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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Full Half-Bridge (H Bridge) Drivers

STMicroelectronics L6201PSTR

Name: L6201PSTR
Brand: STMicroelectronics
SKU: L6201PSTR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: L6201PSTR

Manufacturer:: STMicroelectronics

Category:: Full Half-Bridge (H Bridge) Drivers

Package:: 20-SOIC (0.295", 7.50mm Width)

Datasheet:: L6201PSTR.pdf

Description:: IC HALF BRIDGE DRIVER 4A 20SO

Quantity:: RFQ Add To RFQ list

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Product details

Overview

L6201PSTR from STMicroelectronics is a monolithic full-bridge DMOS motor driver IC in PowerSO-20 package, designed for bidirectional DC and bipolar stepper motor control. It delivers up to 5 A peak output current (1 A RMS), supports supply voltages up to 48 V, features 0.3 Ω typical R_DS(ON), integrated cross-conduction protection, and TTL/CMOS/µC-compatible logic inputs.

For engineers reviewing the L6201PSTR datasheet, L6201PSTR pinout, L6201PSTR application, or L6201PSTR equivalent, this device is selected for high-efficiency H-bridge power stages requiring bootstrap gate drive, current sensing feedback, thermal shutdown, and dead-time–protected commutation up to 100 kHz in industrial motion control systems.

Technical Context

The L6201PSTR integrates two independent half-bridge channels-each controlled by dedicated IN1/IN2 inputs-with a shared ENABLE signal. Its Multipower-BCD process embeds isolated DMOS power transistors alongside CMOS/Bipolar logic, enabling direct microcontroller interfacing without external level shifters or gate drivers.

It implements internal bootstrap charge pumps for high-side N-channel MOSFET drive, uses an internal 13.5 V reference (Vref) with 2 mA sink capability, and provides current sensing via SENSE pin with –1 V to +4 V input range. Thermal shutdown activates at 150 °C junction temperature, and built-in dead time (>100 ns) prevents shoot-through during switching transitions.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Voltage (Vs)	Up to 48 V - supports 24 V and 42 V motor rails without external regulation
Peak Output Current	5 A - enables driving medium-power DC motors (e.g., 24 V/50 W) with short-duration torque bursts
RMS Output Current	1 A - defines continuous conduction limit for thermal design on PCB copper heatsink
R_DS(ON)	0.3 Ω (typ @ 25 °C) - yields ~300 mW conduction loss at 1 A RMS, reducing heatsink requirements
Operating Frequency	Up to 100 kHz - supports high-resolution PWM speed control and chopper-based current regulation
Logic Compatibility	TTL/CMOS/µC - accepts 0.8 V low / 2.0 V high thresholds, eliminating need for buffer ICs
Thermal Shutdown	150 °C - autonomous protection against overload or poor heatsinking, with automatic recovery
Dead Time	100 ns - hardware-enforced minimum off-time between complementary switches prevents rail-to-rail short circuits

Pinout & Package

Package: PowerSO-20 (exposed lead slug, thermally enhanced surface-mount). Pin layout optimized for motor drive layout: dual ground pins (pins 4,5,13,14,15), separated power (Vs) and sense (SENSE) paths, and dedicated bootstrap (BOOT1/BOOT2) and reference (Vref) terminals.

