Overview
The STPS1L40U, produced by STMicroelectronics, is a 40 V, 1 A low drop power Schottky rectifier. This component is designed for use in switched mode power supplies and high frequency DC to DC converters. It is packaged in various surface mount packages, including SMB, SMA, SMA Flat Notch, and SOD123Flat, making it ideal for surface mounting in low voltage, high frequency applications.
The STPS1L40U is characterized by its very small conduction losses, negligible switching losses, and low forward voltage drop. It is also avalanche rated and compliant with ECOPACK2 environmental standards.
Key Specifications
| Symbol | Parameter | Value | Unit |
|---|---|---|---|
| VRRM | Repetitive peak reverse voltage | 40 | V |
| IF(RMS) | Forward rms current (SMA/SMB) | 8 | A |
| IF(AV) | Average forward current (δ = 0.5, square wave) | 1 | A |
| IFSM | Surge non repetitive forward current (tp = 10 ms sinusoidal) | 60 (SMA/SMB), 50 (SOD123Flat) | A |
| PARM | Repetitive peak avalanche power (tp = 10 µs, Tj = 125 °C) | 65 | W |
| Tstg | Storage temperature range | -65 to +175 | °C |
| Tj | Operating junction temperature | +175 | °C |
| VF(typ.) | Forward voltage drop (Tj = 25 °C, IF = 1 A) | 0.37 | V |
| Rth(j-l) | Junction to lead thermal resistance | 30 (SMA), 25 (SMB), 20 (SMA Flat Notch, SOD123Flat) | °C/W |
Key Features
- Very small conduction losses and negligible switching losses.
- Low forward voltage drop (typ. 0.37 V at 1 A).
- Avalanche rated.
- Available in surface mount miniature packages (SMA, SMB, SMA Flat Notch, SOD123Flat).
- ECOPACK2 compliant, meeting environmental requirements.
- High operating junction temperature up to +175 °C.
- Low reverse leakage current.
Applications
- Reverse polarity protection.
- Set-top box power supply.
- TV power supply.
- Battery chargers.
- Low voltage, high frequency inverters and free-wheeling applications.
Q & A
- What is the maximum repetitive peak reverse voltage of the STPS1L40U?
The maximum repetitive peak reverse voltage is 40 V.
- What is the average forward current rating of the STPS1L40U?
The average forward current rating is 1 A (δ = 0.5, square wave).
- What are the typical forward voltage drop values for the STPS1L40U?
The typical forward voltage drop is 0.37 V at 1 A and 0.42 V at 2 A.
- What are the package options available for the STPS1L40U?
The component is available in SMB, SMA, SMA Flat Notch, and SOD123Flat packages.
- Is the STPS1L40U environmentally compliant?
Yes, it is ECOPACK2 compliant.
- What is the maximum operating junction temperature of the STPS1L40U?
The maximum operating junction temperature is +175 °C.
- What are some common applications of the STPS1L40U?
Common applications include reverse polarity protection, set-top box power supplies, TV power supplies, battery chargers, and low voltage, high frequency inverters.
- How does the thermal resistance vary among different packages?
The thermal resistance (Rth(j-l)) varies: 30 °C/W for SMA, 25 °C/W for SMB, and 20 °C/W for SMA Flat Notch and SOD123Flat.
- What is the surge non-repetitive forward current rating of the STPS1L40U?
The surge non-repetitive forward current rating is 60 A for SMA/SMB and 50 A for SOD123Flat.
- What is the repetitive peak avalanche power rating of the STPS1L40U?
The repetitive peak avalanche power rating is 65 W (tp = 10 µs, Tj = 125 °C).
