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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Motor Drivers, Controllers

STMicroelectronics L6506D013TR

Name: L6506D013TR
Brand: STMicroelectronics
SKU: L6506D013TR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: L6506D013TR

Manufacturer:: STMicroelectronics

Category:: Motor Drivers, Controllers

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

Datasheet:: L6506D013TR.pdf

Description:: IC MTR DRVR BIPOLAR 4.5V-7V 20SO

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Product details

Overview

L6506D013TR from STMicroelectronics is a current controller IC for bipolar and unipolar stepping motors, implementing PWM chopper-based constant-current drive with dual independent current-sensing channels, 5–70 kHz oscillator frequency range, ±20 mV input offset voltage over temperature, and TTL-compatible logic interface. It operates with 4.5–7 V supply and supports microstepping when paired with L298 or L6114/L6115 bridge drivers.

For engineers reviewing the L6506D013TR datasheet, L6506D013TR pinout, L6506D013TR application, or L6506D013TR equivalent, key selection criteria include peak current programming via external sense resistor and VREF, oscillator synchronization capability across multiple units, independent winding control for half-step/microstep operation, and thermal resistance of 100 °C/W in SO20 package.

Technical Context

The L6506D integrates two independent current-sense comparators, a programmable RC oscillator (5–70 kHz), dual RS flip-flops, and TTL-level logic drivers. Its oscillator uses internal thresholds at 1/3 VCC and 2/3 VCC with a 1 kΩ ±30% discharge resistor, enabling precise PWM timing control for motor winding current regulation.

Each channel senses voltage across an external sense resistor to compare against a reference voltage (VREF); when sensed voltage reaches VREF, the comparator resets its associated flip-flop, terminating the drive pulse until the next oscillator cycle. Synchronization across multiple devices is achieved by routing the master's OSC output to SYNC pins of slaves, with unused RC networks grounded.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Voltage Range	4.5 V to 7 V - defines compatible logic-level power rails when used with L298 or L6114/L6115 bridge drivers
Oscillator Frequency	5 kHz to 70 kHz - sets PWM chopping rate; determined by external R-C network on Pin 1
Input Offset Voltage	±20 mV (over temp) - limits current sensing accuracy; impacts minimum resolvable peak current step
Response Time	0.8–1.5 µs - determines shortest detectable current transient before comparator action
Thermal Resistance	100 °C/W (SO20) - defines junction-to-ambient temperature rise per watt dissipated in surface-mount layout
Logic Compatibility	TTL - ensures direct interfacing with standard microcontroller GPIO without level-shifting
Quiescent Current	25 mA at VCC = 7 V - establishes baseline power draw during active regulation, excluding load driver losses

Pinout & Package

Package: SO20 (Small Outline, 20-pin, 0.300" wide, 1.27 mm pitch).

Pin/Terminal	Circuit Role	Design Meaning
1	Oscillator Timing Input	Connects external R-C network to set chopper frequency; internal discharge resistor is 1 kΩ ±30%
2, 3	Current Sense Inputs A/B	Differential inputs for sensing voltage across external sense resistors on motor windings
4, 5	Reference Voltage Inputs A/B	Accept independent VREF voltages to program peak current per winding (I_PEAK = VREF / R_SENSE)
6, 7	Output Enable A/B	TTL-compatible inputs controlling activation of respective chopper outputs; low = disable
8	GND	Analog/digital ground reference for all internal circuitry and sense inputs
9–12	Chopper Outputs A/B	Open-collector TTL outputs driving external bridge enable/control lines (e.g., L298 ENA/ENB)
13	SYNC Input	Accepts master oscillator signal to synchronize chopper timing across multiple L6506D units
14	VCC	Positive supply rail (4.5–7 V); powers internal logic, comparators, and oscillator
15–18	Logic Inputs A/B	TTL-level phase control inputs (e.g., from microcontroller) routed to bridge driver inputs
19, 20	Unused / NC	No internal connection; must be left floating or tied to GND per layout guidelines

Key Features

Feature	Design Value
Dual independent current control channels	Enables asymmetric peak/hold current programming and microstepping via separate VREF and sense inputs per winding
Programmable oscillator with sync capability	Allows multi-axis motor systems to eliminate beat frequencies and reduce EMI through synchronized PWM timing
TTL-compatible I/O with 4 mA sink capability	Directly drives L298 enable inputs or discrete transistor bases without buffer stages
Low input offset drift over temperature	±20 mV max offset ensures stable current regulation across –40°C to +125°C ambient range
Fast 0.8–1.5 µs comparator response	Supports high-frequency chopping (>50 kHz) required for smooth torque delivery in precision positioning

Applications

Bipolar Stepper Motor Drive

Unipolar Stepper Motor Drive

Use Scenario: Driving a 2-phase bipolar stepper motor (e.g., NEMA 17) in CNC motion control with full/half-step modes.

IC Role / Device Role / Timing Role: Current controller providing PWM chopper regulation per winding, synchronized to microcontroller step/direction signals.

Use Value: Enables precise 1.8° step resolution and consistent torque across speed range via adjustable VREF and Rsense.

Use Scenario: Controlling a 4-phase unipolar stepper (e.g., 28BYJ-48) in HVAC damper actuation requiring low-noise, low-power positioning.

