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UCC28C44D from TI/UNITRODE,Texas Instruments

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UCC28C44D

Manufacturer: TI/UNITRODE

BiCMOS Low-Power Current Mode PWM Controller

Partnumber Manufacturer Quantity Availability
UCC28C44D TI/UNITRODE 58 In Stock

Description and Introduction

BiCMOS Low-Power Current Mode PWM Controller The UCC28C44D is a high-performance current-mode PWM controller manufactured by Texas Instruments (TI) under the UNITRODE brand.  

### **Specifications:**  
- **Topology:** Current-mode PWM controller  
- **Input Voltage Range (VCC):** 8.5V to 21V (operating), 7.6V (start-up), 21V (max)  
- **Output Drive Current:** ±1A (peak)  
- **Switching Frequency Range:** Up to 1MHz  
- **Duty Cycle Range:** 0% to 100%  
- **Error Amplifier Bandwidth:** 5MHz  
- **Propagation Delay:** 50ns  
- **Operating Temperature Range:** -40°C to +85°C  
- **Package:** SOIC-8  

### **Descriptions and Features:**  
- **Current-Mode Control:** Provides cycle-by-cycle current limiting and improved transient response.  
- **Programmable Switching Frequency:** Allows flexibility in design with external timing components.  
- **Soft-Start Capability:** Reduces inrush current during startup.  
- **Undervoltage Lockout (UVLO):** Ensures proper operation within the specified voltage range.  
- **High-Current Totem Pole Output:** Directly drives power MOSFETs.  
- **Low Start-Up Current:** Typically 0.5mA.  
- **Internal Trimmed Bandgap Reference:** Provides stable 5V reference (±1% accuracy).  
- **Synchronization Capability:** Allows external clock synchronization.  

This device is commonly used in offline and DC-DC power supplies, telecom power systems, and industrial applications.

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