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TL3845DRG4 from TI/BB,Texas Instruments

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TL3845DRG4

Manufacturer: TI/BB

Current-Mode PWM Controller 14-SOIC 0 to 70

Partnumber Manufacturer Quantity Availability
TL3845DRG4 TI/BB 65 In Stock

Description and Introduction

Current-Mode PWM Controller 14-SOIC 0 to 70 The TL3845DRG4 is a high-performance current-mode PWM controller manufactured by Texas Instruments (TI) and Burr-Brown (BB).  

### **Specifications:**  
- **Topology:** Current-mode PWM controller  
- **Input Voltage Range:** Up to 30V (VCC)  
- **Output Duty Cycle:** Up to 100%  
- **Switching Frequency:** Adjustable up to 500kHz  
- **Output Current (Source/Sink):** 200mA (peak)  
- **Error Amplifier Bandwidth:** 1MHz (typical)  
- **Under-Voltage Lockout (UVLO):** 8.4V (on) / 7.6V (off)  
- **Operating Temperature Range:** -40°C to +85°C  
- **Package:** SOIC-8  

### **Descriptions:**  
The TL3845DRG4 is designed for DC-DC converter applications, providing precise control over power delivery. It features a trimmed oscillator for accurate duty cycle control, a high-gain error amplifier, and a current-sensing comparator for cycle-by-cycle current limiting.  

### **Features:**  
- **Current-Mode Operation:** Improves loop response and simplifies compensation.  
- **Programmable Oscillator:** Allows flexible frequency setting with external components.  
- **Soft-Start Capability:** Reduces inrush current during startup.  
- **Pulse-by-Pulse Current Limiting:** Enhances system protection.  
- **Low Startup Current:** Typically 0.5mA for efficient operation.  
- **Totem-Pole Output:** Suitable for driving MOSFETs directly.  

This device is commonly used in switch-mode power supplies (SMPS), battery chargers, and industrial power systems.

Application Scenarios & Design Considerations

Current-Mode PWM Controller 14-SOIC 0 to 70

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