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UC3845ADTRG4 from TI,Texas Instruments

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UC3845ADTRG4

Manufacturer: TI

Current Mode PWM Controller 14-SOIC 0 to 70

Partnumber Manufacturer Quantity Availability
UC3845ADTRG4 TI 2530 In Stock

Description and Introduction

Current Mode PWM Controller 14-SOIC 0 to 70 The UC3845ADTRG4 is a high-performance current-mode PWM controller manufactured by Texas Instruments (TI).  

### **Specifications:**  
- **Input Voltage Range:** 7.6V to 30V  
- **Output Voltage:** Adjustable  
- **Switching Frequency:** Up to 500kHz  
- **Duty Cycle Range:** 0% to 100%  
- **Operating Temperature Range:** -40°C to 85°C  
- **Package:** SOIC-8  
- **Current Sensing:** Precision current sensing for peak current mode control  
- **Start-Up Current:** Low start-up current (<1mA)  
- **Under-Voltage Lockout (UVLO):** 7.6V (on) / 7.2V (off)  
- **Output Drive Current:** ±1A (peak)  

### **Descriptions:**  
The UC3845ADTRG4 is a fixed-frequency pulse-width modulation (PWM) controller optimized for high-performance DC-DC converters. It features current-mode control for improved loop response and simplified compensation. The device includes a trimmed oscillator, temperature-compensated reference, high-gain error amplifier, and a high-current totem-pole output for driving power MOSFETs.  

### **Features:**  
- **Current-Mode Control:** Enhances transient response and simplifies loop compensation.  
- **Adjustable Oscillator Frequency:** Allows flexible design for various applications.  
- **Precision Reference:** 5V ±1% trimmed bandgap reference.  
- **Soft-Start Capability:** Reduces inrush current during startup.  
- **Pulse-by-Pulse Current Limiting:** Provides cycle-by-cycle protection.  
- **Latching PWM for Overvoltage Protection:** Ensures safety under fault conditions.  
- **Low Power Consumption:** Optimized for efficiency.  

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

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