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UC2845AD8TRG4 from TI,Texas Instruments

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UC2845AD8TRG4

Manufacturer: TI

Current Mode PWM Controller

Partnumber Manufacturer Quantity Availability
UC2845AD8TRG4 TI 5000 In Stock

Description and Introduction

Current Mode PWM Controller The UC2845AD8TRG4 is a current-mode PWM controller manufactured by Texas Instruments (TI).  

### **Specifications:**  
- **Topology:** Current-mode PWM controller  
- **Input Voltage Range (VCC):** 7.6V to 30V  
- **Operating Frequency:** Up to 500kHz  
- **Output Current:** ±1A (peak)  
- **Duty Cycle Range:** 0% to 100%  
- **Error Amplifier Bandwidth:** 1MHz  
- **Undervoltage Lockout (UVLO):** On at 8.4V (typ), Off at 7.6V (typ)  
- **Package:** SOIC-8  
- **Operating Temperature Range:** -40°C to +85°C  

### **Descriptions:**  
The UC2845AD8TRG4 is a high-performance fixed-frequency PWM controller optimized for DC-DC converter applications. It features current-mode control for improved loop response and line regulation. The device includes an integrated error amplifier, oscillator, PWM comparator, and high-current totem-pole output driver.  

### **Features:**  
- **Current-Mode Operation:** Provides cycle-by-cycle current limiting.  
- **Automatic Feed-Forward Compensation:** Simplifies feedback loop design.  
- **Latching PWM:** Ensures single-pulse operation per cycle.  
- **Internal Trimmed Bandgap Reference:** 5V ±1% accuracy.  
- **Soft-Start Capability:** Reduces inrush current.  
- **Low Startup Current:** Typically 0.5mA.  
- **High-Current Totem-Pole Output:** Directly drives power MOSFETs.  

This device is commonly used in power supplies, battery chargers, and DC-DC converters.

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