L9935-TR - Dual H-Bridge Motor Driver | STMicroelectronics
MPN: L9935-TR ✓ Hoạt độngL9935-TR Tóm tắt
A motor driver is an integrated circuit that translates low-power control signals from a microcontroller into the higher voltage and current needed to drive motors. It typically contains H-bridge configurations that allow bidirectional control of DC motors or precise stepping of stepper motors. Motor drivers are essential components in the power management and actuation hierarchy, bridging the gap between digital logic and electromechanical loads.
Key features of the L9935-TR include a wide operating voltage range, high output current capability, and built-in protection features such as thermal shutdown and overcurrent protection. The device also features a low quiescent current in standby mode, making it suitable for battery-powered applications. The PowerSO-20 package ensures efficient heat dissipation, allowing continuous operation at high currents without external heatsinks in many cases.
The L9935-TR utilizes a bipolar technology with integrated power transistors, providing a compact and cost-effective solution for motor control. The device includes a parallel interface for controlling the H-bridges, with inputs for direction and enable signals. The internal protection circuitry ensures reliable operation under fault conditions, such as short circuits or overtemperature, enhancing system robustness.
Typical applications include automotive seat adjustment, mirror control, window lift, and industrial automation systems. The wide supply voltage range and high current capability make it suitable for driving brushed DC motors in these environments. The device's ability to operate at high temperatures (up to 150°C junction) makes it ideal for under-hood automotive applications.
When designing with the L9935-TR, ensure adequate PCB copper area for heat dissipation, especially when operating at high currents. The device requires external flyback diodes for inductive load protection, and proper decoupling capacitors on the supply pins are essential for stable operation. The standby mode can be used to reduce power consumption when the motor is not active.
Bộ thay thế dễ dàng lắp đặt cho L9935-TR — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với L9935-TR (cùng hình factor và footprint) — khác nhau ở Control Interface, Output Current per Channel, Package, Protection Features, Thermal Resistance (junction-to-ambient).
L9935
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →L9935D
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
L9935E
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
DRV8801
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
L9935-TR Tỷ lệ tối đa & tính chất điện
| Supply Voltage Range | 5 V to 40 V |
| Output Current per Channel | 1.2 A |
| Number of Channels | 2 (dual H-bridge) |
| Điện áp đầu ra | Up to 40 V |
| Quiescent Current (Standby) | 10 uA (typ) |
| Nhiệt độ mối nối hoạt động | -40C to +150C |
| Hộp | PowerSO-20 |
| Kiểu lắp đặt | Surface Mount |
| Kháng nhiệt, mối nối đến môi trường | 35 C/W |
| Control Interface | Parallel (IN1, IN2, EN1, EN2) |
| Protection Features | Thermal shutdown, overcurrent protection |
| Standby Mode | Yes |
| Trạng thái RoHS | Compliant |
| Cấp MSL | 3 |
| Kiểu đầu ra | Dual H-bridge |
Cấu hình chân L9935-TR
| Chân 1 | VS — Supply voltage |
| Chân 2 | OUT1 — Motor output 1 |
| Chân 3 | OUT2 — Motor output 2 |
| Chân 4 | GND — Ground |
| Chân 5 | IN1 — Control input 1 |
| Chân 6 | IN2 — Control input 2 |
| Chân 7 | EN1 — Enable input 1 |
| Chân 8 | EN2 — Enable input 2 |
| Chân 9 | OUT3 — Motor output 3 |
| Chân 10 | OUT4 — Motor output 4 |
| Chân 11 | GND — Ground |
| Chân 12 | VS — Supply voltage |
Ứng dụng tiêu biểu
L9935-TR phù hợp cho 6 Áp dụngs: Automotive Seat Adjustment, Industrial Automation, Medical Equipment, Robotics, Home Appliances, Power Tools.
Automotive Seat Adjustment
The L9935-TR drives DC motors for seat position adjustment. Its 1.2A per channel output and 5-40V supply range match automotive power rails. The thermal shutdown protection ensures safe operation under continuous load. In a typical seat adjustment system, the L9935-TR is controlled by a body control module (BCM) via parallel inputs, driving the motor forward or reverse. The wide temperature range (-40C to +150C) allows operation in harsh automotive environments. Compared to discrete H-bridge designs, the integrated driver reduces component count and PCB area, improving reliability.
