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STMicroelectronics L6205D
- Part No.:
- L6205D
- Manufacturer:
- STMicroelectronics
- Category:
- Motor Drivers, Controllers
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
L6205D.pdf
- Description:
- IC MTR DRVR BIPOLAR 8-52V 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,896
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Product details
Overview
L6205D from STMicroelectronics is a DMOS dual full-bridge motor driver IC designed for bipolar stepper and dual/quad DC motor control, featuring 5.6A peak output current (2.8A DC), 0.34Ω typical high-side RDS(ON) at 25°C, 100kHz max switching frequency, non-dissipative overcurrent protection, and integrated fast freewheeling diodes.
For engineers reviewing the L6205D datasheet, L6205D pinout, L6205D application, or L6205D equivalent, this device supports precise bidirectional current control in motion systems requiring robust thermal shutdown, cross-conduction prevention, bootstrap gate drive, and parallel operation capability for higher current or lower RDS(ON).
Technical Context
The L6205D integrates two independent DMOS full bridges with TTL/CMOS-compatible logic inputs (IN1A/IN2A/IN1B/IN2B), enable-controlled operation (ENA/ENB), and internal charge-pump oscillator (VCP @ 0.6–1MHz) generating VBOOT for N-channel high-side gate drive. Each bridge includes dedicated SENSEA/SENSEB pins for current sensing and thermal shutdown activation at 165°C.
Its non-dissipative overcurrent detection monitors high-side MOSFET conduction current directly-eliminating external sense resistors-and triggers EN pin pull-down via internal open-drain transistors (4mA sink capability) with programmable disable time (via REN/CEN) and 5.6A typical trip threshold.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 8–52V - Enables direct interface with industrial 24V/48V DC bus without external regulation. |
| Peak Output Current | 5.6A - Supports short-duration torque bursts in stepper microstepping or DC motor acceleration. |
| RDS(ON) (High-Side, 25°C) | 0.34Ω typ. - Limits conduction loss to ≤4.8W per channel at 2.8A RMS, enabling compact thermal design. |
| Switching Frequency | Up to 100kHz - Allows high-resolution PWM current control while maintaining low switching loss. |
| Overcurrent Threshold | 5.6A typ. - Programmable disable timing via external REN/CEN avoids nuisance tripping during startup surge. |
| Thermal Shutdown | 165°C junction temp - Hysteresis of ~15°C prevents oscillation during transient overload recovery. |
| Dead Time | 0.5–1µs - Prevents shoot-through in each half-bridge leg without requiring external timing circuitry. |
Pinout & Package
Available in SO20 (16+2+2) package with exposed slug internally connected to pins 1, 10, 11, and 20 (GND). Thermal resistance: Rth-j-amb = 51°C/W (standard FR4), reduced to 15°C/W with multi-layer PCB + vias + ground plane.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN1A / IN2A / IN1B / IN2B | Logic Input | TTL/CMOS-compatible bridge direction controls; thresholds Vth(ON) = 1.8V, Vth(OFF) = 1.3V. |
| ENA / ENB | Bridge Enable + OCD Output | Active-high enables; also sinks 4mA during overcurrent fault to force shutdown. |
| OUT1A / OUT2A / OUT1B / OUT2B | Power Output | DMOS drain terminals driving motor windings; support paralleling for higher current or lower RDS(ON). |
| SENSEA / SENSEB | Current Sense Reference | Connect directly to power ground or low-value shunt; used for internal non-dissipative OCD. |
| VSA / VSB | Bridge Power Supply | Independent supply inputs per bridge; must be tied together externally to common 8–52V rail. |
| VBOOT | Bootstrap Voltage | Drives high-side gates above VS; requires external charge-pump network (CBOOT, CP, D1, D2). |
| VCP | Oscillator Output | 600kHz square wave (10V amplitude) powering internal charge pump; drives external CP. |
| GND (Pins 1,10,11,20) | Signal & Thermal Ground | Four dedicated GND pins serve as primary heat dissipation path in SO20 package. |
Key Features
| Feature | Design Value |
|---|---|
| Non-dissipative overcurrent protection | Eliminates external current-sense resistor and associated power loss; uses internal high-side current mirroring. |
| Integrated fast freewheeling diodes | Reduces external component count; 1.15–1.3V forward drop at 2.8A enables efficient energy recirculation. |
| Bootstrap gate drive architecture | Enables use of efficient N-channel MOSFETs on both high- and low-side; eliminates need for isolated supplies. |
| Programmable fault recovery timing | REN/CEN network sets tDISABLE (e.g., 200µs with 100kΩ/5.6nF) to prevent repeated tripping during overload. |
| Paralleled operation support | Four half-bridges can be reconfigured as single full-bridge (RDS(ON) = 0.15Ω) or half-bridge (RDS(ON) = 0.075Ω). |
Applications
| Bipolar Stepper Motor Control | Dual DC Motor Drive |
|---|---|
Use Scenario: Driving 2-phase bipolar stepper motors in CNC positioning stages with microstepping. IC Role / Device Role / Timing Role: Dual full-bridge provides independent phase current control; dead-time logic prevents shoot-through during commutation. Use Value: 5.6A peak current enables high-torque holding at standstill; integrated freewheeling diodes reduce EMI vs discrete solutions. | Use Scenario: Independent bidirectional control of two DC motors in robotic arm joints. IC Role / Device Role / Timing Role: Bridge A drives motor A; Bridge B drives motor B; ENA/ENB allow synchronized start/stop or independent fault isolation. Use Value: Non-dissipative OCD eliminates sense resistor heating in enclosed enclosures; thermal shutdown protects against jam-induced stall. |
| Quad Motor Fan Control | Industrial Conveyor Module |
