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UC2845DR2 from TI,Texas Instruments

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UC2845DR2

Manufacturer: TI

High Performance Current Mode Controllers

Partnumber Manufacturer Quantity Availability
UC2845DR2 TI 2420 In Stock

Description and Introduction

High Performance Current Mode Controllers The UC2845DR2 is a high-performance 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 500 kHz  
- **Output Drive Current:** ±1A (peak)  
- **Duty Cycle Range:** 0% to 100%  
- **Error Amplifier Bandwidth:** 1 MHz  
- **Start-Up Current:** <1 mA  
- **Undervoltage Lockout (UVLO):** 7.6V (on), 7.2V (off)  
- **Package:** SOIC-8  

### **Descriptions:**  
The UC2845DR2 is designed for offline and DC-DC converter applications, providing precise control of switching power supplies. It features a trimmed oscillator for accurate duty cycle control, a temperature-compensated reference, and high-gain error amplifier.  

### **Features:**  
- **Current-Mode Operation:** Improves loop response and simplifies compensation.  
- **Automatic Feed-Forward Compensation:** Enhances line regulation.  
- **Pulse-by-Pulse Current Limiting:** Provides cycle-by-cycle protection.  
- **Undervoltage Lockout (UVLO):** Ensures proper start-up and shutdown.  
- **Internal Soft-Start:** Reduces inrush current during start-up.  
- **Latching PWM for Overvoltage Protection:** Prevents damage during faults.  
- **High-Current Totem Pole Output:** Directly drives power MOSFETs.  

This device is commonly used in power supply designs, including flyback, forward, and boost converters.

Application Scenarios & Design Considerations

High Performance Current Mode Controllers
Partnumber Manufacturer Quantity Availability
UC2845DR2 ON 10000 In Stock

Description and Introduction

High Performance Current Mode Controllers The UC2845DR2 is a high-performance current-mode PWM controller manufactured by ON Semiconductor.  

### **Specifications:**  
- **Topology:** Current-mode PWM controller  
- **Input Voltage (VCC):** 7V to 30V  
- **Operating Frequency:** Up to 500kHz  
- **Output Drive Current:** ±1A (peak)  
- **Duty Cycle Range:** 0% to 100%  
- **Reference Voltage (VREF):** 5V (±1%)  
- **Low Startup Current:** <1mA  
- **UVLO (Undervoltage Lockout):** On: 8.4V (typ), Off: 7.6V (typ)  
- **Package:** SOIC-8  

### **Descriptions:**  
The UC2845DR2 is designed for offline and DC-DC converter applications, providing precise control of switching power supplies. It features high-speed operation, cycle-by-cycle current limiting, and automatic feed-forward compensation.  

### **Features:**  
- **Current-Mode Control:** Improves loop response and simplifies compensation.  
- **Programmable Oscillator:** Allows frequency adjustment with external components.  
- **Soft-Start Capability:** Reduces startup stress.  
- **Pulse-by-Pulse Current Limiting:** Enhances system protection.  
- **Under-Voltage Lockout (UVLO):** Ensures proper startup and shutdown.  
- **Totem Pole Output:** Optimized for driving power MOSFETs.  

This device is widely used in power supply designs for industrial, telecom, and consumer electronics.

Application Scenarios & Design Considerations

High Performance Current Mode Controllers
Partnumber Manufacturer Quantity Availability
UC2845DR2 MOT 6846 In Stock

Description and Introduction

High Performance Current Mode Controllers The UC2845DR2 is a high-performance current-mode PWM controller manufactured by Texas Instruments (formerly Unitrode).  

### **Manufacturer:**  
- **MOT (Motorola)** – The UC2845DR2 was originally designed by Unitrode, which was later acquired by Texas Instruments. Motorola (MOT) was also involved in semiconductor manufacturing and may have produced equivalent or related parts.  

### **Specifications:**  
- **Topology:** Current-mode PWM controller  
- **Operating Frequency:** Up to 500 kHz  
- **Output Drive Current:** ±1A (peak)  
- **Supply Voltage Range:** 8V to 30V  
- **Duty Cycle Range:** 0% to 100% (adjustable)  
- **Error Amplifier Bandwidth:** 1 MHz  
- **Soft-Start Capability:** Yes (external capacitor programmable)  
- **Undervoltage Lockout (UVLO):** 8V (on) / 7.6V (off)  
- **Package:** SOIC-8  

### **Descriptions and Features:**  
- **Current-Mode Control:** Provides cycle-by-cycle current limiting for improved transient response.  
- **Automatic Feed-Forward Compensation:** Simplifies loop stabilization.  
- **Latching PWM:** Ensures single-pulse operation per cycle.  
- **Internal Trimmed Bandgap Reference:** 5V ±1% accuracy.  
- **Low Start-Up Current:** Typically <1 mA.  
- **High-Current Totem Pole Output:** Suitable for driving power MOSFETs directly.  
- **Pulse-by-Pulse Current Limiting:** Enhances system reliability.  

This IC is commonly used in switch-mode power supplies (SMPS), DC-DC converters, and offline power applications.

Application Scenarios & Design Considerations

High Performance Current Mode Controllers

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