Pin/Terminal	Circuit Role	Design Meaning
1	SENSE	Current-sense amplifier input - connects to shunt resistor to enable closed-loop motor current regulation
2	ENABLE	Global bridge enable - logic high activates both half-bridges; low disables all outputs to safe state
3,7,12,16,19	N.C.	No internal connection - left unconnected per datasheet; no routing or pull-up required
4,5,13,14,15	GND	Common ground return - multiple pins reduce IR drop and improve noise immunity in high-current paths
6	OUT2	Output of second half-bridge - drives one terminal of bipolar motor or stepper coil phase B
8	Vs	Main power supply input - feeds both high-side and low-side DMOS transistors; decoupling critical
9	OUT1	Output of first half-bridge - drives opposite motor terminal or stepper coil phase A
10	BOOT1	Bootstrap capacitor node for upper transistor of first half-bridge - requires ≥10 nF ceramic cap to ground
11	IN1	Digital input controlling OUT1 - sets direction/state of first half-bridge (H/L = source/sink)
17	IN2	Digital input controlling OUT2 - sets direction/state of second half-bridge independently
18	BOOT2	Bootstrap capacitor node for upper transistor of second half-bridge - separate from BOOT1
20	Vref	Internal 13.5 V reference - bypassed with 0.22 µF capacitor; supplies current sense comparator bias

Key Features

Feature	Design Value
Integrated Bootstrap Charge Pump	Eliminates external high-voltage gate drivers - enables efficient N-channel high-side switching with single Vs rail
Multipower-BCD Process	Combines DMOS power transistors with CMOS/Bipolar logic - achieves <0.3 Ω R_DS(ON) and TTL-compatible inputs on one die
Cross-Conduction Protection	Hardware logic prevents simultaneous high-side/low-side turn-on - removes need for external timing circuitry
Thermal Shutdown with Auto-Restart	Halts operation at 150 °C junction temp and resumes when cooled - protects against sustained overload or airflow loss
Current Sense Interface (SENSE)	Direct analog interface to external current-shunt resistor - supports real-time motor current limiting and stall detection

Applications

DC Motor Speed & Direction Control

Bipolar Stepper Motor Driver

Use Scenario: Bidirectional speed control of 24 V brushed DC motors in automated valves, conveyor modules, and actuator systems.

IC Role / Device Role / Timing Role: Full-H-bridge power stage - converts PWM and direction signals into differential voltage across motor terminals.

Use Value: Enables precise torque and position control using only two GPIOs and one PWM channel from MCU; 1 A RMS rating matches common 24 V/30 W industrial motors.

Use Scenario: Microstepping-capable drive for NEMA 17 bipolar stepper motors in CNC stages and 3D printer extruders.

IC Role / Device Role / Timing Role: Dual half-bridge per phase - each L6201PSTR drives one motor phase under chopper-controlled current regulation.

Use Value: Supports chopper frequencies up to 100 kHz for smooth microstepping; integrated SENSE pin simplifies current feedback loop with L6506 or similar controllers.

Industrial Actuator Interface

Automated Test Equipment (ATE) Load Switch

Use Scenario: High-reliability linear actuator control in factory test fixtures where direction reversal and stall detection are required.

IC Role / Device Role / Timing Role: Robust motor driver with thermal and overcurrent protection - interfaces directly to PLC I/O or industrial MCU.

Use Value: Built-in 150 °C thermal shutdown and current sense feedback eliminate need for discrete protection circuitry, reducing BOM count and board area.

Use Scenario: Programmable DC load switching in bench power supplies and functional testers requiring fast, bidirectional current sourcing/sinking.

IC Role / Device Role / Timing Role: Reversible power switch - configured as active load or regenerative sink depending on IN1/IN2 states.

Use Value: 5 A peak current and 48 V rating allow simulation of dynamic loads up to 240 W; bootstrap architecture supports high-side sinking without floating supplies.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
L6203	Multiwatt-11 package; 4 A RMS rating; higher thermal resistance (R_{th j-amb} = 3 °C/W); same pinout logic but different mechanical footprint	Preferred for through-hole prototyping or high-heat scenarios where bolt-down heatsink is used	Select when board space allows larger package and >1 A RMS continuous current is needed
TB6612FNG	SSOP-24 package; 1.2 A RMS; integrated PWM generator; no Vref or SENSE pin; lower voltage rating (15 V max)	Suitable for low-voltage robotics (e.g., 5–12 V) with integrated PWM timing, not for 24–48 V industrial use	Choose only for compact, low-power embedded designs - not a drop-in replacement due to voltage, current, and feature mismatch

Compared with L6201PSTR, L6203 offers higher RMS current and better heatsinking via Multiwatt package but lacks surface-mount compatibility; TB6612FNG reduces system complexity at the cost of voltage/current capability and eliminates analog current sensing - making it unsuitable for industrial 24–48 V motor control.

