Current Mode PWMs The UC2843AD is a high-performance current-mode PWM controller manufactured by Texas Instruments. Below are the specifications, descriptions, and features based on factual information:
### **Manufacturer:**
- **Texas Instruments**
### **Specifications:**
- **Topology:** Current-mode PWM controller
- **Input Voltage Range (VCC):** 8.4V to 30V (operating), 7.9V (start-up threshold)
- **Output Drive Current:** ±1A (peak)
- **Switching Frequency:** Up to 500kHz
- **Duty Cycle Range:** 0% to 100%
- **Reference Voltage (VREF):** 5V ±1%
- **Error Amplifier Gain Bandwidth:** 1MHz
- **Operating Temperature Range:** -40°C to +85°C
- **Package:** SOIC-8
### **Descriptions:**
- The UC2843AD is designed for offline and DC-DC converter applications.
- It provides precise duty cycle control with current-mode operation for improved loop response and simplified compensation.
- Features include under-voltage lockout (UVLO), cycle-by-cycle current limiting, and a trimmed oscillator for accurate frequency control.
### **Features:**
- **Current-Mode Operation:** Enhances transient response and simplifies loop compensation.
- **Automatic Feed-Forward Compensation:** Improves line regulation.
- **Under-Voltage Lockout (UVLO):** Ensures proper start-up and shutdown.
- **Trimmed Oscillator:** Provides precise frequency control.
- **High-Current Totem Pole Output:** Directly drives power MOSFETs.
- **Pulse-by-Pulse Current Limiting:** Protects against overloads.
- **Low Startup and Operating Current:** Reduces power consumption.
This information is sourced from the manufacturer's datasheet and technical documentation.