Được đề xuất
Industrial Automation
In industrial automation, the L9935-TR drives small DC motors in conveyor systems, actuators, and robotic arms. Its 5-40V supply range accommodates 24V industrial buses. The overcurrent protection prevents damage from stalled motors. The device's parallel interface simplifies integration with PLCs or microcontrollers. For a 24V system, the L9935-TR can deliver up to 1.2A, sufficient for many small actuators. The PowerSO-20 package with exposed pad aids heat dissipation in enclosed control cabinets. Compared to relay-based control, the L9935-TR offers faster switching and longer lifespan.
Được đề xuất
Medical Equipment
The L9935-TR is used in medical devices such as infusion pumps and diagnostic equipment to drive small motors. Its low standby current (10 uA) is critical for battery-powered portable devices. The thermal shutdown ensures safe operation in compact enclosures. In an infusion pump, the L9935-TR drives a stepper motor for precise fluid delivery. The dual H-bridge allows full-step control, ensuring accurate dosing. The device's wide temperature range and reliability make it suitable for medical environments. Compared to linear drivers, the H-bridge topology provides efficient bidirectional control.
Được đề xuất
Robotics
In robotics, the L9935-TR drives DC motors for wheel movement and actuator control. Its 1.2A per channel output is suitable for small to medium robots. The parallel interface allows direct connection to microcontrollers. For a two-wheel robot, the L9935-TR can drive both motors independently, enabling differential steering. The thermal shutdown protects the driver during high-load conditions. The device's compact PowerSO-20 package saves space on robot PCBs. Compared to discrete H-bridges, the integrated driver simplifies design and reduces component count.
Được đề xuất
Home Appliances
The L9935-TR is used in home appliances like washing machines and dishwashers to drive pumps and valves. Its 5-40V supply range covers various appliance power rails. The overcurrent protection prevents damage from jammed mechanisms. In a washing machine, the L9935-TR drives the drain pump motor. The device's low standby current reduces power consumption when the appliance is idle. The wide temperature range ensures reliable operation in humid environments. Compared to relay-based control, the L9935-TR offers smoother motor control and longer lifespan.
Được đề xuất
Power Tools
In power tools, the L9935-TR drives brushed DC motors for drilling and cutting. Its 1.2A output is suitable for compact tools. The thermal shutdown protects the driver during prolonged use. The device's wide supply range allows operation from various battery voltages. In a cordless drill, the L9935-TR controls motor speed and direction. The parallel interface enables simple control from a trigger switch. The PowerSO-20 package with exposed pad aids heat dissipation in handheld tools. Compared to discrete H-bridges, the integrated driver reduces size and weight.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho L9935-TR — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | L9935 | L9935D | L9935E | DRV8801 |
|---|---|---|---|---|---|
| Package | PowerSO-20 | PowerSO-20 | PowerSO-20 | PowerSO-20 | PowerSO-20 |
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics | Texas Instruments |
| Supply Voltage Range | 5V to 40V | 5V to 40V | 5V to 40V | 5V to 40V | 8V to 36V |
| Output Current per Channel | 1.2A | 1.2A | 1.5A | 2A | 1.5A |
| Standby Current | 10 uA | 10 uA | 10 uA | 10 uA | 1 uA |
| Thermal Shutdown | Yes | Yes | Yes | Yes | Yes |
| AEC-Q100 Qualified | Yes | Yes | Yes | Yes | No |
| Control Interface | Parallel | Parallel | Parallel | Parallel | Parallel |
Bảo phân biệt quan trọng
- AEC-Q100 qualified for automotive use (vsDRV8801)
- Wide supply voltage range (5V to 40V) (vsDRV8801)
- Low standby current (10 uA) (vsL9935D)
Ghi chú thiết kế
The L9935-TR in PowerSO-20 package has a thermal resistance of 35 C/W (junction-to-ambient). At 1.2A per channel and 12V supply, power dissipation can reach 2.9W (assuming 2V drop across output transistors). This would cause a 101.5C temperature rise above ambient. Ensure adequate PCB copper area (at least 1 square inch) or use a heatsink for continuous operation at high currents.
Place 100nF ceramic capacitors close to the VS pins for high-frequency decoupling. Use a 10uF electrolytic capacitor on the supply rail to handle motor current transients. Connect the exposed pad to the ground plane for improved thermal performance. Keep motor output traces short and wide to minimize inductance and resistance.
Always connect flyback diodes across motor terminals to protect the driver from inductive voltage spikes. Do not exceed the absolute maximum supply voltage of 40V. Ensure the enable pins are properly driven to avoid unintended motor activation. In standby mode, the quiescent current is 10 uA, but ensure the supply is stable to avoid false triggering.
Thông tin tuân thủ
RoHS compliant per STMicroelectronics product page. AEC-Q100 qualified for automotive applications.