Overview
The LM2585T-ADJ/NOPB is a monolithic integrated circuit designed by Texas Instruments for use in flyback, step-up (boost), and forward converter applications. This regulator is part of the SIMPLE SWITCHER family and is known for its simplicity and cost-effectiveness, requiring a minimal number of external components. The device is available in various output voltage versions, including fixed voltages of 3.3 V, 5 V, 12 V, and an adjustable output voltage option.
Key Specifications
| Parameter | Description |
|---|---|
| Package | TO-220 (NDH) with 5 pins |
| Operating Temperature Range | -40°C to 125°C |
| Input Voltage Range | 4 V to 40 V |
| Output Current | Up to 3 A |
| Switching Frequency | 100 kHz |
| Output Voltage Tolerance | ±4% maximum over line and load conditions |
| Power Switch | NPN device, can stand off 65 V |
| Protection Features | Current limit, undervoltage lockout, thermal shutdown |
Key Features
- Requires few external components, making it cost-effective and simple to use.
- Family of standard inductors and transformers available.
- NPN output switches 3 A, can stand off 65 V.
- Wide input voltage range: 4 V to 40 V.
- Current-mode operation for improved transient response, line regulation, and current limit.
- Internal soft-start function reduces in-rush current during start-up.
- Output transistor protected by current limit, undervoltage lockout, and thermal shutdown.
- System output voltage tolerance of ±4% maximum over line and load conditions.
Applications
The LM2585T-ADJ/NOPB is suitable for a variety of power supply applications, including flyback, step-up (boost), and forward converters. It is particularly useful in systems that require a wide input voltage range and high current output. Typical applications include industrial power supplies, automotive systems, and other electronic devices that need reliable and efficient power conversion.
Q & A
- What is the input voltage range of the LM2585T-ADJ/NOPB? The input voltage range is 4 V to 40 V.
- What is the maximum output current of the LM2585T-ADJ/NOPB? The maximum output current is up to 3 A.
- What is the switching frequency of the LM2585T-ADJ/NOPB? The switching frequency is 100 kHz.
- What protection features does the LM2585T-ADJ/NOPB have? It includes current limit, undervoltage lockout, and thermal shutdown.
- What is the output voltage tolerance of the LM2585T-ADJ/NOPB? The output voltage tolerance is ±4% maximum over line and load conditions.
- What type of power switch does the LM2585T-ADJ/NOPB use? It uses an NPN device that can stand off 65 V.
- How does the LM2585T-ADJ/NOPB reduce in-rush current during start-up? It has an internal soft-start function.
- What is the operating temperature range of the LM2585T-ADJ/NOPB? The operating temperature range is -40°C to 125°C.
- In what package is the LM2585T-ADJ/NOPB available? It is available in a TO-220 (NDH) package with 5 pins.
- Can the LM2585T-ADJ/NOPB be used in automotive systems? Yes, it is suitable for automotive systems due to its wide input voltage range and robust protection features.
