STMicroelectronics L6206PD

Overview

L6206PD from STMicroelectronics is a DMOS dual full-bridge motor driver IC designed for bipolar stepper and dual/quad DC motor control, featuring 8–52 V operating supply, 5.6 A peak output current (2.8 A DC), 0.3 Ω typical high-side R_DS(ON) at 25 °C, 100 kHz max switching frequency, and programmable non-dissipative overcurrent detection per bridge.

For engineers reviewing the L6206PD datasheet, L6206PD pinout, L6206PD application, or L6206PD equivalent, this device is selected for precision current-limited H-bridge control in motion systems requiring thermal shutdown, cross-conduction protection, diagnostic feedback, and bootstrap gate drive for N-channel high-side MOSFETs.

Technical Context

The L6206PD integrates two independent full-bridge power stages using BCD technology, each with matched high- and low-side DMOS transistors and intrinsic fast freewheeling diodes. It employs a 600 kHz internal charge pump oscillator (VCP) to generate bootstrap voltage (VBOOT) for driving N-channel high-side switches.

Non-dissipative overcurrent detection operates by sensing a precise fraction of high-side output current-programmable via external resistors (PROGCLA/PROGCLB)-and triggers open-drain diagnostic outputs (OCDA/OCDB) with 200 ns turn-on delay. Thermal shutdown activates at 165 °C (typ.) with 15 °C hysteresis.

Key Specifications

Pinout & Package

Available in PowerSO36 (exposed slug, GND-connected) and SO24 packages; L6206PD specifically uses the PowerSO36 package with integrated thermal path to PCB via pins 1, 18, 19, and 36 (all internally connected to GND slug).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual full-bridge motor driver applications.

Compared with TB6600HG and DRV8876PWPR, the L6206PD uniquely combines programmable per-bridge overcurrent detection, diagnostic feedback, bootstrap gate drive, and paralleling capability - making it optimal for high-reliability, analog-controlled motion systems where thermal and short-circuit resilience are critical.

Availability

L6206PD is available at Aetrix Electronics and suitable for bipolar stepper motor control, dual DC motor drive, industrial actuator modules, and quad half-bridge valve/solenoid applications requiring stable component supply and long-term production continuity.

Supply support for L6206PD 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, specializing in power management, motor control, and automotive-grade ICs with vertical manufacturing and AEC-Q100 qualified processes.

The L6206PD belongs to ST's high-voltage DMOS motor driver product line, engineered for rugged industrial motion control where integrated protection, thermal robustness, and flexible current limiting are essential design requirements.

FAQ

What is the recommended layout practice for SENSEA and SENSEB pins?

SENSEA and SENSEB must connect directly to power ground with minimal trace length and width - ideally using a dedicated copper pour beneath the IC. Avoid routing near noisy signals or sharing ground paths with logic circuits. ST recommends separating power and signal ground planes, joined only at a single point near the IC's GND pins (1, 18, 19, 36 in PowerSO36) to prevent noise coupling into the non-dissipative current sense path.

Can L6206PD drive a unipolar stepper motor?

No - the L6206PD is designed exclusively for bipolar stepper motors and dual/quad DC motors. Its dual full-bridge topology provides complementary H-bridge outputs per phase (e.g., OUT1A/OUT2A), which is incompatible with unipolar stepper wiring that requires center-tapped windings and single-ended switching. Using it for unipolar operation would require external rewiring and forfeit current regulation and protection features.

How does the charge pump circuit affect PCB design?

The internal 600 kHz charge pump (VCP pin) requires two external components: a 220 nF ceramic boot capacitor (CBOOT) placed between VBOOT and OUT1A/OUT2A, and a 10 nF timing capacitor (CP) from VCP to GND. These must be mounted within 5 mm of the IC with short, wide traces. Poor placement causes VBOOT droop, leading to high-side MOSFET dropout and increased R_DS(ON) - especially at high duty cycles or elevated temperatures.

Is L6206PD pin-compatible with earlier L6206 variants?

Yes - the L6206PD shares identical PowerSO36 pinout and electrical specifications with the base L6206, including all logic thresholds, timing parameters, and protection behavior. The "PD" suffix denotes the PowerSO36 package variant (vs. SO24), and no functional or pinout differences exist between L6206 and L6206PD in this package. Migration requires no schematic or layout changes.