Availability

L6201PSTR is available at Aetrix Electronics and suitable for industrial motor control, automated test equipment, and precision motion systems requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for L6201PSTR 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, specializing in power management, motion control, and automotive-grade ICs.

The L6201 series belongs to ST's motor driver product line, engineered specifically for robust, high-efficiency full-bridge control of DC and bipolar stepper motors in industrial automation and embedded motion systems.

FAQ

What is the maximum continuous motor current supported by L6201PSTR?

The L6201PSTR supports 1 A RMS continuous output current under standard PCB heatsinking conditions (T_amb = 70 °C, minimal copper area). This rating is validated by thermal data showing 2.3 W total power dissipation limit at T_j = 150 °C. Exceeding 1 A RMS requires enhanced copper pour or forced air cooling to maintain safe junction temperature.

Can L6201PSTR drive a 48 V motor?

Yes - the absolute maximum supply voltage is 52 V, and recommended operating voltage extends to 48 V. However, at 48 V, peak current must be limited to avoid exceeding thermal limits: P_tot = I² × R_DS(ON) + switching losses. Derating is advised above 36 V, especially at high duty cycles or ambient temperatures above 50 °C.

Is an external bootstrap capacitor required for each BOOT pin?

Yes - separate 10 nF ceramic capacitors must connect BOOT1-to-GND and BOOT2-to-GND. These capacitors supply gate charge for the upper N-channel DMOS transistors during high-side conduction. Using <10 nF risks incomplete turn-on and elevated R_DS(ON); larger values may cause current spikes in the sense resistor during charging.

Does L6201PSTR include internal current limiting?

No - it provides only analog current sense feedback via the SENSE pin. External circuitry (e.g., op-amp comparator or dedicated controller like L6506) is required to close the current regulation loop. The IC does not auto-throttle or shut down based on sensed current; thermal shutdown remains the sole internal overcurrent protection mechanism.

L6201PSTR Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: 20-SOIC (0.295", 7.50mm Width)

Packaging:: Tape & Reel (TR)

Product Status:: Active

Output Configuration:: Half Bridge (2)

Applications:: DC Motors, General Purpose

Interface:: Logic

Load Type:: Inductive

Technology:: BCDMOS

Rds On (Typ):: 300mOhm

Current - Output / Channel:: 4A

Current - Peak Output:: -

Voltage - Supply:: 12V ~ 48V

Voltage - Load:: 12V ~ 48V

Operating Temperature:: -40°C ~ 150°C (TJ)

Grade:: -

Qualification:: -

Features:: Bootstrap Circuit

Fault Protection:: Over Temperature

Mounting Type:: Surface Mount

Supplier Device Package:: 20-SO

L6201PSTR FAQ

1.How can I place an order for L6201PSTR through Aetrix?

Please submit a Request for Quotation (RFQ) for L6201PSTR 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 L6201PSTR reliable?

The price and inventory of L6201PSTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for L6201PSTR is usually 5 days.

3.What payment methods are accepted for L6201PSTR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for L6201PSTR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for L6201PSTR?

L6201PSTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your L6201PSTR 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 L6201PSTR?

For technical support, including L6201PSTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your L6201PSTR requirements.

6.How does Aetrix verify that L6201PSTR is sourced from the original manufacturer or authorized distributors?

All L6201PSTR 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 L6201PSTR meets industry standards.

7.What is the process for return or replacement of L6201PSTR?

All L6201PSTR units undergo pre-shipment inspection (PSI). If there is an issue with L6201PSTR, 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 L6201PSTR part is unused and in its original packaging.

Return procedure for L6201PSTR:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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