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TL3845DR from TI,Texas Instruments

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TL3845DR

Manufacturer: TI

Current-Mode PWM Controller

Partnumber Manufacturer Quantity Availability
TL3845DR TI 35000 In Stock

Description and Introduction

Current-Mode PWM Controller The TL3845DR is a high-performance current-mode PWM controller manufactured by Texas Instruments (TI). Below are its specifications, descriptions, and features:

### **Specifications:**  
- **Input Voltage Range:** 7.6V to 30V  
- **Operating Frequency:** Up to 500kHz  
- **Output Duty Cycle:** 0% to 100%  
- **Output Current (Source/Sink):** 1A (Peak)  
- **Error Amplifier Gain Bandwidth:** 1MHz  
- **Reference Voltage:** 5V (±1%)  
- **Quiescent Current:** 11mA (Typical)  
- **Operating Temperature Range:** -40°C to +85°C  
- **Package:** SOIC-8  

### **Descriptions:**  
The TL3845DR is a fixed-frequency pulse-width modulation (PWM) controller designed for DC-DC converter applications. It features current-mode control for improved loop response and simplified compensation. The device includes an undervoltage lockout (UVLO) function, ensuring reliable operation under low input voltage conditions.  

### **Features:**  
- **Current-Mode Control:** Enhances transient response and simplifies feedback loop compensation.  
- **Adjustable Oscillator Frequency:** Allows flexibility in design with external timing components.  
- **Undervoltage Lockout (UVLO):** Ensures proper operation only when the supply voltage is within the specified range.  
- **Soft-Start Capability:** Reduces inrush current during startup.  
- **Pulse-by-Pulse Current Limiting:** Provides cycle-by-cycle protection against overcurrent conditions.  
- **Totem-Pole Output:** Capable of driving power MOSFETs directly.  
- **High-Gain Error Amplifier:** Ensures precise voltage regulation.  
- **Low Start-Up Current:** Minimizes power consumption during initial operation.  

The TL3845DR is commonly used in power supply designs, including flyback, forward, and boost converters.

Application Scenarios & Design Considerations

Current-Mode PWM Controller
Partnumber Manufacturer Quantity Availability
TL3845DR TEXAS 2500 In Stock

Description and Introduction

Current-Mode PWM Controller The TL3845DR is a current-mode PWM controller manufactured by Texas Instruments. Below are its key specifications, descriptions, and features:

### **Specifications:**
- **Manufacturer:** Texas Instruments  
- **Type:** Current-Mode PWM Controller  
- **Topology:** Flyback, Forward, Boost, Buck  
- **Input Voltage Range (VCC):** 8V 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 (DR)  

### **Descriptions:**
The TL3845DR is a high-performance PWM controller designed for DC-DC converter applications. It operates in current-mode control, providing improved loop response and simplified compensation. The device includes an oscillator, error amplifier, current-sensing comparator, and a totem-pole output stage capable of driving power MOSFETs.

### **Features:**
- **Current-Mode Control:** Enhances transient response and simplifies feedback loop design.  
- **Adjustable Frequency:** Allows optimization for efficiency and component size.  
- **Undervoltage Lockout (UVLO):** Ensures proper operation within the specified voltage range.  
- **High-Current Totem-Pole Output:** Directly drives power MOSFETs.  
- **Precision Reference Voltage:** 5V ±1% accuracy.  
- **Cycle-by-Cycle Current Limiting:** Protects against overloads.  
- **Low Startup Current:** Typically 0.5mA.  
- **SOIC-8 Package:** Compact and suitable for space-constrained applications.  

This information is based on the manufacturer's datasheet. For detailed electrical characteristics and application circuits, refer to Texas Instruments' official documentation.

Application Scenarios & Design Considerations

Current-Mode PWM Controller

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