Overview
The SZNUD3124LT1G is an automotive inductive load driver produced by onsemi. This micro-integrated component provides a single solution for switching inductive loads such as relays, solenoids, and small DC motors. It is designed to accept logic level inputs, making it compatible with a variety of devices including logic gates, inverters, and microcontrollers. Despite being discontinued for new designs, it remains a robust option for existing applications requiring reliable inductive load management.
Key Specifications
| Parameter | Symbol | Value | Unit |
|---|---|---|---|
| Drain-to-Source Voltage – Continuous | VDSS | 28 | V |
| Gate-to-Source Voltage – Continuous | VGSS | 12 | V |
| Drain Current – Continuous | ID | 150 | mA |
| Single Pulse Drain-to-Source Avalanche Energy | EZ | 250 | mJ |
| Peak Power Dissipation, Drain-to-Source | PPK | 20 | W |
| Operating Ambient Temperature | TA | -40 to 125 | °C |
| Maximum Junction Temperature | TJ | 150 | °C |
| Storage Temperature Range | TSTG | -65 to 150 | °C |
| Thermal Resistance Junction–to–Ambient (SOT-23) | RθJA | 556 | °C/W |
Key Features
- Provides a robust interface between DC relay coils and sensitive logic.
- Capable of driving relay coils rated up to 150 mA at 12 volts.
- Replaces 3 or 4 discrete components for lower cost.
- Internal Zener eliminates the need for a free-wheeling diode.
- Meets load dump and other automotive specifications.
- SZ prefix indicates AEC-Q101 qualification and PPAP capability for automotive and other unique site and control change requirements.
Applications
The SZNUD3124LT1G is primarily used in automotive applications to manage inductive loads such as relays, solenoids, and small DC motors. It is also suitable for other applications requiring robust and reliable switching of inductive loads.
Example applications include:
- Relay control in automotive systems.
- Solenoid control in various industrial and automotive contexts.
- Driving small DC motors in automotive and industrial environments.
Q & A
- What is the SZNUD3124LT1G used for? The SZNUD3124LT1G is used to switch inductive loads such as relays, solenoids, and small DC motors.
- What is the maximum drain current it can handle? The maximum drain current is 150 mA.
- Does it require a free-wheeling diode? No, it has an internal Zener that eliminates the need for a free-wheeling diode.
- What are the operating temperature ranges? The operating ambient temperature range is -40°C to 125°C, and the maximum junction temperature is 150°C.
- Is it AEC-Q101 qualified? Yes, the SZ prefix indicates AEC-Q101 qualification.
- What package types are available? It is available in SOT-23 and SC-74 packages.
- Why is it discontinued for new designs? It is discontinued for new designs, but existing stocks and documentation are still available for support of current applications.
- What is the thermal resistance for the SOT-23 package? The thermal resistance junction-to-ambient for the SOT-23 package is 556 °C/W.
- Can it handle load dump pulses? Yes, it is designed to handle load dump pulses and meets other automotive specifications.
- How does it integrate with logic devices? It accepts logic level inputs, making it compatible with logic gates, inverters, and microcontrollers.
