L9935 - 1A Dual H-Bridge Stepper Motor Driver | STMicroelectronics
MPN: L9935 ✓ فعالL9935 نمای کلی
A stepper motor driver is an integrated circuit that translates low-power control signals from a microcontroller into the higher-current, higher-voltage signals needed to drive a stepper motor. It typically contains H-bridge topologies that allow bidirectional current flow through the motor windings, enabling precise position control in open-loop systems. Stepper motor drivers are a subset of motor drivers, which fall under power management ICs, specifically designed for motion control in automotive, industrial, and consumer applications.
Key features of the L9935 include a wide supply voltage range (5V to 40V), continuous output current of 1A per channel, and integrated chopping current regulation to minimize power dissipation. The device also features controlled output voltage slopes to reduce electromagnetic radiation, short-circuit protection on all outputs, and an error flag for overload, open load, and overtemperature pre-alarm. The PowerSO-20 package offers a thermal resistance of 35°C/W, allowing operation at high ambient temperatures without external heatsinking in moderate load conditions.
The L9935 utilizes a bipolar-CMOS-DMOS (BCD) process technology, integrating power MOSFETs with control logic on a single die. This architecture provides high efficiency and fast switching, with a typical rise/fall time of 100ns. The device includes a serial interface for controlling the H-bridges, reducing the number of GPIO pins required from the microcontroller. The built-in protection features ensure robust operation in harsh automotive environments, where voltage transients and thermal stress are common.
Typical applications include automotive DC motor control for power windows, mirrors, and seat adjustment, as well as industrial automation for conveyor belts and robotic actuators. The wide supply voltage range and high current capability make it versatile for various motor types, including brushed DC motors and stepper motors in bipolar configurations.
When designing with the L9935, ensure adequate PCB copper area for heat dissipation, especially when operating at high currents. The standby mode can be used to reduce power consumption when the motor is idle, but note that the serial interface must be re-initialized after waking from standby. Proper decoupling capacitors on the supply and logic pins are essential to maintain stable operation.
جایگزین‌های drop-in برای L9935 — همان پکیج، سازگار پین‌به‌پین. قطعات با پکیج متفاوت که نیاز به تغییر PCB دارند مستثنی هستند.
گونه‌ها در این سری
مدل‌های هم‌سری که جایگزین مستقیم هستند برای L9935 (همان فرم‌فاکتور و فوت‌پرینت) — متفاوت در Control Interface, Output Current per Channel, Package, Protection Features, Thermal Resistance (junction-to-ambient).
L9935_V01
✅ جایگزین مستقیم📋 جایگزین مرجع (خارج از کاتالوگ)
L6201P
⚡ پکیج یکسان ⚠️ مشخصات تأییدنشده📋 جایگزین مرجع (خارج از کاتالوگ)
L6234D
⚡ پکیج یکسان ⚠️ مشخصات تأییدنشده📋 جایگزین مرجع (خارج از کاتالوگ)
L9935 حداکثر مقادیر مجاز و مشخصات الکتریکی
| Motor Type | Bipolar Stepper |
| Output Current per Channel | 1 A |
| Supply Voltage Range | 5 V to 40 V |
| تعداد خروجی‌ها | 2 Full Bridges |
| Control Interface | SPI |
| بسته‌بندی | PowerSO-20 (20-SOIC, 0.433", 11.00mm Width) Exposed Pad |
| نوع نصب | Surface Mount |
| مقاومت حرارتی، اتصال به محیط | 35 °C/W |
| Saturation Voltage | 1.2 V at 1 A |
| Rise/Fall Time | 100 ns (typical) |
| Protection Features | Short-Circuit, Thermal Shutdown, Overload, Open Load, Overtemperature Pre-alarm |
| Standby Mode | Yes |
| Process Technology | BCD (Bipolar-CMOS-DMOS) |
| وضعیت RoHS | Compliant |
پیکربندی پین L9935
| پین 1 | OUT1A — Output 1A - H-bridge 1 output |
| پین 2 | OUT1B — Output 1B - H-bridge 1 output |
| پین 3 | VS — Supply voltage |
| پین 4 | OUT2A — Output 2A - H-bridge 2 output |
| پین 5 | OUT2B — Output 2B - H-bridge 2 output |
| پین 6 | GND — Ground |
| پین 7 | SD — Shutdown input |
| پین 8 | CLK — Clock input for SPI |
| پین 9 | DATA — Data input for SPI |
| پین 10 | CS — Chip select for SPI |
| پین 11 | FLAG — Error flag output |
| پین 12 | VSS — Logic supply voltage |
کاربردهای معمول
L9935 مناسب است برای 6 کاربردs: Automotive Power Windows, Industrial Conveyor Belt Control, Robotic Actuators, Automotive Mirror Adjustment, 3D Printers, Medical Device Positioning.
