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UC3845D8TRG4 from TI,Texas Instruments

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UC3845D8TRG4

Manufacturer: TI

Current-Mode PWM Controller 8-SOIC 0 to 70

Partnumber Manufacturer Quantity Availability
UC3845D8TRG4 TI 5000 In Stock

Description and Introduction

Current-Mode PWM Controller 8-SOIC 0 to 70 The UC3845D8TRG4 is a high-performance current-mode PWM controller manufactured by Texas Instruments (TI).  

### **Specifications:**  
- **Output Type:** Transistor Driver  
- **Topology:** Boost, Flyback, Forward  
- **Output Configuration:** Single  
- **Number of Outputs:** 1  
- **Switching Frequency:** Up to 500kHz  
- **Duty Cycle (Max):** 50%  
- **Supply Voltage (Vcc/Vdd):** 8.5V to 30V  
- **Supply Voltage (Max):** 30V  
- **Supply Voltage (Min):** 8.5V  
- **Operating Temperature:** -40°C to +85°C  
- **Package/Case:** SOIC-8  

### **Descriptions:**  
The UC3845D8TRG4 is a fixed-frequency pulse-width modulation (PWM) controller optimized for high-performance DC-DC converter applications. It features a trimmed oscillator for precise duty cycle control, current sensing, and high-current totem-pole output for driving power MOSFETs.  

### **Features:**  
- **Current-Mode Control:** Improved loop response and simplified compensation.  
- **Automatic Feed-Forward Compensation:** Enhances line regulation.  
- **Latching PWM for Cycle-by-Cycle Current Limiting:** Prevents output overload.  
- **Undervoltage Lockout (UVLO):** Ensures proper startup and shutdown.  
- **Trimmed Oscillator Discharge Current:** Tight frequency control.  
- **High-Current Totem-Pole Output:** Directly drives power MOSFETs.  
- **Low Startup and Operating Current:** Improves efficiency.  

This device is commonly used in power supply applications such as AC-DC converters, DC-DC converters, and battery chargers.

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