BiCMOS Low-Power Current Mode PWM Controller The UCC28C44 is a high-performance current-mode PWM controller manufactured by Texas Instruments (TI). Below are its specifications, descriptions, and features based on factual information from Ic-phoenix technical data files:
### **Specifications:**
- **Input Voltage Range (VCC):** 8.5V to 16V (start-up), 7.6V to 16V (operating)
- **Operating Frequency Range:** Up to 1MHz
- **Output Drive Current:** ±1A (peak)
- **Duty Cycle Range:** 0% to 100%
- **Error Amplifier Gain Bandwidth:** 3MHz
- **Current Sense Comparator Delay:** 100ns
- **Soft-Start Capability:** Configurable
- **Undervoltage Lockout (UVLO):** Adjustable
- **Operating Temperature Range:** -40°C to +125°C
- **Package Options:** SOIC-8, PDIP-8
### **Descriptions:**
The UCC28C44 is a versatile PWM controller designed for high-frequency power supply applications. It operates in current-mode control, providing improved loop response and simplified compensation. The device includes features like adjustable switching frequency, cycle-by-cycle current limiting, and soft-start functionality, making it suitable for DC-DC converters, offline power supplies, and industrial applications.
### **Features:**
- **Current-Mode Control:** Enhances transient response and simplifies feedback loop design.
- **Programmable Switching Frequency:** Allows optimization for efficiency and component size.
- **High-Current Totem Pole Output:** Supports fast switching of power MOSFETs.
- **Precision Reference Voltage:** 5V ±1% for accurate regulation.
- **Cycle-by-Cycle Current Limiting:** Protects against overcurrent conditions.
- **Adjustable UVLO:** Ensures reliable start-up and shutdown.
- **Soft-Start Control:** Reduces inrush current during start-up.
- **Low Standby Current:** Improves efficiency in light-load conditions.
- **Synchronization Capability:** Allows external clock synchronization for noise-sensitive applications.
This information is based on TI’s official documentation for the UCC28C44. For detailed application notes or design considerations, refer to the manufacturer’s datasheet.
