STMicroelectronics

L5991D

L5991D Description

The L5991D is an advanced offline switch IC designed and manufactured by STMicroelectronics. This device offers a versatile solution for AC-DC conversion in various applications, featuring a boost-flyback topology. With a surface-mount package and a frequency range up to 1MHz, the L5991D is well-suited for high-performance applications requiring efficient power conversion.

L5991D Features

• ECCN: EAR99
• Topology: Boost, Flyback
• Mounting Type: Surface Mount
• Product Status: Active
• Internal Switch(s): No
• Control Features: Frequency Control, Soft Start, Sync
• Fault Protection: Current Limiting, Over Voltage
• Frequency - Switching: Up to 1MHz
• REACH Status: REACH Unaffected
• Voltage - Start Up: 15V
• Mfr: STMicroelectronics
• Duty Cycle: 93%
• HTSUS: 8542.39.0001
• Package: Tube
• Output Isolation: Isolated
• Voltage - Supply (Vcc/Vdd): 10V ~ 20V
• RoHS Status: ROHS3 Compliant
• Base Product Number: L5991
• Moisture Sensitivity Level (MSL): 3 (168 Hours)

Unique features and advantages of the L5991D include its high switching frequency, which allows for smaller and more efficient power conversion designs. The integrated soft start and sync features help to reduce inrush current and improve overall system reliability. Additionally, the L5991D offers robust fault protection, including current limiting and overvoltage protection, ensuring safe and stable operation in various conditions.

L5991D Applications

The L5991D is ideal for a wide range of applications, including:

1. Telecommunications Equipment: Powering devices such as routers, modems, and switches.
2. Industrial Automation: Providing power for control systems, sensors, and actuators.
3. Medical Devices: Supporting the power requirements of medical instruments and diagnostic equipment.
4. Consumer Electronics: Powering devices like home appliances, gaming consoles, and portable electronics.

Conclusion of L5991D

The L5991D from STMicroelectronics is a high-performance offline switch IC designed for efficient AC-DC conversion in various applications. Its unique features, such as high switching frequency, soft start, and robust fault protection, make it an excellent choice for demanding power conversion requirements. With its versatile boost-flyback topology and surface-mount package, the L5991D is well-suited for a wide range of applications, from telecommunications to consumer electronics.