MC33926PNB

Overview

The MC33926PNB is a monolithic H-Bridge Power IC designed primarily for automotive electronic throttle control applications. It operates within a continuous voltage range of 5.0 V to 28 V, with transient operation supported up to 40 V. The device delivers a continuous output current of 5.0 A and features a maximum RDS(ON) of 225 mΩ per MOSFET at 150°C. It includes over-current limiting via internal constant-off-time PWM, output short-circuit protection, and temperature-dependent current-limit threshold reduction. The IC supports sleep mode with current draw under 50 µA and accepts 3.0 V and 5.0 V TTL/CMOS logic compatible inputs.

Feature Summary

• Monolithic H-Bridge design optimized for automotive electronic throttle control
• Integrated over-current regulation using internal constant-off-time PWM
• Output short-circuit protection against VPWR or ground faults
• Temperature-dependent current-limit threshold reduction for thermal management

Applications

• Automotive electronic throttle control
• Low-voltage DC servo motor control
• EGR valve actuation
• Turbo flap control

Procurement Notes

Verify the specific suffix code (e.g., PNB vs PNBR) to confirm packaging type, as suffixes may indicate reel or cut tape options. Confirm RoHS compliance status through official documentation. Check for end-of-life notices, as this component family has faced obsolescence warnings in some regions. Ensure the supplier provides valid traceability documents for automotive-grade parts.

Selection Notes

Select this component for applications requiring a robust, integrated H-bridge solution with built-in diagnostic features. It is suitable for designs needing high current handling with minimal external components. Consider the PQFN package for thermal performance. Verify input logic compatibility with the host microcontroller. Evaluate the need for AEC-Q100 qualification if required by the specific automotive tier.

Part Context

The MC33926 belongs to NXP's SMARTMOS technology portfolio, combining power MOSFETs with CMOS control logic. It is part of a broader family of motor drivers including the MC33932. The device was originally developed by Freescale Semiconductor before its acquisition by NXP. It serves as a key component in engine management systems, particularly for precise airflow control in modern vehicles.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided source material.