Overview
The TDA3629T/YM/WJ is a light position controller integrated circuit produced by NXP USA Inc. This monolithic IC is designed to control the elevation of the light beam in the headlights of passenger cars. It operates by adjusting the light beam's elevation based on the driver's input via a potentiometer on the dashboard. The device ensures precise control and feedback through a second potentiometer mechanically coupled to the motor. It also includes various protection features such as thermal protection, broken wire detection, and short-circuit indication.
Key Specifications
| Parameter | Conditions | Min. | Typ. | Max. | Unit |
|---|---|---|---|---|---|
| Supply Voltage (VP) | - | 6 | - | 22 | V |
| Supply Current (IP), steady state | VSET = VFB = 0.5VP, Im = 0 | - | - | 6 | mA |
| Supply Current (IP), motor active | Im < 900 mA | - | - | 80 | mA |
| Output Voltage (Vm) | Im < 700 mA, VP ≥ 12.3 V | - | - | 670 | mA |
| Motor Switch On Current Level (ISET) | VP = 12 V | 6 | 9 | 12 | µA |
| Thermal Resistance (Rth j-amb) | - | - | - | 105 | K/W |
Key Features
- Low positional error
- Low noise sensitivity due to hysteresis
- Low supply current
- Thermally protected
- Broken wire and short-circuit indication on SET input
- Brake function by short-circuiting the motor
- Hysteresis level set externally
Applications
The TDA3629T/YM/WJ is primarily used in the automotive industry for controlling the elevation of headlight beams in passenger cars. It is integrated into the vehicle's lighting system to ensure the light beam is adjusted according to the driver's preferences, enhancing visibility and safety.
Q & A
- What is the primary function of the TDA3629T/YM/WJ?
The primary function is to control the elevation of the headlight beam in passenger cars. - How does the TDA3629T/YM/WJ adjust the light beam's elevation?
It adjusts the elevation based on the driver's input via a potentiometer on the dashboard and feedback from a second potentiometer mechanically coupled to the motor. - What are the key protection features of the TDA3629T/YM/WJ?
The device includes thermal protection, broken wire detection, and short-circuit indication. - What is the typical supply current when the motor is active?
The typical supply current when the motor is active is up to 80 mA. - What is the motor switch on current level?
The motor switch on current level is between 6 and 12 µA at VP = 12 V. - What is the thermal resistance of the TDA3629T/YM/WJ?
The thermal resistance is 105 K/W. - In what type of package is the TDA3629T/YM/WJ available?
The TDA3629T/YM/WJ is available in a 16-lead SOIC package. - What is the operating supply voltage range of the TDA3629T/YM/WJ?
The operating supply voltage range is between 6 and 22 V. - How does the device handle under and over voltage conditions?
The device is switched off outside the specified voltage limits and includes under and over voltage detection. - What is the purpose of the hysteresis in the TDA3629T/YM/WJ?
The hysteresis reduces noise sensitivity and helps in maintaining stable control.
