Ballast Control, Below Resonance Protection, Thermal Overload Protection, Protection from Failure to Strike, Programmable Preheat Time and Run Frequency, Programmable Deadtime in a 16-lead SOIC Narrow package The IR2157S is a high-voltage, self-oscillating half-bridge driver IC manufactured by International Rectifier (IR). Below are the key specifications, descriptions, and features based on factual information:  

### **Manufacturer:**  
- **International Rectifier (IR)**  

### **Key Specifications:**  
- **Voltage Rating:**  
  - High-side floating supply voltage (V_B): Up to 600V  
  - Logic supply voltage (V_CC): 10V to 20V  
- **Output Current:**  
  - Source: 210mA (typical)  
  - Sink: 420mA (typical)  
- **Frequency Range:** Adjustable via external RC components  
- **Dead Time:** Adjustable (typically 1.2µs)  
- **Operating Temperature Range:** -40°C to +125°C  
- **Package:** 8-pin SOIC (Small Outline Integrated Circuit)  

### **Descriptions:**  
- The IR2157S is designed for driving MOSFETs or IGBTs in half-bridge configurations.  
- It integrates a high-voltage level shifter, oscillator, and gate drive circuitry.  
- Self-oscillating operation eliminates the need for an external PWM controller.  
- Suitable for applications like electronic ballasts, switch-mode power supplies (SMPS), and motor drives.  

### **Features:**  
- **High-Voltage Level Shifting:** Enables high-side drive in half-bridge circuits.  
- **Adjustable Oscillator Frequency:** Set by external resistor and capacitor.  
- **Programmable Dead Time:** Prevents shoot-through in half-bridge circuits.  
- **Under-Voltage Lockout (UVLO):** Protects against low V_CC conditions.  
- **Low Power Consumption:** Optimized for efficiency.  
- **Matched Propagation Delays:** Ensures balanced switching.  

For detailed electrical characteristics and application notes, refer to the official IR2157S datasheet from International Rectifier.

Ballast Control, Below Resonance Protection, Thermal Overload Protection, Protection from Failure to Strike, Programmable Preheat Time and Run Frequency, Programmable Deadtime in a 16-lead SOIC Narrow package