Automotive Power Windows
The L9935 drives the DC motor for power windows, providing bidirectional control and protection. Its 1A output current and 5V-40V supply range make it suitable for 12V automotive systems. The integrated short-circuit protection and thermal shutdown ensure reliable operation in harsh environments. The SPI interface allows precise control of window position and speed.
پیشنهادی
Industrial Conveyor Belt Control
The L9935 drives the stepper motor in conveyor belt systems, providing precise position control and high reliability. Its 1A output current and integrated current regulation ensure smooth operation. The wide supply voltage range (5V-40V) allows use in 24V industrial systems. The error flag output provides diagnostic information for predictive maintenance.
پیشنهادی
Robotic Actuators
The L9935 drives the stepper motors in robotic actuators, providing precise position and speed control. Its 1A output current and SPI interface enable smooth, coordinated motion. The integrated protection features prevent damage from overloads and short circuits. The compact PowerSO-20 package is ideal for space-constrained robot designs.
پیشنهادی
Automotive Mirror Adjustment
The L9935 drives the DC motors for mirror adjustment, providing precise positioning and protection. Its 1A output current and 5V-40V supply range are suitable for 12V automotive systems. The SPI interface allows fine control of mirror position. The thermal shutdown feature prevents damage during prolonged operation.
پیشنهادی
3D Printers
The L9935 drives the stepper motors in 3D printers, providing precise position control for the print head and build platform. Its 1A output current and integrated current regulation ensure smooth, accurate motion. The SPI interface allows fine control of motor speed and position. The compact package is ideal for space-constrained printer designs.
پیشنهادی
Medical Device Positioning
The L9935 drives the stepper motors in medical devices for precise positioning, such as in infusion pumps or diagnostic equipment. Its 1A output current and SPI interface enable accurate, repeatable motion. The integrated protection features ensure safe operation in medical environments. The wide supply voltage range allows use in various power systems.
پیشنهادی
خلاصه محصولات پیشنهادی
داده‌های مرجع مهندسی برای L9935 — مقایسه، راهنمای طراحی و اطلاعات انطباق.
راهنمای انتخاب
مقایسه با جایگزین‌ها
| پارامتر | این محصول | L9935_V01 | L6201P | L6234D |
|---|---|---|---|---|
| Package | PowerSO-20 | PowerSO-20 | PowerSO-20 | PowerSO-20 |
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics |
| Output Current per Channel | 1 A | 1 A | 1 A | 1.4 A (peak) |
| Supply Voltage Range | 5 V to 40 V | 5 V to 40 V | 12 V to 48 V | 7 V to 52 V |
| Control Interface | SPI | SPI | Parallel | Parallel |
| Number of Outputs | 2 Full Bridges | 2 Full Bridges | 2 Full Bridges | 3 Half Bridges |
| Integrated Current Regulation | Yes | Yes | No | No |
| Short-Circuit Protection | Yes | Yes | Yes | Yes |
تفاوت‌های کلیدی
- Integrated chopping current regulation (در مقابلL6201P)
- SPI control interface (در مقابلL6201P)
- Controlled output voltage slopes (در مقابلL6234D)
یادداشت‌های طراحی
The L9935 in PowerSO-20 package has a thermal resistance of 35°C/W. At 1A output current and 12V supply, power dissipation can be significant. Ensure adequate PCB copper area and consider a heatsink for high ambient temperature applications. The exposed pad should be soldered to a large copper pour for optimal heat transfer.
Place decoupling capacitors (100nF and 10uF) close to the VS and VSS pins to filter noise and prevent voltage spikes. Use a ground plane to minimize EMI. The controlled output voltage slopes of the L9935 help reduce electromagnetic radiation, but proper layout is still essential for compliance with EMC standards.
After waking from standby mode, the SPI interface must be re-initialized. Ensure the microcontroller firmware handles this correctly. Also, verify that the supply voltage does not exceed the absolute maximum rating of 40V, as transients in automotive systems can cause damage. Use a TVS diode for protection.
اطلاعات انطباق
RoHS compliant per STMicroelectronics product page. AEC-Q100 qualification not specified for this part.