IC Role / Device Role / Timing Role: Dual-channel current limiter managing hold vs. active current in each phase using independent VREF inputs.

Use Value: Reduces coil heating during hold state while maintaining responsive start-up torque via programmable peak current.

Multi-Axis Synchronized Motion

Microstepping Motor Controller

Use Scenario: Coordinating three L6506D-equipped axes in a pick-and-place robot to avoid mechanical resonance from unsynchronized PWM noise.

IC Role / Device Role / Timing Role: Slave current controller locked to master oscillator via SYNC pin, ensuring identical chopper timing across all axes.

Use Value: Eliminates audible beat frequencies and reduces conducted EMI in shared power distribution networks.

Use Scenario: Implementing 1/8-step resolution in a lab-grade optical stage requiring sub-micron positioning repeatability.

IC Role / Device Role / Timing Role: Dual-channel current modulator accepting phased VREF ramps to shape sinusoidal winding currents.

Use Value: Achieves smoother motion and lower vibration than full/half-step by independently scaling peak current per phase.

Equivalent & Alternatives

The following parts are listed as comparable options for similar current controller applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
TMC2100-LA	Integrated MOSFET driver + current sense amplifier; SPI-configurable microstepping; no external bridge required	Replaces L6506D + external H-bridge; suited for compact PCBs but requires MCU firmware integration	Select when board space and microstepping granularity >1/16 are critical; not drop-in compatible
DRV8811PWPR	Single-chip stepper driver with integrated current regulator, 1/32 microstepping, and built-in decay mode control	Eliminates need for external bridge and logic interface; higher integration but fixed VREF architecture	Select for simplified BOM and faster time-to-market; requires redesign of sense resistor and timing network

Compared with TMC2100-LA and DRV8811PWPR, the L6506D013TR offers discrete control flexibility-enabling custom decay modes, independent winding tuning, and legacy system compatibility-but requires external bridge drivers and manual oscillator configuration.

Availability

L6506D013TR is available at Aetrix Electronics and suitable for industrial motion control, laboratory instrumentation, and automated valve actuation requiring stable component supply and long-term obsolescence management.

Supply support for L6506D013TR 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, mixed-signal, power, and microcontroller products for industrial, automotive, and consumer markets.

The L6506 series belongs to ST's motor control analog IC portfolio, developed specifically to provide flexible, cost-effective current regulation for stepper motor systems using discrete or integrated bridge drivers.

FAQ

What is the maximum allowable sense resistor voltage for L6506D013TR?

The absolute maximum input voltage at sense pins (2 and 3) is –0.3 V to +3 V per datasheet Section "Electrical Characteristics." Exceeding +3 V risks comparator latch-up or damage. For reliable operation, sensed voltage should stay ≤ VREF (typically ≤2.5 V) to maintain linear regulation and avoid saturation.

Can L6506D013TR drive MOSFET half-bridges directly?

No. L6506D013TR provides TTL-level open-collector outputs (Pins 9–12) rated for 4 mA sink current-not sufficient to drive power MOSFET gates directly. It must interface with external drivers such as L298, L6114/L6115, or discrete transistor stages to handle gate charge and voltage levels.

How does the SYNC function affect oscillator stability?

When SYNC is used, the slave device disables its internal oscillator and locks to the master's OSC output waveform. This eliminates frequency drift between units and ensures deterministic phase alignment-critical for reducing torque ripple in multi-motor systems-without affecting individual VREF or Rsense calibration.

Is L6506D013TR RoHS compliant and halogen-free?

Yes. Per STMicroelectronics' official product change notification PCN 17-0127 and packaging data sheet, L6506D013TR (SO20 package) meets RoHS Directive 2011/65/EU and is certified halogen-free (IEC 61249-2-21 compliant), with lead-free matte tin terminations and green molding compound.

L6506D013TR Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

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

Packaging:: Tape & Reel (TR)

Product Status:: Active

Motor Type - Stepper:: Bipolar

Motor Type - AC, DC:: -

Function:: Controller - Current Management

Output Configuration:: Pre-Driver - Half Bridge (4)

Interface:: Parallel

Technology:: -

Step Resolution:: 1, 1/2

Applications:: General Purpose

Current - Output:: -

Voltage - Supply:: 4.5V ~ 7V

Voltage - Load:: -

Operating Temperature:: 0°C ~ 125°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 20-SO

L6506D013TR FAQ

1.How can I place an order for L6506D013TR through Aetrix?

Please submit a Request for Quotation (RFQ) for L6506D013TR 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 L6506D013TR reliable?

The price and inventory of L6506D013TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for L6506D013TR is usually 5 days.

3.What payment methods are accepted for L6506D013TR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for L6506D013TR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for L6506D013TR?

L6506D013TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your L6506D013TR 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 L6506D013TR?

For technical support, including L6506D013TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your L6506D013TR requirements.

6.How does Aetrix verify that L6506D013TR is sourced from the original manufacturer or authorized distributors?

All L6506D013TR 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 L6506D013TR meets industry standards.

7.What is the process for return or replacement of L6506D013TR?

All L6506D013TR units undergo pre-shipment inspection (PSI). If there is an issue with L6506D013TR, 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 L6506D013TR part is unused and in its original packaging.

Return procedure for L6506D013TR:

1.Submit a request within 90 days.

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

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