Use Scenario: Four independent 24V DC fans in HVAC or server cooling systems. IC Role / Device Role / Timing Role: Paralleling OUT1A/OUT1B and OUT2A/OUT2B forms two half-bridges for four unidirectional fan drivers. Use Value: RDS(ON) = 0.075Ω reduces conduction loss by >50% vs single-bridge configuration, improving efficiency at 2.8A load. | Use Scenario: Bidirectional belt-driven conveyor with dynamic braking and overload monitoring. IC Role / Device Role / Timing Role: Full-bridge A drives main conveyor; full-bridge B controls tensioner motor; SENSEA/B monitor load current for predictive maintenance. Use Value: 8–52V wide supply range accommodates battery-backed 24V industrial rails; under-voltage lockout prevents erratic behavior below 6.4V. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual full-bridge motor driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TB6612FNG | Lower voltage (4.5–13.5V), 1.2A continuous, no bootstrap drive - uses internal charge pump only for high-side gate boost. | Suitable for low-voltage robotics but cannot replace L6205D in 24–48V industrial systems. | Select when operating below 15V and space-constrained; avoid for >2A loads or high ambient temperature. |
| DRV8876N | Higher integration: integrated current regulation, SPI interface, 3.6A RMS, 40V max - no external charge-pump components required. | Replaces L6205D where digital control and closed-loop current accuracy are prioritized over cost and simplicity. | Choose for smart motor modules needing diagnostics; not drop-in due to different pinout and control protocol. |
Compared with TB6612FNG and DRV8876N, the L6205D delivers higher voltage/current capability and simpler analog control, making it optimal for rugged 24–48V motion systems where reliability, thermal robustness, and minimal BOM count outweigh digital features.
Availability
L6205D is available at Aetrix Electronics and suitable for bipolar stepper motor control, dual DC motor drive, quad fan management, and industrial conveyor modules requiring stable component supply across extended temperature and voltage ranges.
Supply support for L6205D 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, motion control, and automotive-grade analog/mixed-signal ICs.
The L6205D belongs to ST's MultiPower-BCD motor driver product line, engineered for high-efficiency, thermally resilient motor control in industrial automation and precision motion systems.
FAQ
What is the recommended external charge-pump network for L6205D?
The L6205D requires CBOOT = 220nF, CP = 10nF, RP = 100Ω, and two 1N4148 diodes per bridge. These values ensure stable VBOOT generation at 0.6–1MHz oscillator frequency, maintaining sufficient gate drive margin for high-side N-MOSFETs across 8–52V supply range and temperature extremes.
How does non-dissipative overcurrent protection work without a sense resistor?
The L6205D implements internal current mirroring on each high-side DMOS transistor, delivering a precise fraction (1/n) of output current to the OCD comparator. This eliminates external shunts while maintaining 5.6A ±1.5A trip accuracy, reducing board area, power loss, and thermal drift errors inherent in discrete sensing.
Can L6205D drive a single full-bridge load at 5.6A continuously?
No - the 5.6A rating is peak (≤1ms pulse); continuous RMS current is limited to 2.8A per bridge. Sustained 5.6A operation exceeds thermal limits unless using PowerSO20 with ≥6cm² copper pour and thermal vias, where junction temperature would exceed 125°C even at 25°C ambient.
What layout practices minimize noise coupling into ENA/ENB pins?
Place 5.6nF CEN and 100kΩ REN as close as possible to ENA/ENB pins; route EN traces away from switching nodes (OUTx, VBOOT); use separate power-ground planes for logic and power sections; and tie unused INx pins to 5V or GND - not floating - to prevent false triggering.
L6205D Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- STSPIN L62
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Motor Type - Stepper:
- Bipolar
- Motor Type - AC, DC:
- Brushed DC
- Function:
- Driver - Fully Integrated, Control and Power Stage
- Output Configuration:
- Half Bridge (4)
- Interface:
- Parallel
- Technology:
- BiCDMOS
- Step Resolution:
- -
- Applications:
- General Purpose
- Current - Output:
- 2.8A
- Voltage - Supply:
- 8V ~ 52V
- Voltage - Load:
- 8V ~ 52V
- Operating Temperature:
- -25°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SO
L6205D FAQ
1.How can I place an order for L6205D through Aetrix?
Please submit a Request for Quotation (RFQ) for L6205D 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 L6205D reliable?
The price and inventory of L6205D are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for L6205D is usually 5 days.
3.What payment methods are accepted for L6205D?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for L6205D transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for L6205D?
L6205D orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your L6205D 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 L6205D?
For technical support, including L6205D datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your L6205D requirements.
6.How does Aetrix verify that L6205D is sourced from the original manufacturer or authorized distributors?
All L6205D 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 L6205D meets industry standards.
7.What is the process for return or replacement of L6205D?
All L6205D units undergo pre-shipment inspection (PSI). If there is an issue with L6205D, 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 L6205D part is unused and in its original packaging.
Return procedure for L6205D:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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