Current-Mode PWM Controller The UC2843DTR is a high-performance current-mode PWM controller manufactured by Texas Instruments (TI).
### **Specifications:**
- **Topology:** Current-mode PWM controller
- **Input Voltage (VCC):** 8.4V to 30V (operating)
- **Output Current (Source/Sink):** 1A (peak)
- **Switching Frequency:** Up to 500kHz
- **Duty Cycle Range:** 0% to 100%
- **Error Amplifier Bandwidth:** 1MHz
- **Undervoltage Lockout (UVLO):** On: 8.4V (typ), Off: 7.6V (typ)
- **Operating Temperature Range:** -40°C to +85°C
- **Package:** SOIC-8
### **Descriptions:**
The UC2843DTR is designed for offline and DC-DC converter applications, providing precise control of switching power supplies. It features a trimmed oscillator for accurate duty cycle control, current sensing, and a high-gain error amplifier.
### **Features:**
- **Current-Mode Operation:** Improves loop response and simplifies compensation.
- **Automatic Feed-Forward Compensation:** Ensures consistent performance over input voltage variations.
- **Pulse-by-Pulse Current Limiting:** Enhances system reliability.
- **Latching PWM for Overvoltage Protection:** Prevents damage during fault conditions.
- **Soft-Start Capability:** Reduces inrush current at startup.
- **Low Startup Current (≤1mA):** Enables efficient power-up.
- **Totem-Pole Output:** Directly drives power MOSFETs.
This device is commonly used in power supplies, battery chargers, and industrial applications.
