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L9903 from ST,ST Microelectronics

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L9903

Manufacturer: ST

MOTOR BRIDGE CONTROLLER

Partnumber Manufacturer Quantity Availability
L9903 ST 692 In Stock

Description and Introduction

MOTOR BRIDGE CONTROLLER The part **L9903** is a **dual H-bridge motor driver IC** manufactured by **STMicroelectronics (ST)**. Below are the factual specifications, descriptions, and features from Ic-phoenix technical data files:

### **Key Specifications:**
- **Supply Voltage Range:** 5.5V to 36V  
- **Output Current (per channel):** Up to 1.5A (continuous)  
- **Peak Current (per channel):** Up to 3A  
- **Operating Temperature Range:** -40°C to +150°C  
- **Package:** PowerSSO-36  

### **Description:**
The **L9903** is a monolithic dual H-bridge motor driver designed for automotive and industrial applications. It provides bidirectional control for two DC motors or one stepper motor. The device includes integrated protection features and is optimized for high-efficiency power management.

### **Features:**
- **Dual H-Bridge Configuration:** Independent control of two DC motors or one stepper motor.  
- **Low RDS(on) MOSFETs:** Reduces power dissipation.  
- **Integrated Protection Circuits:**  
  - Overcurrent protection  
  - Overtemperature protection  
  - Undervoltage lockout (UVLO)  
- **PWM Capability:** Supports pulse-width modulation for speed control.  
- **SPI Interface:** Allows digital control and diagnostics.  
- **Cross-Conduction Prevention:** Built-in dead-time control.  
- **High-Side Current Sensing:** Enables motor current monitoring.  

This information is based on STMicroelectronics' official documentation for the **L9903** motor driver IC.

Application Scenarios & Design Considerations

MOTOR BRIDGE CONTROLLER

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