STMicroelectronics L6230PD

Overview

L6230PD from STMicroelectronics is a fully integrated DMOS 3-phase brushless DC motor driver IC with independent high-side current sensing, non-dissipative overcurrent protection, and integrated fast freewheeling diodes. It delivers 2.8 A peak output current (1.4 A RMS), operates from 8–52 V supply, features R_DS(ON) = 0.73 Ω (typ. at 25 °C), and supports up to 100 kHz switching frequency - enabling field-oriented control (FOC) of BLDC motors in industrial motion systems.

For engineers reviewing the L6230PD datasheet, L6230PD pinout, L6230PD application, or L6230PD equivalent, this device is selected for high-efficiency, thermally robust 3-phase motor drive designs requiring precise current monitoring, cross-conduction protection, diagnostic feedback via open-drain DIAG-EN, and flexible comparator-based current limiting without external sense resistors.

Technical Context

The L6230PD integrates six DMOS power transistors in triple half-bridge topology with BCD process technology, combining isolated power stages with CMOS/bipolar logic and analog circuitry on a single die. Its non-dissipative overcurrent detection monitors each high-side MOSFET's scaled current directly, eliminating external shunt resistors while maintaining ±10% threshold accuracy (ISOVER = 2.8 A typ.).

It implements fixed 1 µs dead-time between high- and low-side switching transitions to prevent shoot-through, uses an internal 600 kHz charge pump (VCP output) to generate bootstrap gate drive voltage (VBOOT), and provides an uncommitted open-drain comparator (CPOUT) with ±14 mV offset and 10 µA bias current for custom current regulation or BEMF sensing.

Key Specifications

Pinout & Package

Available in VFQFPN32 (5×5 mm, 0.5 mm pitch) and PowerSO36 packages. Both feature exposed thermal pads internally connected to GND for enhanced heat dissipation. VFQFPN32 offers lower R_th(j-amb) = 42 °C/W (double-layer PCB); PowerSO36 achieves 36 °C/W with bottom-side copper.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 3-phase BLDC motor driver applications.

Compared with TB9054FG and DRV8305PWP, the L6230PD uniquely balances analog flexibility (uncommitted comparator), self-protected operation (non-dissipative OCD), and wide supply range (8–52 V) - making it optimal for industrial and power-tool designs where component count, thermal resilience, and deterministic analog behavior are prioritized over digital configurability or automotive qualification.

Availability

L6230PD is available at Aetrix Electronics and suitable for industrial motor control, robotics actuation, and power tool applications requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging in both VFQFPN32 and PowerSO36 variants.

Supply support for L6230PD 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

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing analog, power, microcontroller, and sensor solutions for industrial, automotive, and consumer markets.

The L6230PD belongs to ST's high-voltage motor driver product line, engineered specifically for efficient, reliable, and compact 3-phase BLDC control in space-constrained and thermally demanding environments - emphasizing integrated protection, analog signal integrity, and minimal external component count.

FAQ

What is the maximum continuous output current supported by the L6230PD?

The L6230PD supports 1.4 A RMS continuous output current per phase, validated across its full operating temperature range (−25 to 125 °C junction). This rating assumes proper PCB thermal design: ≥42 °C/W R_th(j-amb) for VFQFPN32 or ≤36 °C/W for PowerSO36 with adequate copper area and vias. Peak current reaches 2.8 A for short durations (<1 ms) without triggering OCD.

How does the non-dissipative overcurrent protection work without external sense resistors?

The L6230PD embeds scaled current mirrors in each high-side DMOS transistor, delivering ~1/2000 of the output current to internal comparators. When sensed current exceeds 2.8 A (typ.), the DIAG-EN pin is actively pulled low within 200 ns. No external resistor is needed because the sensing element is monolithically integrated - eliminating power loss, board space, and trace sensitivity issues inherent in shunt-based methods.

Can the internal comparator be used for sensorless BLDC commutation?

Yes - the uncommitted comparator (CP+, CP−, CPOUT) is explicitly designed for BEMF zero-crossing detection. By connecting CP+ to a filtered midpoint voltage and CP− to motor phase voltage via RC network, CPOUT generates timing edges for commutation. The ±14 mV offset and 500 ns propagation delay ensure reliable detection even at low speeds (≥100 RPM) without external op-amps.

What are the key layout requirements for stable operation at 100 kHz switching?

Three layout priorities: (1) Place 100 nF ceramic decoupling capacitors (C2) within 3 mm of VSA/VSB pins to suppress high-frequency supply noise; (2) Route SENSE1–SENSE3 traces as short, symmetric Kelvin pairs to ground - avoid sharing return paths with power GND; (3) Connect all GND pins (including die pad) to a solid inner-layer ground plane using ≥8 thermal vias under the package to maintain R_th(j-amb) ≤42 °C/W.