Compared with MCZ33937EK, MC33937APEK offers identical performance in a different packaging variant, while MPQ6535-AEC1 trades configurability and voltage range for integration and reduced BOM count - making MCZ33937EK the preferred choice for high-power, safety-critical, or field-upgradable automotive motor systems.
Availability
MCZ33937EK is available at Aetrix Electronics and suitable for automotive cooling fan control, electric power steering, and belt starter generator applications requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant traceability.
Supply support for MCZ33937EK 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 markets.
The MCZ33937EK belongs to NXP's automotive motor control pre-driver product line, engineered specifically for high-reliability, high-voltage three-phase inverter systems in engine bay and chassis applications.
FAQ
What is the maximum VSUP voltage rating for MCZ33937EK during load dump conditions?
The MCZ33937EK supports up to 80 V VSUP during load dump transients per ISO7637, as confirmed in Table 3 (Limiting Values) of the NXP Rev. 14 datasheet. This rating applies to survival - not continuous operation - and ensures robustness in 12 V automotive systems experiencing battery disconnection events. The device remains functional after such transients if clamped within specification limits.
Does MCZ33937EK require external bootstrap diodes?
No, MCZ33937EK does not require external bootstrap diodes. Its internal trickle charge pump and dedicated PX_BOOT pins (PA_BOOT, PB_BOOT, PC_BOOT) are designed for direct capacitor coupling to respective high-side source pins (PX_HS_S). The datasheet specifies VF = 1.2 V forward drop for internal bootstrap diodes, confirming monolithic integration.
How is overcurrent detection configured on MCZ33937EK?
Overcurrent detection on MCZ33937EK is configured via the analog OC_TH pin, which sets the threshold voltage for the integrated overcurrent comparator. The current-sense amplifier (AMP_P/AMP_N) feeds AMP_OUT to the comparator input. Threshold selection follows Ohm's Law: VOC_TH = Ilimit × Rshunt × Gamp, where gain is fixed. No SPI register write is needed for basic threshold setting.
Can MCZ33937EK drive both N-channel and P-channel high-side FETs?
MCZ33937EK is designed exclusively for N-channel high-side FETs using bootstrap gate drive. Its high-side outputs (PX_HS_G) are referenced to respective PX_HS_S pins and deliver voltage ~15 V above source potential - incompatible with P-channel gate drive requirements. The datasheet specifies "external N-channel FETs" throughout General Description and Functional Descriptions.
What is the purpose of the PHASEA, PHASEB, and PHASEC pins on MCZ33937EK?
The PHASEA, PHASEB, and PHASEC pins on MCZ33937EK are totem-pole digital outputs from internal comparators that monitor the voltage at each high-side FET source relative to VSUP. Each pin goes low when its respective source voltage drops below 50 % of VSUP - indicating conduction state or desaturation. These signals support synchronous rectification control and open-load diagnostics in motor control firmware.
MCZ33937EK 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
MCZ33937EK FAQ
1.How can I place an order for MCZ33937EK through Aetrix?
Please submit a Request for Quotation (RFQ) for MCZ33937EK 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 MCZ33937EK reliable?
The price and inventory of MCZ33937EK are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MCZ33937EK is usually 5 days.
3.What payment methods are accepted for MCZ33937EK?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCZ33937EK transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MCZ33937EK?
MCZ33937EK orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCZ33937EK 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 MCZ33937EK?
For technical support, including MCZ33937EK datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCZ33937EK requirements.
6.How does Aetrix verify that MCZ33937EK is sourced from the original manufacturer or authorized distributors?
All MCZ33937EK 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 MCZ33937EK meets industry standards.
7.What is the process for return or replacement of MCZ33937EK?
All MCZ33937EK units undergo pre-shipment inspection (PSI). If there is an issue with MCZ33937EK, 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 MCZ33937EK part is unused and in its original packaging.
Return procedure for MCZ33937EK:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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