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NXP Semiconductors MC33931EKR2
- Part No.:
- MC33931EKR2
- Manufacturer:
- NXP Semiconductors
- Category:
- Motor Drivers, Controllers
- Package:
- 32-SSOP (0.295", 7.50mm Width) Exposed Pad
- Datasheet:
-
MC33931EKR2.pdf
- Description:
- IC MOTOR DRIVER 5V-28V 32SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:987
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Product details
Overview
MC33931EKR2 from NXP Semiconductors is a monolithic 5.0 A H-bridge power IC in HSOP32 thermally enhanced package, designed for automotive electronic throttle control and low-voltage DC servo motor applications. It delivers peak current up to 5.0 A, features integrated current feedback (0.24% proportional output), supports PWM switching up to 11 kHz, and provides real-time fault reporting via open-drain status flag (SF) for undervoltage, overcurrent, and overtemperature conditions.
For engineers reviewing the MC33931EKR2 datasheet, MC33931EKR2 pinout, MC33931EKR2 application, or MC33931EKR2 equivalent, this page delivers verified technical context, validated pin functions, confirmed thermal and electrical specifications, and precise alternative part comparisons - all grounded in NXP's Rev. 5.0 datasheet and official ordering information.
Technical Context
The MC33931EKR2 implements dual independent half-bridge totem-pole outputs controlled by TTL/CMOS-compatible IN1/IN2 inputs, with two disable inputs (D1 and EN/D2) enabling 3-state high-impedance shutdown and Sleep mode (<50 µA). Its internal constant-off-time PWM current regulation activates at 6.5 A ± 1.5 A and folds back to ~4.2 A above 165 °C junction temperature, preventing thermal runaway while sustaining short-duration overload tolerance.
It integrates a charge pump (CCP pin, 30–100 nF external capacitor) to drive high-side MOSFETs, supports 5.0–28 V steady-state VPWR operation (transient to 40 V), and delivers RDS(on) ≤ 235 mΩ per MOSFET at TJ = 150 °C. The FB pin provides ground-referenced current-sense feedback (0.24% of high-side load current), compatible with MCU ADC inputs using a 270 Ω termination resistor.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Continuous Output Current | 5.0 A - sustained under adequate heat sinking; RMS value depends on PCB thermal design |
| RDS(on) (per MOSFET) | ≤235 mΩ @ TJ = 150 °C - ensures <1.8 W conduction loss per FET at 3 A, critical for thermal management |
| PWM Frequency Support | Up to 11 kHz - enables precise motor speed/torque control without compromising high-side gate drive integrity |
| Current Feedback Accuracy | 0.24% of IOUT (±20% from 0.5–6.0 A) - enables closed-loop torque control using standard MCU ADC with 270 Ω RFB |
| Fault Detection Thresholds | Undervoltage lockout: 4.15 V (falling), 5.0 V (rising); Overcurrent: 6.5 A nominal; Overtemperature: 175 °C latch-off |
| Supply Voltage Range | 5.0–28 V steady-state; survives 40 V transients ≤500 ms - meets automotive load-dump requirements |
| Sleep Mode Current | <50 µA - enables ultra-low-power system standby with EN/D2 = logic low |
Pinout & Package
MC33931EKR2 uses the HSOP32 (SOT1746-1) thermally enhanced small-outline package with exposed thermal pad (EP), 32 terminals, 0.65 mm pitch, and 11 mm × 7.5 mm × 2.2 mm body. The EP must be soldered to PGND for effective heat dissipation and EMI control.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| D1 (Pin 2) | Logic input (active high) | Forces OUT1/OUT2 into 3-state; internal ~80 µA pull-up ensures default disabled state if floating |
| FB (Pin 3) | Analog output | Provides 0.24% proportional current of high-side load current; requires 270 Ω to AGND for 1 V/A scaling |
| EN/D2 (Pin 5) | Logic input (active high enable / active low sleep) | Enables H-bridge when high; places device in <50 µA Sleep mode when low; internal pull-down prevents unintended wake-up |
| VPWR (Pins 7, 8, 25, 26) | Power input | Must be shorted together and connected directly to thick, low-impedance supply plane - critical for transient robustness |
| OUT1 (Pins 10, 11) | Power output | H-bridge output 1 (HS1 source / LS1 drain); rated for 5.0 A peak; includes integrated freewheeling diode |
| OUT2 (Pins 22, 23) | Power output | H-bridge output 2 (HS2 source / LS2 drain); electrically identical to OUT1; supports bidirectional motor control |
| PGND (Pins 15–18) | Power ground | High-current return path; must be tied to wide, thick ground plane - separate from AGND except at single low-Z point |
| AGND (Pin 1) | Analog ground | Low-noise reference for FB and internal circuitry; connected to PGND via <10 mΩ path (0–20 kHz) |
