- Few external components are required
- Standard inductors and transformer homes
- NPN output switch 5.0A, can stand off-site 65V
- Wide input voltage range: 4V to 40V
- Current mode operation for improved transient response, profile and current limiting
- Switching frequency of 100 kHz
- An internal soft-start feature reduces inrush current during start-up
- Protects the output transistors from current limiting, undervoltage lockout, and thermal shutdown
- The output voltage tolerance of the system ± line and load conditions up to more than 4%.
illustrate
The voltage regulator LM2587 series is a monolithic IC specifically designed for flyback, step-up (boost), and forward converter applications. The device is available in 4 different output voltage versions: 3.3V, 5.0V, 12V, and adjustable.
Requiring a minimum number of external components, these regulatory bodies are cost-effective and easy to use. Typical circuits for boost and flyback regulators included in the datasheet. While listing diodes and capacitors and a home of standard design work, these switching regulator inductors and flyback transformers are selected guides.
The power switch is a 5.0A NPN device that can be independently turned off at 65V. Protect power switch current and thermal limit circuit, undervoltage lockout circuit. The IC contains an internal oscillator at a fixed frequency of 100 kHz, allowing the use of small magnetics. Other features include a soft-start mode to reduce inrush current, repulsion to improve input voltage and output load transient response during start-up, and cycle-by-cycle current limit repulsion, and current-mode control. The output voltage tolerance is ± 4%, which guarantees the power supply system under the specified input voltage and output load conditions.
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