Overview
The L9903TR, produced by STMicroelectronics, is an integrated circuit designed to control four external N-channel MOS transistors in an H-Bridge configuration. This IC is specifically tailored for DC-motor driving in automotive applications and includes an ISO 9141 compatible interface. It offers a comprehensive set of features to ensure reliable and efficient motor control, including overvoltage, undervoltage, short circuit, and thermal protection.
Key Specifications
| Parameter | Min. | Typ. | Max. | Unit |
|---|---|---|---|---|
| Operating Supply Voltage (VVS) | 8 | - | 20 | V |
| Overvoltage Max. | - | - | 40 | V |
| Quiescent Current in Standby Mode | - | - | 50 µA | - |
| PWM Operation Frequency | - | - | 30 kHz | - |
| Operating Junction Temperature (TJ) | -40 | - | 150 | °C |
| Junction Temperature Thermal Shutdown Threshold (TJSD) | - | - | 150 | °C |
| Thermal Shutdown Hysteresis (TJSDH) | - | 15 | - | °C |
| Thermal Resistance Junction to Ambient (Rth j-amb) | - | - | 85 | °C/W |
Key Features
- Operating supply voltage range from 8V to 20V with overvoltage protection up to 40V.
- ISO 9141 compatible interface for serial communication.
- Charge pump for driving a power MOS with reverse battery protection.
- PWM operation frequency up to 30 kHz.
- Programmable cross conduction protection time.
- Real-time diagnostic output.
- Overvoltage, undervoltage, short circuit, and thermal protection.
- Low quiescent current in standby mode (less than 50 µA).
Applications
The L9903TR is primarily designed for DC-motor driving in automotive applications. It is suitable for controlling motors in various automotive systems, such as wipers, pumps, and other DC motor-driven components. The IC's robust protection features and ISO 9141 interface make it an ideal choice for reliable and efficient motor control in harsh automotive environments.
Q & A
- What is the operating supply voltage range of the L9903TR?
The operating supply voltage range is from 8V to 20V, with overvoltage protection up to 40V.
- What type of interface does the L9903TR support for serial communication?
The L9903TR supports an ISO 9141 compatible interface for serial communication.
- What is the maximum PWM operation frequency of the L9903TR?
The maximum PWM operation frequency is up to 30 kHz.
- Does the L9903TR have built-in protection features?
- What is the quiescent current in standby mode for the L9903TR?
The quiescent current in standby mode is less than 50 µA.
- How does the L9903TR protect against cross conduction in the H-Bridge configuration?
The L9903TR has programmable cross conduction protection time, which is determined by an external capacitor and resistor at the PR pin.
- What is the thermal shutdown threshold for the L9903TR?
The junction temperature thermal shutdown threshold is 150°C.
- Can the L9903TR operate in harsh automotive environments?
- How does the ISO 9141 interface work in the L9903TR?
The ISO 9141 interface provides communication between the microcontroller and a serial bus with a baud rate up to 60 kbit/s via a single wire compatible with VBAT and GND.
- What is the package type for the L9903TR?
The L9903TR is available in a 20-pin SO (Small Outline) package.
