Overview
The TDA3681J/N2C,112 is a multiple output voltage regulator integrated circuit produced by NXP USA Inc. It is designed for use in automotive applications, particularly in car radios with or without a microcontroller. This IC combines multiple voltage regulators, a power switch, and an ignition buffer, making it a comprehensive solution for power management in vehicle electronics.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage Range | -18 to +50 | V |
| Load Dump Protection | t ≤ 50 ms; tr ≥ 2.5 ms | V |
| Jump Start Protection | t ≤ 10 minutes; -30 V | V |
| Total Power Dissipation | - 62 W | W |
| Ambient Temperature Range | -40 to +85 | °C |
| Junction Temperature Range | -40 to +150 | °C |
| Thermal Resistance (junction to case) | 1.3 | K/W |
| Thermal Resistance (junction to ambient) | 50 | K/W |
| Package Type | DBS17P (17-pin Dual in-line package) | |
| Mounting Type | Through Hole |
Key Features
- Extremely low noise behavior and good stability with very small output capacitors.
- Four fixed voltage regulators with foldback current protection (regulators 1, 2, 3, and 4).
- Regulator 2 operates during load dump and thermal shutdown.
- Second supply pin for regulators 3 and 4 to reduce power dissipation.
- A power switch with protection, operated by a control input.
- Reset and hold outputs for interfacing with a microcontroller.
- Provision for a reserve supply capacitor to hold energy for regulator 2 during voltage loss.
- Combined control pin for switching regulators 1 and 3, and separate control pins for regulator 4 and the power switch.
Applications
The TDA3681J/N2C,112 is primarily designed for use in automotive electronics, particularly in car radios and other vehicle audio systems. It is also suitable for other applications requiring multiple voltage regulation, power switching, and ignition buffering.
Q & A
- What is the primary function of the TDA3681J/N2C,112? The TDA3681J/N2C,112 is a multiple output voltage regulator with a power switch and an ignition buffer, designed for automotive applications.
- What is the supply voltage range of the TDA3681J/N2C,112? The supply voltage range is from -18 to +50 V.
- How does the TDA3681J/N2C,112 protect against load dump and jump start conditions? It has load dump protection for t ≤ 50 ms and jump start protection for t ≤ 10 minutes up to -30 V.
- What is the thermal resistance from junction to case and ambient? The thermal resistance from junction to case is 1.3 K/W and from junction to ambient is 50 K/W.
- What types of voltage regulators are included in the TDA3681J/N2C,112? It includes four fixed voltage regulators with foldback current protection.
- Can regulator 2 operate during load dump and thermal shutdown? Yes, regulator 2 can operate during these conditions.
- What is the purpose of the second supply pin for regulators 3 and 4? The second supply pin is used to reduce power dissipation by connecting to a lower supply voltage (>6.5 V).
- How does the TDA3681J/N2C,112 interface with a microcontroller? It provides reset and hold outputs that can be used to interface with a microcontroller.
- What is the package type of the TDA3681J/N2C,112? The package type is DBS17P (17-pin Dual in-line package).
- What are the typical applications of the TDA3681J/N2C,112? It is used in car radios and other automotive electronics requiring multiple voltage regulation and power switching.
