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L6571BD from STM,ST Microelectronics

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L6571BD

Manufacturer: STM, ST

HIGH VOLTAGE HALF BRIDGE DRIVER WITH OSCILLATOR

Partnumber Manufacturer Quantity Availability
L6571BD STM, ST 18680 In Stock

Description and Introduction

HIGH VOLTAGE HALF BRIDGE DRIVER WITH OSCILLATOR The L6571BD is a high-voltage resonant controller manufactured by STMicroelectronics (STM). Below are the factual specifications, descriptions, and features from Ic-phoenix technical data files:

### **Descriptions:**  
- The L6571BD is designed for resonant half-bridge topologies, providing advanced control for high-efficiency power supplies.  
- It integrates a high-voltage gate driver and a resonant controller, enabling zero-voltage switching (ZVS) in LLC resonant converters.  
- Suitable for applications such as AC-DC adapters, LED drivers, and industrial power supplies.  

### **Key Features:**  
- **High-Voltage Startup:** Built-in high-voltage startup circuit (up to 600V).  
- **Frequency Control:** Adjustable switching frequency for resonant mode operation.  
- **Soft-Start:** Programmable soft-start for smooth power-up.  
- **Protections:**  
  - Overcurrent protection (OCP) with adjustable threshold.  
  - Overvoltage protection (OVP).  
  - Undervoltage lockout (UVLO).  
- **Gate Drivers:** High-current gate drivers for external MOSFETs (up to 0.5A source/sink).  
- **Operating Frequency Range:** Typically up to 500kHz.  
- **Package:** SO-16 (L6571BD).  

### **Specifications:**  
- **Input Voltage Range (VCC):** 8.7V to 16V (operating), up to 20V (absolute max).  
- **High-Voltage Startup Current:** ~1mA (typical).  
- **Gate Drive Output Voltage:** 12V (typical).  
- **Operating Temperature Range:** -40°C to +125°C.  

This information is based solely on STMicroelectronics' official documentation for the L6571BD.

Application Scenarios & Design Considerations

HIGH VOLTAGE HALF BRIDGE DRIVER WITH OSCILLATOR

Alternative Part Number

  • IRS2153D --: Self-oscillating half-bridge driver with similar high/low side gate drive function and 600V rating, commonly used as a direct functional replacement.
  • FAN7382 --: High and low side gate driver with comparable output current and bootstrap operation, suitable for the same half-bridge inverter applications.
  • IR2153 --: Classic self-oscillating half-bridge driver with similar topology and voltage rating, widely available and electrically compatible in most circuits.
  • IRS2153DPBF --: Self-oscillating half-bridge driver with similar high/low side gate drive function and 600V rating, widely used as a drop-in replacement for L6571B-type drivers.
  • FAN7382MX --: High-voltage half-bridge gate driver with comparable floating channel and bootstrap operation, suitable substitute for fluorescent lamp ballast and half-bridge inverter applications.
  • IR21531DPBF --: Self-oscillating half-bridge driver in DIP-8 with similar oscillator and dead-time behavior, a common cross-reference for ST L6571 series ballast drivers.

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