L6229PD

Overview

The L6229PD is a fully integrated three-phase DMOS motor driver designed for brushless DC (BLDC) applications. It operates within an 8 V to 52 V supply range and delivers a peak output current of 2.8 A, with a continuous DC rating of 1.4 A. The device features a typical on-resistance of 0.73 Ω at 25 °C and supports operating frequencies up to 100 kHz. It utilizes BCD technology to integrate isolated DMOS power transistors with CMOS and bipolar circuits. The component is housed in a PowerSO-36 package.

Feature Summary

• Integrates decoding logic for single-ended Hall sensors supporting both 60° and 120° commutation sequences.
• Includes a constant off-time PWM current controller with slow decay synchronous rectification.
• Provides non-dissipative overcurrent protection on high-side MOSFETs and thermal shutdown capabilities.
• Features diagnostic outputs and a tachometer output for closed-loop speed control applications.

Applications

• Three-phase brushless DC motor drives
• Industrial automation systems
• Home appliance motor control

Procurement Notes

Verify the specific suffix 'PD' corresponds to the PowerSO-36 package variant when sourcing. Confirm that the application requires support for single-ended Hall sensor inputs, as this component includes dedicated decoding logic for this interface type. Ensure voltage and current ratings align with the target BLDC motor specifications before finalizing procurement.

Selection Notes

Select this component for designs requiring integrated Hall sensor decoding and PWM current control without external logic. It is suitable for medium-power BLDC applications operating between 8 V and 52 V. Consider the PowerSO-36 package for thermal management requirements associated with 1.4 A continuous current operation.

Part Context

The L6229 series represents STMicroelectronics' solution for integrated three-phase motor control. The L6229PD specifically denotes the version packaged in PowerSO-36, distinguishing it from other variants like the SO24 package. This family combines power stage and control logic to simplify BLDC motor drive design.

Replacement Considerations

Direct substitutes include other L6229 variants such as L6229D or L6229Q, though package differences must be accounted for. Cross-referencing pinouts and thermal characteristics is essential when replacing the PD package with alternative form factors.

FAQ

What types of Hall sensor configurations does the L6229PD support?

The device includes decoding logic for single-ended Hall sensors, supporting both 60-degree and 120-degree commutation sequences.

How does the L6229PD manage overcurrent conditions?

It provides non-dissipative overcurrent detection and protection specifically on the high-side power MOSFETs.