BiCMOS Low-Power Current Mode PWM Controller The UCC28C45DGKRG4 is a high-performance current-mode PWM controller manufactured by Texas Instruments (TI).
### **Specifications:**
- **Topology:** Current-mode PWM controller
- **Input Voltage Range (VCC):** 8.5V to 21V (operating)
- **Output Voltage (VREF):** 5V (reference)
- **Switching Frequency:** Up to 1MHz
- **Maximum Duty Cycle:** 100%
- **Operating Temperature Range:** -40°C to +125°C
- **Package:** VSSOP-8 (DGK)
- **Output Current (Source/Sink):** 1A (peak)
- **UVLO (Undervoltage Lockout):** 7.6V (turn-on), 7.2V (turn-off)
- **Error Amplifier Bandwidth:** 5MHz (typical)
### **Descriptions:**
The UCC28C45DGKRG4 is designed for high-frequency switching power supplies, offering precise regulation and fast transient response. It features cycle-by-cycle current limiting, soft-start control, and adjustable dead-time control.
### **Features:**
- **Current-Mode Control:** Enhances loop stability and transient response.
- **Programmable Switching Frequency:** Up to 1MHz.
- **Internal Soft-Start:** Reduces inrush current during startup.
- **Cycle-by-Cycle Current Limiting:** Protects against overloads.
- **Low Startup Current:** 0.5mA (typical).
- **High-Current Totem Pole Output:** 1A peak drive capability.
- **Error Amplifier with High Bandwidth:** Ensures fast response.
- **Undervoltage Lockout (UVLO):** Ensures proper startup and shutdown.
This device is commonly used in AC/DC converters, DC/DC power supplies, and industrial power systems.