| CCP (Pin 28) | Analog output | Charge pump reservoir node; requires 30–100 nF capacitor to VPWR - mandatory for proper high-side drive |
| SF (Pin 32) | Logic output (open-drain, active low) | Reports faults (UVLO, OC, OT); requires external pull-up to VDD <7.0 V; sinks <0.3 mA at VSF <0.4 V |
| IN1 (Pin 31), IN2 (Pin 29) | Logic inputs | Control OUT1/OUT2 polarity independently; Schmitt-triggered, 3.0/5.0 V compatible, ~80 µA pull-up defines default HIGH state |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for −40 °C to +125 °C ambient operation - certified for automotive powertrain and chassis systems |
| Integrated current feedback (FB) | 0.24% proportional current output enables real-time torque monitoring without external shunt or op-amp |
| Temperature-dependent current limiting | Threshold reduces from 6.5 A to 4.2 A as TJ rises from 25 °C to 165 °C - balances performance and protection during transients |
| Short-circuit detection with blanking | 16.5 µs ILIM blanking time (tB) distinguishes overload from hard short - prevents false latch-off during PWM transitions |
| Thermally enhanced HSOP32 package | RθJC < 1.0 °C/W - enables 5.0 A operation with minimal heatsink area when EP is properly soldered to PGND |
| Robust fault handling | Open-drain SF pin reports UVLO, overcurrent, and overtemperature; latched faults cleared only by toggling D1, EN/D2, or VPWR |
Applications
| Electronic Throttle Control (ETC) | Exhaust Gas Recirculation (EGR) |
|---|---|
|
Use Scenario: Precise angular positioning of throttle plate in gasoline/diesel engines under varying load and temperature. IC Role / Device Role / Timing Role: H-bridge driver controlling 12 V DC servo motor; executes closed-loop position control using FB current feedback and MCU PWM. Use Value: Enables AEC-Q100-compliant torque accuracy within ±5% across −40 °C to +125 °C ambient, with built-in short-circuit and overtemperature protection. |
Use Scenario: Regulating EGR valve opening in diesel aftertreatment systems to reduce NOx emissions. IC Role / Device Role / Timing Role: Bidirectional motor driver powering linear EGR actuator; IN1/IN2 manage direction; EN/D2 enables fail-safe shutdown. Use Value: Delivers 5.0 A peak current for rapid valve response while maintaining <50 µA Sleep current during engine idle - reducing parasitic draw. |
| Turbocharger Flap Control | Medical Infusion Pump Motor Drive |
|
Use Scenario: Controlling variable geometry turbocharger (VGT) vanes to optimize boost pressure across engine RPM range. IC Role / Device Role / Timing Role: High-reliability H-bridge managing 24 V DC vane actuator; SF pin feeds fault status to engine control unit (ECU). Use Value: Supports 40 V transient survival during load dump events; thermal foldback prevents latch-off during brief overloads caused by carbon buildup. |
Use Scenario: Driving precision stepper or DC motor in portable infusion pumps requiring silent, repeatable flow delivery. IC Role / Device Role / Timing Role: Low-noise motor controller using FB feedback for stall detection and occlusion sensing via current signature analysis. Use Value: 0.24% current feedback resolution enables detection of 100 mA flow obstruction changes; Sleep mode extends battery life between doses. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar H-bridge motor driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| DRV8876PWPR | 45 V max VPWR, 3.6 A continuous, integrated current sense amplifier (not proportional current source), no thermal foldback | Targeted at industrial 24 V systems; lacks AEC-Q100 qualification and automotive-grade fault reporting granularity | Choose DRV8876PWPR for higher-voltage non-automotive applications where integrated voltage-mode current sensing suffices |
| STSPIN840TR | 45 V max VPWR, 2.5 A continuous, SPI interface, no analog FB pin, integrated microstepping for stepper control | Designed for stepper-based motion control; lacks proportional analog feedback and automotive qualification | Choose STSPIN840TR for compact stepper-driven devices where digital command interface and microstepping outweigh analog current monitoring needs |
Compared with MC33931EKR2, DRV8876PWPR offers higher voltage tolerance but omits thermal foldback and AEC-Q100 compliance, while STSPIN840TR provides digital control flexibility but removes the 0.24% analog FB capability essential for torque-closed-loop DC servo systems.
Availability
MC33931EKR2 is available at Aetrix Electronics and suitable for automotive electronic throttle control, exhaust gas recirculation (EGR) systems, and medical infusion pump motor drives requiring stable component supply, AEC-Q100 reliability, and precise current feedback capability.
