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L5991D013TR from ST,ST Microelectronics

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L5991D013TR

Manufacturer: ST

PRIMARY CONTROLLER WITH STANDBY

Partnumber Manufacturer Quantity Availability
L5991D013TR ST 13889 In Stock

Description and Introduction

PRIMARY CONTROLLER WITH STANDBY The L5991D013TR is a high-voltage monolithic power switching regulator manufactured by STMicroelectronics.  

### **Specifications:**  
- **Input Voltage Range:** 8V to 18V  
- **Output Voltage:** Adjustable  
- **Switching Frequency:** Up to 1MHz  
- **Output Current:** Up to 2A  
- **Operating Temperature Range:** -40°C to 150°C  
- **Package:** SO-8  

### **Descriptions:**  
- Designed for offline and DC-DC converters  
- Includes a high-voltage startup circuit  
- Features a precision reference voltage (1.25V)  
- Provides soft-start and current limiting  

### **Features:**  
- **High-Voltage Startup:** Reduces external component count  
- **Adjustable Output Voltage:** Via external resistors  
- **PWM Control:** Fixed-frequency operation  
- **Protections:** Overcurrent, thermal shutdown, and undervoltage lockout (UVLO)  
- **Low Standby Current:** Improves efficiency in light-load conditions  

This information is based solely on the manufacturer's technical documentation.

Application Scenarios & Design Considerations

PRIMARY CONTROLLER WITH STANDBY

Alternative Part Number

  • UC3842BD1R2G --: Industry-standard current-mode PWM controller in SOIC-8, widely used as a functional substitute for ST's L5991 in offline flyback and forward converters; different series and prefix make it easy to distinguish.
  • NCP1252ADR2G --: Current-mode PWM controller with integrated soft-start and brown-out, pin-compatible SOIC-8 footprint suitable for similar SMPS designs; different naming series from the source part.
  • SG6848DZ --: Green-mode current-mode PWM controller in SOIC-8 for flyback power supplies, offering comparable control functions and a clearly different part-number series.

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