HIGH VOLTAGE HALF BRIDGE DRIVER WITH OSCILLATOR The L6569AD is a current-mode primary controller IC manufactured by STMicroelectronics. Below are the factual specifications, descriptions, and features from Ic-phoenix technical data files:
### **Specifications:**
- **Manufacturer:** STMicroelectronics
- **Type:** Current-mode PWM controller
- **Topology:** Flyback, Quasi-Resonant (QR)
- **Input Voltage Range:** 8.6V to 18V (VCC)
- **Operating Frequency:** Adjustable (up to 300 kHz)
- **Maximum Duty Cycle:** 50%
- **Start-up Current:** < 50 µA
- **Quiescent Current:** < 3 mA
- **Output Drive Capability:** ±400 mA (peak)
- **Protection Features:**
- Overvoltage Protection (OVP)
- Overload Protection (OLP)
- Undervoltage Lockout (UVLO)
- Latch-off on fault conditions
- **Package:** SO-8
### **Descriptions:**
The L6569AD is a high-performance primary controller designed for offline flyback converters operating in Quasi-Resonant (QR) mode. It optimizes efficiency by enabling valley switching, reducing switching losses. The IC includes advanced protection features for robust operation in power supply applications.
### **Features:**
- **Quasi-Resonant Operation:** Enables valley switching for improved efficiency.
- **Current-Mode Control:** Ensures stable operation with fast transient response.
- **Adjustable Frequency:** Allows optimization for efficiency and EMI performance.
- **Low Power Consumption:** Low start-up and operating currents enhance energy efficiency.
- **Integrated Protections:** Includes OVP, OLP, and UVLO for system reliability.
- **Soft-Start Function:** Reduces inrush current during startup.
- **Latch-off Mode:** Ensures safe shutdown in fault conditions.
This information is based on the manufacturer's datasheet and technical documentation.
