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UC2844A from ST,ST Microelectronics

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UC2844A

Manufacturer: ST

HIGH PERFORMANCE CURRENT MODE PWM CONTROLLER

Partnumber Manufacturer Quantity Availability
UC2844A ST 1550 In Stock

Description and Introduction

HIGH PERFORMANCE CURRENT MODE PWM CONTROLLER The UC2844A is a high-performance current-mode PWM controller manufactured by STMicroelectronics.  

### **Specifications:**  
- **Input Voltage (VIN):** Up to 30V  
- **Operating Frequency:** Up to 500kHz  
- **Output Current (Peak):** ±1A  
- **Duty Cycle Range:** 0% to 100%  
- **Reference Voltage (VREF):** 5V ±1%  
- **UVLO (Undervoltage Lockout):**  
  - Start-up Threshold: 16V (typical)  
  - Turn-off Threshold: 10V (typical)  
- **Operating Temperature Range:** -40°C to +85°C  
- **Package Options:** SO-8, PDIP-8  

### **Descriptions:**  
- The UC2844A is designed for offline and DC-DC converter applications.  
- It features a trimmed oscillator for precise duty cycle control.  
- Includes a high-gain error amplifier for tight output regulation.  
- Provides current sensing and limiting for improved reliability.  

### **Features:**  
- **Current-Mode Operation:** Improves loop response and simplifies compensation.  
- **Automatic Feed-Forward Compensation:** Enhances line regulation.  
- **Latching PWM for Cycle-by-Cycle Current Limiting:** Prevents overload conditions.  
- **Internal Soft-Start:** Reduces inrush current during startup.  
- **Low Startup Current (≤1mA):** Enables efficient power-up.  
- **Totem-Pole Output:** Optimized for driving power MOSFETs.  

This device is commonly used in power supplies, battery chargers, and LED drivers.

Application Scenarios & Design Considerations

HIGH PERFORMANCE CURRENT MODE PWM CONTROLLER
Partnumber Manufacturer Quantity Availability
UC2844A LINFINITY 324 In Stock

Description and Introduction

HIGH PERFORMANCE CURRENT MODE PWM CONTROLLER The UC2844A is a high-performance current-mode PWM controller manufactured by LINFINITY.  

### **Key Specifications:**  
- **Input Voltage Range:** Up to 30V  
- **Operating Frequency:** Up to 500kHz  
- **Output Current:** 1A (peak)  
- **Duty Cycle Range:** 0% to 100%  
- **Reference Voltage:** 5V (±1%)  
- **Low Startup Current:** <1mA  
- **Operating Temperature Range:** -40°C to +85°C  

### **Descriptions and Features:**  
- **Current-Mode Control:** Provides improved loop response and simplified compensation.  
- **Automatic Feed-Forward Compensation:** Enhances line regulation.  
- **Pulse-by-Pulse Current Limiting:** Protects against overloads.  
- **Under-Voltage Lockout (UVLO):** Ensures proper startup and shutdown.  
- **Trimmed Oscillator Discharge Current:** Allows precise frequency control.  
- **Soft-Start Capability:** Reduces inrush current during startup.  
- **Totem-Pole Output:** Optimized for driving power MOSFETs.  
- **Latching PWM:** Ensures single-pulse response to faults.  

The UC2844A is commonly used in switch-mode power supplies (SMPS), DC-DC converters, and offline power applications.

Application Scenarios & Design Considerations

HIGH PERFORMANCE CURRENT MODE PWM CONTROLLER
Partnumber Manufacturer Quantity Availability
UC2844A MOTO 89 In Stock

Description and Introduction

HIGH PERFORMANCE CURRENT MODE PWM CONTROLLER The UC2844A is a high-performance current-mode PWM controller manufactured by Motorola (MOTO). Below are its key specifications, descriptions, and features:

### **Specifications:**
- **Manufacturer:** Motorola (MOTO)  
- **Type:** Current-Mode PWM Controller  
- **Operating Voltage Range:** 8V to 30V  
- **Output Drive Current:** ±1A (peak)  
- **Switching Frequency:** Up to 500 kHz  
- **Duty Cycle Range:** 0% to 100%  
- **Reference Voltage:** 5V (±1%)  
- **Operating Temperature Range:** -40°C to +85°C  
- **Package Options:** 8-Pin DIP, SOIC  

### **Descriptions:**
- The UC2844A is designed for offline and DC-DC converter applications.  
- It provides precise control for switching power supplies with high efficiency.  
- Features include under-voltage lockout (UVLO), cycle-by-cycle current limiting, and a trimmed oscillator.  
- It is optimized for flyback, forward, and boost converter topologies.  

### **Features:**
- **Current-Mode Operation:** Improves loop response and simplifies compensation.  
- **Automatic Feed-Forward Compensation:** Enhances line regulation.  
- **Under-Voltage Lockout (UVLO):** Ensures reliable startup and shutdown.  
- **Trimmed Oscillator:** Provides accurate frequency control.  
- **High-Current Totem Pole Output:** Directly drives power MOSFETs.  
- **Pulse-by-Pulse Current Limiting:** Protects against overloads.  
- **Low Startup and Operating Current:** Reduces power consumption.  

This information is based solely on the manufacturer's datasheet for the UC2844A.

Application Scenarios & Design Considerations

HIGH PERFORMANCE CURRENT MODE PWM CONTROLLER

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