Overview
The TMMDB3 from STMicroelectronics is a Diac (Diode for Alternating Current) designed to function as a trigger diode with a fixed voltage reference. It is particularly useful in conjunction with Triacs for simplified gate control circuits or as a starting element in fluorescent lamp ballasts. The device is packaged in an SMD MINIMELF package, ensuring compactness and ease of integration into various applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Breakover Voltage (VBO) | 28 - 36 | V |
| Typical Breakover Voltage | 32 | V |
| Breakover Current (IBO) | Max. 50 µA | µA |
| Repetitive Peak On-State Current (ITRM) | 2 A | A |
| Storage Junction Temperature Range (Tstg) | -40 to +125 | °C |
| Operating Junction Temperature Range (Tj) | -40 to +125 | °C |
| Rise Time (tr) | Max. 2 µs | µs |
| Leakage Current (IR) | Max. 10 µA | µA |
| Peak Current (IP) | Min. 0.30 A | A |
Key Features
- Fixed voltage reference for reliable triggering.
- ECOPACK compliant, meeting environmental requirements.
- Compact SMD MINIMELF package for space-efficient designs.
- High breakover voltage symmetry, ensuring consistent performance.
- Low leakage current and fast rise time for efficient operation.
Applications
- Triggering device for Triac or SCR-based motor and light dimmers.
- Start-up triggering in lighting ballasts for CFL, TL, or LED lamps.
- 32 V trigger device for oscillator circuits.
Q & A
- What is the TMMDB3 used for? The TMMDB3 is used as a triggering device for Triac or SCR-based motor and light dimmers, and as a starting element in fluorescent lamp ballasts.
- What is the typical breakover voltage of the TMMDB3? The typical breakover voltage is 32 V.
- What is the package type of the TMMDB3? The TMMDB3 is packaged in an SMD MINIMELF package.
- Is the TMMDB3 environmentally compliant? Yes, the TMMDB3 is ECOPACK compliant, meeting environmental requirements.
- What are the operating temperature ranges for the TMMDB3? The operating junction temperature range is -40 to +125 °C.
- What is the maximum repetitive peak on-state current for the TMMDB3? The maximum repetitive peak on-state current is 2 A.
- What is the rise time of the TMMDB3? The rise time is a maximum of 2 µs.
- What are some common applications of the TMMDB3? Common applications include triggering in motor and light dimmers, and start-up triggering in lighting ballasts for CFL, TL, or LED lamps.
- How does the TMMDB3 ensure consistent performance? The TMMDB3 ensures consistent performance through its high breakover voltage symmetry.
- What is the leakage current of the TMMDB3? The leakage current is a maximum of 10 µA.