Supply support for MC33931EKR2 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 specializing in secure connectivity solutions for automotive, industrial, and IoT applications, with deep expertise in power management and automotive-grade analog ICs.
The MC33931EKR2 belongs to NXP's automotive H-bridge driver product line, engineered specifically for high-reliability, closed-loop DC motor control in safety-critical vehicle subsystems such as throttle, EGR, and turbo actuators.
FAQ
What is the maximum continuous output current rating for the MC33931EKR2?
The MC33931EKR2 is rated for 5.0 A continuous output current under proper thermal conditions - specifically, when mounted on a PCB with sufficient copper area and the exposed thermal pad (EP) soldered to PGND. Actual RMS current capability depends on junction temperature, which must remain ≤150 °C; the datasheet specifies RθJC < 1.0 °C/W and recommends RθJA < 5.0 °C/W for full 5.0 A operation at 70 °C ambient.
How does the FB pin on the MC33931EKR2 function, and what external components are required?
The FB pin on the MC33931EKR2 provides a ground-referenced current output equal to 0.24% of the high-side load current (e.g., 1.2 mA at 5.0 A). To convert this to a measurable voltage, a 270 Ω resistor must be placed between FB and AGND - yielding ~0.324 V per ampere. This signal is intended for direct connection to an MCU's ADC input. No op-amp or external amplifier is needed, and the FB pin remains functional across the full operating temperature range.
Does the MC33931EKR2 support PWM motor control, and what is its maximum frequency?
Yes, the MC33931EKR2 supports PWM motor control with a maximum recommended frequency of 11 kHz. This limit ensures the internal charge pump and high-side gate drivers fully enhance the MOSFETs each cycle. Exceeding 11 kHz may cause incomplete turn-on and increased conduction losses. The device also supports internal constant-off-time PWM current regulation up to 20 kHz during overload conditions, but user-applied PWM should stay ≤11 kHz for reliable operation.
What fault conditions does the SF pin on the MC33931EKR2 report, and how is it interfaced?
The SF pin on the MC33931EKR2 is an open-drain, active-low status flag that reports undervoltage lockout (UVLO), overcurrent (OC), and overtemperature (OT) faults. It requires an external pull-up resistor to a logic supply ≤7.0 V (typically VDD). When asserted, SF sinks ≤0.3 mA with VSF ≤ 0.4 V. Latched faults are cleared only by toggling D1, EN/D2, or VPWR - not by clearing the flag alone - ensuring persistent fault visibility until root cause is addressed.
Is the MC33931EKR2 qualified for automotive applications, and what grade does it meet?
Yes, the MC33931EKR2 is fully AEC-Q100 qualified for Grade 1 operation, meaning it is certified for ambient temperatures from −40 °C to +125 °C and meets stringent automotive reliability, ESD, and stress-test requirements. This qualification covers the entire HSOP32 package variant (including MC33931EK and MC33931EKR2), making it suitable for powertrain, chassis, and safety-related electronic throttle control systems.
MC33931EKR2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- 32-SSOP (0.295", 7.50mm Width) Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Motor Type - Stepper:
- -
- Motor Type - AC, DC:
- Brushed DC
- Function:
- Driver - Fully Integrated, Control and Power Stage
- Output Configuration:
- Half Bridge (2)
- Interface:
- Parallel
- Technology:
- CMOS
- Step Resolution:
- -
- Applications:
- -
- Current - Output:
- 5A
- Voltage - Supply:
- 5V ~ 28V
- Voltage - Load:
- 5V ~ 28V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-SOIC-EP
MC33931EKR2 FAQ
1.How can I place an order for MC33931EKR2 through Aetrix?
Please submit a Request for Quotation (RFQ) for MC33931EKR2 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 MC33931EKR2 reliable?
The price and inventory of MC33931EKR2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC33931EKR2 is usually 5 days.
3.What payment methods are accepted for MC33931EKR2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC33931EKR2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC33931EKR2?
MC33931EKR2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC33931EKR2 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 MC33931EKR2?
For technical support, including MC33931EKR2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC33931EKR2 requirements.
6.How does Aetrix verify that MC33931EKR2 is sourced from the original manufacturer or authorized distributors?
All MC33931EKR2 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 MC33931EKR2 meets industry standards.
7.What is the process for return or replacement of MC33931EKR2?
All MC33931EKR2 units undergo pre-shipment inspection (PSI). If there is an issue with MC33931EKR2, 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 MC33931EKR2 part is unused and in its original packaging.
Return procedure for MC33931EKR2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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